CN116495927A - Advanced treatment process for waste emulsion - Google Patents
Advanced treatment process for waste emulsion Download PDFInfo
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- CN116495927A CN116495927A CN202310550473.8A CN202310550473A CN116495927A CN 116495927 A CN116495927 A CN 116495927A CN 202310550473 A CN202310550473 A CN 202310550473A CN 116495927 A CN116495927 A CN 116495927A
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- treatment
- waste emulsion
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- bentonite
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- 239000000839 emulsion Substances 0.000 title claims abstract description 123
- 239000002699 waste material Substances 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000008569 process Effects 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 239000003463 adsorbent Substances 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 230000007062 hydrolysis Effects 0.000 claims abstract description 13
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000008394 flocculating agent Substances 0.000 claims abstract description 11
- 239000000706 filtrate Substances 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 230000001376 precipitating effect Effects 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 61
- 229920001661 Chitosan Polymers 0.000 claims description 47
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 34
- 239000000440 bentonite Substances 0.000 claims description 28
- 229910000278 bentonite Inorganic materials 0.000 claims description 28
- 238000002360 preparation method Methods 0.000 claims description 28
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 22
- 239000004005 microsphere Substances 0.000 claims description 19
- 229920002401 polyacrylamide Polymers 0.000 claims description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 18
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 16
- 239000012752 auxiliary agent Substances 0.000 claims description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 13
- 239000001110 calcium chloride Substances 0.000 claims description 13
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 13
- 238000005189 flocculation Methods 0.000 claims description 13
- 230000016615 flocculation Effects 0.000 claims description 12
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 229910052680 mordenite Inorganic materials 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 7
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000679 carrageenan Substances 0.000 claims description 6
- 229920001525 carrageenan Polymers 0.000 claims description 6
- 229940113118 carrageenan Drugs 0.000 claims description 6
- 235000010418 carrageenan Nutrition 0.000 claims description 6
- 238000006056 electrooxidation reaction Methods 0.000 claims description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 6
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 claims description 6
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 3
- 230000003311 flocculating effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 36
- 239000003921 oil Substances 0.000 description 33
- 230000000052 comparative effect Effects 0.000 description 16
- 239000002245 particle Substances 0.000 description 16
- 238000001179 sorption measurement Methods 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000000084 colloidal system Substances 0.000 description 11
- 239000012535 impurity Substances 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000010865 sewage Substances 0.000 description 7
- 235000013162 Cocos nucifera Nutrition 0.000 description 6
- 244000060011 Cocos nucifera Species 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 230000020477 pH reduction Effects 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 239000010431 corundum Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000009300 dissolved air flotation Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 239000012874 anionic emulsifier Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 238000000861 blow drying Methods 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydroxide ions Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000012875 nonionic emulsifier Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000867 polyelectrolyte Polymers 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005588 protonation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/54—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
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The application relates to the technical field of waste emulsion treatment, and particularly discloses a waste emulsion advanced treatment process. The advanced treatment process of the waste emulsion comprises the following steps: separating oil from the waste emulsion, precipitating, filtering to obtain filtrate, and delivering the filtrate into an adjusting tank to obtain a first treatment liquid; acidifying and electroflocculating the first treatment liquid to obtain a second treatment liquid; adding a treatment agent into the treatment liquid II, mixing, dissolving air, carrying out air floatation, precipitating and filtering to obtain a treatment liquid III; carrying out electrocatalytic oxidation on the treatment fluid III to obtain a treatment fluid IV; the treatment solution IV is subjected to hydrolysis treatment, facultative treatment, anaerobic treatment, aerobic treatment and MBR membrane treatment to obtain treatment solution V; mixing the treatment liquid V with a flocculating agent and an adsorbent to obtain a treatment liquid V; and (3) carrying out water quality detection on the treatment liquid six, and discharging after reaching the standard. The waste emulsion treated by the advanced treatment process of the waste emulsion has lower COD, oil and suspended matter content, and reaches the water quality emission standard.
Description
Technical Field
The application relates to the technical field of waste emulsion treatment, in particular to a waste emulsion advanced treatment process.
Background
The emulsion has the functions of cooling, lubricating, cleaning, rust prevention and the like, is mainly composed of 2-10% of mineral oil, anionic or nonionic emulsifier, additives (chlorine, sulfur, phosphorus and the like) and water, and is easy to deteriorate after the working procedures of cold rolling, broaching, reaming, polishing, leveling, cutting and the like, so that the emulsion becomes waste emulsion.
When the waste emulsion is directly discharged into water, the oil substances in the waste emulsion float on the water surface to form an oil film, so that oxygen in the air is prevented from dissolving in the water, aquatic organisms are dead due to oxygen deficiency, and finally, the water body is deteriorated, and the environment is polluted. In addition, the waste emulsion contains the surfactant, so that the waste emulsion is uniformly dispersed in water and is easier to be absorbed by animals, plants and aquatic organisms, thereby affecting the growth of the animals, plants and aquatic organisms. The waste emulsion contains the surfactant, so that the combination of oil molecules and water molecules is firm, and the treatment of the waste emulsion is difficult to reach the emission standard.
At present, waste emulsion is mainly treated by a sedimentation method, an ultrafiltration method and the like, and the sedimentation method is mainly used for simply separating oil from water by adding a demulsifier to obtain upper-layer floating oil, and the process is simple, but treated water often cannot reach the discharge standard; the ultrafiltration method realizes the purpose of oil-water separation through the filtration effect of a small-aperture membrane, but the traditional ultrafiltration membrane has lower treatment flux and is difficult to solve the problem of membrane blockage.
The current treatment process of the waste emulsion concentrates on the separation of oil and water, but the control of COD and suspended matters of the effluent is not emphasized, so that the discharge standard is not met.
Therefore, how to provide a waste emulsion treatment process to reduce the content of oil, COD and suspended matters in the treated waste emulsion is a current urgent problem to be solved.
Disclosure of Invention
In order to reduce the content of COD, oil and suspended matters in the treated waste emulsion, the application provides a waste emulsion advanced treatment process.
The application provides a waste emulsion advanced treatment process, which adopts the following technical scheme:
a waste emulsion advanced treatment process comprises the following steps:
(1) Pretreatment: separating oil from the waste emulsion, precipitating, filtering to obtain filtrate, and delivering the filtrate into an adjusting tank to obtain a first treatment liquid;
(2) Acidifying: acidifying and electrically flocculating the treatment fluid I in the step (1) to obtain treatment fluid II;
(3) Flocculation: adding a treatment agent into the treatment liquid II obtained in the step (2), mixing, dissolving, air-floating, then precipitating and filtering to obtain a treatment liquid III, wherein the treatment agent is mainly prepared from the following raw materials in parts by weight: 2-4 parts of liquid alkali, 7-9 parts of polyaluminium chloride, 0.1-0.5 part of polyacrylamide and 0.2-0.5 part of calcium chloride;
(4) Electro-oxidation: carrying out electrocatalytic oxidation on the treatment fluid III obtained in the step (3) to obtain a treatment fluid IV;
(5) Biological treatment: sequentially carrying out hydrolysis treatment, facultative treatment, anaerobic treatment, aerobic treatment and MBR membrane treatment on the treatment solution IV obtained in the step (4) to obtain a treatment solution V;
(6) Deep treatment: mixing the treatment liquid five obtained in the step (5) with a flocculating agent and an adsorbent to obtain treatment liquid six;
(7) And (3) water quality detection: and (3) performing water quality detection on the treatment liquid six obtained in the step (6), and discharging after reaching the standard.
Preferably, the dissolved air flotation adopts a pressurized dissolved air flotation method, and the grain size of bubbles is controlled to be 10-15 mu m.
Preferably, the anaerobic treatment in step (5) is carried out for 5-7 hours; and (3) carrying out hydrolysis treatment for 6-8h.
By adopting the technical scheme, the method and the device have the advantages that the steps of oil separation, precipitation, acidification, flocculation, electrooxidation, biological treatment, adsorption and the like are sequentially carried out, so that the treatment effect of the waste emulsion is improved, the harmless treatment and zero emission of the waste emulsion are realized, and the treated effluent can be directly discharged or can be recycled as reuse water; wherein, the liquid crystal display device comprises a liquid crystal display device,
the waste emulsion in the step (1) is pretreated, so that the oil content in the waste emulsion is reduced, and meanwhile, through preliminary filtration, the large particle impurities in the waste emulsion are reduced, and the treatment efficiency and the treatment effect of the waste emulsion are further improved;
the step (2) is convenient for acid precipitation of the waste emulsion, and after the acid precipitation of the waste emulsion, part of impurities in the waste emulsion are converted from a colloid state to a suspension state, so that the impurities in the waste emulsion can be better cleaned in the later treatment step;
step (3) the waste emulsion is mixed with the treatment agent, and liquid alkali, polyaluminium chloride and the like in part of the treatment agent are mutually matched to improve the demulsification effect, the density of substances after demulsification is greater than that of water, and solid-liquid separation can be realized through simple precipitation, so that solidified impurities in the waste emulsion are further reduced; the addition of a part of treatment agent makes emulsified oil and colloid pollutants in the waste emulsion generate coagulation copolymerization demulsification, so that the stability of molecular charges in the emulsion is weakened, the same charge quantity carried by emulsion molecules is reduced, and simultaneously, countless tiny bubbles are added into the emulsion and collide with coagulated flocs adsorbing tiny oil beads to generate coacervation, so that a copolymer of the bubbles and the flocs is formed, the density of the copolymer is less than the density of a water body, and the copolymer floats upwards, thereby being convenient for further removing floating oil on water;
step (4) electro-oxidation is carried out by utilizing a strong electric field to further open the ring, break the bond and detoxify organic matters in the sewage so as to carry out subsequent biochemical treatment better;
step (5) performing biochemical treatment on the waste emulsion, hydrolyzing the waste emulsion, then entering a facultative tank, then entering an anaerobic tank, fully mixing the waste emulsion with mixed liquid reflowed in an aerobic tank in the anaerobic tank, decomposing macromolecular long-chain organic matters into micromolecular organic matters which are easy to be subjected to biochemical degradation, and performing denitrification reaction; sequentially conveying the wastewater into a facultative tank and an anaerobic tank, ammonifying, hydrolyzing and acidifying the organic matters by utilizing the organic matters in the wastewater and biological bacteria in a biochemical system, and then flowing into an aerobic tank to remove the organic matters by utilizing aerobic biosynthesis and mineralization;
and (6) adding a flocculating agent and an adsorbent into the treated waste emulsion to further reduce impurities in water and reduce the contents of COD, oil and suspended matters in sewage.
Preferably, air is introduced during the mixing process in the step (3).
By adopting the technical scheme, air is introduced into the waste emulsion added with the treatment agent, so that collision opportunities and times of colloid impurity particles in water and colloid groups formed by hydrolysis of raw materials in the treatment agent are further promoted; the impurities in the water lose stability under the action of the treatment agent, then mutually agglomerate into particles with larger size, then precipitate, and are separated after filtration.
Preferably, the heating treatment is carried out in the mixing process of the step (3), wherein the heating temperature is 40-45 ℃ and the heating time is 20-25min.
Through adopting above-mentioned technical scheme, with the heating of handling medicament and useless emulsion mixing in-process, be convenient for handle the better dispersion of medicament in the useless emulsion to better clearance organic micelle and inorganic micelle in the useless emulsion improve the treatment effect of useless emulsion.
Preferably, the mass ratio of the flocculating agent to the adsorbent in the step (6) is (2-3) (0.01-6).
Preferably, the mass ratio of the flocculant to the adsorbent is (2-3) to (5-6).
By adopting the technical scheme, the mass ratio of the two components of the flocculant and the adsorbent is adjusted, so that the mass ratio of the two components of the flocculant and the adsorbent is optimal, and the synergistic effect between the flocculant and the adsorbent can be better exerted; the coagulant and the flocculant are adopted to treat the waste emulsion, so that the removal rate of indexes such as COD, oil content and the like of the waste emulsion is higher.
Preferably, the flocculant consists of (1-2) of polyaluminium chloride, (0.05-0.1) of polyacrylamide and (1-2) of calcium chloride in a mass ratio.
Preferably, the molecular weight of the polyacrylamide is 400 ten thousand.
By adopting the technical scheme, the flocculant is prepared by compounding three components of polyaluminium chloride, polyacrylamide and calcium chloride, and the proportion of the three components is adjusted so as to ensure that the proportion of the three components is optimal, wherein the three components are mixed together to form the flocculant; sequentially adding polyaluminium chloride and polyacrylamide for chemical coagulation treatment, and degrading refractory organic matters through hydroxyl radicals to improve the precipitation of inorganic colloid particles and organic particles in the waste emulsion; in addition, particles in the wastewater are negatively charged, and calcium ions in the calcium chloride play roles in electrically neutralizing and compressing an electric double layer, so that the Zeta potential of the particles is reduced, the repulsive force is reduced, and the particles are combined into small flocs; at this time, polyacrylamide and polyaluminium chloride are added, and the high molecular long chains of the polyacrylamide and polyaluminium chloride are adsorbed with the small floccule particles, so that the small floccules are connected into large floccules through the high molecular long chains, namely, the adsorption bridging effect of the high molecular flocculant is achieved, the floccule particles become large as a result of the effect, and more pollutants are carried through the rolling sweeping effect in the sedimentation process of the large floccules, so that the treatment effect is improved.
Preferably, the adsorbent consists of (3-5): 6-8): 1-2 by mass of activated carbon powder, chitosan microspheres and mordenite.
Preferably, the preparation method of the activated carbon powder comprises the following steps: putting the coconut shells into a corundum ark, putting the corundum ark into a tube furnace, and carbonizing under the protection of nitrogen to obtain pretreated coconut shells; mixing coconut shell, potassium carbonate and water, drying, heating to a certain temperature under the protection of nitrogen, preserving heat, cooling, taking out, grinding, soaking in hydrochloric acid, washing with boiled distilled water to neutrality, and drying.
By adopting the technical scheme, the adsorbent is prepared by compounding three components of activated carbon powder, chitosan microspheres and mordenite, the proportion of the three components is adjusted, so that the proportion of the three components is optimal, the three components of the activated carbon powder, the chitosan microspheres and the mordenite are in synergistic effect with a flocculating agent, the activated carbon in the adsorbent is matched with the mordenite so as to remove suspended matters in water, part of chitosan is wrapped on the outer layer of the activated carbon, the chitosan and the flocculating agent flocculate firstly, then the activated carbon and the mordenite adsorb flocculated colloid particles, and the activated carbon and the mordenite are matched synergistically, so that the treatment effect on impurities in sewage is improved, and the pollutant content in the treated waste emulsion is further reduced; the activated carbon is used as a porous carbon material and has the advantages of large specific surface area, rich pores, stable physicochemical properties, strong adsorption and oxidation resistance and the like;
the chitosan contains amido, amino and hydroxyl in the molecule, and under the acidic condition, the chitosan shows the property of cationic polyelectrolyte along with the protonation of the amino, so that the chitosan not only has chelating adsorption effect on heavy metals, but also can effectively adsorb fine particles with negative charges in water;
mordenite is a porous aluminosilicate mineral, and has unique crystal structure, so that it has the characteristics of selective ion exchange property, selective adsorption property, acid resistance and catalytic property, and has large specific surface area, so that it is convenient for adsorbing organic matter, oil and colloid particles in waste emulsion.
Preferably, the chitosan microsphere is a modified chitosan microsphere, and the preparation method of the modified chitosan microsphere comprises the following steps: s1, pretreatment of chitosan: dissolving chitosan, adding ferroferric oxide, carrageenan and glutaraldehyde, and mixing to obtain pretreated chitosan; s2, mixing the pretreated chitosan obtained in the step S1 with fly ash under microwaves to obtain the chitosan.
Preferably, the fly ash is sulfuric acid treated.
By adopting the technical scheme, ferroferric oxide, carrageenan and glutaraldehyde are mixed with chitosan, so that the viscoelasticity and the crosslinking property of the chitosan are improved, the ferroferric oxide is convenient for the chitosan to have certain magnetism, and metal ions in the waste emulsion are reduced through chelation, electrostatic adsorption, physical adsorption and the like; the carrageenan and glutaraldehyde are subjected to physical crosslinking and chemical crosslinking, so that the modified chitosan has a stable three-dimensional network structure, and the adsorption performance and flocculation performance of the chitosan are further improved; the addition of the fly ash is convenient for further improving the porosity of the chitosan, thereby improving the adsorption effect of the chitosan.
Preferably, the activated carbon powder is modified activated carbon, and the preparation method of the modified activated carbon comprises the following steps: soaking activated carbon in phosphoric acid, oscillating, drying, performing heat treatment to obtain pretreated activated carbon, washing the pretreated activated carbon with water, filtering, and drying.
By adopting the technical scheme, the catalytic degradation effect of the phosphoric acid enables H and O in the activated carbon to be released in the form of water, so that pores are further left in the activated carbon, and the oxidation resistance effect of the phosphoric acid can effectively protect the carbon body of the activated carbon from being burnt at high temperature to cause collapse of internal pores; in addition, the phosphoric acid is convenient for increasing the number of acidic functional groups on the activated carbon, thereby improving the hydrophilicity and ion exchange capacity of the activated carbon and improving the adsorption capacity of the activated carbon.
Preferably, the treatment agent in the step (3) also comprises 3-5 parts of auxiliary agents, wherein the auxiliary agents consist of cerium nitrate, bentonite and potassium carbonate according to the mass ratio of (3-5) (1-2).
By adopting the technical scheme, the addition of the auxiliary agent is favorable for being matched with the polyaluminium chloride, the polyacrylamide and the calcium chloride in the treatment agent, so that the cleaning effect on colloid particles and other impurities in the waste emulsion is improved; the added auxiliary agent is prepared by compounding three components of cerium nitrate, bentonite and potassium carbonate, and the proportion of the three components is adjusted so as to ensure that the proportion of the three components reaches the best, thereby being beneficial to further improving the treatment effect of the waste emulsion; wherein:
the radius of cerium element particles in the cerium nitrate is smaller, so that the ultrafine particles can be adsorbed conveniently; the cerium element has a special outer-layer electronic structure, and the 4f orbit has 7 backup valence electronic orbitals with bond forming capability, so that a reaction similar to chemical bonds is formed in the flocculation process, thereby being convenient for enhancing the adsorption and flocculation effects; the water-soluble bentonite and the potassium carbonate are convenient to be matched with each other, and the removal effect of COD is improved;
the potassium carbonate is a strong alkali weak acid salt, the aqueous solution is alkaline, potassium ions hydrolyzed by the potassium carbonate neutralize negative charges on the surfaces of colloid particles in the sewage, and bicarbonate ions and hydroxide ions are generated at the same time, so that the formation of polyacrylamide bridging can be further promoted, and the colloid particles in the sewage are further flocculated, so that the colloid particles in the sewage are further reduced;
bentonite can be used as a suspending agent, so that better flocculation of polyaluminium chloride and polyacrylamide is facilitated.
Preferably, the bentonite is modified bentonite, and the preparation method of the modified bentonite comprises the following steps: mixing bentonite, cetyl trimethyl ammonium bromide and water, stirring at constant temperature, carrying out suction filtration, washing, drying and grinding to obtain pretreated bentonite; activating and grinding the pretreated bentonite to obtain the bentonite.
By adopting the technical scheme, the bentonite has extremely strong hydrophilicity due to the surface silica lamellar structure, the larger specific surface area and the cation exchange capacity, but interlayer cations have hydrolysis effect, so that the adsorption performance of the bentonite on organic wastewater is affected; the interlayer spacing increases with increasing addition of hexadecyltrimethyl, contributing to further improving the treatment effect of the treatment agent.
In summary, the present application has the following beneficial effects:
1. the advanced treatment process of the waste emulsion sequentially comprises a plurality of steps of pretreatment, acidification, flocculation, electrooxidation, biological treatment and advanced treatment, and the steps are combined and practical, so that the COD value, the oil content and the suspended matter content in the waste emulsion are reduced, the quality of effluent is improved, and the influence of the discharge of the treated waste emulsion on the surrounding environment is reduced.
2. The advanced treatment process for the waste emulsion has the advantages of simplicity and high efficiency in operation, good treatment effect, strong adaptability and the like, and is convenient for treating a large amount of waste emulsion.
Detailed Description
The present application is described in further detail below with reference to examples.
In the embodiment of the application, the COD value in the waste emulsion is 100000-600000mg/L, and the PH is 6-9; the oil content is 10000-60000mg/L, and the suspended substance concentration is 10000-30000mg/L.
The throughput of the waste emulsion in the examples of this application was 67t/d.
Preparation example of treatment agent
Preparation example 1: a treatment agent, comprising the following raw materials by weight: 2kg of liquid alkali, 7kg of polyaluminum chloride, 0.1kg of polyacrylamide and 0.2kg of calcium chloride. Wherein the liquid alkali is sodium hydroxide solution, and the mass fraction is 20%.
Preparation example 2: a treatment agent, comprising the following raw materials by weight: 4kg of liquid alkali, 9kg of polyaluminum chloride, 0.5kg of polyacrylamide and 0.5kg of calcium chloride. Wherein the liquid alkali is sodium hydroxide solution, and the mass fraction is 20%.
Preparation example 3: a treatment agent, comprising the following raw materials by weight: 4kg of liquid alkali, 9kg of polyaluminium chloride, 0.5kg of polyacrylamide, 0.5kg of calcium chloride and 4kg of auxiliary agent, wherein the auxiliary agent consists of cerium nitrate, bentonite and potassium carbonate according to the mass ratio of 3:1:1. Wherein the liquid alkali is sodium hydroxide solution, and the mass fraction is 20%.
Preparation example 4: a treatment agent, comprising the following raw materials by weight: 4kg of liquid alkali, 9kg of polyaluminium chloride, 0.5kg of polyacrylamide, 0.5kg of calcium chloride and 5kg of auxiliary agent, wherein the auxiliary agent consists of cerium nitrate, bentonite and potassium carbonate according to the mass ratio of 5:2:2. Wherein the liquid alkali is sodium hydroxide solution, and the mass fraction is 20%.
Preparation example 5: a treatment agent is different from preparation example 4 in that: the bentonite is modified bentonite, and the preparation method of the modified bentonite comprises the following steps: mixing bentonite, cetyltrimethylammonium bromide and water according to a mass ratio of 1:5:20, stirring at a constant temperature of 50 ℃, and carrying out suction filtration, water washing, drying and grinding to obtain pretreated bentonite; activating pretreated bentonite at 105deg.C for 2 hr, and grinding.
Preparation example 6: a treatment agent is different from the preparation example 1 in that: no liquid alkali was added.
Preparation example 7: a treatment agent is different from the preparation example 1 in that: equal amount of polyacrylamide is used to replace polyaluminum chloride.
Examples
Example 1: a waste emulsion advanced treatment process comprises the following steps:
(1) Pretreatment: separating oil from the waste emulsion, precipitating, filtering to obtain filtrate, and delivering the filtrate into an adjusting tank to obtain a first treatment liquid; the middle oil separating step is to introduce the waste emulsion into an oil separating tank, skim the free floating oil carried in the waste emulsion by adopting an oil skimmer, then convey the separated floating oil to a sedimentation tank, intercept and filter the separated floating oil by adopting a grid net so as to filter out massive solid impurities;
(2) Acidifying: acidifying and electrically flocculating the treatment fluid I in the step (1) to obtain treatment fluid II; wherein, acidification is carried out in an acidification tank, the pH value in the acidification tank is regulated to be 3 by sulfuric acid, and the treatment liquid self-flows into an electric flocculation tank from the acidification tank for demulsification; the pH after demulsification is 6;
(3) Flocculation: adding a treatment agent into the treatment liquid II obtained in the step (2), mixing, performing dissolved air floatation, enabling flocks generated in the coagulation process to carry floating oil out of the water surface, carrying the floating oil out by an oil carrying machine, treating, directly conveying the coagulated mud water mixture to a plate-and-frame filter press 1# for filter pressing by a screw pump, and treating filter residues after secondary pressing and blow-drying of a plate frame; the filtrate is a treatment fluid III; wherein the treatment agent is prepared by adopting a preparation example 1; mixing in a coagulation tank; the dosage of the treatment agent is 0.185 t/ton of waste emulsion treated; wherein, the dissolved air floatation adopts a pressurized dissolved air floatation method, and the grain diameter of bubbles is controlled to be 13 mu m; heating treatment is carried out in the mixing process, wherein the heating temperature is 45 ℃, and the heating time is 25min;
(4) Electro-oxidation: carrying out electrocatalytic oxidation on the treatment fluid III obtained in the step (3) to obtain a treatment fluid IV; wherein, electrocatalytic oxidation adopts electrocatalytic oxidation equipment;
(5) Biological treatment: sequentially carrying out hydrolysis treatment, facultative treatment, anaerobic treatment, aerobic treatment and MBR membrane treatment on the treatment solution IV obtained in the step (4) to obtain a treatment solution V; wherein, the hydrolysis treatment is that the hydrolysis treatment sequentially passes through a hydrolysis reactor 1 and a hydrolysis reactor 2, the pH value in the hydrolysis reactor 1 is 7, and the DO is 0.5mg/L; the pH in hydrolysis reactor 2 was 6 and DO was 0.4mg/L; the aerobic treatment is that the sewage passes through an aerobic tank 1, an aerobic tank 2 and an aerobic tank 3 in sequence; anaerobic is carried out in an anaerobic tank; the operation parameters of the facultative tank are as follows: the pH is 6.5-8, and the hydraulic retention time is 3.5h; the operation parameters of the anaerobic tank are as follows: the pH is 6.5-7.8, the temperature is 32-35 ℃, and the BOD5 is N, P=200-300; the operation parameters of the aerobic tank are as follows: the pH is 6.5-8.5, the temperature is 28-30 ℃, DO=2-4 mg/L, intermittent aeration is carried out, and the stuffiness and exposure time is not less than 8h; the operating parameters of the MBR membrane biological reaction tank are as follows: the pH value is 7-7.5, the temperature is 30-35 ℃, the sludge concentration is 6-9g/L, and the aeration amount is 0.025m 3 /min, sludgeThe load is 0.2-0.25 kgCOD/(kgMLSS.d), the hydraulic retention time is 48h, and the sludge age (SRT) is 30d;
(6) Deep treatment: mixing the treatment liquid five obtained in the step (5) with a flocculating agent and an adsorbent to obtain treatment liquid six; the flocculant consists of polyaluminium chloride, polyacrylamide and calcium chloride according to the mass ratio of 1:0.05:1, and the adding amount is 0.426 t/treating per ton of waste emulsion; the adsorbent is activated carbon powder, and the adding amount is 0.238 kg/ton of waste emulsion treated; the mass ratio of the flocculant to the adsorbent is 2:0.01; the preparation method of the activated carbon powder comprises the following steps: putting the coconut shells into a corundum ark, putting the corundum ark into a tube furnace, and carbonizing under the protection of nitrogen to obtain pretreated coconut shells; mixing coconut shells, potassium carbonate and water, drying, heating to 800 ℃ under the protection of nitrogen, keeping the temperature at a heating rate of 10 ℃/min, cooling, taking out and grinding, then soaking in hydrochloric acid for 20h at a soaking ratio of 2:1, washing with boiled distilled water to be neutral, and drying to obtain the product;
(7) And (3) water quality detection: and (3) performing water quality detection on the treatment liquid six obtained in the step (6), and discharging after reaching the standard.
Example 2: the advanced treatment process of the waste emulsion is different from the embodiment 1 in that: the treatment agent in the step (3) is prepared by adopting a preparation example 2; the flocculant in the step (6) consists of polyaluminum chloride, polyacrylamide and calcium chloride according to the mass ratio of 2:0.1:2.
Example 3: the advanced treatment process of the waste emulsion is different from that of the embodiment 2 in that: the treatment agent in the step (3) was prepared by using preparation example 3.
Example 4: the advanced treatment process of the waste emulsion is different from that of the embodiment 3 in that: the treatment agent in the step (3) was prepared by using preparation example 4.
Example 5: the advanced treatment process of the waste emulsion is different from that of the embodiment 4 in that: the treatment agent in the step (3) was prepared by using preparation example 5.
Example 6: the advanced treatment process of the waste emulsion is different from that of the embodiment 2 in that: in the step (6), the mass ratio of the flocculating agent to the adsorbent is 3:6.
Example 7: the advanced treatment process of the waste emulsion is different from that of the embodiment 2 in that: the adsorbent in the step (6) consists of activated carbon powder, chitosan microspheres and zeolite according to a mass ratio of 3:6:1.
Example 8: the advanced treatment process of the waste emulsion is different from that of the embodiment 2 in that: the adsorbent in the step (6) consists of activated carbon powder, chitosan microspheres and zeolite according to a mass ratio of 5:8:2.
Example 9: the advanced treatment process of the waste emulsion is different from that of the embodiment 8 in that: the chitosan microsphere in the adsorbent in the step (6) is a modified chitosan microsphere, and the preparation method of the modified chitosan microsphere comprises the following steps: s1, pretreatment of chitosan: dissolving chitosan in methanol, adding ferroferric oxide, carrageenan and glutaraldehyde, and mixing to obtain pretreated chitosan; s2, mixing the pretreated chitosan obtained in the step S1 with fly ash according to a mass ratio of 2:5 under microwaves, and obtaining the chitosan. Wherein the fly ash is treated by sulfuric acid; the mass ratio of the chitosan to the ferroferric oxide to the carrageenan to the glutaraldehyde is 3:1:1:1.
Example 10: the advanced treatment process of the waste emulsion is different from that of the embodiment 8 in that: the activated carbon powder in the adsorbent in the step (6) is pretreated, and the pretreatment method comprises the following steps: soaking activated carbon in phosphoric acid, oscillating, drying, performing heat treatment to obtain pretreated activated carbon, washing the pretreated activated carbon with water, filtering, and drying. Wherein the mass fraction of phosphoric acid is 40%. The temperature of both drying is 105 ℃. The heat treatment is to keep the temperature at 450 ℃ for 2 hours, and the heating rate is 15 ℃/min. The soaking time is 20min, and the soaking ratio is 3:1; the oscillation time is 10h.
Example 11: the advanced treatment process of the waste emulsion is different from that of the embodiment 2 in that: and (3) introducing air in the mixing process of the step (3).
Comparative examples
Comparative example 1: the advanced treatment process of the waste emulsion is different from that of the embodiment 7 in that: the adsorbent in the step (6) consists of activated carbon powder and chitosan microspheres according to the mass ratio of 1:1.
Comparative example 2: the advanced treatment process of the waste emulsion is different from that of the embodiment 3 in that: the auxiliary agent in the treatment agent in the step (3) is bentonite.
Comparative example 3: the advanced treatment process of the waste emulsion is different from that of the embodiment 3 in that: the auxiliary agent in the treatment agent in the step (3) consists of bentonite and cerium nitrate according to the mass ratio of 1:1.
Comparative example
Comparative example 1: the advanced treatment process of the waste emulsion is different from the embodiment 1 in that: the treatment agent in the step (3) was prepared by using preparation example 6.
Comparative example 2: the advanced treatment process of the waste emulsion is different from the embodiment 1 in that: the treatment agent in the step (3) was prepared by using preparation example 7.
Comparative example 3: the advanced treatment process of the waste emulsion is different from the embodiment 1 in that: and (3) deeply treating in the step (6): mixing the treatment liquid five obtained in the step (5) with a flocculating agent to obtain treatment liquid six.
Detection method
The water quality detection method comprises the following steps: taking the water quality of the waste emulsion subjected to the advanced treatment process of the examples 1-11, the comparative examples 1-3 and the comparative examples 1-3, detecting the content of COD, oil and suspended matters in the treated waste emulsion according to the detection method in GB/T8978-1996 comprehensive wastewater discharge Standard, and the detection results are shown in Table 1.
TABLE 1 effluent quality after advanced treatment of waste emulsions of examples 1-11, comparative examples 1-3
As can be seen from the data in table 1 in combination with the embodiment 1 and the comparative examples 1 to 3, the content of COD, oil and suspended matters in the water quality treated by the advanced treatment process of the waste emulsion in the embodiment 1 is low, and the treatment effect is better than that in the comparative examples 1 to 3.
As can be seen from the data in table 1 in combination with examples 1-2, the proportions of the components of the treatment agent are adjusted to match each other, which helps to improve the treatment effect on the waste emulsion.
As can be seen from the data in table 1 in combination with examples 2 to 4 and comparative examples 2 to 3, the quality of the water treated in examples 3 to 4 is better than that of the water treated in examples 2 and comparative examples 2 to 3, and the inventors of the present application consider that the treatment effect of the treatment agent on COD, oil and suspended matters in the waste emulsion is improved by adding an auxiliary agent in the treatment agent in examples 3 to 4, wherein the auxiliary agent is compounded from three components of cerium nitrate, bentonite and potassium carbonate, and the three components are mutually matched with other raw materials in the treatment agent.
By combining examples 4-5 and combining the data in Table 1, it can be seen that the treatment effect of example 5 on the waste emulsion is better than that of example 4, and that example 5 modifies bentonite in the auxiliary agent, thereby improving the adsorption performance of bentonite, facilitating the interaction with other raw materials in the treatment agent, and further improving the treatment effect on the waste emulsion.
As can be seen from the data in table 1 in combination with examples 2 and 6, the treatment effect of the waste emulsion in example 6 is better than that of the waste emulsion in example 2, and the mass ratio of the flocculant to the adsorbent in example 6 is adjusted so that the amount of the adsorbent added is higher than that of the flocculant, thereby the treated waste emulsion is better in treatment effect.
As can be seen from the data in table 1 in combination with examples 6 to 8 and comparative example 1, the treatment effect of the waste emulsion in examples 7 to 8 is better than that of the waste emulsion in example 6, and in examples 7 to 8, the adsorbent is obtained by compounding three components, namely activated carbon powder, chitosan microspheres and zeolite, and the three components are mutually matched to act together with the flocculant, so that the treatment effect of the waste emulsion is further improved.
As can be seen from the data in table 1 in combination with examples 8 to 9, the treatment effect of the waste emulsion in example 9 is better, and the treatment of the chitosan microsphere in the adsorbent in example 9 improves the flocculation and adsorption effects of the chitosan microsphere, and helps to further improve the treatment effect of the waste emulsion.
As can be seen from the data in table 1 in combination with examples 8 and 10, the treatment effect of the waste emulsion in example 10 is better than that of the waste emulsion in example 8, and the activated carbon powder is modified in example 10, so that the produced activated carbon powder has better effect in the treatment process of the waste emulsion.
By combining example 2 and example 11 and combining the data in table 1, it can be seen that in example 11, by introducing air during flocculation, the contact area of the treatment agent and the waste emulsion is increased, so that the cleaning of COD, oil and suspended matters during flocculation is further improved, and the treatment effect of the waste emulsion is improved.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (10)
1. A waste emulsion advanced treatment process is characterized in that: the method comprises the following steps:
(1) Pretreatment: separating oil from the waste emulsion, precipitating, filtering to obtain filtrate, and delivering the filtrate into an adjusting tank to obtain a first treatment liquid;
(2) Acidifying: acidifying and electrically flocculating the treatment fluid I in the step (1) to obtain treatment fluid II;
(3) Flocculation: adding a treatment agent into the treatment liquid II obtained in the step (2), mixing, dissolving, air-floating, then precipitating and filtering to obtain a treatment liquid III, wherein the treatment agent is mainly prepared from the following raw materials in parts by weight: 2-4 parts of liquid alkali, 7-9 parts of polyaluminium chloride, 0.1-0.5 part of polyacrylamide and 0.2-0.5 part of calcium chloride;
(4) Electro-oxidation: carrying out electrocatalytic oxidation on the treatment fluid III obtained in the step (3) to obtain a treatment fluid IV;
(5) Biological treatment: sequentially carrying out hydrolysis treatment, facultative treatment, anaerobic treatment, aerobic treatment and MBR membrane treatment on the treatment solution IV obtained in the step (4) to obtain a treatment solution V;
(6) Deep treatment: mixing the treatment liquid five obtained in the step (5) with a flocculating agent and an adsorbent to obtain treatment liquid six;
(7) And (3) water quality detection: and (3) performing water quality detection on the treatment liquid six obtained in the step (6), and discharging after reaching the standard.
2. The advanced treatment process for waste emulsion according to claim 1, wherein: and (3) introducing air in the mixing process of the step (3).
3. The advanced treatment process for waste emulsion according to claim 1, wherein: and (3) heating in the mixing process of the step (3), wherein the heating temperature is 40-45 ℃ and the heating time is 20-25min.
4. The advanced treatment process for waste emulsion according to claim 1, wherein: the mass ratio of the flocculating agent to the adsorbent in the step (6) is (2-3) (0.01-6).
5. The advanced treatment process for waste emulsion according to claim 4, wherein: the flocculant consists of (1-2) of polyaluminium chloride, (0.05-0.1) of polyacrylamide and (1-2) of calcium chloride in mass ratio.
6. The advanced treatment process for waste emulsion according to claim 4, wherein: the adsorbent consists of active carbon powder, chitosan microspheres and mordenite in the mass ratio of (3-5) (6-8) (1-2).
7. The advanced treatment process for waste emulsion according to claim 6, wherein: the chitosan microsphere is a modified chitosan microsphere, and the preparation method of the modified chitosan microsphere comprises the following steps: s1, pretreatment of chitosan: dissolving chitosan, adding ferroferric oxide, carrageenan and glutaraldehyde, and mixing to obtain pretreated chitosan; s2, mixing the pretreated chitosan obtained in the step S1 with fly ash under microwaves to obtain the chitosan.
8. The advanced treatment process for waste emulsion according to claim 6, wherein: the activated carbon powder is modified activated carbon, and the preparation method of the modified activated carbon comprises the following steps: soaking activated carbon in phosphoric acid, oscillating, drying, performing heat treatment to obtain pretreated activated carbon, washing the pretreated activated carbon with water, filtering, and drying.
9. The advanced treatment process for waste emulsion according to claim 1, wherein: the treatment agent in the step (3) also comprises 3-5 parts of auxiliary agent, wherein the auxiliary agent consists of cerium nitrate, bentonite and potassium carbonate according to the mass ratio of (3-5) (1-2).
10. The advanced treatment process for waste emulsion according to claim 9, wherein: the bentonite is modified bentonite, and the preparation method of the modified bentonite comprises the following steps: mixing bentonite, cetyl trimethyl ammonium bromide and water, stirring at constant temperature, carrying out suction filtration, washing, drying and grinding to obtain pretreated bentonite; activating and grinding the pretreated bentonite to obtain the bentonite.
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| CN102311204A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Treatment method for wastewater generated by processing high-acid crude oil |
| CN106587535A (en) * | 2016-12-30 | 2017-04-26 | 中冶赛迪工程技术股份有限公司 | Coking wastewater treatment process and system |
| CN108862847A (en) * | 2018-07-03 | 2018-11-23 | 北京清大国华环境股份有限公司 | A kind for the treatment of method and apparatus of industry phenol wastewater |
| WO2021101366A1 (en) * | 2019-11-20 | 2021-05-27 | Sime Darby Plantation Intellectual Property Sdn. Bhd. | Process for treating palm oil mill effluent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311204A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Treatment method for wastewater generated by processing high-acid crude oil |
| CN106587535A (en) * | 2016-12-30 | 2017-04-26 | 中冶赛迪工程技术股份有限公司 | Coking wastewater treatment process and system |
| CN108862847A (en) * | 2018-07-03 | 2018-11-23 | 北京清大国华环境股份有限公司 | A kind for the treatment of method and apparatus of industry phenol wastewater |
| WO2021101366A1 (en) * | 2019-11-20 | 2021-05-27 | Sime Darby Plantation Intellectual Property Sdn. Bhd. | Process for treating palm oil mill effluent |
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