CN115215512A - Method for treating urban wastewater by using anaerobic reaction system - Google Patents
Method for treating urban wastewater by using anaerobic reaction system Download PDFInfo
- Publication number
- CN115215512A CN115215512A CN202210896967.7A CN202210896967A CN115215512A CN 115215512 A CN115215512 A CN 115215512A CN 202210896967 A CN202210896967 A CN 202210896967A CN 115215512 A CN115215512 A CN 115215512A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- digester
- sludge
- reaction system
- solids
- 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.)
- Pending
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 22
- 238000011282 treatment Methods 0.000 claims abstract description 15
- 239000010841 municipal wastewater Substances 0.000 claims abstract description 9
- 230000001172 regenerating effect Effects 0.000 claims abstract description 4
- 241000894006 Bacteria Species 0.000 claims abstract description 3
- 239000010802 sludge Substances 0.000 claims description 21
- 230000029087 digestion Effects 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 9
- 230000008719 thickening Effects 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 5
- 238000011221 initial treatment Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims 1
- 239000000701 coagulant Substances 0.000 claims 1
- 239000008394 flocculating agent Substances 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 5
- 239000005416 organic matter Substances 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005201 scrubbing Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- -1 BOD Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- 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
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
-
- 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
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Life Sciences & Earth Sciences (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)
Abstract
The present invention provides a method for treating municipal wastewater using an anaerobic reaction system by treating low concentration wastewater, including municipal sewage, using an anaerobic digester. In some examples, the wastewater stream is separated into a solids-rich portion and a solids-lean portion. The solids-lean fraction is treated, for example to remove nitrogen. The solids-rich fraction is treated in an anaerobic digester, preferably using influent or regenerative concentration. In other examples, the wastewater stream is sent to an anaerobic digester, with a solid-liquid separation stage downstream of the digester returning the active bacteria and undigested organic matter to the digester. Both of these cases may employ a process sequence involving treatment in an anoxic tank followed by nitrification in a nitrification tank, with a portion of the wastewater from the nitrification tank being recycled to the anoxic tank to provide nitrification and denitrification.
Description
Technical Field
The present invention relates to a process or apparatus for treating wastewater, which may be low concentration wastewater, such as municipal wastewater, involving anaerobic digestion and other biomass processes.
Background
Biogas is produced by anaerobic digestion of biomass-containing material. Biogas is typically composed of 50-75% methane and 25-50% carbon dioxide. Other gases such as nitrogen, hydrogen sulphide or oxygen may also be present, but in general the proportion of other gases will not be more than 10% of the biogas. Of these other gases, nitrogen will be the largest constituent. Biogas can be directly combusted with oxygen and thus can be used as a fuel. The methane in the marsh gas can also be concentrated to replace natural gas energy.
Biogas can be produced in the anaerobic digester. The digestion process mainly involves microorganisms, mainly bacteria, which break down or convert the transported raw materials to produce biogas and waste water. The process involves a range of bacterial types and processes, mainly hydrolysis, acidogenesis, acetogenesis and methanogenesis.
The composition of the raw materials is important to the biogas production process. Anaerobic digesters were originally designed primarily for the treatment of manure and sludge. Other raw materials may have different biodegradable material compositions. In general, simple carbohydrates are most easily digested, while macromolecules are more difficult to digest. The carbon-nitrogen ratio of the raw material is preferably 20-30. The moisture content or solids concentration may also vary from feedstock to feedstock.
Disclosure of Invention
Several wastewater treatment processes and equipment will be described. The process and apparatus will be more suitable for treating low concentration wastewater, for example municipal wastewater with COD below 1000 mg/L, although other wastewater may be treated. The temperature of the waste water may be at least seasonally 20 ℃ or lower.
In some processes and apparatuses, a wastewater stream is separated into a solids-rich portion and a solids-lean portion by a solids separation step. The separation step preferably removes at least some of the colloidal Biological Oxygen Demand (BOD) such that the solids-rich portion comprises 50% or more BOD and 70% or more of the Total Suspended Solids (TSS) in the wastewater. The solids-rich fraction is treated in an anaerobic digester, preferably with thickening or recuperative thickening of one or more streams of water flowing into the digester.
The solids-lean fraction is treated, for example to remove soluble BOD or nitrogen. When denitrification is required, the solids-lean fraction can be treated by means of nitrification and denitrification. By transferring solids, even colloidal solids, to an anaerobic digester and treating the remaining truly soluble (and easily digestible) BOD or nitrate in an energy efficient bioreactor, less energy can be used to treat wastewater while increasing the production of biogas compared to an activated sludge process that produces wastewater of similar quality.
In some processes and equipment, nitrogen is removed from process streams within wastewater treatment plants by nitrification and denitrification. The process stream is treated in an anoxic tank, wastewater from the anoxic tank is treated in a nitrification tank, and a portion of the wastewater from the nitrification tank is recycled back to the anoxic tank. The feed to the anoxic tank may include wastewater from an anaerobic digester, a digester that treats a portion of the feed wastewater, and a solids-depleted portion of the wastewater. An air scrubbing (or scouring) membrane filtration device may be installed after the nitrification tank. The amount of oxygen transferred to the mixed liquor by the scrubbing air can be used to assist in denitrification. Alternatively, the plant wastewater may be subjected to ozone oxidation to oxidize any remaining nitrites to nitrates.
In another process and apparatus, the wastewater is typically fed directly into an anaerobic digester. The performance of the process can be enhanced by one or more of regenerative thickening, integration with an air scrubbing membrane unit, and treatment of process streams involving nitrification and denitrification.
Drawings
Figure 1 is a schematic flow diagram giving an overview of a wastewater treatment plant in which an anaerobic digester is fed into a solids-enriched fraction of the wastewater and a solids-reduced fraction of the wastewater is removed by other treatment steps, such as nitrogen or BOD.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a wastewater treatment plant 10. The apparatus 10 has various unit process components and process streams, with raw feed water a (which may be municipal or other low-strength wastewater) entering the primary treatment area 1. The preliminary treatment may include coarse screening of the raw feed water a and removal of grit from the raw feed water a. The coarse screening can be cleaned and compacted, and the gravel can be cleaned. The screener and grit exit the treatment apparatus 10 for treatment by a washed and compacted screener and grit stream I. The primary treated waste stream B, comprising screened and degritted sewage, is directed to Enhanced Primary Treatment (EPT) zone 2.EPT zone 2 removes suspended organic matter, preferably including colloidal matter, to reduce Total Suspended Solids (TSS) and BOD of the primary treated waste stream B, the primary clarifier in the activated sludge process, even though operated with some chemical enhancement to provide more removal than normal removal, typically less than 50% BOD and more than 70% TSS in the pretreated wastewater B. EPT zone 2 preferably removes 50% or more of BOD and 70% or more of TSS in the pretreated wastewater B. BOD removal in EPT zone 2 may include at least some colloidal BOD, and may be 60% or more or 70% or more. The TSS removal rate in EPT region 2 may be 80% or more or 90% or more.
The anaerobic digestion zone 4 treats the primary sludge E and the secondary sludge F by anaerobic digestion, preferably including influent or return sludge concentration and effluent sludge dewatering. Digestion may be carried out in a single stage or a two stage digester. Digestion is best carried out with enhanced solids concentration caused by one or more of primary sludge E thickening, secondary sludge F thickening, regenerative thickening involving recycling of solids separated from the waste stream, or co-digestion of additional waste. Waste digestion sludges are typically dewatered. Digester reflux stream G (including, for example, dewatering liquor and any influent or reheated concentrated wastewater produced during dewatering of the waste sludge) is returned to either stream B or C for further processing. The dewatered and digested sludge cake H is typically used for drying, composting or disposal. The anaerobic digester gas or biogas J produced in the anaerobic digestion zone 4 is preferably used as fuel.
The primary effluent C flows into a secondary or biological treatment zone 3. The secondary treatment is used to remove one or more residual contaminants such as BOD, nitrogen or phosphorus from the primary effluent C. The secondary treatment may also include a further solids separation step. For example, the removal of nitrogen from the primary effluent C may use nitrification and denitrification processes. Final solids separation in the secondary treatment zone 3 can be carried out using a secondary clarifier, membrane, or chemically enhanced microsieve, or the like. The secondary sludge F3 produced by the secondary treatment enters the anaerobic digestion zone 4. The final effluent D is sent to treatment or reuse, optionally after further treatment steps (e.g. disinfection).
Claims (7)
1. A method for treating municipal wastewater using an anaerobic reaction system, comprising the steps of: injecting the first-stage or second-stage sludge or the mixture of the first-stage or second-stage sludge and the second-stage sludge into an anaerobic digestion tank, and continuously stirring; the solid content in the anaerobic digestion tank is kept at 4 percent or more through regenerative thickening; wherein the primary sludge is produced by primary treatment comprising contact aeration of solids of the wastewater or addition of coagulants or flocculants to the wastewater prior to passage through a clarifier or microporous web, such that the primary sludge contains at least 50% BOD.
2. A method for treating municipal wastewater using an anaerobic reaction system according to claim 1, comprising extracting the digestate, adding a polymer to the digestate, thickening the digestate, and returning the thickened digestate to the digester.
3. The method for treating municipal wastewater using an anaerobic reaction system according to claim 1 further comprising wasted sludge waste from the digester; and comprises feeding sludge to the digester at a total solids concentration of 1-5%.
4. The method of claim 1, comprising extracting waste, treating the waste in a screw, drum or centrifugal concentrator, and returning the concentrated sludge to the digester.
5. The method for treating municipal wastewater using an anaerobic reaction system according to claim 4 wherein substantially no other raw materials are added to the digester.
6. A method of treating municipal wastewater using an anaerobic reaction system according to claim 1 wherein the digester is operated at 4-6% solids content.
7. The method for treating municipal wastewater using an anaerobic reaction system according to claim 1, wherein the treatment produced by the secondary sludge comprises nitrification and denitrification, anammox bacteria denitrification, passing through the moving bed bioreactor with a hydraulic retention time of 90 minutes or less, or a loading rate of 6 kg BOD per cubic meter of storage tank per day or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896967.7A CN115215512A (en) | 2022-07-28 | 2022-07-28 | Method for treating urban wastewater by using anaerobic reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896967.7A CN115215512A (en) | 2022-07-28 | 2022-07-28 | Method for treating urban wastewater by using anaerobic reaction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115215512A true CN115215512A (en) | 2022-10-21 |
Family
ID=83614730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210896967.7A Pending CN115215512A (en) | 2022-07-28 | 2022-07-28 | Method for treating urban wastewater by using anaerobic reaction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115215512A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009120384A2 (en) * | 2008-03-28 | 2009-10-01 | Siemens Water Technologies Corp. | Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods |
| CN102225825A (en) * | 2011-05-09 | 2011-10-26 | 余静 | Zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage |
| CN105263871A (en) * | 2013-02-22 | 2016-01-20 | 通用电气公司 | Wastewater treatment with membrane aerated biofilm and anaerobic digester |
-
2022
- 2022-07-28 CN CN202210896967.7A patent/CN115215512A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009120384A2 (en) * | 2008-03-28 | 2009-10-01 | Siemens Water Technologies Corp. | Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods |
| CN102225825A (en) * | 2011-05-09 | 2011-10-26 | 余静 | Zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage |
| CN105263871A (en) * | 2013-02-22 | 2016-01-20 | 通用电气公司 | Wastewater treatment with membrane aerated biofilm and anaerobic digester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11001517B2 (en) | Bioreactor for treating sewage and sewage treatment system comprising the same | |
| US9845260B2 (en) | Treatment of municipal wastewater with anaerobic digestion | |
| JP5826851B2 (en) | Hypoxic and biological phosphorus and nitrogen removal simultaneously with energy recovery | |
| CN101560039B (en) | Landfill leachate wastewater treatment system and process thereof | |
| KR101430722B1 (en) | Sewage and Wastewater Treatment Method and System for Energy Saving | |
| CN111153508A (en) | Multi-stage treatment process for kitchen sewage | |
| KR20210091786A (en) | Advanced Phosphorus Recovery Process and Plant | |
| KR20220096414A (en) | Apparatus for treating waste water using iron oxide powder | |
| KR100274534B1 (en) | Nitrogen and phosphorus removal methods with using fermented organic wastes | |
| JP2007061773A (en) | Organic sludge treatment method and apparatus | |
| KR101828296B1 (en) | Wastewater Processing Appliance using Existing Activated Sludge Appliance as Shortcut Nitrogen Removal Process | |
| WO2018183234A1 (en) | System and process for biologically treating wastewater and producing biogas that is converted to a supplemental carbon source used in the biological treatment of the wastewater | |
| Diamantis et al. | 6.40 Efficiency and Sustainability of Urban Wastewater Treatment with Maximum Separation of the Solid and Liquid Fraction | |
| KR102340961B1 (en) | Apparatus for treating waste water using iron oxide powder | |
| CN212246699U (en) | Neomycin sulfate waste water treatment device | |
| CN212050998U (en) | Cassava starch effluent treatment plant | |
| WO2021117980A1 (en) | Process for biogasifying organic waste with high efficiency through denitrification of digestion wastewater by using digestion gas and preparation of char of digested sludge | |
| KR100714825B1 (en) | Method for treating sewage and high organic loading wastewater by anaerobic/oxic process with membrane and biological aerated filter | |
| CN115215512A (en) | Method for treating urban wastewater by using anaerobic reaction system | |
| JP2005238185A (en) | High-efficiency general organic drainage and waste treatment system and device of the same | |
| KR20190134583A (en) | Bio-reactor for sewage treatment and sewage treatment system comprising the same | |
| KR101548295B1 (en) | System for bio gasification and drying of excretion | |
| CN215667629U (en) | Landfill leachate and kitchen anaerobic biogas slurry coprocessing device | |
| CN216236576U (en) | Efficient treatment system for garbage squeezing water | |
| CN117088579B (en) | Non-membrane method full-quantization treatment method for landfill leachate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |