CN115504620A - Preserved szechuan pickle wastewater treatment process based on water pollutant discharge standard of preserved szechuan pickle industry - Google Patents
Preserved szechuan pickle wastewater treatment process based on water pollutant discharge standard of preserved szechuan pickle industry Download PDFInfo
- Publication number
- CN115504620A CN115504620A CN202210602670.5A CN202210602670A CN115504620A CN 115504620 A CN115504620 A CN 115504620A CN 202210602670 A CN202210602670 A CN 202210602670A CN 115504620 A CN115504620 A CN 115504620A
- Authority
- CN
- China
- Prior art keywords
- preserved szechuan
- szechuan pickle
- tank
- sedimentation tank
- retention time
- 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
- 235000021110 pickles Nutrition 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008569 process Effects 0.000 title claims abstract description 30
- 239000003403 water pollutant Substances 0.000 title claims abstract description 17
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 16
- 238000004062 sedimentation Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002351 wastewater Substances 0.000 claims abstract description 31
- 230000020477 pH reduction Effects 0.000 claims abstract description 22
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 15
- 241000219198 Brassica Species 0.000 claims abstract description 14
- 235000003351 Brassica cretica Nutrition 0.000 claims abstract description 14
- 235000003343 Brassica rupestris Nutrition 0.000 claims abstract description 14
- QKSKPIVNLNLAAV-UHFFFAOYSA-N bis(2-chloroethyl) sulfide Chemical compound ClCCSCCCl QKSKPIVNLNLAAV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 235000010460 mustard Nutrition 0.000 claims abstract description 14
- 230000001112 coagulating effect Effects 0.000 claims abstract description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 6
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 27
- 230000014759 maintenance of location Effects 0.000 claims description 22
- 238000006460 hydrolysis reaction Methods 0.000 claims description 16
- 230000007062 hydrolysis Effects 0.000 claims description 15
- 238000010992 reflux Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 230000001546 nitrifying effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 125000001477 organic nitrogen group Chemical group 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract 3
- 230000015271 coagulation Effects 0.000 abstract 1
- 238000005345 coagulation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000000543 intermediate Substances 0.000 description 6
- 229920002401 polyacrylamide Polymers 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000701 coagulant Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000011020 pilot scale process Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- KQNPFQTWMSNSAP-UHFFFAOYSA-N isobutyric acid Chemical compound CC(C)C(O)=O KQNPFQTWMSNSAP-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 2
- XYHKNCXZYYTLRG-UHFFFAOYSA-N 1h-imidazole-2-carbaldehyde Chemical compound O=CC1=NC=CN1 XYHKNCXZYYTLRG-UHFFFAOYSA-N 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-M 3-Methylbutanoic acid Natural products CC(C)CC([O-])=O GWYFCOCPABKNJV-UHFFFAOYSA-M 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108010093096 Immobilized Enzymes Proteins 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 238000005273 aeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-N beta-methyl-butyric acid Natural products CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 description 1
- 230000002210 biocatalytic effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 125000005341 metaphosphate group Chemical group 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229940005605 valeric acid Drugs 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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
- C02F3/28—Anaerobic digestion processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
-
- 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
- C02F2209/05—Conductivity or salinity
-
- 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
- C02F2209/12—Volatile Fatty Acids (VFAs)
-
- 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
- C02F2209/29—Chlorine compounds
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to a preserved szechuan pickle wastewater treatment process based on the water pollutant discharge standard of the preserved szechuan pickle industry, and belongs to the technical field of wastewater treatment. The method mainly comprises the following steps: firstly, removing partial impurities and TP in the preserved szechuan pickle wastewater by adopting coagulating sedimentation; then, converting organic nitrogen in the wastewater into ammonia nitrogen through hydrolytic acidification, removing part of COD and generating VFAs; denitrification is realized through an A/A/O process, and COD and part of TP are removed; and finally, controlling the TP of the effluent to reach the standard by dephosphorization precipitation. The invention mainly couples (hydrolytic acidification + A/A/O) as a main process, and is mainly different from the prior preserved szechuan pickle wastewater treatment process flow in that: a denitrification unit is added, an anaerobic methanogenesis unit is deleted, and a carbon source is redistributed. And the stability of the treatment system is controlled under the condition that the chloride ions in the inlet water are 5000mg/L by combining the pre-coagulation precipitation and the post-dephosphorization precipitation. The treated effluent of the combined process meets the emission standard executed since 2025 in DB50/1050-2020 Water pollutant emission Standard of mustard tuber industry.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a preserved szechuan pickle wastewater treatment process based on the water pollutant emission standard of the preserved szechuan pickle industry, which has stable process running condition, and the treated effluent meets the emission standard executed since 2025 years in discharge Standard DB50/1050-2020 of Water pollutant of the preserved szechuan pickle industry.
Background
The planting and processing of the preserved szechuan pickle is an agricultural pillar type industry in three gorges reservoir areas, and the preserved szechuan pickle can generate preserved szechuan pickle wastewater in the pickling processing process. The preserved szechuan pickle wastewater is used as special food processing salt-containing wastewater and has the characteristics of high salinity, high organic matter concentration, high nitrogen and phosphorus concentration, large amount of generated products, irregular discharge and the like. If the preserved szechuan pickle wastewater is not effectively treated and discharged into the environment, the preserved szechuan pickle wastewater causes pollution to soil and water, and the large-scale development and the economic sustainable development of the preserved szechuan pickle special industry in the three gorges reservoir area are limited.
At present, a lot of researches are carried out on various kinds of salt-containing wastewater and tuber mustard wastewater, and physicochemical, biochemical and comprehensive treatment systems are involved. The biochemical treatment has better economy due to better biodegradability of the preserved szechuan pickle wastewater, but salinity can affect system microorganisms, and due to various reasons of economy and technology, the research on the debugging and operation of the scale of the preserved szechuan pickle wastewater treatment technology engineering is less, and the long-term research on the treatment and operation is lacked.
At present, the preserved szechuan pickle wastewater treatment engineering matched with and constructed by preserved szechuan pickle production enterprises mostly executes the primary standard of Integrated wastewater discharge Standard GB8978-1996, the main processes capable of ensuring standard discharge all contain a two-phase anaerobic-aerobic core unit combination, are mainly used for removing COD and ammonia nitrogen, and basically do not relate to the denitrification function. The discharge standard of water pollutants in the tuber mustard industry DB50/1050-2020 fills the blank of the discharge standard of the water pollutants in the tuber mustard industry, increases the requirement on the indexes of total nitrogen and chloride ions, puts forward a new requirement on a tuber mustard wastewater treatment plant, promotes the innovation of the reduction and treatment technology of the wastewater in the tuber mustard industry, has positive significance on promoting the cooperative development of the upstream environmental protection and the industrial economy of the three gorges reservoir region, and does not have a mature process aiming at the standards at present. The denitrification function needs to be added on the basis of the existing preserved szechuan pickle wastewater treatment process, the anaerobic methanogenesis function is deleted, and the added and deleted process units all need a large amount of carbon sources which are not equal to each other, so that the carbon sources need to be reasonably distributed again, and pollutants can be effectively removed under the salinity load required by the standard, and the method is the key for meeting the discharge requirements of the preserved szechuan pickle industry water pollutant discharge standard DB 50/1050-2020.
Disclosure of Invention
The invention relates to a preserved szechuan pickle wastewater treatment process based on the water pollutant discharge standard of preserved szechuan pickle industry, in particular to a sewage treatment process mainly comprising coupling coagulating sedimentation, hydrolytic acidification, A/A/O and dephosphorization sedimentation, wherein a treatment system is controlled to be stable under the condition that the chloride ion of inlet water is 5000mg/L, a water carbon source is reasonably distributed, pollutants are effectively removed, and the effluent of the process treatment meets the discharge standard executed since 2025 in the water pollutant discharge standard of preserved szechuan pickle industry DB 50/1050-2020.
Description of terms:
and (3) hot pickled mustard tuber wastewater: the pickling waste water in the processing process of the food preserved szechuan pickle is a byproduct in the production process of the preserved szechuan pickle.
COD: and (3) measuring the amount of the reducing substances needing to be oxidized in the water sample by a chemical method.
VFAs: volatile fatty acids, typically organic acids having carbon chains of 1 to 6 carbon atoms, including acetic acid, propionic acid, isobutyric acid, valeric acid, isovaleric acid, n-butyric acid, and the like, are important intermediates in anaerobic digestion processes.
TN: the total of organic nitrogen, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in water.
Ammonia nitrogen: ammonia nitrogen refers to ammonia in the form of free ammonia or ionic ammonia.
TP: the total phosphorus refers to the content of phosphorus in water, and mainly exists in the forms of orthophosphate, condensed phosphate, pyrophosphate, metaphosphate, organic group-bonded phosphate and the like.
A regulating reservoir: the structure of stable water yield and quality of water reduces the inflow and the impact of water quality change.
A coagulating sedimentation tank: the colloid stability can be destroyed through coagulating sedimentation, so that colloid particles are destabilized and collided, and large particle flocs are formed by the aggregation of micro suspended matters.
PFS: coagulant, polymeric ferric sulfate.
PAM: coagulant aids, polyacrylamides.
A hydrolysis acidification pool: microorganisms complete biocatalytic hydrolysis reactions by releasing extracellular free enzymes or immobilized enzymes attached to the outer cell wall, with the metabolites of the microorganisms being primarily various organic acids.
An intermediate sedimentation tank: the sludge-water separation is realized, the mixed liquid is clarified, the sludge is concentrated, and the separated sludge flows back to the structure of the hydrolysis acidification tank.
A/A/O pool: a common secondary sewage treatment process with synchronous denitrification and dephosphorization functions
MLSS: the mixed solution suspended solids concentration.
A secondary sedimentation tank: and sludge-water separation is realized, the mixed liquid is clarified, the sludge is concentrated, and the separated sludge is returned to the structure of the biological treatment section.
A dephosphorization sedimentation tank: the coagulant and phosphate radical in the waste water generate insoluble phosphate to realize the separation and removal of phosphorus.
Hydraulic retention time: average residence time of wastewater in the reactor.
The technical scheme of the invention is as follows:
a preserved szechuan pickle wastewater treatment process based on the water pollutant discharge standard of preserved szechuan pickle industry mainly comprises the following steps:
step 1: water is fed;
and 2, step: stabilizing the inflow and the impact of water quality change through an adjusting tank;
and step 3: removing partial impurities and TP in the preserved szechuan pickle wastewater through coagulating sedimentation;
and 4, step 4: organic nitrogen in the wastewater is converted into ammonia nitrogen through hydrolytic acidification, partial COD is removed, and VFAs are generated;
and 5: and the sludge-water separation is realized through the intermediate sedimentation tank, so that the mixed liquid is clarified, the sludge is concentrated, and the separated sludge flows back to the hydrolysis acidification tank.
Step 6: denitrification is realized through an A/A/O process, and COD and part of TP are removed;
and 7: and (3) separating mud and water by a secondary sedimentation tank, clarifying the mixed solution, concentrating the sludge and refluxing the separated sludge to the biological treatment section.
And step 8: ensuring that the effluent TP reaches the standard through a dephosphorization sedimentation tank;
and step 9: and (4) discharging water, wherein the discharged water meets the discharge standard executed since 2025 in DB50/1050-2020 Water pollutant discharge Standard of preserved szechuan pickle industry.
According to the invention, preferably, the concentrations of COD, TN, ammonia nitrogen, TP and chloride ions of the inlet water of the preserved szechuan pickle wastewater in the step 1 are controlled to be 2000-3000, 160-240, 72-108, 24-36 and 5000mg/L respectively.
According to the invention, the hydraulic retention time of the regulating reservoir in the step 2 is preferably controlled to be 6-24 h.
According to the present invention, it is preferable that the amount of PFS added in step 3 is determined by the specific water quality, about 10.5mg/L of PFS is required for removing each unit concentration of TP, and the amount of PAM added is 1 to 3mg/L.
According to the invention, preferably, the pH value of the hydrolysis acidification tank is controlled to be 6.5-7.0 in the step 4, and the COD inlet water volume load is 3.4-5.0 kgCOD/(m) 3 D) the hydraulic retention time is 10 to 16h.
According to the invention, preferably, in the step 5, the reflux ratio of the hydrolysis acidification sludge in the intermediate sedimentation tank is controlled to be 50-100%, and the hydraulic retention time is 7-11 h.
According to the invention, preferably, in the step 6, the dissolved oxygen concentration of the anaerobic pool is controlled to be lower than 0.2mg/L, and the hydraulic retention time is 3-5 h; controlling the dissolved oxygen concentration of the anoxic tank to be lower than 0.5mg/L and the hydraulic retention time to be 8-12 h; controlling the concentration of dissolved oxygen in the aerobic tank to be 2.0-3.5 mg/L and the hydraulic retention time to be 19-29 h; the reflux ratio of the sludge in the A/A/O tank is controlled to be 60-100%, the reflux ratio of the nitrifying liquid is controlled to be 200-400%, and the MLSS is controlled to be 4000-6000 mg/L.
According to the invention, the hydraulic retention time of the secondary sedimentation tank in the step 7 is preferably controlled to be 9-14 h.
According to the present invention, it is preferable that the PFS is added in step 8 in an amount of about 10.5mg/L and the PAM is added in an amount of 1 to 3mg/L, depending on the water quality.
Compared with the prior art, the invention has the beneficial effects that:
1. the sewage treatment process mainly comprises the steps of coupling coagulating sedimentation, hydrolysis acidification, A/A/O and dephosphorization sedimentation, and has the advantages of low process operation cost and stable operation.
2. The invention is mainly characterized in that the hydrolysis acidification section is fully exerted to ensure the carbon source requirement of denitrification and reasonably distribute the carbon source.
3. The method can still ensure effective removal of pollutants under salinity load required by standards, meet the emission standards of the water pollutant emission standards of the preserved szechuan pickle industry DB50/1050-2020 from 2025, and has important significance for filling the blank on promoting the coordinated and sustainable development of the preserved szechuan pickle industry and environmental protection.
Drawings
FIG. 1 is a schematic diagram of a pilot scale laboratory apparatus in an embodiment of the present invention.
FIG. 2 is a schematic diagram of a process flow according to an embodiment of the present invention.
FIG. 3 is a diagram showing the effect of removing COD by the example of the present invention.
Fig. 4 is a diagram illustrating the TN processing removal effect according to the embodiment of the present invention.
FIG. 5 is a diagram illustrating the ammonia nitrogen removal effect of the ammonia nitrogen treatment in the embodiment of the present invention.
FIG. 6 is a diagram illustrating the effect of removing TP in the embodiment of the present invention.
Detailed Description
The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings. The reagents and instruments used in the examples are not indicated by the manufacturer, and are all conventional products available commercially.
Examples
The design water quality of the water fed into the embodiment of the invention for treating the preserved szechuan pickle wastewater is as follows: the COD, TN, ammonia nitrogen, TP and chloride ion concentrations were about 2500, 200, 90, 30 and 5000mg/L, respectively.
The method is characterized in that a laboratory pilot scale device which is mainly composed of a regulating tank, a coagulating sedimentation tank, a hydrolysis acidification tank, an intermediate sedimentation tank, an A/A/O tank, a secondary sedimentation tank and a phosphorus removal sedimentation tank is adopted to treat tuber mustard wastewater with designed water quality, the schematic diagram of the pilot scale device is shown in figure 1, the schematic diagram of the process flow is shown in figure 2, the daily treatment capacity is 60L/d, and the treatment reaches the discharge standard executed from 2025 years in water pollutant discharge Standard DB50/1050-2020 of the tuber mustard industry.
Step 1: inoculating and culturing sludge, wherein the activated sludge is residual sludge from a CASS tank of a certain preserved szechuan pickle wastewater treatment plant in Chongqing, and the initial salinity of the sludge is 1.22%; the hydrolyzed and acidified sludge is returned sludge from a hydrolyzed and acidified tank of a tuber mustard wastewater treatment plant in Chongqing, and the initial salinity of the hydrolyzed and acidified sludge is 1.25 percent. Preparing and respectively adding tuber mustard wastewater, controlling aeration of activated sludge under the condition that the organic load is 0.3-0.5 kgCOD/(kgMLSS.d), and controlling the volume load of hydrolytic acidification sludge to be 1.0-1.2 kgCOD/(m < m > MLSS.d) 3 D) stirring slowly and transferring to the reactor after several days. And after the sludge is stable, carrying out subsequent steps to treat the preserved szechuan pickle wastewater.
Step 2: the water inflow rate and the water quality change impact are stabilized by the adjusting tank, and the hydraulic retention time of the adjusting tank is about 6 hours.
And step 3: and (3) removing partial impurities and TP from the effluent treated in the step (2) by adopting coagulating sedimentation, wherein the removal rate of TP in the tuber mustard wastewater is about 70% under the conditions that the initial pH value of the tuber mustard wastewater is adjusted to be 8.0, the stirring speed is 200r/min, the stirring time is 5min, and the addition amount of PFS is 200mg/L, PAM is 1mg/L.
And 4, step 4: the effluent treated in the step 3 enters a hydrolysis acidification tank to convert organic nitrogen in the wastewater into ammonia nitrogen, and the ammonia nitrogen removal rate is about-93%; removing part of COD, wherein the removal rate of the COD is about 23%; VFAs are formed, and the acidification degree reaches about 37%. The pH value of the hydrolysis acidification tank is 6.5-7.0, and the volume load of the influent COD is about 4.3 kgCOD/(m) 3 D) a hydraulic retention time of about 13.2h.
And 5: and (4) allowing the effluent treated in the step (4) to enter an intermediate sedimentation tank to realize mud-water separation, clarifying the mixed liquor, concentrating the sludge and refluxing the separated sludge to a hydrolysis acidification tank, wherein the reflux ratio is about 50%, and the hydraulic retention time is about 8.6h.
Step 6: and (5) enabling the effluent treated in the step (5) to enter an A/A/O reaction tank to realize denitrification and remove COD and partial TP. Through the A/A/O process, the removal rates of COD, ammonia nitrogen, TN and TP are respectively about 97%, 99%, 87% and 31%. The concentration of dissolved oxygen in the anaerobic pool is lower than 0.2mg/L, and the hydraulic retention time is about 4.2h; the concentration of dissolved oxygen in the anoxic tank is lower than 0.5mg/L, and the hydraulic retention time is about 10.25h; the concentration of dissolved oxygen in the aerobic tank is 3.5mg/L, and the hydraulic retention time is about 24h; the reflux ratio of the sludge is about 100 percent, the reflux ratio of the nitrifying liquid is about 300 percent, and the MLSS is about 4500mg/L.
And 7: and (4) enabling the effluent treated in the step (6) to enter a secondary sedimentation tank, realizing sludge-water separation through the secondary sedimentation tank, clarifying the mixed liquor, concentrating the sludge, and refluxing the separated sludge to a biological treatment section, wherein the hydraulic retention time is about 11.7 hours.
And 8: the effluent treated in the step 7 enters a dephosphorization sedimentation tank, and the effluent TP is ensured to reach the standard through the dephosphorization sedimentation tank; the dosage of PFS is 60mg/L, and the dosage of PAM is 1mg/L.
According to the embodiment, the treatment method is used for treating the preserved szechuan pickle wastewater with designed inlet water quality, the treatment effect is shown in fig. 3-6, the average total removal rate of COD, TN, ammonia nitrogen and TP is respectively about 98%, 88%, 98% and 99%, the water outlet indexes can meet the discharge requirement executed in 2025 years in the preserved szechuan pickle industry water pollutant discharge standard DB50/1050-2020, and the carbon source distribution condition is good.
The above description is illustrative of the present invention and its embodiments, and is not to be construed as limiting, and the embodiments or figures shown in the drawings are only one embodiment of the present invention and are not intended to be limiting. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (13)
1. The preserved szechuan pickle wastewater treatment process based on the water pollutant emission standard of the preserved szechuan pickle industry, the main process is 'hydrolytic acidification + A/A/O', and the process comprises the following process unit combinations: an adjusting tank, a coagulating sedimentation tank, a hydrolysis acidification tank, an intermediate sedimentation tank, an A/A/O tank, a secondary sedimentation tank and a dephosphorization sedimentation tank.
2. The preserved szechuan pickle wastewater of claim 1, wherein the influent concentrations of COD, TN, ammonia nitrogen, TP and chloride ions of the preserved szechuan pickle wastewater are 2000-3000, 160-240, 72-108, 24-36 and 5000mg/L respectively.
3. The equalizing basin of claim 1, wherein the equalizing basin homogenizes the incoming hot pickled mustard tuber waste water, and the hydraulic retention time is 6-24 hours.
4. The coagulating sedimentation tank as claimed in claim 1, wherein the coagulating sedimentation tank removes part of impurities and TP in the preserved szechuan pickle wastewater, the dosage of PFS is determined by specific water quality, and the dosage of PAM is 1-3 mg/L.
5. The PFS dosage of claim 4, wherein PFS is used as a phosphorus removal agent within the scope of claim, and about 10.5mg/L PFS is required to remove per unit concentration of TP.
6. The hydrolysis acidification tank of claim 1, wherein the pH value of the hydrolysis acidification tank is 6.5 to 7.0, and the COD inlet water volume load is 3.4 to 5.0 kgCOD/(m) 3 D) the hydraulic retention time is 10 to 16h.
7. The intermediate sedimentation tank of claim 1, wherein the hydrolysis acidification sludge reflux ratio of the intermediate sedimentation tank is 50% to 100%, and the hydraulic retention time is 7 to 11 hours.
8. The A/A/O pool of claim 1, which consists of an anaerobic pool, an anoxic pool and an aerobic pool, wherein the reflux ratio of sludge in the A/A/O pool is 60-100%, the reflux ratio of nitrifying liquid is 200-400%, and MLSS is 4000-6000 mg/L.
9. The anaerobic pond according to claim 8, wherein the dissolved oxygen concentration is less than 0.2mg/L and the hydraulic retention time is 3-5 h.
10. The anoxic tank of claim 8 wherein the dissolved oxygen concentration is less than 0.5mg/L and the hydraulic retention time is 8 to 12 hours.
11. The aerobic tank as claimed in claim 8, wherein the dissolved oxygen concentration is 2.0-3.5 mg/L and the hydraulic retention time is 19-30 h.
12. A secondary sedimentation tank as claimed in claim 1, wherein the hydraulic retention time of the secondary sedimentation tank is 9 to 14 hours.
13. The dephosphorization sedimentation tank according to claim 1, wherein the effluent TP of the dephosphorization sedimentation tank reaches the standard, the dosage of PFS is determined according to the specific water quality, and the dosage of PAM is 1-3 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210602670.5A CN115504620A (en) | 2022-05-30 | 2022-05-30 | Preserved szechuan pickle wastewater treatment process based on water pollutant discharge standard of preserved szechuan pickle industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210602670.5A CN115504620A (en) | 2022-05-30 | 2022-05-30 | Preserved szechuan pickle wastewater treatment process based on water pollutant discharge standard of preserved szechuan pickle industry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115504620A true CN115504620A (en) | 2022-12-23 |
Family
ID=84500658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210602670.5A Pending CN115504620A (en) | 2022-05-30 | 2022-05-30 | Preserved szechuan pickle wastewater treatment process based on water pollutant discharge standard of preserved szechuan pickle industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115504620A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161553A (en) * | 2011-03-04 | 2011-08-24 | 广东工业大学 | Method for treating wastewater generated in preparation of biogas from kitchen waste |
| CN103073159A (en) * | 2013-01-30 | 2013-05-01 | 南京绿岛环境工程有限公司 | Treatment process for tuber mustard waste water |
| CN106977055A (en) * | 2017-05-10 | 2017-07-25 | 舟山风扬环保科技有限公司 | A kind of seafood processing wastewater processing system and method for wastewater treatment |
| CN107176760A (en) * | 2017-06-26 | 2017-09-19 | 中电环保股份有限公司 | A kind of high salt advance for the treatment of process of cyanide-bearing effluent and processing system |
| CN206751618U (en) * | 2017-05-10 | 2017-12-15 | 舟山风扬环保科技有限公司 | A kind of seafood processing wastewater processing system |
| CN210237380U (en) * | 2019-05-06 | 2020-04-03 | 湖北岭上人家生态食品有限公司 | Waste water treatment device for pickles factory |
-
2022
- 2022-05-30 CN CN202210602670.5A patent/CN115504620A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161553A (en) * | 2011-03-04 | 2011-08-24 | 广东工业大学 | Method for treating wastewater generated in preparation of biogas from kitchen waste |
| CN103073159A (en) * | 2013-01-30 | 2013-05-01 | 南京绿岛环境工程有限公司 | Treatment process for tuber mustard waste water |
| CN106977055A (en) * | 2017-05-10 | 2017-07-25 | 舟山风扬环保科技有限公司 | A kind of seafood processing wastewater processing system and method for wastewater treatment |
| CN206751618U (en) * | 2017-05-10 | 2017-12-15 | 舟山风扬环保科技有限公司 | A kind of seafood processing wastewater processing system |
| CN107176760A (en) * | 2017-06-26 | 2017-09-19 | 中电环保股份有限公司 | A kind of high salt advance for the treatment of process of cyanide-bearing effluent and processing system |
| CN210237380U (en) * | 2019-05-06 | 2020-04-03 | 湖北岭上人家生态食品有限公司 | Waste water treatment device for pickles factory |
Non-Patent Citations (2)
| Title |
|---|
| 李宏罡等: "《精细化废水治理技术》", 31 October 2011, 华东理工大学出版社, pages: 121 * |
| 魏亮亮等: "《环境工程专业毕业设计指南 以城市排水工程设计为例》", 31 March 2021, 哈尔滨工业大学出版社, pages: 90 - 91 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101665636B1 (en) | Wastewater pretreatment method and sewage treatment method using the pretreatment method | |
| CN104961306B (en) | A kind of processing method of vaccary breeding wastewater | |
| CN108751625B (en) | Treatment system and process for fermentation antibiotic wastewater | |
| SG189695A1 (en) | Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods | |
| CN109574420B (en) | Reverse osmosis concentrated water treatment method and device | |
| CN103739173A (en) | Kitchen wastewater treatment method | |
| CN103342441B (en) | Erythromycin thiocyanate wastewater treatment method | |
| CN109205954A (en) | Light electrolysis catalysis oxidation, biochemical treatment high-concentration waste hydraulic art | |
| CN108383239B (en) | Integrated biological treatment process for shortcut nitrification anaerobic ammonia oxidation and phosphorus removal under intermittent aeration mode | |
| CN107840550B (en) | Method for treating garbage leachate | |
| CN107473370B (en) | Sewage treatment system and method combining membrane bioreactor and phosphorus recovery process | |
| CN115304208A (en) | Emulsion explosive production wastewater treatment method | |
| CN101186387A (en) | Method for increasing organism synchronous dephosphorization denitrogenation effect of sewage under anaerobic-hypoxia condition | |
| CN113526658A (en) | Device and method for treating sewage by rapid short-cut denitrification | |
| CN107151082B (en) | Zero-discharge treatment system and method for DMF (dimethyl formamide) -containing wastewater | |
| CN210237408U (en) | Poisonous waste water treatment equipment of resin production | |
| CN100400433C (en) | Strengthened primary treatment method for internal electrolyzing sewage through aeration and catalyzing iron | |
| CN105060622B (en) | Three mud and sewage carbon nitrogen phosphorus remove and sludge stabilization treatment method simultaneously | |
| CN115259578B (en) | Treatment method of antibiotic pharmaceutical wastewater | |
| CN109081509B (en) | Sewage treatment system and process suitable for low-carbon-nitrogen ratio and high-carbon-nitrogen ratio | |
| CN115108636B (en) | Adjustable hydrolysis acidification-aerobic granular sludge combined sewage treatment system and method | |
| CN104828942A (en) | New municipal wastewater nitrogen and phosphorus removal treatment process | |
| CN212687862U (en) | Cassava starch production sewage treatment system | |
| CN114085012A (en) | Organic wastewater treatment system and organic wastewater treatment method | |
| CN204550200U (en) | Municipal effluent denitrogenation dephosphorizing treatment system |
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 |