CN101851039B - Modified starch production waste water treatment method - Google Patents
Modified starch production waste water treatment method Download PDFInfo
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- CN101851039B CN101851039B CN2010101651302A CN201010165130A CN101851039B CN 101851039 B CN101851039 B CN 101851039B CN 2010101651302 A CN2010101651302 A CN 2010101651302A CN 201010165130 A CN201010165130 A CN 201010165130A CN 101851039 B CN101851039 B CN 101851039B
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention provides a modified starch production waste water treatment method, which relates to a starch production waste water treatment method. The invention solves the problems of environment pollution and water resource pollution caused by poor effect of the existing modified starch production waste water treatment method. The method of the invention comprises the following steps: regulating pH after waste water sedimentation; and then, sequentially passing through a coarse filter, a primary active carbon filter, a first fine filter, an ultrafiltration membrane system, a secondary active carbon filter, a second fine filter and a reverse osmosis membrane system to obtain recovered water. The method of the invention has the advantages of simple process, low cost, low operation cost and good waste water treatment effect. The recovered water obtained by the method of the invention has clear and transparent water quality, the pH valve is between 7.0 and 7.5, the average salt rejection reaches 99 percent, the electrical conductivity reaches 23 mus/com, the salinity reaches 0.04 psu, the total solid content reaches 15.2 mg/L, and each index of the recovered water is basically the same as each index of tap water. The invention reaches the national third-grade or second-grade discharge environment protection requirements, and can realize the effect of recycling reuse.
Description
Technical field
The present invention relates to a kind of starch production wastewater treatment process.
Background technology
The present both at home and abroad enterprise of starch industry production modified starch (wheat, yam, sweet potato, starch such as beans are raw material for available corn, paddy rice), one ton of modified starch of every production needs 4-10 ton water, basically all finally changes production technique waste water into.Because have a large amount of chemical reagent to use, making has a large amount of chemical residuals in the waste water, like sulfate radical; Phosphate radical, acetate, multiple organic acid; Heavy metal and multiple salts substances etc., as not handling direct discharging, very serious to the pollution and the destruction of Environmental Water resource.At present on treatment technology, the way that does not have on the industry both at home and abroad.If the modified starch spent process water directly is discharged to bio anaerobic commonly used and the well foster producer processing of biology, will cause reactor drum to be poisoned can't work.The enterprise of most of modified starches does not process waste water in order to save the spending of waste water project investment and treatment operating costs, and direct discharging of waste water in big settling bowl, is carried out the natural oxidation degraded.Though sewage treatment equipment has been installed by the starch enterprise that has; But after processing power can only be handled inadequately and add a large amount of fresh water dilution waste water; Handle a part of waste water; Most of waste water is discharged in oxidation pond or the rivers,lakes and seas, and this just causes the pollution of underground water and rivers water resources, and makes factory's ambient air be full of foul smell.
The waste water that in purified starch preparation technology, produces is different from modified starch waste water, mainly is no chemical agent residue, can use bioreactor for treatment.The electrolysis point such as can the pH value of waste water be transferred to, albumen precipitation is separated with whizzer again, suspension solids such as a spot of albumen, starch in the waste water are separated, light liquid is cooked the recirculated water utilization and is entered bioreactor for treatment.Method of wastewater treatment (application number: 200710049290.9 publication numbers: CN101066816A) like purified starch production; Potato-like starch processing waste water treatment agent and method of wastewater treatment (application number: 200810081135.x publication number: CN101239749A) use the flocking settling agent with in and sorbent material; Degradeds such as dissolving sugar in the waste water, albumen, fiber, potato resin are accelerated; Sludge settling is fast, forms supernatant very soon, clear stay turbid; Clear liquid discharging, turbid fluid dewatering drying is made fodder additives.For chemically modified starch production technique waste water, industry circle does not have good way at present both at home and abroad.Basically adopt a large amount of clear water dilution discharges to handle.This problem is a difficult problem in the industry.
Summary of the invention
The objective of the invention is in order to solve the treatment process weak effect of existing modified starch production waste water; The problem that causes environmental pollution, water resource pollution the invention provides a kind of modified starch production waste water treatment method, adopts the optimum combination membrane separation technique; Concentrate residual chemicals and remaining starch in the waste water; Separation and Recovery process water can reach the separating treatment waste liquid, and recycles the order ground of water.
A kind of modified starch production waste water treatment method of the present invention is realized through following steps: one, modified starch production waste water is discharged to settling bowl, sedimentation 20 ~ 28h is transported to the waste water after the sedimentation in the film processing system storage pool then, regulates pH value to 6 ~ 7; Two, the waste water in the storage pool is transported in the strainer filters, the filtering accuracy of strainer is that 0.25 ~ 15 μ m, working temperature are that 10 ~ 45 ℃, WP are 0.01 ~ 0.2MPa; Three, the waste water filtering liquid after step 2 is handled is transported in the one-level activated charcoal filter and filters, and activated charcoal filter is configured to: gac 20 ~ 40 orders, little silica sand 1 ~ 2mm, big silica sand 2 ~ 3mm, gravel 9 ~ 11mm; Control waste water filtering flow quantity be 0.5 ~ 80 ton/time, WP 0.1 ~ 0.5MPa; Four, will the waste water filtering liquid after step 3 is handled be delivered in first secondary filter and filter, filtering accuracy is 5 μ m; Five, will the waste water filtering liquid after step 4 is handled be delivered to ultrafiltration membrane system carry out the ultrafiltration closed cycle concentrate 10 ~ 15 times the UF film sees through liquid and liquid concentrator, wherein the ultra-filtration membrane molecular weight cut-off 10,000,10 ~ 45 ℃ of working temperatures, WP 20 ~ 40psi; Six, the UF film that step 5 is obtained is delivered to cross in the two-stage activated carbon filter through liquid and filters filtered liq, configuration consistency in the activated charcoal filter configuration step three; Control UF film see through flow quantity be 0.5 ~ 80 ton/time, WP 0.15 ~ 0.5MPa; Seven, the filtered liq that step 6 is obtained is delivered in second secondary filter and filters, and filtering accuracy is 5 μ m; The filtered liq that eight, will after step 7 is handled, obtain is delivered to reverse osmosis membrane system to carry out closed cycle and concentrates 10 times and must see through liquid and liquid concentrator; 10 ~ 45 ℃ of the working temperatures of reverse osmosis membrane, WP 200 ~ 400psi; Nine, the liquid concentrator that obtains of the liquid concentrator that obtains of step 5 and step 8 mix mixed concentrated liquid, then with mixed concentrated liquid through the double-effect evaporator evaporation, convection drying spray powder, promptly accomplish the processing of modified starch production waste water.
The liquid that sees through that step 8 of the present invention obtains is the recycle-water that obtains after the Metamorphic Amylum Production Wastewater Treatment.
Step 1 of the present invention lets a spot of starch and solid deposition in the waste water, and the recyclable starch of starch dope of post precipitation, or he uses; Step 2 can be removed suspended substance and the remaining larger particles in the waste water; Step 3 absorption and hold back impurity such as solid substance (being mainly residual starch) in the waste water, free chlorine, colloid, pigment is with protection postorder ultra-filtration membrane (UF) system; Step 4 is held back gac powder and the fine impurity in the waste water, improves the first secondary filter filtered liq water quality, and the assurance ultrafiltration membrane system is normally moved; The UF film has been held back albumen in the step 5, and pasted starch and macromolecular polysaccharide etc., UF film see through liquid and contain molecular weight less than 10,000 monose, salt etc.; Step 6 is through two-stage activated carbon filter absorption and hold back the UF film through impurity such as the COD in the liquid, free chlorine, colloids, through the filtration of activated charcoal filter, plays the effect of protection reverse osmosis membrane; Step 7 is held back gac powder and the tiny assorted son in the filtered liq, improves the second secondary filter filtered liq water quality, guarantees that postorder r-o-(RO) film normally moves; Filter monose, salt behind the step 8 process RO membrane filtration, must see through liquid; Mostly the powder that step 9 obtains is salinity, can make other product auxiliary materials (like building materials, products such as Snow Agent).
The present invention is before the ultra-filtration membrane that carries out step 5 (UF) system handles; Having carried out the carbon filtration treatment of step 3 one-level activated charcoal filter and step 4 secondary filter, is in order to protect the wound element in postorder ultra-filtration membrane (UF) system, prevents the polymer such as organic thiazolinyl, ester group in the heavily contaminated waste water; Strong oxidizer; Objectionable impuritiess such as hypochlorite improve the service efficiency and the life-span of wound element to the infringement of wound element, further reduce running cost.
Ultra-filtration membrane in the step 5 of the present invention (UF) system can laterally arrange 2 ~ 5, to improve running efficiency of system.Reverse osmosis membrane in the step 8 (laminated film RO element) system also can laterally arrange 2 ~ 5, to improve the operational efficiency of system.
Adopt the average ratio of desalinization of the recycle-water that modified starch production waste water treatment method of the present invention obtains (step 8 obtain see through liquid) to reach 99%; Water quality is as clear as crystal, and the pH value is 7.0 ~ 7.5, and specific conductivity reaches 23 μ s/cm; Salinity reaches 0.04 psu, and total solid content reaches 15.2mg/L.The COD of recycle-water is 12mg/L, BOD4mg/L, detects (standard is that COD is lower than 300mg/L, BOD is lower than 150mg/L) all up to standard, and it is suitable to see through liquid T7 each item index basic and tap water, and wherein some index is better than the tap water index.The recycle-water that the present invention obtains can be produced the recirculated water use of modified starch and (compare with the modified starch that pure water makes; The modified starch that utilizes recycle-water to make, both functional detection contrast indifferences, qualified products); Or be used for rinse water usefulness, can water saving.The water quality of recycle-water of the present invention can reach country three grades or secondary discharge-ring guaranteed request, can directly discharge, and utilizes again, perhaps inserts subordinate's Waste Water Treatment and handles, like bio-reactor.
Modified starch production waste water treatment method technology of the present invention is simple, cost is low, working cost is few, good waste water treatment effect.
Description of drawings
Fig. 1 is a Metamorphic Amylum Production Wastewater Treatment schema in the embodiment 16.
Embodiment
Technical scheme of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: this embodiment modified starch production waste water treatment method is realized through following steps: one, modified starch production waste water is discharged to settling bowl; Sedimentation 20 ~ 28h; Then the waste water after the sedimentation is transported in the film processing system storage pool, regulates pH value to 6 ~ 7; Two, the waste water in the storage pool is transported in the strainer filters, the filtering accuracy of strainer is that 0.25 ~ 15 μ m, working temperature are that 10 ~ 45 ℃, WP are 0.01 ~ 0.2MPa; Three, the waste water filtering liquid after step 2 is handled is transported in the one-level activated charcoal filter and filters, and activated charcoal filter is configured to: gac 20 ~ 40 orders, little silica sand 1 ~ 2mm, big silica sand 2 ~ 3mm, gravel 9 ~ 11mm; Control waste water filtering flow quantity be 0.5 ~ 80 ton/time, WP 0.1 ~ 0.5MPa; Four, will the waste water filtering liquid after step 3 is handled be delivered in first secondary filter and filter, filtering accuracy is 5 μ m; Five, will the waste water filtering liquid after step 4 is handled be delivered to ultrafiltration membrane system carry out the ultrafiltration closed cycle concentrate 10 ~ 15 times the UF film sees through liquid and liquid concentrator, wherein the ultra-filtration membrane molecular weight cut-off 10,000,10 ~ 45 ℃ of working temperatures, WP 20 ~ 40psi; Six, the UF film that step 5 is obtained is delivered to cross in the two-stage activated carbon filter through liquid and filters filtered liq, configuration consistency in the activated charcoal filter configuration step three; Control UF film see through flow quantity be 0.5 ~ 80 ton/time, WP 0.05 ~ 0.5MPa; Seven, the filtered liq that step 6 is obtained is delivered in second secondary filter and filters, and filtering accuracy is 5 μ m; The filtered liq that eight, will after step 7 is handled, obtain is delivered to reverse osmosis membrane system to carry out closed cycle and concentrates 10 times and must see through liquid and liquid concentrator; 10 ~ 45 ℃ of the working temperatures of reverse osmosis membrane, WP 200 ~ 400psi; Nine, the liquid concentrator that obtains of the liquid concentrator that obtains of step 5 and step 8 mix mixed concentrated liquid, then with mixed concentrated liquid through the double-effect evaporator evaporation, convection drying spray powder, promptly accomplish the processing of modified starch production waste water.
Adopt tap water that the waste water F1 in the storage pool is diluted in this embodiment step 1, regulate pH value to 6 ~ 7 of waste water F1.
The liquid that sees through that this embodiment step 8 obtains is the recycle-water that obtains after the Metamorphic Amylum Production Wastewater Treatment.The recycle-water that obtains can be made recirculated water and use (utilize its modified starch that makes than, the product that pure water makes, functional detection contrast indifference, qualified products), or is used for rinse water usefulness, can water saving.The water quality of recycle-water of the present invention can reach country three grades or secondary discharge-ring guaranteed request, can directly discharge, and utilizes again, perhaps inserts subordinate's Waste Water Treatment and handles, like bio-reactor.
The modified starch production waste water treatment method technology of this embodiment is simple, cost is low, working cost is few, good waste water treatment effect.
Embodiment two: what this embodiment and embodiment one were different is that modified starch production waste water is a kind of raw material or plurality of raw materials blended chemically modified starch factory effluent in corn, paddy rice, yam, sweet potato, cassava and the legume starch in the step 1.Other step and parameter are identical with embodiment one.
When modified starch production waste water was plurality of raw materials blended chemically modified starch factory effluent in this embodiment, the factory effluent of the chemically modified starch of various raw materials mixed with the arbitrary volume ratio.
Embodiment three: that this embodiment is different with embodiment one or two is sedimentation 24h in the step 1.Other step and parameter are identical with embodiment one or two.
Embodiment four: this embodiment and embodiment one, two or three are different is that the filtering accuracy of strainer in the step 2 is that 2 ~ 8 μ m, working temperature are that 15 ~ 30 ℃, WP are 0.08 ~ 0.15MPa.Other step and parameter are identical with embodiment one, two or three.
Strainer is cloth envelop collector or sand filter in this embodiment.Other equipment that can be used as strainer in the prior art all can be used for this embodiment.
Embodiment five: this embodiment and embodiment one, two or three are different is that the filtering accuracy of strainer in the step 2 is that 5 μ m, working temperature are that 25 ℃, WP are 0.1MPa.Other step and parameter are identical with embodiment one, two or three.
Embodiment six: this embodiment and embodiment one to five are different be in the step 3 control waste water filtering flow quantity be 10 ~ 60 tons/time, WP 0.2 ~ 0.4MPa.Other step and parameter are identical with embodiment one to five.
Embodiment seven: this embodiment and embodiment one to five are different be in the step 3 control waste water filtering flow quantity be 20 ~ 40 tons/time, WP 0.25 ~ 0.35MPa.Other step and parameter are identical with embodiment one to five.
Embodiment eight: this embodiment and embodiment one to five are different be in the step 3 control waste water filtering flow quantity be 30 tons/time, WP 0.3MPa.Other step and parameter are identical with embodiment one to five.
Embodiment nine: that this embodiment and embodiment one to eight are different is 15 ~ 35 ℃ of working temperatures, WP 25 ~ 35psi in the step 5.Other step and parameter are identical with embodiment one to eight.
Embodiment ten: that this embodiment and embodiment one to eight are different is 25 ℃ of working temperatures, WP 30psi in the step 5.Other step and parameter are identical with embodiment one to eight.
Embodiment 11: this embodiment and embodiment one to ten are different be in the step 6 control UF film see through flow quantity be 10 ~ 60 tons/time, WP 0.2 ~ 0.4MPa.Other step and parameter are identical with embodiment one to ten.
Embodiment 12: this embodiment and embodiment one to ten are different be in the step 6 control UF film see through flow quantity be 20 ~ 40 tons/time, WP 0.25 ~ 0.35MPa.Other step and parameter are identical with embodiment one to ten.
Embodiment 13: this embodiment and embodiment one to ten are different be in the step 6 control UF film see through flow quantity be 30 tons/time, WP 0.3MPa.Other step and parameter are identical with embodiment one to ten.
Embodiment 14: that this embodiment and embodiment one to 13 are different is working temperature 15-35 ℃, WP 250 ~ 350psi (pound/square inch) of reverse osmosis membrane in the step 8.Other step and parameter are identical with embodiment one to 13.
Embodiment 15: that this embodiment and embodiment one to 13 are different is 25 ℃ of working temperatures, the WP 300psi (pound/square inch) of reverse osmosis membrane in the step 8.Other step and parameter are identical with embodiment one to 13.
Embodiment 16: this embodiment combines modified starch production waste water treatment method shown in Figure 1 to realize through following steps: one, cassava acetate starch factory effluent F1 is discharged in the settling bowl 1; Sedimentation 24h; Then the waste water F2 after the sedimentation is transported in the film processing system storage pool 2; Adopt tap water that the waste water F1 in the storage pool is diluted, regulate pH value to 6 ~ 7; Two, the waste water F2 in the storage pool is utilized pump 12 to be transported in the strainer 3 to cross filter waste water filtering liquid T1, the filtering accuracy of strainer 3 is that 2 ~ 8 μ m, working temperature are that 25 ℃, WP are 0.1MPa; Three, waste water filtering liquid T1 is transported in the one-level activated charcoal filter 4 to cross through pump 13 filters waste water filtering liquid T2, one-level activated charcoal filter 4 is configured to: gac 20 ~ 40 orders, little silica sand 1 ~ 2mm, big silica sand 2 ~ 3mm, gravel 9 ~ 11mm; Control waste water filtering liquid T1 flow be 0.5 ~ 80 ton/time, WP is 0.2 ~ 0.4MPa; Four, waste water filtering liquid T2 is delivered in first secondary filter 5 to cross through pump 14 filters waste water filtering liquid T3, filtering accuracy is 5 μ m; Five, with waste water filtering liquid T3 through pump 15 be delivered to ultra-filtration membrane (UF) system 6 carry out the ultrafiltration closed cycle concentrate 10 ~ 15 times the UF film sees through liquid T4 and liquid concentrator N1; Wherein the ultra-filtration membrane molecular weight cut-off 10,000,10 ~ 45 ℃ of working temperatures, WP 20 ~ 40psi (pound/square inch); Six, the UF film being seen through liquid T4 is delivered to cross in the two-stage activated carbon filter 7 through pump 16 and filters filtered liq T5, one-level activated charcoal filter 4 configuration consistencies in the configuration of two-stage activated carbon filter 7 and the step 3; Control UF film see through liquid T4 flow be 0.5 ~ 80 ton/time, WP 0.2 ~ 0.4MPa; Seven, filtered liq T5 is delivered in second secondary filter 8 to cross through pump 17 filters filtered liq T6, filtering accuracy is 5 μ m; Eight, filtered liq T6 being delivered to reverse osmosis membrane (laminated film RO element) system 9 through pump 18 carries out closed cycle and concentrates 10 times and must see through liquid T7 (recycle-water) and liquid concentrator N2; 25 ℃ of the working temperatures of reverse osmosis membrane system 9, WP 300psi (pound/square inch); Nine, the N2 that obtains of the N1 that obtains of step 5 and step 8 mix N, then with N through double-effect evaporator 10 evaporations, utilize again moisture eliminator 11 convection dryings spray powder, promptly accomplish the processing of modified starch production waste water.
This embodiment step 3 absorption and hold back impurity such as solid substance (being mainly residual starch) among the waste water filtering liquid T1, free chlorine, colloid, pigment is with protection postorder ultra-filtration membrane (UF) system 6; Step 4 is held back gac powder and the fine impurity among the waste water filtering liquid T2, improves the first secondary filter filtered liq T3 water quality, and the assurance ultrafiltration membrane system is normally moved.
Ultra-filtration membrane in this embodiment in the step 5 (UF) system 6 laterally arranges 3, improves running efficiency of system; The liquid T4 that sees through of each ultra-filtration membrane (UF) system 6 is at first concentrated on centralized pool 19, and then input subordinate treatment system two-stage activated carbon filter 7.Reverse osmosis membrane in the step 8 (laminated film RO element) system 9 also laterally arranges 3, to improve the operational efficiency of system.
The production wastewater treatment method technology of the cassava acetate starch of this embodiment is simple, cost is low, working cost is few, good waste water treatment effect.
This embodiment detects each item index of factory effluent F1, recycle-water and the tap water of cassava acetate starch, and detected result is as shown in table 1.
Table 1 is the factory effluent F1 and the recycle-water of cassava acetate starch in the embodiment 16, and the detected result of each item index of tap water.
Table 1
Visible by table 1, the water quality of the recycle-water of the factory effluent F1 of the cassava acetate starch of this embodiment can reach country three grades or secondary discharge-ring guaranteed request, can directly discharge, and utilizes again, perhaps inserts subordinate's Waste Water Treatment and handles, like bio-reactor.The recycle-water that this embodiment obtains can be made recirculated water and use, or is used for rinse water usefulness, can water saving.Recycle-water after the utilization of this embodiment is handled carries out the preparation of modified starch as the water source, the quality of the starch that obtains and very nearly the same as the starch prods that the water source makes with pure water, functional detected result indifference, qualified products.
Mostly the powder that liquid concentrator N1 in this embodiment and N2 obtain after step 9 is handled is salinity, can be used as the auxiliary material of other products, like building materials, Snow Agent etc.
Embodiment 17: what this embodiment and embodiment 16 were different is to adopt the yam oxidation in the step 1, acidolysis, and the mixing factory effluent of crosslinked and four kinds of modified starches of octenyl is as waste water F1; The one-level activated charcoal filter 4 of step 3 and first secondary filter 5 of step 4 are dispensed, carry out the processing of postorder in ultra-filtration membrane (UF) system 6 of the direct input step five of waste water filtering liquid T1 that will obtain through strainer 3 filtrations of step 2.Other step and parameter and embodiment ten six phases are together.
Yam oxidation in this embodiment, acidolysis, crosslinked and four kinds of modified starches of octenyl mix with the equal-volume ratio; The TV of waste water F1 is 87L.
As a comparison, this embodiment dispenses the carbon filtration treatment of the secondary filter of the one-level activated charcoal filter of step 3 and step 4, and the technical indicator of the recycle-water after the processing has still reached national secondary or three grades of discharge water indexs.
This embodiment to factory effluent F1, see through liquid T4, liquid concentrator N1, each item index of seeing through liquid T7 (recycle-water), liquid concentrator N2 and tap water detects, detected result is as shown in table 2.
Table 2 is factory effluent F1 and recycle-waters in the embodiment 17, and the detected result of each item index of tap water.TDS is a total dissolved solid in the table 2.
Table 2
Visible by table 2; The yam oxidation of this embodiment; Acidolysis; The water quality of the recycle-water of the mixing factory effluent F1 of crosslinked and four kinds of modified starches of octenyl can reach country three grades or secondary discharge-ring guaranteed request, can directly discharge, utilizes, or insert subordinate's Waste Water Treatment and handle, like bio-reactor.The recycle-water that this embodiment obtains can be made recirculated water and use, or is used for rinse water usefulness, can water saving.Recycle-water after the utilization of this embodiment is handled carries out the preparation of modified starch as the water source, the quality of the starch that obtains and very nearly the same as the starch prods that the water source makes with pure water, functional detected result indifference, qualified products.
Mostly the powder that liquid concentrator N1 in this embodiment and N2 obtain after step 9 is handled is salinity, can be used as the auxiliary material of other products, like building materials, Snow Agent etc.
Can know through concrete this embodiment 17; Under the situation that does not have the carbon filtration treatment; Only utilizing ultra-filtration membrane (UF) system 6 to carry out ultrafiltration and reverse osmosis membrane (laminated film RO element) system 9, to carry out the recycle-water that the closed cycle thickening filtration obtains up to standard equally, recyclablely utilizes again; Yet contain polymers such as organic thiazolinyl, ester group in the heavily contaminated factory effluent, strong oxidizer, objectionable impuritiess such as hypochlorite are to the heavy damage of wound element; In order to protect the wound element in postorder ultra-filtration membrane (UF) system; Improve the service efficiency and the life-span of wound element, further reduce running cost, embodiment 16 has adopted step 3 and step 4 to carry out the carbon filtration treatment before step 5; Purpose is protection ultra-filtration membrane (UF) system 6, reduces running cost.
Claims (10)
1. modified starch production waste water treatment method; It is characterized in that modified starch production waste water treatment method realizes through following steps: one, modified starch production waste water is discharged to settling bowl; Sedimentation 20～28h; Then the waste water after the sedimentation is transported in the film processing system storage pool, regulates pH value to 6～7; Two, the waste water in the storage pool is transported in the strainer filters, the filtering accuracy of strainer is that 0.25～15 μ m, working temperature are that 10～45 ℃, WP are 0.01～0.2MPa; Three, the waste water filtering liquid after step 2 is handled is transported in the one-level activated charcoal filter and filters, and activated charcoal filter is configured to: gac 20～40 orders, little silica sand 1～2mm, big silica sand 2～3mm, gravel 9～11mm; Control waste water filtering flow quantity be 0.5～80 ton/time, WP 0.1～0.5MPa; Four, will the waste water filtering liquid after step 3 is handled be delivered in first secondary filter and filter, filtering accuracy is 5 μ m; Five, will the waste water filtering liquid after step 4 is handled be delivered to ultrafiltration membrane system carry out the ultrafiltration closed cycle concentrate 10～15 times the UF film sees through liquid and liquid concentrator, wherein the ultra-filtration membrane molecular weight cut-off 10,000,10～45 ℃ of working temperatures, WP 20～40psi; Six, the UF film that step 5 is obtained is delivered to cross in the two-stage activated carbon filter through liquid and filters filtered liq, configuration consistency in activated charcoal filter configuration and the step 3; Control UF film see through flow quantity be 0.5～80 ton/time, WP 0.1～0.5MPa; Seven, the filtered liq that step 6 is obtained is delivered in second secondary filter and filters, and filtering accuracy is 5 μ m; The filtered liq that eight, will after step 7 is handled, obtain is delivered to reverse osmosis membrane system to carry out closed cycle and concentrates 10 times and must see through liquid and liquid concentrator; The working temperature 10-45 of reverse osmosis membrane ℃, WP 200～400psi; Nine, the liquid concentrator that obtains of the liquid concentrator that obtains of step 5 and step 8 mix mixed concentrated liquid, then with mixed concentrated liquid through the double-effect evaporator evaporation, convection drying spray powder, promptly accomplish the processing of modified starch production waste water.
2. a kind of modified starch production waste water treatment method according to claim 1 is characterized in that modified starch production waste water is a kind of raw material or plurality of raw materials blended chemically modified starch factory effluent in corn, paddy rice, yam, sweet potato, cassava and the legume starch in the step 1.
3. a kind of modified starch production waste water treatment method according to claim 1 and 2 is characterized in that sedimentation 24h in the step 1.
4. a kind of modified starch production waste water treatment method according to claim 3, the filtering accuracy that it is characterized in that strainer in the step 2 are that 2～8 μ m, working temperature are that 15～30 ℃, WP are 0.08～0.15MPa.
5. according to claim 1,2 or 4 described a kind of modified starch production waste water treatment methods, it is characterized in that in the step 3 control waste water filtering flow quantity be 10～60 tons/time, WP 0.2～0.4MPa.
6. a kind of modified starch production waste water treatment method according to claim 5 is characterized in that 15～45 ℃ of working temperatures, WP 25～35psi in the step 5.
7. a kind of modified starch production waste water treatment method according to claim 5 is characterized in that 25 ℃ of working temperatures, WP 30psi in the step 5.
8. according to claim 1,2,4,6 or 7 described a kind of modified starch production waste water treatment methods, it is characterized in that in the step 6 control UF film see through flow quantity be 10～60 tons/time, WP 0.2～0.4MPa.
9. a kind of modified starch production waste water treatment method according to claim 8 is characterized in that working temperature 15-35 ℃, WP 250～350psi of reverse osmosis membrane in the step 8.
10. a kind of modified starch production waste water treatment method according to claim 8 is characterized in that 25 ℃ of working temperatures, the WP 300psi of reverse osmosis membrane in the step 8.
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| CN103159371A (en) * | 2011-12-09 | 2013-06-19 | 青岛科技大学 | Combined process for treating production wastewater of modified starch |
| CN102863096B (en) * | 2012-08-31 | 2014-01-15 | 保龄宝生物股份有限公司 | Method for recovering waste water generated in production of starch sugar |
| CN103466891A (en) * | 2013-09-18 | 2013-12-25 | 鲁洲生物科技（四川）有限公司 | Treatment process for corn processing wastewater |
| CN107935237B (en) * | 2017-11-27 | 2021-03-30 | 晨光生物科技集团股份有限公司 | Comprehensive utilization method of wastewater in stevioside production |
| CN111018224A (en) * | 2019-12-27 | 2020-04-17 | 合肥恒力装备有限公司 | Zero discharge process for waste water containing high-concentration PVP |
| CN111233261A (en) * | 2020-01-20 | 2020-06-05 | 轻工业环境保护研究所 | Treatment technology of potato starch production wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2506626Y (en) * | 2001-05-25 | 2002-08-21 | 天津市寰昊科技有限公司 | Moveable sewage treatment apparatus |
| CN2773052Y (en) * | 2005-03-08 | 2006-04-19 | 齐向春 | Assembled device with normal water and purified water |
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| JP3969221B2 (en) * | 2002-07-05 | 2007-09-05 | 栗田工業株式会社 | Method and apparatus for producing deionized water |
| JPWO2006057249A1 (en) * | 2004-11-24 | 2008-06-05 | 日立造船株式会社 | Reverse osmosis membrane seawater desalination system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2506626Y (en) * | 2001-05-25 | 2002-08-21 | 天津市寰昊科技有限公司 | Moveable sewage treatment apparatus |
| CN2773052Y (en) * | 2005-03-08 | 2006-04-19 | 齐向春 | Assembled device with normal water and purified water |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2004-33976A 2004.02.05 |
| 赵经纬."集成膜分离技术在精细化工产品废水处理中的应用".《节能减排》.2008,第16卷(第11期),第18-19页. |
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