KR20190000157A - The method and apparatus for treatment of livestock manure, livestock wastewater or livestock washing water using ceramic membrane - Google Patents

Abstract

A method and an apparatus for treating livestock manure, livestock wastewater or livestock washing water using a ceramic membrane are provided. The treatment method comprises a step of performing biological treatment on livestock manure, livestock wastewater, or livestock washing water via a microorganism removing method, then filtering/concentrating the produced liquid manure or effluent using a ceramic membrane device to perform filtration, and then separating the sludge from the liquid manure, livestock wastewater, or livestock washing water, wherein the ceramic membrane has a pore size of 20-800 nm.

Description

TECHNICAL FIELD The present invention relates to a method for treating livestock manures, livestock wastewater or livestock wastewater using ceramic separation membranes, and a method and a device for treating livestock wastewater or livestock wastewater.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment method and a treatment apparatus for separating livestock manure, livestock wastewater or livestock washing water, A method of treating the washing water and a treatment apparatus.

Conventional treatment methods for livestock manure, livestock wastewater or livestock washing water include various types of physico-chemical unit treatment processes and biological treatment processes. However, the existing treatment method is composed of the processes that exclude efficient use of resources by focusing on the purification treatment efficiency of livestock manure. In addition, as the standard of discharge of livestock manure, livestock wastewater or animal husbandry washing water becomes strict, it is becoming a high-cost processing process by combining with processes which are complicated and difficult to operate and maintain in order to meet this standard. As the efficient combination of individual processes becomes difficult, the use of energy is also inefficient, and the throughput versus run time is also reduced. In addition, recycling rate is very low due to limitation of purification efficiency.

Accordingly, livestock manure, livestock wastewater or livestock wastewater can be processed through a variety of biological treatment processes, rather than a method that relies on simple purification treatments, by applying an advanced membrane process to biological treatments of various aerobic or anaerobic processes. There is a demand for an eco-friendly treatment method by recycling or discharge.

However, even if the liquid level or the treated water passes the environmental standard, there is a problem in that the eutrophication is again caused by the sludge in the liquid or the treated water after a long period of time passes.

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the cause of eutrophication by removing sludge in liquid fertilizer or treated water and to prevent the occurrence of eutrophication even when the treated liquid or treated water is stored or discharged for a long time, And to provide a method and an apparatus for treating livestock wastewater or livestock washing water.

It is to be understood, however, that the technical scope of the present invention is not limited to the above-described embodiments, but may be variously modified without departing from the technical spirit and scope of the present invention.

The method for treating livestock manure, livestock wastewater or livestock washing water using the ceramic separation membrane according to one embodiment of the present invention is characterized in that biological treatment is performed by a method of removing microorganisms from livestock manure, livestock wastewater or livestock washing water Separating / concentrating the produced liquid or discharged water using a ceramic separation membrane device to separate and process the sludge from the liquid or the effluent water, wherein the ceramic separator has a pore size of 20 nm to 800 nm.

In the process of filtering the liquid mixture using the ceramic separation membrane, a pressure greater than a predetermined level may be applied to the ceramic separation membrane, thereby separating the sludge acting as a cause of the sub-liquidation from the liquid mixture.

The apparatus for treating livestock manure, livestock wastewater or livestock washing water using the ceramic separation membrane formed using the above-described treatment method can be provided.

Other specific details of the invention are included in the detailed description and drawings.

Since the sludge is removed from the livestock produced by using the ceramic separation membrane according to the embodiments of the present invention, the method of treating livestock wastewater or livestock wastewater and the treatment apparatus using the ceramic separation membrane, the cause of eutrophication is eliminated Therefore, even if the liquid is stored or discharged for a long time, secondary eutrophication does not occur, which can help improve the environment.

However, the effects of the present invention are not limited to the above effects, and can be variously extended without departing from the spirit and scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing the production process of liquid manure;
2 is a schematic structural view of a ceramic separation membrane device according to the present invention.
3 is a schematic perspective view of a ceramic separator applied to the present invention.
4 is a schematic perspective view of a ceramic separator module according to an embodiment of the present invention.
5 is a flowchart of a method of treating livestock manure, livestock wastewater or livestock wastewater according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

In the present invention, the biological treatment is performed on the livestock manure, the livestock wastewater or the livestock washing water by the microorganism removing method, and the filtration / separation / concentration treatment of the sludge of the produced liquid or the treated water is performed using the ceramic separation membrane device It is a technical feature.

The inorganic film is a porous microcrystalline separator sintered with alumina or titania or zirconia at a very high temperature. The ceramic separator generally has an asymmetric structure with the porous supporting active membrane layer. The macroporous support ensures mechanical resistance, while the active layer is capable of microfiltration, ultrafiltration and separation of nanofiltration (up to 1 KD). The ceramic separator always operates in a crossflow mode. The turbid fluid passes through the membrane layer inside the channel at high speed. Clean liquid containing fine molecules driven by ceramic membrane transverse pressure (TMP) passes through the ceramic membrane layer vertically through the membrane, and solids and molecules larger than the ceramic membrane membrane are rejected by the retainer. Thus, the feed fluid is purified, concentrated, and purified to remove sludge from livestock manure, livestock wastewater, or livestock wastewater, which is subjected to secondary eutrophication after physicochemical unit treatment processes and biological treatment processes .

In the past, livestock manure or livestock wastewater was treated by the treatment process in the reservoir - flow control tank - anoxic tank - aerobic tank (liquefaction tank), and after spraying or dewatering, Lt; / RTI >

However, in this conventional treatment method, even if the liquid or discharged water meets the environmental standard at the time of discharge, if a long period of time elapses after the spraying or discharging, the sludge eutrophication causes odor in the river and consequently, do. In order to solve such a problem, the present invention aims at eliminating the cause of eutrophication by removing the sludge of the pot or the effluent through the filtration / concentration treatment process using the ceramic separation membrane for the liquid, the treated water and the discharged water. When the sludge is removed from the liquid or discharged water, the eutrophication phenomenon does not occur even when the liquid is stored or discharged for a long period of time.

First, the process of forming the liquid or discharged water before the filtering process using the ceramic separator according to the present invention will be described and the present invention will be described in (3).

The liquid waste water is subjected to a first treatment using (1) a scum processor and a centrifugal dehydrator, (2) a second treatment of the biological process, (3) filtration and precipitation by a separation process, And the advanced treatment (third treatment).

Referring to FIG. 1, the first treatment step is a step of introducing a livestock manure, livestock wastewater or livestock washing water into a treatment plant (S1), and then treating the impurities processor S2 and the centrifugal dehydrator (Step S3).

The second treatment step is a biological treatment (S4) for livestock manure, livestock wastewater or livestock washing water that has undergone the first treatment step.

In the altitude treatment (third treatment) step, the livestock manure, livestock wastewater or livestock washing water that has undergone the above steps S2, S3 and S4 is finally treated with the ceramic separator CMF (S5) ) (Step S6). ≪ / RTI >

In the first processing step (S2, S3)

When livestock manure, livestock wastewater or livestock wastewater is fed into the impurity processor through the feeder, the livestock manure or livestock wastewater comes into contact with the outer circumferential surface of the rotating lattice drum in the impregnation processor, The solids of 6mm or more are attached to the outer circumference of the drum and separated from the cylinder and discharged.

The contaminants separated by filtration from the screen of the impregnation processor are squeezed and dewatered by a screw having a porous cylinder. Approximately 10-15% of the solids contained in the manure is removed in the smudge processor process. The treated water passing through the smudge processor is sent to the centrifugal dehydrator.

The centrifugal dehydrator separates the solid-liquid mixture introduced from the lower part of the apparatus by centrifugal force. The dehydrated sand and seeds are discharged to the opposite lower side of the inflow side, and the desorbed liquid component is drained to the lower side of the inflow side. Here 35 to 45% of the micro-solids contained in livestock manure or livestock wastewater are removed.

In the first treatment step (S2, S3), the impurities contained in the livestock manure, the livestock wastewater or the livestock washing water, the ammonia nitrogen, the volatile substance, the refractory substance and the fine solid matter are removed using the impregnation processor and the centrifugal dehydrator, So that the biological treatment of the microorganisms can be smoothly performed.

In the second processing step S4,

The livestock manure, livestock wastewater or livestock washing water that has undergone the first treatment steps (S2, S3) proceeds to the second treatment step, which is the biological treatment (S4). The second processing step is described through two preferred embodiments.

The first embodiment is a general activated sludge process, a continuous batch process, and a high-temperature aerobic digestion process in aerobic processes.

In the activated sludge process, only the liquid wastes from the centrifugal separator are introduced into the activated sludge tank in the treatment tank where the manure is mixed together, and aerobic decomposition is performed. As a result, the microorganisms decompose organics in the treated water under aerobic conditions Method.

In the continuous batch process, each unit process is consecutively performed according to the arrangement of the time determined by the process in which the inflow and outflow of treated water occur in a single reaction tank by aerobic suspension growth treatment method. That is, the reaction proceeds in the order of a fill process, a reaction process, a settling process, a draw process, and an idle process.

The high-temperature aerobic digestion process is a method in which organic matter is decomposed while oxygen is supplied and mixed in the reactor using a self-priming aeration / stirrer, and a method in which oxygen is supplied while circulating the lower internal water by an external circulation pump And the pH is increased by the generation of CO ₂ and decomposition of protein by the NH ₄ ⁺ -N, thereby acting as a nitrogen removal mechanism.

The second embodiment is an anaerobic digestion process during the anaerobic process. Anaerobic treatment is a method of sequential treatment of hydrolysis, acid production, and methane production by using microorganisms such as oil phase, fixed phase, and expansion phase under the condition that oxygen is not present. More specifically, the anaerobic digestion is a hydrolysis step in which large and complex soluble and insoluble molecules are decomposed into smaller molecules so as to migrate and be replaced into cells, and the product is fermented with organic acids and other low-molecular compounds, hydrogen and carbon dioxide The production of acetic acid, which is an early product of the fermentation process, and the production of hydrogen by microbial degradation of hydrolyzed products, and methane production, which is the main product of acid production, is fermentation of acetic acid with methane and carbon dioxide.

In this biological process, the pathogen and its medium are extinguished, and a considerable part of the organic matter in the sludge is liquefied and gasified, and the sludge is reduced or stabilized.

The third processing step (S5, S6, S7)

The treated water after the biological treatment (S4) is finally filtrated / separated / concentrated using the ceramic separation membrane (S5), which is a post-treatment process, to produce pots, effluents and treated water.

In the process step (S5) of the ceramic separation membrane apparatus, the porous ceramic membrane is formed of a continuous porous microcrystalline film continuous with the internal flow path, and a linear shear force is generated in the porous ceramic membrane of the internal flow path by controlling the linear velocity, it is possible to expect a high removal efficiency and a high quality liquid production and discharge or treatment number of 99% or more, while suppressing the fouling phenomenon and thereby greatly increasing the amount of treated water passing through the membrane, thereby increasing the overall treatment capacity.

Here, in addition to the above-described preferred embodiments, all of the treated water treated by other processes can be introduced into the separation membrane process.

2, the ceramic separation membrane device 200 includes a module unit 210, a filtration pipe 220, and a module driving unit (drive motor) 230. The module driving unit 230 generates power to provide biologically processed livestock manure, livestock wastewater or livestock washing water as a ceramic separation membrane in the filtration tube 220. The filtration tube 220 in the module unit 210 includes a ceramic separation membrane as shown in Figs. 3 and 4. The ceramic separator apparatus 200 further includes an inlet 211, a concentrated water outlet 212, and an outlet 213. The concentrated water discharged through the concentrated water outlet 212 may be provided to the module driving unit 230 of the ceramic separator apparatus 200 along the loop again and may be supplied again to the filtration tube 220 via the inlet 211 .

As shown in FIGS. 3 and 4, the ceramic filtration membrane of FIG. 3 may be included in the filtration pipe 220 in a single or plural numbers. FIG. 4 shows a tube including seven ceramic separators. However, the present invention is not limited thereto, and a tube may be formed such that the ceramic separator may include one, three, seven, twelve, etc. .

The treated water through the biological treatment (S4) flows into the filtration tube 220 in the module unit 210 through the inlet 211 of the ceramic separator apparatus 200. The influent water is filtered / separated / concentrated by the ceramic separator included in the filtration tube 220. The treated water that has passed through the ceramic separator is discharged through the outlet 213 and the concentrated water that has not passed through the ceramic separator is concentrated And is discharged through the discharge port 212. The concentrated water discharged through the concentrated water outlet 212 may be supplied to the filtration tube 220 through the inlet 211 and the loop again.

Due to the high solids concentration of the biological treatment water, conventional membrane treatment techniques result in many operational problems, but the ceramic membrane technology shows stable operating performance even at high solids concentrations.

The influent water flowing into the ceramic separator passes through the separation membrane and is separated into final treated water and concentrated water. The final treated water has very good water quality and can be reused as liquid fertilizer, washing water, landscape water, boiler water, etc. The treated water exceeding the reuse amount may be discharged (S7).

In the present invention, filtration / separation / concentration treatment is carried out using a ceramic separation membrane when filtration / separation / concentration treatment is performed on the liquid S 6, livestock wastewater or livestock washing water, and the ceramic separation membrane has a pore size size is 20 nm to 800 nm. The result of treating the pot pot S6 using a ceramic separator having a pore size of 20 nm to 800 nm is as follows.

As a result of the processing according to the present invention, Inspection items Inspection standard result Remarks Total nitrogen (%) Total amount of nitrogen, total amount of phosphoric acid, total amount of each component: 0.3 or more 0.17 Analysis method
Fertilizer quality inspection method

standard
Rural Development Administration Notice
No. 2016-26 Total amount of phosphoric acid (%) 0.39 Total garbage (%) 0.51 moisture (%) 95 or higher 95.43 Salinity (%) 0.3 or less 0.27 Lead (mg / kg) 15 or less 0.065 Chromium (mg / kg) 30 or less 0.40 Zinc (mg / kg) 130 or less 128.89 Mercury (mg / kg) 0.2 or less 0.018 Arsenic (mg / kg) 5 or less 0.14 Cadmium (mg / kg) 0.5 or less Non-detection Nickel (mg / kg) 5 or less 0.63 Copper (mg / kg) Less than 50 41.99 E. coli O157: H7 Non-detection Non-detection Salmonella Non-detection Non-detection

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

200: ceramic separator device 210:
211: Inlet port 212: Concentrated water outlet
213: outlet 220: filtration tube
230:

Claims (3)

The livestock manure, livestock wastewater or livestock washing water is subjected to biological treatment by a microbial removal method and then filtration / concentration treatment using a membrane device is used to filter the sludge produced from the pot by using a ceramic separator. Comprising:
Wherein the ceramic separation membrane has a pore size of 20 nm to 800 nm, wherein the ceramic separation membrane is used for treating livestock manure, livestock wastewater or animal husbandry washing water. The method according to claim 1,
The sludge is separated from the liquid waste, the livestock wastewater or the livestock washing water by applying a pressure of a predetermined level or more to the ceramic separation membrane in the process of filtering the livestock wastewater or the livestock washing water using the ceramic separation membrane A method of treating livestock manure, livestock wastewater or livestock washing water using a ceramic membrane. An apparatus for treating livestock manure, livestock wastewater or livestock washing water using a ceramic separation membrane, which is formed using the treatment method of claim 1 or claim 2.

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