CN113233705B - Organic wastewater treatment equipment and method containing medium-long chain fatty acid - Google Patents
Organic wastewater treatment equipment and method containing medium-long chain fatty acid Download PDFInfo
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- CN113233705B CN113233705B CN202110541578.8A CN202110541578A CN113233705B CN 113233705 B CN113233705 B CN 113233705B CN 202110541578 A CN202110541578 A CN 202110541578A CN 113233705 B CN113233705 B CN 113233705B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 23
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 96
- 239000002351 wastewater Substances 0.000 claims abstract description 90
- 238000006243 chemical reaction Methods 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 230000003647 oxidation Effects 0.000 claims abstract description 57
- 230000003197 catalytic effect Effects 0.000 claims abstract description 52
- 230000004133 fatty acid degradation Effects 0.000 claims abstract description 41
- 239000007857 degradation product Substances 0.000 claims abstract description 40
- 238000005345 coagulation Methods 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 28
- 230000015271 coagulation Effects 0.000 claims abstract description 28
- 150000004668 long chain fatty acids Chemical class 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 22
- 150000004667 medium chain fatty acids Chemical class 0.000 claims abstract description 13
- 239000008213 purified water Substances 0.000 claims abstract description 13
- 238000005842 biochemical reaction Methods 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000004062 sedimentation Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 7
- 238000001223 reverse osmosis Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000000701 coagulant Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012716 precipitator Substances 0.000 claims description 4
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- 150000002505 iron Chemical class 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000010802 sludge Substances 0.000 description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000000370 acceptor Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000010806 kitchen waste Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- GYSCBCSGKXNZRH-UHFFFAOYSA-N 1-benzothiophene-2-carboxamide Chemical compound C1=CC=C2SC(C(=O)N)=CC2=C1 GYSCBCSGKXNZRH-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- AWQSAIIDOMEEOD-UHFFFAOYSA-N 5,5-Dimethyl-4-(3-oxobutyl)dihydro-2(3H)-furanone Chemical compound CC(=O)CCC1CC(=O)OC1(C)C AWQSAIIDOMEEOD-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- GHVNFZFCNZKVNT-UHFFFAOYSA-N Decanoic acid Natural products CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000012668 chain scission Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002921 fermentation waste Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000001760 fusel oil Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 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
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012546 transfer 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
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by 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
- 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
-
- 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
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- 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
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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses an organic wastewater treatment device and method containing medium-long chain fatty acid, wherein the device comprises the following components: the pretreatment device is used for collecting the organic wastewater containing the medium-long chain fatty acid and removing suspended matters to obtain pretreated organic wastewater; the ozone oxidation device is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain medium-long chain fatty acid degradation products; the anaerobic reaction device is used for carrying out anaerobic reaction on the medium-long chain fatty acid degradation product to obtain a first treatment liquid; the nitrification and denitrification device is used for performing nitrification and denitrification reaction on the first treatment liquid to obtain a second treatment liquid; and the coagulation device is used for dephosphorizing the second treatment liquid to obtain purified water with low, medium and long chain fatty acid content. The invention applies the ozone high-efficiency oxidation technology to degrade the medium-long chain fatty acid in the wastewater, and then carries out biochemical reaction, so that the degradation rate is high, the running cost of a wastewater treatment plant is reduced, and the stable standard-reaching running of the wastewater treatment is ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of organic wastewater treatment containing medium-long chain fatty acids, in particular to equipment and a method for treating organic wastewater containing medium-long chain fatty acids.
Background
Fat-containing waste water is very common in animal processing, edible oil processing and kitchen waste treatment waste water, has high concentration, and has low-concentration esters in some fermentation waste water, and if the waste water is not treated or is properly degraded, the waste water can seriously pollute the environment, and causes no small loss to enterprises. The waste water can be organic waste water produced by fermenting carbon monoxide or/and carbon dioxide gas to prepare alcohol, or waste water produced by a fermentation process taking kitchen waste as a substrate or other fermentation production processes. The medium-long chain fatty acid is a compound composed of three elements of carbon, hydrogen and oxygen. The medium-long chain fatty acid is fatty acid with carbon number above 7 in carbon chain, such as heptanoic acid, octanoic acid, decanoic acid, oleic acid, etc. The waste water is characterized by high COD (high inert COD), and the fatty acids have an inhibition effect on the activity of microorganisms, so that the removal efficiency of biochemical reaction can be influenced. The final result is that the anaerobic and aerobic reaction sludge has reduced activity and poor removal effect, so that the sludge with high activity is frequently added, the production cost and the labor intensity are high, and the sewage treatment operation index is unstable.
In practical engineering cases, the successful anaerobic reactor for treating the grease wastewater is almost not available, and experimental researches prove that the medium-long chain fatty acid can be adsorbed on the surface of the sludge in the anaerobic reactor, so that mass transfer is seriously influenced, the activity of the sludge is reduced, the treatment efficiency is reduced, and the transportation function of bacterial cell membranes is destroyed by the medium-long chain fatty acid to a certain extent, so that obvious toxicity is generated on the anaerobic sludge.
The fat-containing wastewater is not rare, but the inhibition of the middle-long chain fatty acid on the anaerobic sludge is not a practical engineering case, and a large amount of new anaerobic sludge is often added to ensure the operation of sewage treatment, so that the indexes are unstable.
Therefore, a set of treatment process suitable for the wastewater containing the medium-long chain fatty acid is researched, and the stable standard-reaching operation of the wastewater treatment is ensured. The technical problem to be solved is urgent.
Disclosure of Invention
The embodiment of the application is used for degrading the medium-long chain fatty acid in the wastewater by providing the organic wastewater treatment equipment containing the medium-long chain fatty acid, and carrying out biochemical reaction again, so that the stable standard-reaching operation of the wastewater treatment is ensured.
The application provides the following technical scheme through an embodiment of the application:
in a first aspect of an embodiment of the present invention, there is provided an organic wastewater treatment apparatus including medium-long chain fatty acids, including:
the pretreatment device is used for collecting the organic wastewater containing the medium-long chain fatty acid and removing suspended matters to obtain pretreated organic wastewater;
the ozone oxidation device is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain medium-long chain fatty acid degradation products;
the anaerobic reaction device is used for carrying out anaerobic reaction on the medium-long chain fatty acid degradation product to obtain a first treatment liquid;
the nitrification and denitrification device is used for performing nitrification and denitrification reaction on the first treatment liquid to obtain a second treatment liquid;
the coagulation device is used for dephosphorizing the second treatment liquid to obtain purified water with low, medium and long chain fatty acid content;
the pretreatment device, the ozone oxidation device, the anaerobic reaction device, the nitrification and denitrification device and the coagulation device are sequentially communicated.
Further, the ozone oxidation apparatus includes:
an ozone generating unit for obtaining ozone;
the catalytic oxidation tower is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain a medium-long chain fatty acid degradation product; the catalytic oxidation tower is communicated with the ozone generating unit;
and the oxidation buffer tank is used for collecting long-chain fatty acid degradation products, and is communicated with the catalytic oxidation tower.
Further, the ozone generating unit includes:
the air compressor is used for compressing air to obtain compressed air;
the oxygenerator is used for preparing the compressed air to obtain oxygen; the oxygenerator is communicated with the air compressor;
an ozone generator for carrying out oxidation reaction on the compressed air to obtain ozone mixed gas; the ozone generator is communicated with the oxygenerator.
Further, the preprocessing device includes:
the regulating tank is internally provided with a flocculating agent and a coagulant aid which are used for being put into the regulating tank;
one end of the ozone water inlet tank is communicated with the regulating tank, and the other end of the ozone water inlet tank is communicated with the ozone oxidation device.
Further, the anaerobic reaction device includes:
the anaerobic reactor is used for carrying out anaerobic biochemical reaction on the medium-long chain fatty acid degradation product to obtain a first mixed solution;
the inclined plate settler is used for carrying out first filtration on the first mixed liquid to obtain a first treatment liquid;
the ozone oxidation device, the anaerobic reactor, the inclined plate precipitator and the nitrification and denitrification device are sequentially communicated.
Further, the nitrification and denitrification device comprises a nitrification and denitrification tank, a secondary sedimentation tank and a filter which are sequentially communicated, wherein the filter comprises at least one of a sand filter and an activated carbon filter.
Further, the coagulation device comprises a coagulation sedimentation tank and ferric salt and flocculating agent which are used for adding the coagulation sedimentation.
Further, the organic wastewater treatment equipment containing the medium-long chain fatty acid further comprises a reverse osmosis device and an evaporation concentration device, and the coagulation device, the reverse osmosis device and the evaporation concentration device are sequentially communicated.
In a second aspect of the embodiments of the present invention, there is provided a method for treating organic wastewater containing long-chain fatty acids, the method comprising:
the pretreatment device is adopted to collect the organic wastewater containing the medium-long chain fatty acid and remove suspended matters to obtain pretreated organic wastewater;
the ozone oxidation device is adopted to carry out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst, so as to obtain medium-long chain fatty acid degradation products;
carrying out anaerobic reaction on the medium-long chain fatty acid degradation product by adopting the anaerobic reaction device to obtain a first treatment liquid;
performing nitrification and denitrification reaction on the first treatment liquid by adopting the nitrification and denitrification device to obtain a second treatment liquid;
and (3) dephosphorizing the second treatment liquid by adopting the coagulation device to obtain purified water with low, medium and long chain fatty acid content.
Further, the concentration of the ozone is 100-150mg/L; the mass ratio of the ozone to the pretreated organic wastewater is more than or equal to 300ppm in terms of the concentration of the parts by weight; the temperature of the catalytic oxidation reaction is 30-40 ℃, and the time of the catalytic oxidation reaction is 1-4h.
One or more technical solutions provided in the embodiments of the present application at least include the following technical effects or advantages:
the embodiment of the invention discloses equipment and a method for treating organic wastewater containing medium-long chain fatty acid, wherein the equipment comprises the following components: the pretreatment device is used for collecting the organic wastewater containing the medium-long chain fatty acid and removing suspended matters to obtain pretreated organic wastewater; the ozone oxidation device is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain medium-long chain fatty acid degradation products; the anaerobic reaction device is used for carrying out anaerobic reaction on the medium-long chain fatty acid degradation product to obtain a first treatment liquid; the nitrification and denitrification device is used for performing nitrification and denitrification reaction on the first treatment liquid to obtain a second treatment liquid; and the coagulation device is used for dephosphorizing the second treatment liquid to obtain purified water with low, medium and long chain fatty acid content. The application of the high-efficiency oxidation technology of ozone degrades the medium-long chain fatty acid in the wastewater, and then carries out biochemical reaction, so that the degradation rate is high, the running cost of a wastewater treatment plant is reduced, and the stable standard-reaching running of the wastewater treatment is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of an organic wastewater treatment device containing long-chain fatty acids according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for treating organic wastewater containing medium-long chain fatty acids according to an embodiment of the present invention;
the reference numerals are explained as follows:
1-a pretreatment device, 11-a regulating tank and 12-an ozone water inlet tank;
a 2-ozone oxidation device; a 21-ozone generating unit; 211-an air compressor; 212-an oxygenerator; 213-ozone generator; 22-a catalytic oxidation tower; a 23-oxidation buffer tank;
3-anaerobic reaction device, 31-anaerobic reactor, 32-sloping plate settler and 33-anaerobic water inlet pump;
4-nitrification and denitrification device and 41-nitrification and denitrification tank; 42-secondary sedimentation tank; 43-a filter;
5-coagulation device; 51-a coagulating sedimentation tank;
6-reverse osmosis unit;
7-evaporating and concentrating device.
Detailed Description
The advantages and various effects of the embodiments of the present invention will be more clearly apparent from the following detailed description and examples. Those skilled in the art will appreciate that these specific implementations and examples are provided to illustrate, but not limit, examples of the present invention.
Throughout the specification, unless specifically indicated otherwise, the terms used herein should be understood as meaning as commonly used in the art. Thus, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the invention belong. In case of conflict, the present specification will control.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, devices, etc., used in the examples of the present invention are commercially available or may be prepared by existing methods.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The embodiment of the application solves the technical problem that the prior art lacks a treatment process suitable for the wastewater containing the medium-long chain fatty acid by providing the organic wastewater treatment equipment containing the medium-long chain fatty acid.
The technical scheme of the embodiment of the application aims to solve the technical problems, and the overall thought is as follows:
as an exemplary embodiment of the present application, there is provided an organic wastewater treatment apparatus including medium-long chain fatty acids, as shown in fig. 1, including:
a pretreatment device 1 for collecting organic wastewater containing medium-long chain fatty acids and removing suspended matters to obtain pretreated organic wastewater;
the ozone oxidation device 2 is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain medium-long chain fatty acid degradation products;
the anaerobic reaction device 3 is used for carrying out anaerobic reaction on the medium-long chain fatty acid degradation product to obtain a first treatment liquid;
the nitrification and denitrification device 4 is used for performing nitrification and denitrification reaction on the first treatment liquid to obtain a second treatment liquid;
the coagulation device 5 is used for dephosphorizing the second treatment liquid to obtain purified water with low, medium and long chain fatty acid content;
the pretreatment device, the ozone oxidation device, the anaerobic reaction device, the nitrification and denitrification device and the coagulation device are sequentially communicated.
The embodiment of the application applies the ozone high-efficiency oxidation technology to degrade the medium-long chain fatty acid in the wastewater, and then carries out biochemical reaction, so that the degradation rate is high, the running cost of a wastewater treatment plant is reduced, and the stable standard-reaching running of the sewage treatment is ensured.
In the prior art, no equipment and no method for treating the organic wastewater containing the medium-long chain fatty acid exist, and the inventor of the application discovers that the following technical difficulties exist in the treatment of the organic wastewater containing the medium-long chain fatty acid through a large number of innovative experiments:
(1) Its presence inhibits microbial activity, if left untreated, requiring a large supplementation of microorganisms;
(2) If improperly treated in the pretreatment unit, subsequent microbial activity is inhibited;
(3) Too high a suspension can affect the effectiveness of ozone catalytic oxidation;
aiming at the technical difficulties, the strategy of the application is to oxidize and break chain and degrade the medium-long chain fatty acid before the wastewater enters the biochemical treatment, solve the technical problems through the ozone high-efficiency catalytic oxidation technology, and remove suspended matters before the ozone catalytic oxidation.
The working flow of the organic wastewater treatment equipment containing the medium-long chain fatty acid provided by the embodiment of the invention is as follows:
the pretreatment device 1 collects organic wastewater containing medium-long chain fatty acid and removes suspended matters to obtain pretreated organic wastewater;
the ozone oxidation device 2 carries out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain a medium-long chain fatty acid degradation product;
the anaerobic reaction device 3 performs anaerobic reaction on the medium-long chain fatty acid degradation product to obtain a first treatment liquid;
the nitrification and denitrification device 4 carries out nitrification and denitrification reaction on the first treatment liquid to obtain a second treatment liquid;
and the coagulation device 5 removes phosphorus from the second treatment liquid to obtain purified water with low, medium and long chain fatty acid content.
In this embodiment, the preprocessing device 1 includes:
the regulating tank 11 is internally provided with a flocculating agent and a coagulant aid which are used for being put into the regulating tank;
an ozone water inlet tank 12, one end of which is communicated with the regulating tank 11, and the other end of which is communicated with the ozone oxidation device.
In this embodiment, the ozone oxidation device 2 includes:
an ozone generating unit 21 for obtaining ozone;
a catalytic oxidation tower 22, configured to perform catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst, so as to obtain a medium-long chain fatty acid degradation product; the catalytic oxidation tower 22 is communicated with the ozone generating unit 21;
and the oxidation buffer tank 23 is used for collecting long-chain fatty acid degradation products, and the oxidation buffer tank 23 is communicated with the catalytic oxidation tower 22.
In the embodiment of the present application, the ozone generating unit 21 includes:
the air compressor 211 is used for compressing air to obtain compressed air;
an oxygenerator 212 for preparing the compressed air to obtain oxygen; the oxygenerator is communicated with the air compressor;
an ozone generator 213 for performing an oxidation reaction on the compressed air to obtain an ozone mixture; the ozone generator is communicated with the oxygenerator.
The ozone generating unit 21 further includes: a high efficiency oil remover 214 and a refrigerated compressed air dryer 215,
the air compressor 211, the efficient oil remover 214 and the refrigerating type compressed air dryer 215 are sequentially communicated. Air in the environment is compressed to more than 7bar by an air compressor, molecular sieve purification is carried out after dehydration and deoiling (deoiling adopts a high-efficiency deoiling device and dehydration adopts a freezing type compressed air dryer), and the air with the oxygen content of more than 90 percent is conveyed to an ozone generator 213 to prepare 100g/Nm of concentration 3 The above ozone mixture;
in the embodiment of the present application, the anaerobic reaction device 3 includes:
an anaerobic reactor 31 for performing anaerobic biochemical reaction on the medium-long chain fatty acid degradation product to obtain a first mixed solution;
a sloping plate settler 32 for performing a first filtration on the first mixed solution to obtain a first treatment solution;
the ozone oxidation device, the anaerobic reactor, the inclined plate precipitator and the nitrification and denitrification device are sequentially communicated.
In this embodiment, the catalytic oxidation tower 22 is provided with a feed inlet, an ozone inlet, a discharge outlet and an air outlet, and the feed inlet is communicated with the pretreatment device; the ozone inlet communicates with the outlet of the ozone generating unit 21. The catalytic oxidation tower 22 is internally provided with a distributor and a catalyst, so that the organic wastewater containing the medium-long chain fatty acid and the ozone mixed gas are subjected to catalytic oxidation reaction under the action of the catalyst to obtain the medium-long chain fatty acid degradation product.
The distributor specifically comprises a gas distributor and a liquid distributor, the catalyst is used for accelerating the oxidative decomposition of fusel oil, and the catalyst can be an iron-based catalyst. The amount of the catalyst varies according to the manufacturer of the catalyst, and the iron-based catalyst used in the embodiment of the present invention is commercially available, and the amount of the iron-based catalyst added is 1 cube.
The reaction formula or reaction mechanism of the catalytic oxidation reaction is specifically as follows: ozone can oxidize most organic matters, especially substances which are difficult to biochemically degrade, and the organic matters in water can be directly combined with O 3 Reaction or with O 3 In waterThe hydroxyl radical generated by decomposition is easier to generate under the action of a catalyst. The hydroxyl radical is very active, and the reaction rate with most organic matters is high, so that alcohol, ketone, organic acid and lipid substances which are difficult to decompose can be continuously oxidized or broken into short chains.
In the embodiment of the present application, the anaerobic reaction device 3 includes:
an anaerobic reactor 31 for performing anaerobic biochemical reaction on the medium-long chain fatty acid degradation product to obtain a first mixed solution;
a sloping plate settler 32 for performing a first filtration on the first mixed solution to obtain a first treatment solution;
the ozone oxidation device 2, the anaerobic reactor 31, the inclined plate precipitator 32 and the nitrification and denitrification device 4 are sequentially communicated.
In this embodiment, the nitrification and denitrification device 4 includes a nitrification and denitrification tank 41, a secondary sedimentation tank 42 and a filter 43 that are sequentially communicated, and the filter 43 includes at least one of a sand filter and an activated carbon filter.
In the embodiment of the present application, the coagulation device 5 includes a coagulation sedimentation tank 51 and an iron salt and a flocculating agent for adding the coagulation sedimentation.
In this embodiment, the organic wastewater treatment equipment that contains well long-chain fatty acid still includes reverse osmosis unit 6 and evaporation enrichment facility 7, coagulation unit 5 reverse osmosis unit 6 with evaporation enrichment facility 7 communicates in proper order.
As another exemplary embodiment of the examples of the present application, there is provided a method for treating organic wastewater containing long-chain fatty acids, as shown in fig. 2, the method comprising:
s1, collecting organic wastewater containing medium-long chain fatty acid by adopting the pretreatment device and removing suspended matters to obtain pretreated organic wastewater;
the concentration of suspended matters in the pretreated organic wastewater is lower than 100mg/L;
flocculant and coagulant aid are added to the pretreatment device to remove part of suspended matters, and the flocculant can be generally classified into inorganic flocculant and organic flocculant according to chemical components. Wherein the inorganic flocculant comprises an inorganic flocculant and an inorganic polymer flocculant; the organic flocculant also comprises a synthetic organic polymeric flocculant, a natural organic polymeric flocculant and a microbial flocculant; the inorganic flocculant comprises aluminum sulfate, aluminum chloride, ferric sulfate, ferric chloride and the like.
S2, carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst by adopting the ozone oxidation device to obtain a medium-long chain fatty acid degradation product;
the concentration of ozone in the ozone mixture is 100-150mg/L (the ozone concentration is not very high basically due to the characteristics of the equipment).
The mass ratio of the ozone to the pretreated organic wastewater is more than or equal to 300ppm; in this range, the catalyst can be subjected to sufficient catalytic oxidation reaction, and then chain scission into small molecular substances can be carried out, so that the medium-long chain fatty acid degradation product can be successfully obtained, and if the mass ratio is less than 300ppm, the catalytic oxidation reaction is difficult to complete, and the medium-long chain fatty acid is difficult to sufficiently degrade.
The temperature of the catalytic oxidation reaction is 30-40 ℃, and the time of the catalytic oxidation reaction is 1-4h. The temperature is too high or too low, so that the catalytic oxidation reaction is difficult to complete, and the medium-long chain fatty acid is difficult to fully degrade.
S3, carrying out anaerobic reaction on the medium-long chain fatty acid degradation product by adopting the anaerobic reaction device to obtain a first treatment liquid; the sludge in the anaerobic reactor can be flocculent sludge or granular sludge, and the mechanism of the anaerobic reaction is as follows: (1) hydrolysis stage: the macromolecular substances are decomposed into small molecules by extracellular enzymes in vitro. (2) acidification stage: the small molecule organics described above enter the cell body to be converted into simpler compounds and distributed outside the cell, the main product of this stage being Volatile Fatty Acids (VFA). (3) stage of acetic acid production: at this stage, the product of the previous step is further converted into acetic acid, carbonic acid, hydrogen and new cellular material. (4) methanogenesis stage: at this stage, acetic acid, hydrogen, carbonic acid, formic acid and methanol are all converted to methane, carbon dioxide and new cellular material. This stage is also an important stage of the overall anaerobic process and a rate limiting stage of the overall anaerobic reaction process.
S4, performing nitrification and denitrification reaction on the first treatment liquid by adopting the nitrification and denitrification device to obtain a second treatment liquid; the nitrification and denitrification reaction is to make NH under aerobic condition 4+ Conversion to NO 2 - And NO 3 - Is a process of (2). Nitrifying bacteria are autotrophic bacteria with low growth rate and sensitivity to environmental condition changes. The temperature, dissolved oxygen, sludge age, pH, organic load and the like will all affect the denitrifying bacteria heterotrophic facultative anaerobe, and when oxygen exists, the denitrifying bacteria heterotrophic facultative anaerobe can take the form of O 2 Respiration for electron acceptors; in the absence of oxygen with NO 3 - Or NO 2 - When present, then take the form of NO 3 - Or NO 2 - And (3) taking organic carbon as an electron donor and a nutrient source as an electron acceptor to carry out denitrification reaction, and finally forming nitrogen.
S5, dephosphorizing the second treatment liquid by adopting the coagulation device to obtain purified water with low, medium and long chain fatty acid content.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Example 1
An apparatus for treating organic wastewater containing medium-long chain fatty acids as shown in fig. 1, comprising:
a pretreatment device 1 for collecting organic wastewater containing medium-long chain fatty acids and removing suspended matters to obtain pretreated organic wastewater; the preprocessing device 1 includes:
the device comprises a regulating tank 11, wherein a flocculating agent and a coagulant aid which are used for being put into the regulating tank are arranged in the regulating tank 11;
an ozone water inlet tank 12, one end of which is communicated with the regulating tank 11, and the other end of which is communicated with an ozone oxidation device 2 described below.
The ozone oxidation device 2 is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain medium-long chain fatty acid degradation products; the ozone oxidation apparatus 2 includes:
an ozone generating unit 21 for obtaining ozone; the ozone generating unit 21 includes:
the air compressor 211 is used for compressing air to obtain compressed air;
an oxygenerator 212 for preparing the compressed air to obtain oxygen; the oxygenerator is communicated with the air compressor;
an ozone generator 213 for performing an oxidation reaction on the compressed air to obtain an ozone mixture; the ozone generator is communicated with the oxygenerator.
A catalytic oxidation tower 22, configured to perform catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst, so as to obtain a medium-long chain fatty acid degradation product; the catalytic oxidation tower 22 is communicated with the ozone generating unit 21;
and the oxidation buffer tank 23 is used for collecting long-chain fatty acid degradation products, and the oxidation buffer tank 23 is communicated with the catalytic oxidation tower 22.
The anaerobic reaction device 3 is used for carrying out anaerobic reaction on the medium-long chain fatty acid degradation product to obtain a first treatment liquid;
the nitrification and denitrification device 4 is used for performing nitrification and denitrification reaction on the first treatment liquid to obtain a second treatment liquid;
and the coagulation device 5 is used for dephosphorizing the second treatment liquid to obtain purified water with low, medium and long chain fatty acid content.
The method of using the apparatus for treating organic wastewater containing long-chain fatty acids shown in FIG. 1 will be further described with reference to FIG. 2.
S1, collecting organic wastewater containing medium-long chain fatty acid by adopting the pretreatment device and removing suspended matters to obtain pretreated organic wastewater;
s2, carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst by adopting the ozone oxidation device to obtain a medium-long chain fatty acid degradation product; the concentration of the ozone mixed gas is 140mg/L;
the mass ratio of the ozone to the pretreated organic wastewater is 600ppm; the temperature of the catalytic oxidation reaction is 35 ℃, and the time of the catalytic oxidation reaction is 3 hours;
s3, carrying out anaerobic reaction on the medium-long chain fatty acid degradation product by adopting the anaerobic reaction device to obtain a first treatment liquid;
s4, performing nitrification and denitrification reaction on the first treatment liquid by adopting the nitrification and denitrification device to obtain a second treatment liquid;
s5, dephosphorizing the second treatment liquid by adopting the coagulation device to obtain purified water with low, medium and long chain fatty acid content.
Example 2
The method of using the apparatus for treating organic wastewater containing long-chain fatty acids shown in FIG. 1 will be further described with reference to FIG. 2.
S1, collecting organic wastewater containing medium-long chain fatty acid by adopting the pretreatment device and removing suspended matters to obtain pretreated organic wastewater;
s2, carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst by adopting the ozone oxidation device to obtain a medium-long chain fatty acid degradation product; the concentration of the ozone mixed gas is 150mg/L;
the mass ratio of the ozone to the pretreated organic wastewater is 1000ppm; the temperature of the catalytic oxidation reaction is 35 ℃, and the time of the catalytic oxidation reaction is 5 hours;
s3, carrying out anaerobic reaction on the medium-long chain fatty acid degradation product by adopting the anaerobic reaction device to obtain a first treatment liquid;
s4, performing nitrification and denitrification reaction on the first treatment liquid by adopting the nitrification and denitrification device to obtain a second treatment liquid;
s5, dephosphorizing the second treatment liquid by adopting the coagulation device to obtain purified water with low, medium and long chain fatty acid content.
Example 3
The method of using the apparatus for treating organic wastewater containing long-chain fatty acids shown in FIG. 1 will be further described with reference to FIG. 2.
S1, collecting organic wastewater containing medium-long chain fatty acid by adopting the pretreatment device and removing suspended matters to obtain pretreated organic wastewater;
s2, carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst by adopting the ozone oxidation device to obtain a medium-long chain fatty acid degradation product; the concentration of the ozone mixed gas is 100mg/L;
the mass ratio of the ozone to the pretreated organic wastewater is 300ppm; the temperature of the catalytic oxidation reaction is 35 ℃, and the time of the catalytic oxidation reaction is 1h;
s3, carrying out anaerobic reaction on the medium-long chain fatty acid degradation product by adopting the anaerobic reaction device to obtain a first treatment liquid;
s4, performing nitrification and denitrification reaction on the first treatment liquid by adopting the nitrification and denitrification device to obtain a second treatment liquid;
s5, dephosphorizing the second treatment liquid by adopting the coagulation device to obtain purified water with low, medium and long chain fatty acid content.
Comparative example 1
In this comparative example, the mass ratio of the ozone to the pretreated organic wastewater was 100ppm, and the other steps were the same as in example 1.
Comparative example 2
In this comparative example, the mass ratio of the ozone to the pretreated organic wastewater was 2000ppm, and the other steps were the same as in example 1.
Experimental example 1
Recovery rates of recovery of fusel oils of example 1 and comparative example 1 were measured and counted as follows
TABLE 1
| Group of | Medium-long chain fatty acid degradation rate | Anaerobic COD removal rate | Running cost |
| Example 1 | 90％ | ＞85％ | 3.2 |
| Example 2 | 95％ | ＞85％ | 3.4 |
| Example 3 | 70％ | ＞80％ | 3.1 |
| Comparative example 1 | 20％ | ＜70％ | 4.7 |
| Comparative example 2 | ＞95％ | ＞85％ | 3.6 |
As can be seen from the data in table 1:
in comparative example 1, the mass ratio of the ozone to the pretreated organic wastewater is 100ppm, which is smaller than the range of the embodiment of the invention, and the defects of incomplete degradation of medium-long chain fatty acid, low removal rate of COD due to anaerobic and high cost caused by irregular addition of anaerobic sludge exist;
in comparative example 4, the mass ratio of the ozone to the pretreated organic wastewater is 2000ppm, which is greater than the range of the embodiment of the invention, and has the disadvantage of high running cost;
the embodiment 1-3 of the invention has the advantages of high degradation rate of medium-long chain fatty acid, high anaerobic COD removal rate and low running cost;
the technical solution in the embodiment of the present application at least includes the following technical effects or advantages:
according to the equipment and the method for treating the organic wastewater containing the medium-long chain fatty acid, disclosed by the embodiment of the invention, the ozone high-efficiency oxidation technology is applied to degrade the medium-long chain fatty acid in the wastewater, and then the biochemical reaction is carried out, so that the degradation rate is high, the running cost of a wastewater treatment plant is reduced, and the stable standard-reaching running of the sewage treatment is ensured.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, the embodiments of the present invention are intended to include such modifications and alterations insofar as they come within the scope of the embodiments of the invention as claimed and the equivalents thereof.
Claims (5)
1. A method for treating organic wastewater containing medium-long chain fatty acids by using an organic wastewater treatment device, characterized in that the organic wastewater treatment device comprises:
the pretreatment device is used for collecting the organic wastewater containing the medium-long chain fatty acid and removing suspended matters to obtain pretreated organic wastewater;
the ozone oxidation device is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain medium-long chain fatty acid degradation products;
the anaerobic reaction device is used for carrying out anaerobic reaction on the medium-long chain fatty acid degradation product to obtain a first treatment liquid;
the nitrification and denitrification device is used for performing nitrification and denitrification reaction on the first treatment liquid to obtain a second treatment liquid;
the coagulation device is used for dephosphorizing the second treatment liquid to obtain purified water with low, medium and long chain fatty acid content;
the pretreatment device, the ozone oxidation device, the anaerobic reaction device, the nitrification and denitrification device and the coagulation device are sequentially communicated;
the method comprises the following steps:
the pretreatment device is adopted to collect the organic wastewater containing the medium-long chain fatty acid and remove suspended matters to obtain pretreated organic wastewater;
the ozone oxidation device is adopted to carry out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst, so as to obtain medium-long chain fatty acid degradation products;
carrying out anaerobic reaction on the medium-long chain fatty acid degradation product by adopting the anaerobic reaction device to obtain a first treatment liquid;
performing nitrification and denitrification reaction on the first treatment liquid by adopting the nitrification and denitrification device to obtain a second treatment liquid;
dephosphorizing the second treatment liquid by adopting the coagulation device to obtain purified water with low, medium and long chain fatty acid content;
the concentration of suspended matters in the pretreated organic wastewater is lower than 100mg/L, and the concentration of ozone is 100-150mg/L; the mass ratio of the ozone to the pretreated organic wastewater is more than or equal to 300ppm in terms of the concentration of the parts by weight; the temperature of the catalytic oxidation reaction is 30-40 ℃, and the time of the catalytic oxidation reaction is 1-4h;
the ozone oxidation apparatus includes:
an ozone generating unit for obtaining ozone;
the catalytic oxidation tower is used for carrying out catalytic oxidation reaction on the pretreated organic wastewater and ozone under the action of a catalyst to obtain a medium-long chain fatty acid degradation product; the catalytic oxidation tower is communicated with the ozone generating unit;
the oxidation buffer tank is used for collecting long-chain fatty acid degradation products, and is communicated with the catalytic oxidation tower;
the ozone generating unit includes:
the air compressor is used for compressing air to obtain compressed air;
the oxygenerator is used for preparing the compressed air to obtain oxygen; the oxygenerator is communicated with the air compressor;
an ozone generator for carrying out oxidation reaction on the compressed air to obtain ozone mixed gas; the ozone generator is communicated with the oxygenerator;
the anaerobic reaction device comprises:
the anaerobic reactor is used for carrying out anaerobic biochemical reaction on the medium-long chain fatty acid degradation product to obtain a first mixed solution;
the inclined plate settler is used for carrying out first filtration on the first mixed liquid to obtain a first treatment liquid;
the ozone oxidation device, the anaerobic reactor, the inclined plate precipitator and the nitrification and denitrification device are sequentially communicated.
2. The method for treating organic wastewater according to claim 1, wherein the pretreatment device comprises:
the regulating tank is internally provided with a flocculating agent and a coagulant aid which are used for being put into the regulating tank;
one end of the ozone water inlet tank is communicated with the regulating tank, and the other end of the ozone water inlet tank is communicated with the ozone oxidation device.
3. The method for treating organic wastewater according to claim 1, wherein the nitrification and denitrification device comprises a nitrification and denitrification tank, a secondary sedimentation tank and a filter, which are sequentially communicated, and the filter comprises at least one of a sand filter and an activated carbon filter.
4. The method of organic wastewater treatment according to claim 1, wherein the coagulation device comprises a coagulation sedimentation tank and an iron salt and a flocculant for adding the coagulation sedimentation.
5. The method for treating organic wastewater according to claim 1, wherein the apparatus for treating organic wastewater containing medium-long chain fatty acids further comprises a reverse osmosis device and an evaporation concentration device, and the coagulation device, the reverse osmosis device and the evaporation concentration device are sequentially connected.
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| EP1188720A1 (en) * | 2000-09-16 | 2002-03-20 | Diddens, Wilfried | Installation for the separation of grease and water in sewage |
| WO2013010388A1 (en) * | 2011-07-21 | 2013-01-24 | 波鹰(厦门)科技有限公司 | Apparatus for treating landfill leachate and treatment method therefor |
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| EP1188720A1 (en) * | 2000-09-16 | 2002-03-20 | Diddens, Wilfried | Installation for the separation of grease and water in sewage |
| WO2013010388A1 (en) * | 2011-07-21 | 2013-01-24 | 波鹰(厦门)科技有限公司 | Apparatus for treating landfill leachate and treatment method therefor |
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