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WO2018157766A1 - Réacteur discontinu à séquençage modifié à unités multiples et ses applications - Google Patents

Réacteur discontinu à séquençage modifié à unités multiples et ses applications Download PDF

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Publication number
WO2018157766A1
WO2018157766A1 PCT/CN2018/077168 CN2018077168W WO2018157766A1 WO 2018157766 A1 WO2018157766 A1 WO 2018157766A1 CN 2018077168 W CN2018077168 W CN 2018077168W WO 2018157766 A1 WO2018157766 A1 WO 2018157766A1
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Prior art keywords
unit
anoxic
aerobic
batch
reaction
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English (en)
Chinese (zh)
Inventor
杨企星
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CORSTAR ENVIRONMENTAL EQUIPMENT SHANGHAI Ltd
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CORSTAR ENVIRONMENTAL EQUIPMENT SHANGHAI Ltd
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Priority to KR1020197028904A priority Critical patent/KR102197595B1/ko
Publication of WO2018157766A1 publication Critical patent/WO2018157766A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1263—Sequencing batch reactors [SBR]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/301—Aerobic and anaerobic treatment in the same reactor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention belongs to the technical field of sewage treatment.
  • the invention relates to a multi-unit (especially 10 unit) modified batch batch reactor and its application in the treatment of sewage (especially sewage in southern China).
  • a typical one-chamber five-chamber modified sequential batch reactor includes an anaerobic reaction unit, a separation unit, a main aeration (aerobic) unit, and two sequential treatment (sequence) units at each half.
  • one of the sequencing batch units precipitates water
  • the other sequencing batch unit performs five-stage sewage recycling treatment with other units to remove phosphorus and nitrogen.
  • the single-cased line of the reactor is complicated.
  • the inventors have devised a six-chamber modified batch batch reactor comprising an anaerobic reaction unit, an anoxic reaction unit, a separation unit, a main aeration unit and two sequencing units.
  • one of the sequencing batches precipitates water, and the other sequencing batch unit performs a three-stage process of anoxic mixing, aerobic aeration and pre-precipitation.
  • the inventors have conducted arduous research, and have relied on decades of experience in the field to eliminate a large number of interference factors, such as the most easily affected temperature effects and the influence of environmental microorganisms, and finally found the most important problem.
  • the cause is that the carbon to nitrogen ratio of sewage in southern China is lower.
  • the inventors thoroughly examined the above-mentioned modified batch batch reactor, and specially designed the sewage treatment equipment for the sewage which has almost abandoned the equipment structure and additionally has a lower ratio of carbon to nitrogen ratio in the southern part of China. At that time, especially with the luck of some heavenly rewards, invented a (one pool) 10 unit modified batch batch reactor.
  • the (one pool) 10 unit modified batch batch reactor greatly improves the phosphorus and nitrogen removal effect of the system by making full use of the raw water carbon source, especially the total nitrogen removal rate, and can be effectively eliminated without adding or adding too much agent. Solved the above problems. Moreover, the (single pool) 10 unit modified batch batch reactor has good water quality adaptability, can not only effectively treat sewage with lower ratio of carbon to nitrogen ratio, but also can be used as an 8-unit modified batch batch reactor. Efficiently replace the existing improved batch batch reactor to treat sewage with higher ratio of carbon to nitrogen ratio, providing an effective means for the country's latest sewage treatment standards; in addition, it can use the original one-cell multi-chamber equipment production line, saving upgrades cost.
  • the technical problem to be solved by the present invention is to provide a new improved batch batch reactor which is suitable for treating sewage with a low ratio of carbon to nitrogen ratio, and preferably has good water quality adaptability. Further, the present invention accordingly provides a method of treating raw water containing organic matter.
  • the present invention provides an improved sequential batch reactor comprising an anaerobic reaction unit (4), a first anoxic reaction unit (5), and a muddy water separation unit (2)
  • the aerobic unit (6), the first sequencing batch unit (1) and the second sequencing batch unit (7) further comprising a pre-anoxic unit (3), a second anoxic reaction unit (5A), and a first deficiency / aerobic reaction unit (1A) and second aerobic reaction unit (7A);
  • the anaerobic reaction unit (4) is capable of accepting raw water and accepting sediment from the pre-anoxic unit (3) And can cause the content liquid to react under anaerobic conditions;
  • a first anoxic reaction unit (5) capable of accepting a supernatant from the mud-water separation unit (2), capable of receiving a treatment liquid from the anaerobic reaction unit (4), and capable of causing the content liquid to be under anoxic conditions Carry out the reaction;
  • a second anoxic reaction unit (5A) capable of accepting a supernatant from the mud-water separation unit (2), capable of receiving a treatment liquid from the first anoxic reaction unit (5), and capable of causing the content liquid to be in anoxic Carry out the reaction under the conditions;
  • An aerobic unit (6) capable of accepting a supernatant from the mud-water separation unit (2), capable of receiving a treatment liquid from the second anoxic reaction unit (5A), and allowing the content liquid to be subjected to aeration conditions reaction;
  • a first deficient/aerobic reaction unit (1A) capable of receiving a treatment liquid which is divided by the anaerobic reaction unit (4), capable of receiving a treatment liquid from the aerobic unit (6), and capable of causing the content liquid to be in anoxic or Carrying out the reaction under aeration conditions;
  • a first sequencing batch unit (1) capable of accepting a supernatant from the mud water separation unit (2), capable of receiving a treatment liquid from the first aerobic/aerobic reaction unit (1A), and capable of making the content liquid Performing or precipitating water under oxygen or aeration or standing conditions;
  • a second aerobic/aerobic reaction unit (7A) capable of accepting a treatment liquid which is divided by the anaerobic reaction unit (4), capable of receiving a treatment liquid from the aerobic unit (6), and capable of causing the content liquid to be in anoxic or Carrying out the reaction under aeration conditions;
  • a second sequencing unit (7) capable of accepting a supernatant from the mud-water separation unit (2), capable of receiving a treatment liquid from the second aerobic/aerobic reaction unit (1A), and capable of making the content liquid Performing or precipitating water under oxygen or aeration or standing conditions;
  • a muddy water separation unit (2) capable of accepting treatment liquid and/or sedimented sediment from the first sequencing batch unit (1) and the second sequencing batch unit (7), and capable of receiving the bottom of the treatment liquid and/or the sedimentation liquid
  • the supernatant and the sediment are separated from the mud; and, the pre-anoxic unit (3), which can accept the sediment from the mud-water separation unit (2), and allows the sediment to react under anoxic conditions.
  • the anaerobic reaction unit (4), the first anoxic reaction unit (5), the first sequencing batch unit (1), and the second sequencing batch unit ( 7), the pre-oxygenation unit (3), the second anoxic reaction unit (5A), the first deficient/aerobic reaction unit (1A) and the second deficient/aerobic reaction unit (7A) are provided with a stirring device.
  • the aerobic unit (6), the first sequencing batch unit (1), the second sequencing batch unit (7), and the first spent/aerobic reaction unit is provided in the (1A) and the second deficient/aerobic reaction unit (7A).
  • the first batch unit (1) and the second batch unit (7) have discharges discharged to the outside of the modified batch batch reactor. Device.
  • one of the first batch unit (1) and the second batch unit (7) causes the content liquid to be in anoxic or aerated or allowed
  • the other is allowed to precipitate water.
  • one of the first sequencing batch unit (1) and the second sequencing batch unit (7) causes the content liquid to be sequentially reacted under anoxic, aerated, and standing conditions, and the other is to precipitate the content liquid. Water.
  • the first spent/aerobic reaction unit (1A) and the second spent/aerobic reaction unit (7A) are subjected to accepting batch reactions from modified batches.
  • the first anoxic reaction unit (5) is capable of accepting a treatment liquid from the aerobic unit (6).
  • the first spent/aerobic reaction unit (1A) and the second spent/aerobic reaction unit (7A) are capable of causing the content liquid to be under anoxic conditions
  • the content liquid can also be reacted under aeration conditions.
  • the first spent/aerobic reaction unit (1A) and the second spent/aerobic reaction unit (7A) are only capable of causing the content liquid to be in anoxic The reaction is carried out under the conditions.
  • the improved batch batch reactor of the first aspect of the invention is a one-cell 10-unit structure.
  • the anaerobic reaction unit (4), the first anoxic reaction unit (5), the second anoxic reaction unit (5A) and/or the aerobic unit (6) contains a filler.
  • the invention provides a method of treating raw water containing organic matter, comprising:
  • the treatment liquid obtained in the step (4) is optionally mixed with the treatment liquid obtained in the step (1), and then reacted under anoxic conditions;
  • a part of the treatment liquid is taken in the step (6) and/or (7) and/or a partially precipitated sediment is taken in the step (8), and the supernatant and the sediment are separated, wherein the sediment is optionally boring
  • the reaction is carried out in the step (1) after the reaction under oxygen.
  • the process of the second aspect of the invention is carried out by the improved batch batch reactor of the first aspect of the invention, wherein one of the first batch unit (1) and the second batch unit (7) is subjected to the step (6) At the time of (7) and (8), the other step (9).
  • the supernatant obtained by the separation is circulated to the treatment liquid of the steps (2), (3), (4), (6) and/or (7).
  • a first aspect of the invention provides an improved sequential batch reactor comprising an anaerobic reaction unit, a first anoxic reaction unit, a mud water separation unit, an aerobic unit, a first sequencing batch unit, a second sequencing batch unit, a pre-anoxic unit, a second anoxic reaction unit, a first deficient/aerobic reaction unit, and a second deficient/aerobic reaction unit.
  • an improved sequential batch reactor is also referred to as an improved sequential batch reactor comprising at least two sequencing batch units.
  • the raw water flows through the anaerobic reaction unit, the first anoxic reaction unit, the aerobic unit, the first spent/aerobic reaction unit, and the first sequencing unit, and then flows into the mud-water separation.
  • the unit is separated into a supernatant and a sediment, wherein the sediment is sent to the anaerobic reaction unit through the pre-anoxic unit, and the supernatant is directed to the first anoxic reaction unit, the second anoxic reaction unit, the aerobic unit or the sequence according to the water quality.
  • the contents of the first (two) sequencing batch unit can also perform multiple stages of anoxic and aeration reactions, ie repeated in hypoxia and
  • the reaction under aeration conditions is carried out 2 times, 3 times or more, and then the reaction is carried out under static conditions, such as under the conditions of hypoxia, aeration, anoxic, aeration and standing.
  • a unit refers to a chamber, pool (i.e., an open pool) or a tank that can perform the corresponding functions independently.
  • hypoxia refers to not contacting additional air other than the atmosphere, such as no aeration, so that the content of the unit cell is subjected to anoxic reaction, including facultative bacteria (eg, denitrifying bacteria).
  • facultative bacteria eg, denitrifying bacteria
  • the anoxic (reaction) unit may be a tank that does not have an aeration function, preferably a substantially closed chamber or tank.
  • the anaerobic reaction unit can have substantially the same structure as the anoxic reaction unit, except that it has the function of not contacting the additional air other than the atmosphere (for example, without aeration), and avoiding the nitrate-containing to the utmost extent.
  • the inflow of the treatment liquid is a chamber, tank, or tank that has the function of introducing additional air or oxygen (usually having an aeration function), thereby allowing the content liquid to undergo an aerobic reaction therein, including nitrifying bacteria (eg, Nitrification of nitroxanubicin and nitrobacteria, and a greater amount of absorption of phosphate by phosphorus-rich bacteria.
  • nitrifying bacteria eg, Nitrification of nitroxanubicin and nitrobacteria, and a greater amount of absorption of phosphate by phosphorus-rich bacteria.
  • Microorganisms involved in hypoxia and aerobic reactions are usually present in the slurry of sewage and gradually increase and stabilize with the maintenance of anoxic and aerobic environments, sufficient to complete the hypoxia and aerobic reactions of the corresponding units, generally without the need for additional microbes.
  • the exemplary operation of the modified batch batch reactor refers to the operation of the microbial stable reaction, rather than the extreme case of microbial deficiency at the initial stage of equipment input.
  • the muddy water separation unit is also referred to as a separation unit, and the sediment and the supernatant are usually separated by gravity, and the sediment can be transported to the pre-anoxic unit through the pipeline, but in the present invention, the mud-water separation unit and the pre-deficient are preferred.
  • the oxygen units are adjacent and have a common slab wall that communicates at the bottom of the common slab wall, preferably the bottom portion is inclined by the mud water separation unit to the pre-anoxic unit so that the sediment in the mud-water separation unit is deposited into the pre-anoxic unit.
  • the mud-water separation unit is disposed at a higher position, and the top height is higher than the other units, so that the pipeline extending from the top or higher than the upper portion of the other unit can directly distribute the supernatant by using the height difference without a pump; and other units The height can be flush.
  • a sequencing batch unit refers to a chamber, tank or tank that can perform different reactions (eg, anoxic reaction and aerobic reaction) at different time periods, preferably a substantially closed chamber or tank. And with an aeration device therein, an aerobic reaction is performed during aeration, and an anoxic reaction is performed when aeration is stopped.
  • the spent/aerobic reaction unit is preferably a substantially closed chamber, tank or tank substantially similar to the sequencing unit and has an aeration device therein, but may also be capable of performing only anoxic (reaction) units and aerobic (reaction) A single-function unit of one of the units.
  • the aerobic/aerobic reaction unit is only an anoxic (reaction) unit, which does not have an aeration function, and is also sufficient for effective treatment of sewage having a low carbon to nitrogen ratio; for example, a lack/aerobic reaction unit It is only an aerobic (reaction) unit, which can be regarded as the derivation or expansion of aerobic units.
  • the existing one-cell six-chamber modified batch batch reactor is sufficient for effective treatment of sewage with high carbon to nitrogen ratio.
  • the receiving liquid or slurry can be achieved through a line or nozzle.
  • the pipeline is usually used for the transportation between two separate units, and the nozzle is used for the transportation between two units adjacent to each other (ie, the common wall).
  • Valves can be placed on both the line and the nozzle to control opening and closing and flow.
  • Pumps can be placed on the pipeline to lift liquid or mud, or to increase the speed of delivery.
  • the pump may preferably be of adjustable power, such as with a frequency converter, to regulate the flow.
  • raw water refers to sewage containing organic matter (eg, urban domestic sewage) in a narrow sense, that is, sewage that is initially clarified or filtered to avoid extremely high mixed suspended solids concentration (MLSS).
  • the typical concentration of MLSS in raw water is from 2,000 to 4,500 mg/L, preferably from 2,500 to 3,500 mg/L, more preferably from 3,000 to 4,000 mg/L.
  • the typical concentration of the treatment liquid in each unit of the improved batch batch reactor of the present invention is usually also from 2,000 to 4,500 mg/L, preferably from 2,500 to 3,500 mg/L. More preferably, it is 3000-4000 mg / L.
  • first and second are merely units that distinguish the structures or functions that are the same or similar, and are not intended to define the structure or function of the respective units themselves.
  • two anoxic reaction units that is, a first anoxic reaction unit and a second anoxic reaction unit are disposed in series, and they may have the same structure, and are all functions for performing an anoxic reaction of the content liquid thereof.
  • the present inventors have found that for a sewage having a low carbon to nitrogen ratio, it is necessary to provide two anoxic reaction units in series after the anaerobic reaction unit in the modified batch batch reactor, and the raw water is only anaerobic.
  • the excess organic carbon remaining in the reaction unit is denitrified in the first anoxic reaction unit with the concentrated and/or refluxed supernatant and/or treatment liquid containing the high concentration of nitrate, and the reaction can be maintained at a higher rate.
  • relatively little accepted organic carbon and the sub-high concentration of nitrate received and/or distributed are denitrified in the second anoxic reaction unit, and the reaction rate is correspondingly low, so the two anoxic reaction units connected in series can not only Slow down the short-flow phenomenon in the reaction tank, and make full use of the limited organic carbon source in the raw water, reduce its oxidative degradation to the aerobic unit, and improve the efficiency of the denitrification reaction.
  • the first anoxic reaction unit is capable of accepting a treatment liquid from the aerobic unit.
  • the unit capable of performing the anaerobic/anoxic reaction function is preferably provided with a stirring device, thereby improving the corresponding reaction efficiency.
  • a stirring device for example, an anaerobic reaction unit, a first anoxic reaction unit, a first sequencing batch unit, a second sequencing batch unit, a pre-anoxic unit, a second anoxic reaction unit, a first deficiency/aerobic reaction unit, and a second deficiency / Aerobic reaction unit with a stirring device.
  • a unit capable of performing an aerobic reaction function such as an aerobic unit, a first sequencing batch unit, a second sequencing batch unit, a first absence/aerobic reaction unit, and a second absence/aerobic reaction unit, with aeration Device.
  • the sequencing unit has a discharge device that discharges the sludge to the outside of the modified batch batch reactor, such as a line or nozzle with a sludge pump to avoid excessive sediment deposition.
  • the batch unit may be provided with a water purifier for discharging water, but it is preferable to provide an air outlet water for discharging water.
  • a baffle is arranged at the bottom of the sequencing unit, so that when the water is precipitated, the water is filtered through the sediment. The clarification is then carried out through the air effluent from the upper part to further improve the water quality.
  • a sequencing batch unit When a sequencing batch unit performs precipitation of water, another sequencing batch unit is sequentially reacted under anoxic, aerated and static conditions, wherein the anoxic reaction is carried out without opening the stirring device without opening the aeration device.
  • the aeration reaction is carried out with the aeration device turned on, and the static reaction is carried out with the agitation device and the aeration device turned off.
  • the mud-water separation unit is connected by a pipeline batch unit with a pump, preferably in communication with the bottom or lower portion of the sequencing batch unit, for receiving the treatment liquid and/or the precipitated sediment from the sequencing batch unit.
  • the treatment liquid is accepted, and when it is allowed to stand, it is a precipitated sediment which is much higher in mud content than the treatment liquid in order to recover the microorganisms therein.
  • the improved batch batch reactor of the first aspect of the invention may also be provided with an additional carbon source receiving device.
  • an additional carbon source receiving device the inventors believe that any unit capable of performing the anaerobic/anoxic reaction function can accept an additional carbon source, the inventors have found that it has been found to be more beneficial to be placed on the spent/aerobic reaction unit.
  • a filler may be included in each unit to facilitate the growth of microorganisms on it.
  • the filler may be irregularly shaped, spherical or cubic.
  • the filler is made of sponge or polyurethane.
  • the filler is a porous filler suitable for the growth of microorganisms attached to surfaces and at various depths inside.
  • each unit may contain a filler, the inventors have found that it is particularly advantageous to include a filler in the anaerobic reaction unit, the first anoxic reaction unit, the second anoxic reaction unit, and the aerobic unit, especially at low water temperatures.
  • the anaerobic reaction unit, the first anoxic reaction unit, the second anoxic reaction unit, and/or the aerobic unit contain a filler. More preferably, the diameter or the longest side length of the packing is greater than the pore size of the screen on the line or nozzle that communicates with the respective unit for stable retention within the respective unit.
  • the improved batch batch reactor of the first aspect of the invention is preferably an integrated single tank, such as a pool of 10 unit structures.
  • the preferred distribution structure of each unit is shown in FIG.
  • one end of the single tank is divided into three columns, wherein the middle includes a pre-anoxic unit, a mud-water separation unit, an anaerobic reaction unit, a first anoxic reaction unit and a second anoxic reaction unit; the middle side includes a first sequencing batch unit and a first missing/aerobic reaction unit; and the other side includes a second sequencing batch unit and a second missing/aerobic reaction unit in sequence; the other end is provided with an aerobic unit, which is the first missing/good
  • Adjacent units are preferably in close proximity, such as a common slab wall, and if required to communicate, adjacent units may be connected by a nozzle on the common slab.
  • the raw water/treatment liquid can be used to compensate for the lack of volume in the reaction and residence time of a certain unit, there has been little research on the volume of each unit in the prior art.
  • the present inventors have found that for sewage in southern China, especially sewage having a relatively low carbon to nitrogen ratio, the pre-oxygen unit, the mud-water separation unit, and the anaerobic reaction in the improved batch batch reactor of the first aspect of the invention are preferred.
  • first anoxic reaction unit first anoxic reaction unit, second anoxic reaction unit, aerobic unit, first sequencing unit, first absence/aerobic reaction unit 1A, second sequencing unit, and second absence/aerobic reaction unit
  • the volume is small, small, medium, medium, medium, maximum, large, medium, large and medium, and such volume ratio can maximize the efficient biological treatment.
  • the volume ratio of the reaction unit 1A, the second sequencing unit and the second spent/aerobic reaction unit may be 0.2 to 0.8: 0.2 to 0.8: 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5: 2 to 8: 1.5 to 4.5.
  • a second aspect of the invention provides a process for treating raw water containing organic matter, preferably by an improved batch batch reactor of the first aspect of the invention.
  • the method of the second aspect of the invention comprises:
  • step (2) reacting the treatment liquid obtained in the step (1) under anoxic conditions, preferably the step is carried out in the first anoxic reaction unit;
  • step (3) reacting the treatment liquid obtained in the step (2) under anoxic conditions, preferably the step is carried out in the second anoxic reaction unit;
  • step (3) reacting the treatment liquid obtained in the step (3) under aeration conditions, preferably the step is carried out in an aerobic unit;
  • the treatment liquid obtained in the step (4) is optionally mixed with the treatment liquid obtained in the step (1), and then reacted under anoxic conditions, preferably in the absence/aerobic reaction unit (especially the first In the absence/aerobic reaction unit);
  • step (7) reacting the treatment liquid obtained in the step (6) under aeration conditions, preferably the step is carried out in a sequencing batch unit (especially the first sequential batch unit);
  • the treatment liquid obtained in the step (7) is allowed to stand for precipitation, preferably the step is carried out in the sequencing batch unit (especially the first sequencing batch unit);
  • step (9) precipitating the treatment liquid obtained in the step (8) out of water preferably the step is carried out in a sequencing batch unit (especially a second sequencing batch unit),
  • a portion of the treatment liquid is taken in steps (6) and/or (7) and/or a partially precipitated sediment is taken in step (8), preferably in a mud-water separation unit, to obtain a supernatant and a sediment.
  • the bottom sludge is optionally recycled to the step (1) after the reaction is carried out under anaerobic conditions (preferably in a pre-oxane unit).
  • the treatment liquid obtained in the step (4) is directly reacted under anoxic conditions without being mixed with the treatment liquid obtained in the step (1) (the treatment liquid obtained in the step (1) is not accepted).
  • the treatment liquid obtained in the step (4) (receiving the treatment liquid obtained in the step (1)) is mixed with the treatment liquid obtained in the step (1), and then the reaction is carried out under anoxic conditions.
  • the sediment is directly circulated for use in the step (1) (without performing the anaerobic reaction), or the bottom sludge is subjected to the reaction under anaerobic conditions and then recycled for the step.
  • (1) Medium After separating the supernatant and the sediment, the sediment is directly circulated for use in the step (1) (without performing the anaerobic reaction), or the bottom sludge is subjected to the reaction under anaerobic conditions and then recycled for the step.
  • the first deficit/aerobic reaction unit, the first sequencing batch unit and the second spent/aerobic reaction unit, and the second sequencing batch unit can exchange the steps performed thereby, thereby performing a loop process.
  • the other proceeds to step (9).
  • the supernatant obtained by the separation may be added to the treatment liquid of the step (9) to precipitate the water, and in most cases, it may be further processed, including the step of adding to the steps (2), (3), (4), 6) and / or (7) in the treatment liquid.
  • the reaction in the step (4) it is also preferred to carry out the reaction in the step (4) by taking a part of the treatment liquid and adding it to the treatment liquid of the step (2) under anoxic conditions. After this occurs, in the step (5), in the case where an additional carbon source is added, the treatment liquid obtained in the step (4) is optionally subjected to an reaction under anoxic conditions after being mixed with the raw water.
  • the invention has the beneficial effects that the improved batch batch reactor of the invention can remove phosphorus and nitrogen from sewage, in particular, can increase the total nitrogen removal rate by about 25% relative to the existing modified batch batch reactor.
  • the improved batch batch reactor of the present invention has sufficient flexibility and can also be fully It can replace the function of the existing improved batch batch reactor, and can extend the original production line, materials and components, and is easy to upgrade.
  • Figure 1 is a view showing the arrangement and connection of the units in the 10-unit modified batch batch reactor of the present invention, wherein the arrows point to the flow direction of the raw water, the treatment liquid or the sediment; wherein Figs. 1A and 1B respectively show simultaneous operation. The flow direction of two sequential batch units, where the completely closed pipeline is omitted.
  • Figure 2 shows the distribution of the units of the 10-unit modified batch batch reactor of the present invention in an integrated structure of a single tank (one tank).
  • FIG. 2 The distributed structure of the integrated single-casing of the 10-unit modified batch batch reactor of the present invention is shown in FIG. 2, wherein each unit is a chamber structure, and the pipeline and nozzle connection forms are as shown in FIG. Shown.
  • the middle of the single tank includes a pre-oxygen unit 3, a mud-water separation unit 2, an anaerobic reaction unit 4, a first anoxic reaction unit 5, and a second anoxic reaction unit 5A, wherein the bottom of the mud-water separation unit 2 is pre-deficient
  • the oxygen unit 3 is inclined and connected so that the sediment in the mud water separation unit 2 is deposited to the pre-anoxic unit 3;
  • the anaerobic reaction unit 4 is connected to an external line capable of passing into the raw water, the anaerobic reaction unit 4 and the first anoxic reaction unit 5 communicating through a nozzle on a common slab;
  • the first anoxic reaction unit 5 and the second anoxic reaction unit 5A are communicated through a nozzle on a common slab;
  • the muddy water separation unit 2 and the anaerobic reaction unit 4 are shared a wall, but not connected;
  • the pre-oxygen unit 3 is connected to the anaerobic reaction unit 4 through a line with a
  • the single tank side includes a first sequencing batch unit 1 and a first spent/aerobic reaction unit 1A in sequence, wherein the first sequencing batch unit 1 and the first spent/aerobic reaction unit 1A pass through a tube on a common wall
  • the first batch unit 1 is provided with an air outlet port, and the outlet of the air outlet port is provided with a line communicating with the outside of the single box body to discharge the treated water, and the sludge pump is also passed through
  • the line is connected to the outside of the single tank to be discharged when the sediment is excessively deposited;
  • the first spent/aerobic reaction unit 1A is connected to the external line on the anaerobic reaction unit 4 or its vicinity by a line optionally having a pump
  • the first deficient/aerobic reaction unit 1A also has an openable and closed skylight, in addition to facilitating observation of the sampling, it is also possible to input a carbon source or the like into it when necessary;
  • the other side of the single tank symmetrically includes a second sequencing batch unit 7 and a second aerobic/oxygen reaction unit 7A, respectively, having a structure corresponding to the first sequencing batch unit 1 and the first missing/aerobic reaction unit 1A, respectively. the same.
  • the aerobic unit 6 sharing the slab with the first vacancy/aerobic reaction unit 1A, the second anoxic reaction unit 5A and the second anoxia/oxygen reaction unit 7A passes through the nozzles on the common slab wall and the first deficiencies respectively / aerobic reaction unit 1A, second anoxic reaction unit 5A and second aerobic reaction unit 7A are connected; aerobic unit 6 is preferably connected to the first anoxic reaction unit 5 through a pipeline with a pump (not shown) Shown) to transport the treated water having a higher nitrate content in the aerobic unit 6 to the first anoxic reaction unit 5 (and further into the second anoxic reaction unit 5A) to provide nitrate for the anoxic unit for denitrification At the same time, it promotes the phosphorus adsorption of polyphosphate bacteria in the anoxic unit, which is beneficial for the phosphorus removal of sewage with higher phosphorus content.
  • the aerobic unit 6 and the muddy water separation unit 2 may be provided in an open form, but are preferably not provided in an open form; the muddy water separation unit 2 passes through a line with a pump and a first sequencing batch unit 1 and a second sequencing batch unit 7, respectively.
  • the mud, the treatment liquid and the sedimented sediment are separated into the sediment and the supernatant by gravity in the mud water separation unit 2; the top of the mud water separation unit 2 is higher than the other units, and the mud water separation unit 2 passes through the pipeline respectively (preferably from the top thereof or The upper extended pipeline, so that there may be no pump but with a valve) respectively with the first anoxic reaction unit 5, the second anoxic reaction unit 5A, the aerobic unit 6, the first sequencing batch unit 1 and the second sequencing batch Unit 7 to transport the supernatant to the corresponding unit, wherein if the water quality of the supernatant has passed, it is transported to the sequencing unit that is precipitating the water; the nitrate content is extremely high (eg NOx>15 mg/L), then Transported to the first anoxic reaction unit 5 If the nitrate
  • Pre-oxygenation unit 3 mud water separation unit 2, anaerobic reaction unit 4, first anoxic reaction unit 5, second anoxic reaction unit 5A, aerobic unit 6, first sequencing unit 1, first lack/good
  • the approximate volume ratio of the oxygen reaction unit 1A, the second sequencing unit 7 and the second absence/aerobic reaction unit 7A is 0.5:0.5:1:1:1:5:3:1:3:1.
  • a porous filler may be added to the anaerobic reaction unit, the first anoxic reaction unit, the second anoxic reaction unit, and the aerobic unit.
  • Valves can be set for each line and nozzle to control opening and closing and flow; each pump (such as sludge pump) can be adjustable in power, such as with a frequency converter to regulate flow; each unit can be set On-line monitors (eg, redox potentiometers), detecting nitrate concentrations, etc., especially by various pumps and/or valves, especially controlling the nitrate nitrogen in the pre-anoxic unit 3 at 0.5-1.5 mg/L.
  • On-line monitors eg, redox potentiometers
  • detecting nitrate concentrations, etc. especially by various pumps and/or valves, especially controlling the nitrate nitrogen in the pre-anoxic unit 3 at 0.5-1.5 mg/L.
  • the single box structure of the embodiment 1 has a length of 65.3 meters, a width of 48.8 meters, a height of 6m/8m meters, a daily (24 hours) flow rate (handling amount) of 25000 m3, and carbon in the Jiangsu region from December to January.
  • the wastewater has a nitrogen ratio of about 50% lower than that of the typical China (North) region (the BOD5/TN is 2.1, which is treated in the prior art modified batch batch reactor, and an additional carbon source must be used to qualify the effluent water quality)
  • a cycle operation of time allocation as shown in Table 1 was carried out, during which no carbon source agent was charged.
  • the water quality of the sewage before and after the above treatment is shown in Table 2.
  • the results show that the 10-unit modified batch batch reactor of the present invention can effectively treat sewage with low carbon to nitrogen ratio, and is currently an ideal sewage biological phosphorus and nitrogen removal equipment. .
  • the single-box structure of the embodiment 1 has a length of 88.3 meters, a width of 66.6 meters, a height of 8 m/9 m meters, a daily (24 hours) flow rate (handling amount) of 62,500 m 3 , and a carbon nitrogen in January in Hunan. It is about 25% lower than the sewage in typical China (North) region (including BOD5/TN of 2.88, which is treated in the prior art modified batch batch reactor, and additional carbon source must be put in order to qualify the effluent quality)
  • the cycle of time allocation as shown in Table 1 does not involve any carbon source reagents.
  • the water quality of the sewage before and after the above treatment is shown in Table 2.
  • the results show that the 10-unit modified batch batch reactor of the present invention can effectively treat sewage with low carbon to nitrogen ratio, and is currently an ideal sewage biological phosphorus and nitrogen removal equipment. .

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

L'invention concerne un réacteur discontinu à séquençage modifié à unités multiples. Le réacteur discontinu à séquençage modifié à unités multiples comprend une unité de réaction anaérobie (4), une première unité de réaction anoxique (5), une unité de séparation boue-eau (2), une unité aérobie (6), une première unité de lot de séquençage (1) et une seconde unité discontinue de séquençage (7), et comprend également une unité pré-anoxique (3), une seconde unité de réaction anoxique (5A), une première unité de réaction anoxique/aérobie (1A) et une seconde unité de réaction anoxique/aérobie (7A). Le réacteur discontinu à séquençage modifié peut utiliser totalement une source de carbone d'eau brute, peut améliorer le taux d'élimination total d'azote, est particulièrement applicable au traitement des eaux usées d'un faible rapport carbone/azote, et est également applicable au traitement des eaux usées d'un rapport carbone/azote élevé. L'invention concerne également un procédé de traitement de l'eau brute contenant une matière organique à l'aide d'un réacteur discontinu à séquençage modifié à unités multiples.
PCT/CN2018/077168 2017-03-02 2018-02-25 Réacteur discontinu à séquençage modifié à unités multiples et ses applications Ceased WO2018157766A1 (fr)

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CN109678297B (zh) * 2019-01-16 2021-09-14 何江涛 序批分段式生物膜法污水处理系统和污水处理方法
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