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WO2016082007A1 - Procédé permettant la reconstruction et l'optimisation de l'étage des boues activées d'installations de traitement d'eaux usées avec une biomasse en suspension - Google Patents

Procédé permettant la reconstruction et l'optimisation de l'étage des boues activées d'installations de traitement d'eaux usées avec une biomasse en suspension Download PDF

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Publication number
WO2016082007A1
WO2016082007A1 PCT/BG2014/000042 BG2014000042W WO2016082007A1 WO 2016082007 A1 WO2016082007 A1 WO 2016082007A1 BG 2014000042 W BG2014000042 W BG 2014000042W WO 2016082007 A1 WO2016082007 A1 WO 2016082007A1
Authority
WO
WIPO (PCT)
Prior art keywords
biomass
waste water
activated sludge
respiration
optimization
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/BG2014/000042
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English (en)
Inventor
Krasimira Svetoslavova KUZMANOVA
Ivan Dimitrov SEKOULOV
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Private Institute For Water Technologies Ltd
Original Assignee
Private Institute For Water Technologies Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Private Institute For Water Technologies Ltd filed Critical Private Institute For Water Technologies Ltd
Priority to PCT/BG2014/000042 priority Critical patent/WO2016082007A1/fr
Publication of WO2016082007A1 publication Critical patent/WO2016082007A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C02F3/006—Regulation methods for biological treatment
    • 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
    • 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
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/15—N03-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/18—PO4-P
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • 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 relates to a method for reconstruction and optimization of the activated sludge stage of municipal and industrial waste water treatment plants (WWTPs) with one suspended biomass, discharged into criticallysensitive areas", and is applicable to the construction of new treatment plants in different infrastructural systems, as well as to the optimization of the already existing ones.
  • WWTPs waste water treatment plants
  • TKN ⁇ 10 mg/l ⁇ [ 2 (mg/l) N-N org + 3 (mg/l) N-NH 4 + + 5 (mg/l) N-
  • the discharge permits are generally issued by the respective Basin Directorate (BD) according to the current law.
  • the standards for discharge into the water bodies may diflFer from the generally accepted (enforcement of particular standards for discharge by the BD), because they also depend on the industrial water use. In that case the relevant parameters are limited as a load (kg/d), which leads to lower concentrations in the issued permits, compared to the above-mentioned standards.
  • the difficulties commonly include a non-achievement of the discharge parameters for purified waste water in the recipients, determined by the requirements of the discharge permits. This can be considered as a global problem.
  • the following circumstances can be regarded as major causes:
  • the initial design data are specific for each single WWTP and in case of enhanced requirements, as for the ergonomic areas", they are practically intransferable to another case, unless the laws of similarity are observed.
  • the currently prevailing dimensioning methods rest on semi-empirical and often subjective methods, due to the subjective acceptance of the initial dimensioning parameters from tables, or using the experience of others from the technical literature.
  • the up to date project planning is based on the maximum needed bio basin volume during the cold winter months (t ⁇ 10-12 °C), which is built of several uniform technological lines (sections), while in summertime (the volume is up to two times smaller at 20 - 25 °C) the separation of unnecessary volume parts, i.e. to put out of operation some technological lines, is recommended. That causes additional problems during the repeated start-up and commissioning of the facilities, etc.
  • the aim of the present invention is to create a method of reconstruction and optimization of the activated sludge stage (at the water line) of municipal and industrial waste water treatment plants (WWTPs), with one suspended biomass, discharged into prescribesensitive areas" by means of secure (reliable, well provided) dimensioning in the particular case, with covering the possible modes of plant operation, while low investment costs, budget-friendly electric power consumption and acceptable price per cubic meter purified water are targeted.
  • WWTPs municipal and industrial waste water treatment plants
  • the task is solved by method of reconstruction and optimization of the activated sludge stage of waste water treatment plants (WWTPs) with one suspended biomass, whereby according to the invention, the major dimensioning parameters, like:
  • the optimization of dimensioning the air blowers for the biological stage is done through determination of the necessary quantity oxygen (O 2 ), respectively air, based on the actual respiration of a real biomass (of heterotrophic and autotrophic microorganisms).
  • the dimensioning of required volumes for nitrification (NI) and denitrification (DN) in case of an activated sludge stage with one aggregate biomass is done separately.
  • the biomass necessary for the research, is created on site through the "fill & draw" method.
  • Figure 1 illustrates a WWTP "cascade type" having three sections (anaerobic, anoxy and aerobic) with or without a primary sedimentation tank and with one selector.
  • the system has one aggregate biomass for the three particular processes (biological removal of phosphorus, denitriflcation H nitrification);
  • the present patent provides a method for reconstruction and optimization of the activated sludge stage of WWTPs with one suspended biomass, discharging their purified waste waters into redesignsensitive areas", i.e. with increased requirements for the biogenic elements in the purified waste water, whereby according to the invention the determination of the major dimensioning parameters for real waste waters is done on site by means of laboratory equipment, under observance of the law of similarity.
  • the method mainly considers the removal of nitrogen.
  • the selection of the treatment scheme is of primarily importance for achieving the intended purifying ability at the WWTP outlet. Taking into account the previous practical experience (not so very long) with new WWTPs, the cascade system with three separated cascades and one aggregate biomass wins more and more recognition.
  • the specified dimensioning method is valid for process schemes, for example with bio basins cascade type (Fig.1), with separated volumes for primary denitrification, followed by nitrification, with one aggregate biomass.
  • the first step is to check the existing technological scheme / the WWTP concept, pursuant to the submitted/ existing project, as per its technology part.
  • the depicted WWTP represents a technological scheme of purification - activated sludge stage, with one aggregate biomass for the three separated processes (biological removal of phosphorus, denitrification and nitrification).
  • the bio basin is cascade type with one selector 1 and three separated sections - anaerobic 2, anoxy 3' and aerobic3", with or without primary sedimentation tank (depending on the chosen scheme for the sludge treatment).
  • the next step is to check the capability of the aggregate biomass (with heterotrophic denitrification - about 80 % of the aggregate biomass) to remove the nitrogen:
  • BSB 5 TKN o ⁇ 3,00 ⁇ 4,00, wherein:
  • the laboratory measurement is performed initially with a substrate with "genuine" waste water under concrete local conditions, whereupon a repeated measurement with addition of amonium salts (up to 20 mg/l), /ABSB and ANH 4 + . n / is performed.
  • the required biomass for planned laboratory investigations in case of a newly establishing WWTP can be taken from a similar plant, or it can be cultivated by means of the whilfill & draw" method (filling and drawing) within 3 to 4 weeks.
  • the next step includes a laboratory detennination of the specific nitrification rate, depending on the concrete temperature, specific for the WWTP, e.g. at 10-12 °C ⁇ 15 °C ⁇ 20-25 °C.
  • an exemplary laboratory stand is used, which is shown in Fig. 3 and illustrated with respective charts:
  • the next step represents a laboratory determination of the specific denitrification rate, which depends on the biomass respiration AO/A B SB and A NH 4 -N/ according to the exemplary stand in Fig.4:
  • a sludge age tjs, [d] calculation of the real waste water follows through detennination of the actual growth velocity of the nitrifying bacteria ⁇ max , [d 1 ], employing the Ahrrenius equation, respectively the loading, depending on the temperatures at different seasons and taking them into consideration during the operation;
  • the follwing known method is used in order to find the nitrification and denitrification volume:
  • M food : microorganisms
  • BOD 5 - decomposition rate B TS ,BSB-
  • BTS F : M, i.e. the biomass reproduction is depending on that ratio, which also depends on the influence of temperature;
  • Tl, T2 - the relevant waste water temperatures, °C;
  • the loading as per BSB 5 (F : M) is in ratio less than Brs ⁇ 0,10 ⁇ 0,005 (mg BSBs/kgTs-d). Since the nitrifying bacteria are determinative of the biomass reproduction of heterotrophic microorganisms, the whole dimensioning is concentrated on the nitrification by means of laboratory investigations with real waste water.
  • the next step is a determination of the volume for nitrification.
  • the following equation is used for dimensioning of the nitrification volume:
  • ⁇ ( ⁇ 3 ⁇ 4 + - ⁇ ) is the difference between the concentration of amonium ions at the WWTP inlet and outlet, respectively the inlet and outflow at ⁇ - stage for already existing WWTPs, [kg/d];
  • ⁇ is the coefficient of nitrified total nitrogen ( ⁇ 0 ), ⁇ ⁇ 80 %
  • N 0 is the total nitrogen at the WWTP inlet, which is expected to be fully nitrified (for new WWTPs);
  • TSBSB is the biomass concentration by dry matter [kg Ts /m 3 ], determined through laboratory investigations of the waste water at the WWTP inlet, or through the Nl-stage of existing WWTPs (at determined temperature, oxygen concentration, amonium ions and pH).
  • ⁇ (NO 3 " - N) is the difference between the concentration of nitrate ions at the WWTP inlet and outlet, respectively the inlet and outlet at DN-stage for already existing WWTPs [kg/d];
  • TSBSB is the biomass concentration by dry matter [kg Ts /m 3 ], determined through laboratory investigations of the waste water at the WWTP inlet, or through the DN-stage of existing WWTPs (at determined temperature, pH, etc.).
  • ⁇ D ⁇ is the denitrification rate (DN) [kg N o3-N/kgTs d] - from laboratory investigations, at different temperatures, specific for the actual WWTP;
  • DN denitrification rate
  • a o [mg/l.h] is used, while the same is divided by an equivalent of (NO 3 ) for oxygen - 2,3.
  • VDN A O .2,3 [mg N0 3- / grs-hj or [kgN03 ⁇ -N / kgrs- d]
  • V BB V Ni + V DN , [m 3 ]
  • the next step is to determine the quantity of the surpluse activated sludge (OSd)
  • VBB total bio basin volume [m 3 ]
  • a training course for the operating personnel follows, e.g. in case of eventual change of the waste water temperature and measurement of TSBB (for example each month), what a quantity surpluse activated sludgeis required to be taken out (OS d , m 3 /d), how much and what a quantity of oxygen respectively air is required for the nitrification area etc.
  • nitrifying bacteria heterotrophs.
  • the required parameters are detennined according to the present optimization method, while the required biomass for laboratory investigations is produced on site by means of the "fill & draw” method, in accordance with the laboratory test stand, as shown in Fig. 5.
  • One cylinder with a capacity of 2 ⁇ 5 liters is filled with raw waste water from the respective residential area (the main inlet sewer collector), while the waste water in the cylinder is aerated steadily over 24 hours (O2 > 3 ⁇ 6 mg/l), whereupon it precipitates for about 0,5 h. Every day after the precipitation about 50 % of the waste water is discharged and the remaining 50 % are supplemented with raw water.
  • the creation of own biomass may take place at different temperatures within 3 to 4 weeks, whereupon it is proceeded according to the present method.
  • the provided method for optimization of WWTPs for conformsensitive areas helps to a great extent to avoid the subjective acceptance from the hterature of missing data, which rarely match the concrete climate and other local conditions for WWTPs. Thus the erection of a prototype pilot facility with one-year investigation period is avoided. Each WWTP is particular and the designer can take it into consideration.
  • the preferred system for nitrogen removal from the waste water is the cascade one, with separated bio basins for nitrification and denitrification.
  • TSBSB 2,5 [kg/m 3 ] - from laboratory investigations.
  • ⁇ max15 0 ' 45 ( i/ l ) ' specific growth rate, known and standardised for pure cultures from Nitrosomonas at 15 °C;

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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)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

L'invention concerne un procédé permettant la reconstruction et l'optimisation de l'étage des boues activées d'installations de traitement d'eaux usées (WWTP), avec une biomasse en suspension. L'invention concerne un procédé permettant la reconstruction et l'optimisation d'installations de traitement d'eaux usées, la détermination des principaux paramètres de dimensionnement pour les eaux usées réelles, comme la respiration de la biomasse d'hétérotrophes, la respiration de la biomasse des bactéries nitrifiantes, le taux de nitrification spécifique, en fonction de la température définie, le taux de dénitrification spécifique, en fonction de la respiration de la biomasse, étant réalisée sur site au moyen d'un équipement de laboratoire, lors de l'observation d'une loi de similarité, tandis que la compensation de la variation de l'influence de la température sur les volumes du bassin biologique à des saisons différentes est effectuée par le calcul de l'âge des boues des eaux usées réelles et la variation de la concentration de la biomasse au sein de limites déterminées, sous maintien d'un âge constant de la biomasse, et en prenant en considération la concentration de la biomasse dans le bassin biologique en fonction des changements de température des eaux usées dans la description, et l'optimisation du dimensionnement des soufflantes d'air pour l'étage des boues activées est effectuée par la détermination de la quantité d'oxygène requise, sur la base de la respiration réelle de la biomasse réelle.
PCT/BG2014/000042 2014-11-28 2014-11-28 Procédé permettant la reconstruction et l'optimisation de l'étage des boues activées d'installations de traitement d'eaux usées avec une biomasse en suspension Ceased WO2016082007A1 (fr)

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PCT/BG2014/000042 WO2016082007A1 (fr) 2014-11-28 2014-11-28 Procédé permettant la reconstruction et l'optimisation de l'étage des boues activées d'installations de traitement d'eaux usées avec une biomasse en suspension

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PCT/BG2014/000042 WO2016082007A1 (fr) 2014-11-28 2014-11-28 Procédé permettant la reconstruction et l'optimisation de l'étage des boues activées d'installations de traitement d'eaux usées avec une biomasse en suspension

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109239142A (zh) * 2018-09-14 2019-01-18 华东师范大学 一种沉积物反硝化速率的测定方法及测定装置
CN109553247A (zh) * 2018-12-28 2019-04-02 中国人民大学 一种基于异养硝化过程实现厌氧氨氧化的方法
CN110579567A (zh) * 2019-09-06 2019-12-17 西安建筑科技大学 一种基于呼吸图谱评估活性污泥反硝化效果的方法
CN111899818A (zh) * 2020-07-28 2020-11-06 王艳捷 一种智慧型污水生物处理活性污泥监测技术及方法
CN111985389A (zh) * 2020-08-18 2020-11-24 中国电建集团成都勘测设计研究院有限公司 一种基于流域属性距离的流域相似判别方法

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WO1997000832A1 (fr) * 1995-06-22 1997-01-09 Bisasco Pty. Limited Traitement de controle des eaux usees par surveillance des taux de consommation d'oxygene
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JP2005279351A (ja) * 2004-03-29 2005-10-13 Hitachi Ltd 下水処理方法，下水処理制御システム、及び下水処理設備
US20080029454A1 (en) * 2006-08-01 2008-02-07 University Of South Florida Carbon Dioxide Stimulation of Nitrification in Activated Sludge Reactors
US20130334112A1 (en) * 2010-02-17 2013-12-19 University Of South Florida System for solids retention time uncoupling by selective wasting of sludge

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US5266200A (en) * 1991-04-17 1993-11-30 Reid John H Sequence continuous reaction in complete mix activated sludge systems
WO1997000832A1 (fr) * 1995-06-22 1997-01-09 Bisasco Pty. Limited Traitement de controle des eaux usees par surveillance des taux de consommation d'oxygene
GB2329634A (en) * 1997-09-30 1999-03-31 Aw Creative Technologies Ltd Activated sludge treatment plant
US20020148779A1 (en) * 2000-06-13 2002-10-17 Shieh Wen K. Methods and apparatus for biological treatment of aqueous waste
JP2005279351A (ja) * 2004-03-29 2005-10-13 Hitachi Ltd 下水処理方法，下水処理制御システム、及び下水処理設備
US20080029454A1 (en) * 2006-08-01 2008-02-07 University Of South Florida Carbon Dioxide Stimulation of Nitrification in Activated Sludge Reactors
US20130334112A1 (en) * 2010-02-17 2013-12-19 University Of South Florida System for solids retention time uncoupling by selective wasting of sludge

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109239142A (zh) * 2018-09-14 2019-01-18 华东师范大学 一种沉积物反硝化速率的测定方法及测定装置
CN109239142B (zh) * 2018-09-14 2020-07-28 华东师范大学 一种沉积物反硝化速率的测定方法及测定装置
CN109553247A (zh) * 2018-12-28 2019-04-02 中国人民大学 一种基于异养硝化过程实现厌氧氨氧化的方法
CN109553247B (zh) * 2018-12-28 2021-08-31 中国人民大学 一种基于异养硝化过程实现厌氧氨氧化的方法
CN110579567A (zh) * 2019-09-06 2019-12-17 西安建筑科技大学 一种基于呼吸图谱评估活性污泥反硝化效果的方法
CN111899818A (zh) * 2020-07-28 2020-11-06 王艳捷 一种智慧型污水生物处理活性污泥监测技术及方法
CN111985389A (zh) * 2020-08-18 2020-11-24 中国电建集团成都勘测设计研究院有限公司 一种基于流域属性距离的流域相似判别方法
CN111985389B (zh) * 2020-08-18 2023-05-16 中国电建集团成都勘测设计研究院有限公司 一种基于流域属性距离的流域相似判别方法

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