CN103159371A - Combined process for treating production wastewater of modified starch - Google Patents
Combined process for treating production wastewater of modified starch Download PDFInfo
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- CN103159371A CN103159371A CN2011104079358A CN201110407935A CN103159371A CN 103159371 A CN103159371 A CN 103159371A CN 2011104079358 A CN2011104079358 A CN 2011104079358A CN 201110407935 A CN201110407935 A CN 201110407935A CN 103159371 A CN103159371 A CN 103159371A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229920000881 Modified starch Polymers 0.000 title claims abstract description 39
- 239000004368 Modified starch Substances 0.000 title claims abstract description 39
- 235000019426 modified starch Nutrition 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- 230000003647 oxidation Effects 0.000 claims abstract description 10
- 230000003197 catalytic effect Effects 0.000 claims abstract description 4
- 229920002472 Starch Polymers 0.000 claims description 41
- 238000005189 flocculation Methods 0.000 claims description 33
- 230000016615 flocculation Effects 0.000 claims description 32
- 239000008107 starch Substances 0.000 claims description 28
- 235000019698 starch Nutrition 0.000 claims description 28
- 238000005868 electrolysis reaction Methods 0.000 claims description 22
- 239000006228 supernatant Substances 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000004065 wastewater treatment Methods 0.000 claims description 16
- 241000894006 Bacteria Species 0.000 claims description 15
- 238000006555 catalytic reaction Methods 0.000 claims description 14
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- 238000006731 degradation reaction Methods 0.000 claims description 6
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- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- 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 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
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- 235000009566 rice Nutrition 0.000 claims description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 2
- 229940100445 wheat starch Drugs 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 10
- 239000001301 oxygen Substances 0.000 abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 238000002203 pretreatment Methods 0.000 abstract description 4
- 238000000108 ultra-filtration Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000000593 degrading effect Effects 0.000 abstract 1
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- 238000010979 pH adjustment Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 239000007844 bleaching agent Substances 0.000 description 4
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
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- 235000009508 confectionery Nutrition 0.000 description 3
- 235000005822 corn Nutrition 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
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- 239000010865 sewage Substances 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
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- 244000215068 Acacia senegal Species 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
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- 229920000084 Gum arabic Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000237502 Ostreidae Species 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
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- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention belongs to the technical field of water treatment, and particularly relates to a combined process for treating the production wastewater of modified starch. The combined process comprises the following steps of: performing pre-treatment on the wastewater after pH adjustment of the modified starch; then further degrading organic substances in the wastewater of the modified starch after through a microelectrolysis device and a contact oxidation pond carried with EM (effective microorganisms); and then treating via an ultrafiltration membrane assembly, thus reducing CODCr (chemical oxygen demand Cr) in the wastewater generated by the modified starch, and enabling the wastewater to achieve discharge standards or recycling the wastewater. Via the process, catalytic microelectrolysis, aerobiotic biochemistry and ultrafiltration process are combined to treat the wastewater of the modified starch, so that the treatment effect is better than the treatment effect of the traditional treatment method; and moreover, the process is simple and practicable.
Description
Technical field
The invention belongs to water-treatment technology field, relate in particular to a kind of combination process for the treatment of modified starch waste water.
Background technology
The modified starch of making take starch as raw material, it is a branch maximum in starch deep processing series product, at present existing 2000 multiple products are widely used in the functional starting material of all trades and professions, and all trades and professions are reduced production costs, improve the quality of products and the aspects such as class, development product innovation play very important effect.Over past ten years, the output of world's modified starch increases rapidly, and the annual production of world's modified starch is near 7,000,000 tons at present.
One of purpose of modified starch is in order to adapt to the requirement of various industrial application, such as: high-temperature technology (sterilization of canned food) requires starch high temperature viscosity good stability; Frozen product requires starch freeze thawing good stability; Jelly foodstuff requires that the transparency is good, good film-forming property etc.Two of its purpose is in order to open up the new purposes of starch, the broadened application scope, such as: use starch in weaving; Hydroxyethylamyle, hydroxypropylated starch replace blood plasma; High cross-linking starch replaces surgical glove with talcum powder etc.
The market capacity of the modified starch of China is huge, nearly tens kinds of at present typical modified starch kinds, purposes is very extensive, for example: Sumstar 190 is mainly used in glue used in paper-making, coating adhesive, fluting board production tamanori, carton paper bag tamanori, produce candy for gum arabic, bleaching and dyeing the finishing sizing agent; Acidified starch mainly for the production of gelled confection, mile auxiliary agent of class candy, excipient, the applying glue of paper industry dumb light machine, after the washing of wrap dressing agent, cloth whole dose, plasterboard coheres etc.; Cross-linking starch is as soup stock can, oyster sauce sour milk thickening material, and bean vermicelli is produced auxiliary agent, and corrugated paper is produced tamanori, emgloves separant, linen and denim slurry; Cationic starch is coated with sizing agent as papermaking wet cloth sizing agent, toughener and retention aid, wrap dressing agent, and the sewage purification additive, adhesive tape is produced additive etc.
Although modified starch has very large market, processing and the qualified discharge of the waste water that also produces to modified starch are had higher requirement.Common starch generates the waste water that produces, can adopt efficient anaerobic and aerobic technology can satisfy processing requirements, and the waste water that modified starch produces belongs to high concentrated organic wastewater, have COD, BOD concentration is high, biodegradability is good characteristics, can not meet or exceed such waste water secondary discharge standard requirement by simple anaerobic and aerobic secondary biochemical treatment, its intractability is larger, the higher operation cost of enterprises that causes of cost for wastewater treatment increases, and causes the processing of such waste water to have certain limitation and be difficult to make it to process to qualified discharge.
During take corn as the raw material production ative starch, roughly have 60% corn can become commodity starch in the dry weight situation, also have 30% corn to become byproduct, rest part becomes waste liquid and discharges outside factory.Generally consisting of of corn starch wastewater: total reducing sugar 0.3%～0.7%, crude protein 2.1%, solid substance 5%～10%, robust fibre 2%～3%, lipid acid 0.1%～0.3%.Can find out from its composition, its biochemical consumption is processed such waste water and can not had much difficulties.And modified starch waste water is except containing above composition, contain a large amount of can not be biochemical and suppress biochemical material.
Sumstar 190 production conventional process: (1) modulation starch milk: with the starch milk that certain concentration is made in W-Gum city in retort, under agitation, use the sodium hydroxide solution adjust pH.Heating makes the newborn temperature of forming sediment at 21-38 ℃.(2) oxidation: at the appointed time, add chlorine bleach liquor's (containing available chlorine 5-10%).In reaction process, the pH value descends, and temperature rises, by adding in diluted sodium hydroxide solution and the acidic substance that produce stablize pH value, by the adjusting chlorine bleach liquor add speed and the cooling temperature of controlling, to prevent the starch granules expansion.Adjusting differential responses time, temperature pH value are added chlorine bleach liquor's speed and starch and chlorine bleach liquor's concentration, can produce product of different nature.(3) termination reaction: when oxidizing reaction reaches required degree, the pH value is dropped to certain numerical value, with the remaining clorox of sodium sulfite solution reduction, separate with whizzer after filtration, then remove the solubility byproduct through washing.(4) oven dry: product is dried at 50-52 ℃ of temperature.In this technique, produce certain inorganic salt in oxidation, reduction process, contain a large amount of organic matters and inorganic salt in waste water in water washing process, unreacted clorox and sodium bisulfite completely enters in waste water, oxidation products Sumstar 190 and reduzate chlorion all exist in waste water, and affect the biodegradability of sewage, brought difficulty for the processing of such waste water.
In order to solve the above problems, the invention provides a kind of combination process for the modified starch wastewater treatment, with catalysis and micro-electrolysis method pre-treatment modified starch waste water, have withstand load, cost is low and can improves the advantages such as wastewater biodegradability; Then by aerobic treatment technique on catalysis and micro-electrolysis pretreated basis, with the COD of waste water
CrReduce in 500mg/L; Utilize recently the waste water after hyperfiltration membrane assembly will be processed to reach emission standard.
Summary of the invention
The object of the invention is to, provide a kind of catalysis and micro-electrolysis-aerobic biochemical-ultrafiltration technology is combined that modified starch waste water is processed.Modified starch waste water after utilizing this technique with pH regulator carries out pre-treatment, then through micro-electrolysis device with after being loaded with the contact-oxidation pool of EM bacterium, organic substance in modified starch waste water is further degraded, then process by hyperfiltration membrane assembly, reduced the COD in the waste water that modified starch produces
Cr, make it reach emission standard or recycling.
The invention provides a kind of combination process for Metamorphic Amylum Production Wastewater Treatment, this technique comprises the steps:
Step 1 enters pretreatment pool with the former water of the waste water that produces in the modified starch process, carries out microelectrolysis processing, makes it to carry out flocculation sediment;
Step 2 enters nature anaerobically fermenting pond with supernatant effluent, drops into flocculation agent, and the suspended substance in supernatant effluent is precipitated out, and tentatively removes the COD of 20%-40% in waste water
Cr
Step 3, water outlet enter iron-carbon micro-electrolysis tower and carry out catalysis and micro-electrolysis, and add alkali that the pH value of waste water is adjusted to 9～10, form flocculation sediment;
Step 4 adds flocculation agent, makes the supernatant effluent COD after flocculation
CrReach 8300～9200mg/L;
Step 5 enters the supernatant liquor in step 4 the anaerobic reactor IC that anaerobic grain sludge is housed, and after the anaerobism of 24～30 hours, makes the water outlet water-quality COD
CrReach 1700～1900mg/L;
Step 6, water outlet enter the well foster reactor IC that load has the EM bacterium, make its organism carry out biological degradation, and in degradation process, holding temperature is at 25～35 ℃, and supporting the treatment time well is 15～36h, then enters hyperfiltration membrane assembly, makes its water outlet COD
CrBe 45～50mg/L.
Further, a kind of combination process for modified starch generation wastewater treatment of the present invention also has following technical characterictic:
Described modified starch is the one at least in wheat starch, W-Gum, yam starch, tapioca (flour), pueraria starch, sweet potato starch, sorghum starch, Starch rice, sago starch, waxy corn starch.
Before step 3, also need to add the high-valency metal that contains conductive impurity.
Described flocculation agent comprises the combination of a kind of in polyaluminium sulfate, polymerize aluminum chloride, bodied ferric sulfate, poly-ferric chloride, alum, polyacrylamide, cationic polyacrylamide, polyacrylic acid, sodium polyacrylate, calcium polyacrylate (CPA) or two kinds.
Described step 5 and step 6 can also be carried out in anaerobic jar or UASB.
In step 5, can also add efficient anaerobic bacterial classification or common sludge.
In step 6, the bio-contact oxidation stage of use EM bacterium also comprises domestication, immobilization and three steps of catalytic oxidation of EM bacterium.
Described hyperfiltration membrane assembly is plate and frame, tubular type, spiral wound or tubular fibre formula.
Described hyperfiltration membrane assembly adopts polysulfone membrane, Polysulfonamide, polyacrylonitrile film one at least.
The micropore size of described hyperfiltration membrane assembly is 0.05～1 micron.
Beneficial effect of the present invention: due to the complicated component in modified starch waste water, contain a large amount of organism, suspended substance, solvability and colloidality solid, the organic waste water that belongs to high salt high density uses traditional wastewater treatment mode often can not satisfy emission request.Therefore, utilize this technique to carry out pre-treatment to modified starch waste water, then by micro-electrolysis device with after being loaded with the contact-oxidation pool of EM bacterium, the organic substance in modified starch waste water is degraded, then process by hyperfiltration membrane assembly, reduced the COD in the waste water that modified starch produces
Cr, make it reach emission standard or recycling.This technique combines catalysis and micro-electrolysis-aerobic biochemical-ultrafiltration technology modified starch waste water is processed, and makes it more effective than traditional disposal methods, and simple.
Embodiment
The former water of the waste water that produces in the modified starch process is entered pretreatment pool, carry out microelectrolysis processing, make it to carry out flocculation sediment, suspended contaminant, the particulate matter removed in water have reduced the COD in waste water
Cr, prevent also that simultaneously the suspended substance in sealing stops up the iron carbon micropore of iron-carbon micro-electrolysis tower;
Supernatant effluent is entered nature anaerobically fermenting pond, drop into flocculation agent, the suspended substance in supernatant effluent is precipitated out, tentatively remove the COD of 20%-40% in waste water
Cr
Water outlet enters iron-carbon micro-electrolysis tower and carries out entering equalizing tank after catalysis and micro-electrolysis, add the filler that has than bigger serface, the high-valency metal that for example contains a large amount of conductive impurities, under this sour environment, make between metal and impurity and form microelectrode, produced the active hydrogen (hydroperoxyl radical) of capacity by the microelectrode electrolysis, and utilize its strong oxidizing property to decompose and reduce high-molecular-weight organic material, make larger molecular organics generation redox reaction in waste water and rupture, resolve into small-molecule substance.The Fe of a large amount of status nascendis that produce in iron carbon surface and reaction
2+And H
+Have high chemically reactive, can change many organic structure and characteristics in waste water, make the effects such as organism generation chain rupture, open loop, improve the biodegradability of waste water.Waste water through catalysis and micro-electrolysis is regulated pH, adds appropriate alkali with pH regulator to 9～10, with this understanding, can form Fe (OH)
2And Fe (OH)
3Flocculation sediment.
Add and be furnished with a certain proportion of PAC and PAM flocculation agent, the enhanced flocculation effect makes the supernatant effluent COD after flocculation
CrReach 8300～9200mg/L;
Above-mentioned supernatant liquor is entered the anaerobic reactor IC that anaerobic grain sludge is housed, after the anaerobism of 24～30 hours, make the water outlet water-quality COD
CrReach 1700～1900mg/L.In anaerobic process, can also add efficient anaerobic bacterial classification or common sludge, carry out anaerobism in anaerobic jar or UASB.
Water outlet enters the aerobic reactor IC that load has the EM bacterium, makes its organism carry out biological degradation, and the ability of processing modified starch through cultivating domestication EM composite bacteria is improved, and in degradation process, holding temperature is at 25～35 ℃, and the aerobic treatment time is 15～36h.In this step, the bio-contact oxidation stage of use EM bacterium comprises domestication, immobilization and the catalytic oxidation three phases of EM bacterium.Then, the waste water after degraded enters hyperfiltration membrane assembly, makes its water outlet COD
CrBe 45～50mg/L.The hyperfiltration membrane assembly that adopts is plate and frame, tubular type, spiral wound or tubular fibre formula, and its film that adopts is polysulfone membrane, Polysulfonamide or polyacrylonitrile film.The micropore size of hyperfiltration membrane assembly is 0.05～1 micron.
Embodiment 1
Get the former water 1000mL of modified starch waste water, record its COD
Cr21360mg/L, chlorine ion concentration 12318mg/L.Tentatively reduce COD except reaching than the suspended contaminant in water, particulate matter after adding PAC (10mL, 5%) and PAM (5mL, 2 ‰) flocculation filtration
Cr, COD after precipitation process
CrReach 18650mg/L;
Supernatant liquor is regulated pH=3.42 after flocculation, and enter iron-carbon micro-electrolysis tower and carry out catalysis and micro-electrolysis, 20～35 ℃ of temperature, dissolved oxygen is controlled at 3～4mg/L, hydraulic detention time 35min.Waste water through catalysis and micro-electrolysis enters equalizing tank, regulates pH to 9～10, adds simultaneously PAC (5mL, 5%) flocculation agent, PAM (2mL, 2 ‰) coagulant aids enhanced flocculation effect.Supernatant effluent COD after flocculation
CrReach 8380mg/L;
Supernatant liquor enters the anaerobic reactor IC that anaerobic grain sludge is housed, and is better between temperature is controlled 30-45 ℃.Dissolved oxygen 0～0.3mg/L, pH are between 7～9, hydraulic detention time 48h.After anaerobism, effluent quality COD
CrReaching the 1750mg/L water outlet enters;
Water outlet enters the aerobic reactor of load EM bacterium, and better, dissolved oxygen 2～3mg/L, pH are controlled between 7～9 holding temperature between 25～35 ℃, and the best aerobic treatment time is 16h.Water outlet COD
CrBe 283mg/L;
Water outlet enters hyperfiltration membrane assembly, and water outlet records COD
CrBe 46mg/L.
Embodiment 2
Get the former water 1000mL of modified starch waste water, record its COD
Cr21360mg/L, chlorine ion concentration 12318mg/L.Tentatively reduce COD except reaching than the suspended contaminant in water, particulate matter after adding PAC (15mL, 5%) and PAM (6mL, 2 ‰) flocculation filtration
Cr, COD after precipitation process
CrReach 18230mg/L;
Supernatant liquor is regulated pH=4.36 after flocculation, and enter iron-carbon micro-electrolysis tower and carry out catalysis and micro-electrolysis, 20～35 ℃ of temperature, dissolved oxygen is controlled at 3～4mg/L, hydraulic detention time 30min.
Waste water through catalysis and micro-electrolysis enters equalizing tank, regulates pH to 9～10, adds simultaneously PAC (5mL, 5%) flocculation agent, PAM (2mL, 2 ‰) coagulant aids enhanced flocculation effect.Supernatant effluent COD after flocculation
CrReach 8515mg/L;
Supernatant liquor enters the anaerobic reaction-pot that anaerobic grain sludge is housed, and is better between temperature is controlled 30-45 ℃.Dissolved oxygen 0～0.3mg/L, pH are between 7～9, hydraulic detention time 48h.After anaerobism, effluent quality COD
CrReaching the 2630mg/L water outlet enters; Water outlet enters the aerobic reactor of load EM bacterium, and holding temperature is better between 25～35 ℃, dissolved oxygen 2～3mg/L, and the pH value is controlled between 7～9, and the best aerobic treatment time is 36h.Water outlet COD
CrBe 368mg/L;
Water outlet enters hyperfiltration membrane assembly, and water outlet records COD
CrBe 47mg/L.
Embodiment 3
Get the former water 1000mL of modified starch waste water, record its COD
Cr21360mg/L, chlorine ion concentration 12318mg/L.Tentatively reduce COD except reaching than the suspended contaminant in water, particulate matter after adding PAC (10mL, 5%) and PAM (5mL, 2 ‰) flocculation filtration
Cr, COD after precipitation process
Cr18550mg/L;
Supernatant liquor is regulated pH=5.06 after flocculation, and enter iron-carbon micro-electrolysis tower and carry out catalysis and micro-electrolysis, 20～35 ℃ of temperature, dissolved oxygen is controlled at 3～4mg/L, hydraulic detention time 45min.Waste water through catalysis and micro-electrolysis enters equalizing tank, regulates pH to 9～10, adds simultaneously PAC (5mL, 5%) flocculation agent, PAM (2mL, 2 ‰) coagulant aids enhanced flocculation effect.Supernatant effluent COD after flocculation
CrReach 8260mg/L;
Supernatant liquor enters the anaerobic reactor IC that anaerobic grain sludge is housed, and is better between temperature is controlled 30-45 ℃.Dissolved oxygen 0～0.3mg/L, pH are between 7～9, hydraulic detention time 36h.After anaerobism, effluent quality COD
CrReaching the 2340mg/L water outlet enters;
Water outlet enters the aerobic reactor of load EM bacterium, and better, dissolved oxygen 2～3mg/L, pH are controlled between 7～9 holding temperature between 25～35 ℃, and the best aerobic treatment time is 24h.Water outlet COD
CrBe 305mg/L;
Water outlet enters hyperfiltration membrane assembly, and water outlet records COD
CrBe 45mg/L.
The above is only for the preferred embodiment of invention, and is within the spirit and principles in the present invention all not in order to limit the utility model, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. combination process that is used for Metamorphic Amylum Production Wastewater Treatment is characterized in that: this technique comprises the steps,
Step 1 enters pretreatment pool with the former water of the waste water that produces in the modified starch process, carries out microelectrolysis processing, makes it to carry out flocculation sediment;
Step 2 enters nature anaerobically fermenting pond with supernatant effluent, drops into flocculation agent, and the suspended substance in supernatant effluent is precipitated out, and tentatively removes the COD of 20%-40% in waste water
Cr
Step 3, water outlet enter iron-carbon micro-electrolysis tower and carry out catalysis and micro-electrolysis, and add alkali that the pH value of waste water is adjusted to 9～10, form flocculation sediment;
Step 4 adds flocculation agent, makes the supernatant effluent COD after flocculation
CrReach 8300～9200mg/L;
Step 5 enters the supernatant liquor in step 4 the anaerobic reactor IC that anaerobic grain sludge is housed, and after the anaerobism of 24～30 hours, makes the water outlet water-quality COD
CrReach 1700～1900mg/L;
Step 6, water outlet enter the well foster reactor IC that load has the EM bacterium, make its organism carry out biological degradation, and in degradation process, holding temperature is at 25～35 ℃, and supporting the treatment time well is 15～36h, then enters hyperfiltration membrane assembly, makes its water outlet COD
CrBe 45～50mg/L.
2. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1, it is characterized in that: described modified starch is the one at least in wheat starch, W-Gum, yam starch, tapioca (flour), pueraria starch, sweet potato starch, sorghum starch, Starch rice, sago starch, waxy corn starch.
3. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1, is characterized in that: before step 3, also need to add the high-valency metal that contains conductive impurity.
4. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1 is characterized in that: described flocculation agent comprises the combination of a kind of in polyaluminium sulfate, polymerize aluminum chloride, bodied ferric sulfate, poly-ferric chloride, alum, polyacrylamide, cationic polyacrylamide, polyacrylic acid, sodium polyacrylate, calcium polyacrylate (CPA) or two kinds.
5. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1, it is characterized in that: described step 5 and step 6 can also be carried out in anaerobic jar or UASB.
6. a kind of combination process that generates wastewater treatment for modified starch according to claim 1, is characterized in that: in step 5, can also add efficient anaerobic bacterial classification or common sludge.
7. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1 is characterized in that: in step 6, use bio-contact oxidation stage of EM bacterium also to comprise domestication, immobilization and three steps of catalytic oxidation of EM bacterium.
8. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1, it is characterized in that: described hyperfiltration membrane assembly is plate and frame, tubular type, spiral wound or tubular fibre formula.
9. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1 is characterized in that: described hyperfiltration membrane assembly adopts polysulfone membrane, Polysulfonamide, polyacrylonitrile film one at least.
10. a kind of combination process for Metamorphic Amylum Production Wastewater Treatment according to claim 1, it is characterized in that: the micropore size of described hyperfiltration membrane assembly is 0.05～1 micron.
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| CN114538695A (en) * | 2020-11-24 | 2022-05-27 | 山东福洋生物科技股份有限公司 | Method for treating modified starch industrial wastewater by using microorganisms |
| CN114538695B (en) * | 2020-11-24 | 2024-05-24 | 山东福洋生物科技股份有限公司 | Method for treating modified starch industrial wastewater by utilizing microorganisms |
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