CN116477760A - Method and system for treating waste liquid - Google Patents
Method and system for treating waste liquid Download PDFInfo
- Publication number
- CN116477760A CN116477760A CN202310409681.6A CN202310409681A CN116477760A CN 116477760 A CN116477760 A CN 116477760A CN 202310409681 A CN202310409681 A CN 202310409681A CN 116477760 A CN116477760 A CN 116477760A
- Authority
- CN
- China
- Prior art keywords
- denitrification
- dephosphorization
- autotrophic
- primary
- treatment liquid
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 93
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 84
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 75
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 21
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 241000894006 Bacteria Species 0.000 claims abstract description 18
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011593 sulfur Substances 0.000 claims abstract description 17
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 31
- 229910052698 phosphorus Chemical group 0.000 claims description 31
- 239000011574 phosphorus Chemical group 0.000 claims description 31
- 239000012528 membrane Substances 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000000149 chemical water pollutant Substances 0.000 claims description 5
- 239000010806 kitchen waste Substances 0.000 claims description 5
- 238000006396 nitration reaction Methods 0.000 claims description 4
- 238000003672 processing method Methods 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 239000010813 municipal solid waste Substances 0.000 description 11
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 244000005700 microbiome Species 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- -1 iron ions Chemical class 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 235000011007 phosphoric acid Nutrition 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/346—Iron bacteria
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- C02F2209/16—Total nitrogen (tkN-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
-
- 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
- C02F2209/44—Time
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (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
The invention belongs to the technical field of waste liquid treatment, and particularly relates to a method and a system for treating waste liquid. The processing method provided by the invention comprises the following steps: performing autotrophic denitrification treatment on the waste liquid to obtain autotrophic denitrification treatment liquid; the autotrophic nitrogen removal treatment comprises a first nitrification reaction and a first denitrification reaction which are sequentially carried out; performing primary denitrification and dephosphorization on the autotrophic nitrogen removal treatment liquid to obtain primary denitrification and dephosphorization treatment liquid; performing a secondary autotrophic denitrification reaction on the primary denitrification and dephosphorization treatment liquid to obtain a secondary denitrification and dephosphorization treatment liquid; the secondary denitrification and dephosphorization mode is a secondary autotrophic denitrification reaction; the primary denitrification and dephosphorization and the secondary denitrification and dephosphorization are performed under the conditions of a sulfur-iron composite filter material, sulfur autotrophic denitrifying bacteria and iron autotrophic denitrifying bacteria. The treatment method provided by the invention does not need to additionally add organic matters, and the effluent after wastewater treatment can meet the requirement of high emission standard.
Description
Technical Field
The invention belongs to the technical field of waste liquid treatment, and particularly relates to a method and a system for treating waste liquid.
Background
The garbage percolate and the kitchen wastewater have complex components and high total nitrogen content, are far higher than the conventional municipal wastewater or other wastewater, and the main treatment process is an AO+AO-MBR+nanofiltration membrane process aiming at the garbage percolate and the kitchen wastewater, however, with the increasing strictness of emission standards, the supervision strength is increased, and the process needs to additionally add organic matters, has high energy consumption and is difficult to meet the high emission standard requirements (domestic garbage landfill pollution control standard (GB 16889-2008) or comprehensive wastewater emission standard).
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a system for treating waste liquid, the treatment method provided by the invention does not need to additionally add organic matters, and the effluent after wastewater treatment can meet the requirement of high emission standard.
In order to achieve the above object, the invention provides a method for treating waste liquid, comprising the following steps:
performing autotrophic denitrification treatment on the waste liquid to obtain autotrophic denitrification treatment liquid; the autotrophic nitrogen removal treatment comprises a first nitrification reaction and a first denitrification reaction which are sequentially carried out; the waste liquid comprises landfill leachate and/or kitchen waste liquid;
performing primary denitrification and dephosphorization on the autotrophic nitrogen removal treatment liquid to obtain primary denitrification and dephosphorization treatment liquid; the primary denitrification and dephosphorization mode is primary autotrophic denitrification reaction;
performing secondary nitrogen and phosphorus removal on the primary nitrogen and phosphorus removal treatment liquid to obtain secondary nitrogen and phosphorus removal treatment liquid; the secondary denitrification and dephosphorization mode is a secondary autotrophic denitrification reaction; the primary denitrification and dephosphorization and the secondary denitrification and dephosphorization are performed under the conditions of a sulfur-iron composite filter material, sulfur autotrophic denitrifying bacteria and iron autotrophic denitrifying bacteria.
Preferably, the dissolved oxygen amount of the first nitration reaction is 1.5-4.0 mg/L; the pH value is 7.0-8.5, and the temperature is 15-30 ℃; the hydraulic retention time is 3-7 days.
Preferably, the dissolved oxygen amount of the primary autotrophic denitrification reaction is less than 0.5mg/L; the hydraulic retention time is 36-48 h, and the pH is 6-9.
Preferably, the sulfur-iron composite filter material comprises sulfur and FeS 2 。
Preferably, the particle size of the sulfur-iron composite filter material is 10-12 mm during the primary denitrification and dephosphorization.
Preferably, the particle size of the sulfur-iron composite filter material is 2-4 mm during the secondary denitrification and dephosphorization.
Preferably, after the secondary denitrification and dephosphorization treatment liquid is obtained, part of the secondary denitrification and dephosphorization treatment liquid flows back and is mixed with the autotrophic denitrification treatment liquid to perform primary denitrification and dephosphorization.
The invention also provides a garbage waste liquid treatment system, which comprises an anoxic/aerobic-membrane bioreactor 1;
a primary denitrification device 2 communicated with the outlet of the anoxic/aerobic one-membrane bioreactor 1;
and a secondary denitrification device 3 communicated with the outlet of the primary denitrification device 2.
The invention provides a method for treating waste liquid, which comprises the following steps: performing autotrophic denitrification treatment on the waste liquid to obtain autotrophic denitrification treatment liquid; the autotrophic nitrogen removal treatment comprises a first nitrification reaction and a first denitrification reaction which are sequentially carried out; the waste liquid comprises landfill leachate and/or kitchen waste liquid; performing primary denitrification and dephosphorization on the autotrophic nitrogen removal treatment liquid to obtain primary denitrification and dephosphorization treatment liquid; the primary denitrification and dephosphorization mode is primary autotrophic denitrification reaction; performing secondary nitrogen and phosphorus removal on the primary nitrogen and phosphorus removal treatment liquid to obtain secondary nitrogen and phosphorus removal treatment liquid; the secondary denitrification and dephosphorization mode is a secondary autotrophic denitrification reaction; the primary denitrification and dephosphorization and the secondary denitrification and dephosphorization are performed under the conditions of a sulfur-iron composite filter material, sulfur autotrophic denitrifying bacteria and iron autotrophic denitrifying bacteria.
The invention firstly carries out biological denitrification treatment by autotrophic aerobic microorganisms and heterotrophic facultative anaerobes, and degrades ammonia nitrogen in waste liquid by nitrification and denitrification to realize preliminary denitrification; then, the primary denitrification and dephosphorization and the secondary denitrification and dephosphorization are sequentially carried out, in the primary denitrification and dephosphorization and the secondary denitrification and dephosphorization, microorganisms grow on a sulfur-iron composite filter material to form a biological film, sulfur-containing autotrophic denitrifying bacteria and iron autotrophic denitrifying bacteria are arranged on the biological film, when wastewater flows through the biological film, pollutants are immersed into the biological film, sulfur elements and iron elements are slowly dissolved in the biological film, the sulfur autotrophic bacteria and the iron autotrophic bacteria acquire energy through oxidation-reduction state sulfur simple substances and iron simple substances, and nitrate nitrogen is used as an electron acceptor to react and is converted into nitrogen, so that nitrogen is further removed. And meanwhile, divalent or trivalent iron ions in ferric salt on the sulfur-iron composite filter material react with orthophosphoric acid ions in waste liquid to generate insoluble phosphate, and phosphorus removal is carried out, so that the effluent is finally discharged up to the standard.
The invention provides a garbage waste liquid treatment system, which comprises an anoxic/aerobic membrane bioreactor 1; a primary denitrification device 2 communicated with the outlet of the anoxic/aerobic one-membrane bioreactor 1; and a secondary denitrification device 3 communicated with the outlet of the primary denitrification device 2. When the system provided by the invention is used for treating garbage and waste liquid, no additional organic matters are required to be added, and the system has the advantages of low energy consumption and low operation cost.
Drawings
FIG. 1 is a system diagram of the treatment of waste liquid of the present invention.
Detailed Description
The invention provides a method for treating waste liquid, which comprises the following steps:
performing autotrophic denitrification treatment on the waste liquid to obtain autotrophic denitrification treatment liquid; the autotrophic nitrogen removal treatment comprises a first nitrification reaction and a first denitrification reaction which are sequentially carried out; the waste liquid comprises landfill leachate and/or kitchen waste liquid;
performing primary denitrification and dephosphorization on the autotrophic nitrogen removal treatment liquid to obtain primary denitrification and dephosphorization treatment liquid; the primary denitrification and dephosphorization mode is primary autotrophic denitrification reaction;
performing secondary nitrogen and phosphorus removal on the primary nitrogen and phosphorus removal treatment liquid to obtain secondary nitrogen and phosphorus removal treatment liquid; the secondary denitrification and dephosphorization mode is a secondary autotrophic denitrification reaction; the primary denitrification and dephosphorization and the secondary denitrification and dephosphorization are performed under the conditions of a sulfur-iron composite filter material, sulfur autotrophic denitrifying bacteria and iron autotrophic denitrifying bacteria.
In the present invention, the raw materials used in the present invention are preferably commercially available products unless otherwise specified.
According to the invention, autotrophic biological denitrification is carried out on the waste liquid to obtain the denitrification treatment liquid.
In the invention, the waste liquid comprises landfill leachate or kitchen waste liquid. The source of the waste liquid is not particularly limited, and the waste liquid can be obtained by a person skilled in the art.
In the invention, the concentration of total nitrogen in the waste liquid is preferably 1500-4000 mg/L, more preferably 2000-3000 mg/L; the concentration of ammonia nitrogen is preferably 1000-3500 mg/L, more preferably 2000-3000 mg/L; the concentration of total phosphorus is preferably 10 to 20mg/L, more preferably 15mg/L; the COD concentration is preferably 10000-50000 mg/L, the BOD concentration is preferably 3000-30000 mg/L, and the pH is preferably 7-8.
In the present invention, the autotrophic nitrogen removal is preferably a first nitrification reaction and a first denitrification reaction which are sequentially performed. In the present invention, the first nitration reaction is carried out under conditions of dissolved oxygen and autotrophic aerobic microorganisms.
In the present invention, the conditions of the first nitration reaction include: the dissolved oxygen concentration is preferably 1.5 to 4.0mg/L, more preferably 2 to 3mg/L; the pH value is preferably 7.0-8.5, more preferably 7.5-8.0, and the temperature is preferably 15-30 ℃, more preferably 25 ℃; the hydraulic retention time is preferably 3 to 7 days, more preferably 4 days.
In the present invention, the conditions of the first denitrification reaction include: the dissolved oxygen amount is preferably less than 0.5mg/L, more preferably 0.2-0.5 mg/L; the hydraulic retention time is preferably 30 to 72 hours, more preferably 48 hours, the pH is preferably 6 to 9, more preferably 7 to 8; the temperature is preferably 15 to 30 ℃, more preferably 28 ℃. In the present invention, the first denitrification reaction is preferably carried out under heterotrophic facultative anaerobe conditions.
After the autotrophic nitrogen removal treatment liquid is obtained, the autotrophic nitrogen removal treatment liquid is subjected to primary nitrogen and phosphorus removal to obtain the primary nitrogen and phosphorus removal treatment liquid.
In the invention, the primary denitrification and dephosphorization mode is primary autotrophic denitrification reaction.
In the present invention, the conditions for the primary autotrophic denitrification reaction include: the dissolved oxygen amount is preferably less than 0.5mg/L, more preferably 0.3-0.5 mg/L; the hydraulic retention time is preferably 36 to 48 hours, more preferably 40 hours, the pH is preferably 6 to 9, more preferably 7 to 8; the temperature is preferably 15 to 30 ℃, more preferably 25 ℃.
In the invention, the primary denitrification and dephosphorization is performed under the condition of a sulfur-iron composite filter material. In the invention, the sulfur-iron composite filter material preferably comprises sulfur and FeS 2 . In the invention, the particle size of the sulfur-iron composite filter material is preferably 10-12 mm during the primary denitrification and dephosphorization.
In the invention, microorganisms grow on a sulfur-iron composite filter material to form a biological film, and the biological film attached to the filter material contains sulfur-containing autotrophic denitrifying bacteria and iron autotrophic denitrifying bacteria. When autotrophic nitrogen removal treatment liquid flows through the biological membrane, pollutants are immersed in the biological membrane, sulfur elements are slowly dissolved in the biological membrane, sulfur autotrophic bacteria acquire energy through a redox state sulfur simple substance, and nitrate nitrogen is used as an electron acceptor to react and is converted into nitrogen. Meanwhile, trivalent and divalent ions of ferric salt on the filter material react with orthophosphoric acid ions in autotrophic nitrogen removal treatment liquid to generate insoluble phosphate, and ferric ions are hydrolyzed and undergo a large number of polymerization reactions to remove phosphorus, so that the phosphorus removal effect is enhanced.
After the primary nitrogen and phosphorus removal treatment liquid is obtained, the invention carries out secondary nitrogen and phosphorus removal on the primary nitrogen and phosphorus removal treatment liquid to obtain the secondary nitrogen and phosphorus removal treatment liquid.
In the invention, the secondary denitrification and dephosphorization mode is a secondary autotrophic denitrification reaction.
In the invention, the conditions of the secondary denitrification and dephosphorization comprise: the dissolved oxygen amount is preferably less than 0.5mg/L, more preferably 0.3-0.5 mg/L; the hydraulic retention time is preferably 12 to 24 hours, more preferably 20 hours, the pH is preferably 6 to 9, more preferably 7 to 8; the temperature is preferably 15 to 30 ℃, more preferably 25 ℃.
In the invention, the secondary denitrification and dephosphorization is performed under the condition of a sulfur-iron composite filter material. In the secondary denitrification and dephosphorization process, the particle size of the sulfur-iron composite filter material is preferably 2-4 mm.
In the invention, the partial secondary denitrification and dephosphorization treatment liquid is preferably refluxed, and is combined with the autotrophic biological denitrification treatment liquid to perform primary denitrification and dephosphorization. In the invention, the part of the secondary denitrification and dephosphorization treatment liquid is 30-50% of the secondary denitrification and dephosphorization treatment liquid.
The invention also provides a treatment system of the garbage and waste liquid, which comprises an anoxic/aerobic membrane bioreactor (AO-MBR) 1;
a primary denitrification device 2 communicated with the outlet of the anoxic/aerobic one-membrane bioreactor 1;
a secondary denitrification device 3 communicated with the outlet of the primary denitrification device 2;
the treatment system provided by the invention comprises an anoxic/aerobic one-membrane bioreactor 1, wherein the aperture of a filter hole of an AO-MBR membrane in the anoxic/aerobic one-membrane bioreactor 1 is preferably 0.005-0.25 mu m, more preferably 0.010-0.025 mu m; in the invention, the AO-MBR membrane is particularly preferably a Norider external tubular ultrafiltration membrane. In the present invention, the anoxic/aerobic membrane bioreactor 1 is provided with an inlet and an outlet.
The treatment system provided by the invention comprises a primary denitrification and dephosphorization device 3 communicated with the outlet of the anoxic/aerobic membrane bioreactor 1; the primary denitrification and dephosphorization device 3 is provided with an inlet and an outlet; the inlet of the primary denitrification and dephosphorization device 3 is communicated with the outlet of the anoxic/aerobic one-membrane bioreactor 1.
The treatment system provided by the invention comprises a secondary denitrification device 3 communicated with an outlet of the primary denitrification and dephosphorization device 3; the secondary denitrification device 3 is provided with an inlet and an outlet; the liquid inlet of the secondary denitrification device 3 is communicated with the outlet of the primary denitrification and dephosphorization device 3; in the present invention, the secondary denitrification device 3 is preferably provided with an internal circulation device and a reflux device. In the invention, the secondary denitrification device 3 is communicated with the inlet of the primary denitrification device 2 through an internal circulation device; the secondary denitrification device 3 is communicated with the inlet of the anoxic/aerobic one-film bioreactor 1 through a reflux device.
Fig. 1 is a diagram of a treatment system for waste liquid according to the present invention, and the treatment method described above is described with reference to fig. 1:
the waste liquid flows into an anoxic/aerobic membrane bioreactor 1 to carry out autotrophic denitrification to obtain autotrophic denitrification treatment liquid.
Flowing the autotrophic nitrogen and phosphorus removal treatment liquid into a first-stage nitrogen and phosphorus removal 2, and performing a first-stage autotrophic denitrification reaction on the first-stage nitrogen and phosphorus removal 2 to obtain the first-stage nitrogen and phosphorus removal treatment liquid.
And (3) flowing the primary denitrification and dephosphorization treatment liquid into a secondary denitrification and dephosphorization device 3 for secondary autotrophic denitrification reaction to obtain the secondary denitrification and dephosphorization treatment liquid.
In order to further illustrate the present invention, the processing methods and systems provided herein are described in detail with reference to examples, which are not to be construed as limiting the scope of the invention.
Example 1
The garbage percolate to be treated is from a small household garbage landfill in Yangqing district of Beijing, wherein COD (chemical oxygen demand) in the garbage percolate is 11000mg/L, BOD4500mg/L, ammonia nitrogen is 1500mg/L, total nitrogen is 2100mg/L, total phosphorus is 15mg/L, and pH value is 7.2.
In the invention, nitrifying bacteria are cultured by residual sludge in a nitrifying pond of a percolate treatment station of a landfill site of a small opening of a Yanqing district.
(1) The garbage leachate flows into an A/O-MBR system 1 to carry out autotrophic denitrification to obtain denitrification treatment liquid, wherein the autotrophic denitrification mode is to sequentially carry out a first nitrification reaction and a first denitrification reaction, the condition of the first nitrification reaction is that the dissolved oxygen concentration is 4.0mg/L, the residence time is 168h, the pH value is 8.0, and the temperature is 30 ℃; the first denitrification reaction has the conditions of residence time of 60h, pH value of 8.0, temperature of 30 ℃, effluent COD of 1200mg/L, BOD of 100mg/L, ammonia nitrogen of 120mg/L, total nitrogen of 200mg/L, total phosphorus of 8mg/L and pH value of 8.0.
(2) Flowing the autotrophic nitrogen and phosphorus removal treatment liquid into a primary nitrogen and phosphorus removal device 2, and then adding S and FeS 2 The composite filter material is subjected to primary treatmentThe autotrophic denitrification reaction is carried out, the particle size of the filter material is 10-12 mm, the primary autotrophic denitrification reaction is carried out under the conditions that the residence time is 36h, the pH value is 8.0, and the temperature is 30 ℃.
(3) The primary denitrification and dephosphorization treatment liquid flows into a secondary denitrification and dephosphorization device 3, and then a sulfur-iron composite filter material (comprising sulfur and FeS) is added 2 ) Performing a secondary autotrophic denitrification reaction to obtain a secondary denitrification and dephosphorization treatment solution; the conditions of the secondary autotrophic denitrification reaction are that the residence time is 12h, the pH value is 7-7.5, the temperature is 25 ℃, the COD of the final effluent is 30mg/L, the BOD is 3mg/L, the ammonia nitrogen is 0.5mg/L, the total nitrogen is 5mg/L, the total phosphorus is 0.1mg/L, and the pH value is 7.0. Wherein, 1/3 of the effluent flows back to the first-stage denitrification and dephosphorization device, and the first-stage denitrification and dephosphorization is performed again.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The method for treating the waste liquid is characterized by comprising the following steps of:
performing autotrophic denitrification treatment on the waste liquid to obtain autotrophic denitrification treatment liquid; the autotrophic nitrogen removal treatment comprises a first nitrification reaction and a first denitrification reaction which are sequentially carried out; the waste liquid comprises landfill leachate and/or kitchen waste liquid;
performing primary denitrification and dephosphorization on the autotrophic nitrogen removal treatment liquid to obtain primary denitrification and dephosphorization treatment liquid; the primary denitrification and dephosphorization mode is primary autotrophic denitrification reaction;
performing secondary nitrogen and phosphorus removal on the primary nitrogen and phosphorus removal treatment liquid to obtain secondary nitrogen and phosphorus removal treatment liquid; the secondary denitrification and dephosphorization mode is a secondary autotrophic denitrification reaction; the primary denitrification and dephosphorization and the secondary denitrification and dephosphorization are performed under the conditions of a sulfur-iron composite filter material, sulfur autotrophic denitrifying bacteria and iron autotrophic denitrifying bacteria.
2. The method according to claim 1, wherein the dissolved oxygen amount of the first nitration reaction is 1.5 to 4.0mg/L; the pH value is 7.0-8.5, and the temperature is 15-30 ℃; the hydraulic retention time is 3-7 days.
3. The process of claim 1, wherein the primary autotrophic denitrification reaction has a dissolved oxygen level of < 0.5mg/L; the hydraulic retention time is 36-48 h, and the pH is 6-9.
4. The method of claim 1, wherein the sulfur-iron composite filter material comprises sulfur and FeS 2 。
5. The method according to claim 1 or 4, wherein the particle size of the sulfur-iron composite filter material is 10-12 mm in the primary denitrification and dephosphorization process.
6. The method according to claim 1 or 4, wherein the particle size of the sulfur-iron composite filter material is 2-4 mm during the secondary denitrification and dephosphorization.
7. The method according to claim 1, wherein after the secondary denitrification and dephosphorization treatment liquid is obtained, part of the secondary denitrification and dephosphorization treatment liquid is refluxed and mixed with the autotrophic denitrification treatment liquid to perform primary denitrification and dephosphorization.
8. A waste liquid treatment system, which is characterized by comprising an anoxic/aerobic-membrane bioreactor (1);
a primary denitrification device (2) communicated with the outlet of the anoxic/aerobic one-membrane bioreactor (1);
and the secondary denitrification device (3) is communicated with the outlet of the primary denitrification device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310409681.6A CN116477760A (en) | 2023-04-17 | 2023-04-17 | Method and system for treating waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310409681.6A CN116477760A (en) | 2023-04-17 | 2023-04-17 | Method and system for treating waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116477760A true CN116477760A (en) | 2023-07-25 |
Family
ID=87220755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310409681.6A Pending CN116477760A (en) | 2023-04-17 | 2023-04-17 | Method and system for treating waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116477760A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
| CN209143956U (en) * | 2018-10-22 | 2019-07-23 | 天津泷涛环境科技有限公司 | A kind of AO-MBR sewage-treatment plant |
| CN110228908A (en) * | 2019-06-21 | 2019-09-13 | 中国矿业大学 | Utilize the sewage water treatment method of A/O-SBR and the combined denitrification dephosphorization of sulphur autotrophic denitrification |
| CN111115806A (en) * | 2020-01-10 | 2020-05-08 | 苏州市宏宇环境科技股份有限公司 | Urban secondary effluent autotrophic biological denitrification process and device |
| CN113321297A (en) * | 2021-06-04 | 2021-08-31 | 上海环境卫生工程设计院有限公司 | Secondary biochemical effluent ferro-sulphur synergistic polyculture denitrification deep denitrification method |
| CN216863705U (en) * | 2022-02-28 | 2022-07-01 | 北京天佑泽环保科技有限公司 | Sewage treatment is with removing algae device |
| CN115231774A (en) * | 2022-07-26 | 2022-10-25 | 苏州科技大学 | Treatment method and system for aged landfill leachate |
-
2023
- 2023-04-17 CN CN202310409681.6A patent/CN116477760A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
| CN209143956U (en) * | 2018-10-22 | 2019-07-23 | 天津泷涛环境科技有限公司 | A kind of AO-MBR sewage-treatment plant |
| CN110228908A (en) * | 2019-06-21 | 2019-09-13 | 中国矿业大学 | Utilize the sewage water treatment method of A/O-SBR and the combined denitrification dephosphorization of sulphur autotrophic denitrification |
| CN111115806A (en) * | 2020-01-10 | 2020-05-08 | 苏州市宏宇环境科技股份有限公司 | Urban secondary effluent autotrophic biological denitrification process and device |
| CN113321297A (en) * | 2021-06-04 | 2021-08-31 | 上海环境卫生工程设计院有限公司 | Secondary biochemical effluent ferro-sulphur synergistic polyculture denitrification deep denitrification method |
| CN216863705U (en) * | 2022-02-28 | 2022-07-01 | 北京天佑泽环保科技有限公司 | Sewage treatment is with removing algae device |
| CN115231774A (en) * | 2022-07-26 | 2022-10-25 | 苏州科技大学 | Treatment method and system for aged landfill leachate |
Non-Patent Citations (1)
| Title |
|---|
| 李文超;王琦;石寒松;周骏;: "城市黑臭河道中硫、铁自养反硝化微生物研究", 广东化工, no. 04 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU731280B2 (en) | Process, using ammonia rich water for the selection and enrichment of nitrifying micro-organisms for nitrification of wastewater | |
| CN108046518B (en) | Enhanced nitrogen and phosphorus removal device and method for low-carbon source sewage | |
| CN102557356A (en) | Process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation | |
| CN110395851B (en) | High-altitude town sewage treatment method based on nitrogen and phosphorus capture and completely autotrophic nitrogen removal | |
| CN112456643A (en) | System and method for realizing partial anaerobic ammonia oxidation deep nitrogen and phosphorus removal by circulating and alternately utilizing main flow and side flow zone biomembrane of urban sewage treatment plant | |
| CN107840550B (en) | Method for treating garbage leachate | |
| CN110759604B (en) | Two-stage SBR (sequencing batch reactor) series efficient biological denitrification method for low-carbon-source sewage | |
| CN101186387A (en) | Method for increasing organism synchronous dephosphorization denitrogenation effect of sewage under anaerobic-hypoxia condition | |
| CN111675438A (en) | Method for enriching anaerobic ammonium oxidation bacteria by utilizing tannery wastewater and activated sludge of biochemical system thereof | |
| CN109867352B (en) | Method for realizing autotrophic deep denitrification of nitrogen-containing wastewater by utilizing anaerobic MBR (membrane bioreactor) | |
| CN107973406B (en) | Device and method for separating organic matters and ammonia nitrogen in sewage | |
| CN111675426B (en) | Polyurethane sewage treatment system and method applying composite microbial inoculum | |
| CN106746179B (en) | A kind of processing method of organic matter and ferrimanganic excessive source water | |
| CN113184989A (en) | Device and method for synchronously treating sewage and sludge by combining sectional water inlet shortcut nitrification and anaerobic ammonia oxidation | |
| CN108862943B (en) | Adjustable biomembrane-activated sludge sewage treatment method and device | |
| CN115745178B (en) | Method for realizing synchronous aerobic anoxic denitrification and dephosphorization by composite granular sludge system | |
| CN109912126A (en) | A kind of pesticides waste water treatment process | |
| CN101817618A (en) | Method for treating coking wastewater biologically | |
| CN213357071U (en) | System for realizing short-cut nitrification-anaerobic ammonia oxidation denitrification stable operation of low-ammonia-nitrogen wastewater | |
| CN116477760A (en) | Method and system for treating waste liquid | |
| CN114620830A (en) | Municipal sewage treatment system and method | |
| CN113860499A (en) | Low-ammonia-nitrogen-concentration sewage mainstream anaerobic ammonia oxidation system and process for limiting nitrobacteria by antibiotics | |
| KR101306805B1 (en) | The method and Treatment process of Wastewater containing organic matter and nitrogen compounds-livestock wastewater, digestive wastewater, food wastewater | |
| KR20000060026A (en) | Advanced treatment apparatus and method in wastewater using anaerobic reactor with iron media and anoxic-aerobic recycling process | |
| CN112429839A (en) | Enhanced SBBR (sequencing batch reactor) process for treating high-ammonia nitrogen sewage and wastewater |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230912 Address after: Room 2211, Building 2, Yanqingyuan East Ring Road, Zhongguancun, Yanqing District, Beijing 102199 Applicant after: Wang Fei Applicant after: Tian Juan Address before: Room 2211, Building 2, Yanqingyuan East Ring Road, Zhongguancun, Yanqing District, Beijing 102199 Applicant before: Beijing tianyouze Environmental Protection Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right |