CN101851039A - Modified starch production waste water treatment method - Google Patents
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- CN101851039A CN101851039A CN201010165130A CN201010165130A CN101851039A CN 101851039 A CN101851039 A CN 101851039A CN 201010165130 A CN201010165130 A CN 201010165130A CN 201010165130 A CN201010165130 A CN 201010165130A CN 101851039 A CN101851039 A CN 101851039A
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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, potato, 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, substantially 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, as 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 ambient water resource.At present on treatment technology, the way that there is no on the industry both at home and abroad.If the modified starch processing wastewater directly is discharged to bio anaerobic commonly used and the well foster producer processing of biology, will cause reactor 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, 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 produces in purified starch preparation technology is different from modified starch waste water, mainly is no chemical agent residue, can use bioreactor for treatment.The electrolysis point such as the pH value of waste water can 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) as 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 and in and sorbent material, degradeds such as dissolving sugar in the waste water, albumen, fiber, potato resin are accelerated, sludge settling is fast, very fast formation supernatant liquor, 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, adopt 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 by 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 ℃, operating pressure 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 quartz sand 1 ~ 2mm, big quartz sand 2 ~ 3mm, gravel 9 ~ 11mm; Control waste water filtering flow quantity be 0.5 ~ 80 ton/time, operating pressure 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 concentrated solution, wherein the ultra-filtration membrane molecular weight cut-off 10,000,10 ~ 45 ℃ of working temperatures, operating pressure 20 ~ 40psi; Six, the UF film that step 5 is obtained see through liquid be delivered to filter in the two-stage activated carbon filter filtered liquid, configuration consistency in the activated charcoal filter configuration step three; Control UF film see through flow quantity be 0.5 ~ 80 ton/time, operating pressure 0.15 ~ 0.5MPa; Seven, the filtered liquid that step 6 is obtained is delivered in second secondary filter and filters, and filtering accuracy is 5 μ m; Eight, the filtered liquid that will obtain after step 7 is handled is delivered to reverse osmosis membrane system and carries out closed cycle and concentrate 10 times and must see through liquid and concentrated solution; 10 ~ 45 ℃ of the working temperatures of reverse osmosis membrane, operating pressure 200 ~ 400psi; Nine, the concentrated solution that obtains of the concentrated solution 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 finish 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 allows a spot of starch and solid precipitation 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 liquid 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, by 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 liquid, improves the second secondary filter filtered liquid water quality, guarantees that postorder reverse osmosis (RO) film normally moves; Filter monose, salt behind the step 8 process RO membrane filtration, must see through liquid; The powder that step 9 obtains mostly is salinity, can make other product auxiliary materials (as building materials, products such as Snow Agent).
The present invention is before the ultra-filtration membrane that carries out step 5 (UF) system handles; carried out the carbon filtration treatment of step 3 one-level activated charcoal filter and step 4 secondary filter; be in order to protect the wound element in postorder ultra-filtration membrane (UF) system; prevent 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 be arranged 2 ~ 5 in parallel, to improve running efficiency of system.Reverse osmosis membrane in the step 8 (laminated film RO element) system also can be arranged in parallel 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 0.04psu, 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 every 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, product is qualified), 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, as 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 solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the present embodiment modified starch production waste water treatment method is realized by 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 ℃, operating pressure 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 quartz sand 1 ~ 2mm, big quartz sand 2 ~ 3mm, gravel 9 ~ 11mm; Control waste water filtering flow quantity be 0.5 ~ 80 ton/time, operating pressure 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 concentrated solution, wherein the ultra-filtration membrane molecular weight cut-off 10,000,10 ~ 45 ℃ of working temperatures, operating pressure 20 ~ 40psi; Six, the UF film that step 5 is obtained see through liquid be delivered to filter in the two-stage activated carbon filter filtered liquid, configuration consistency in the activated charcoal filter configuration step three; Control UF film see through flow quantity be 0.5 ~ 80 ton/time, operating pressure 0.05 ~ 0.5MPa; Seven, the filtered liquid that step 6 is obtained is delivered in second secondary filter and filters, and filtering accuracy is 5 μ m; Eight, the filtered liquid that will obtain after step 7 is handled is delivered to reverse osmosis membrane system and carries out closed cycle and concentrate 10 times and must see through liquid and concentrated solution; 10 ~ 45 ℃ of the working temperatures of reverse osmosis membrane, operating pressure 200 ~ 400psi; Nine, the concentrated solution that obtains of the concentrated solution 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 finish the processing of modified starch production waste water.
Adopt tap water that the waste water F1 in the storage pool is diluted in the present embodiment step 1, regulate pH value to 6 ~ 7 of waste water F1.
The liquid that sees through that the present 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, product is qualified), 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, as bio-reactor.
The modified starch production waste water treatment method technology of present embodiment is simple, cost is low, working cost is few, good waste water treatment effect.
Embodiment two: present embodiment and embodiment one are different is that modified starch production waste water is a kind of raw material or a plurality of raw materials blended chemically modified starch factory effluent in corn, paddy rice, potato, 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 the present embodiment, the factory effluent of the chemically modified starch of various raw materials mixed with the arbitrary volume ratio.
Embodiment three: that present 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: present 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 ℃, operating pressure 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 the present embodiment.Other equipment that can be used as strainer in the prior art all can be used for present embodiment.
Embodiment five: present 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 ℃, operating pressure are 0.1MPa.Other step and parameter are identical with embodiment one, two or three.
Embodiment six: present embodiment and embodiment one to five are different be in the step 3 control waste water filtering flow quantity be 10 ~ 60 tons/time, operating pressure 0.2 ~ 0.4MPa.Other step and parameter are identical with embodiment one to five.
Embodiment seven: present embodiment and embodiment one to five are different be in the step 3 control waste water filtering flow quantity be 20 ~ 40 tons/time, operating pressure 0.25 ~ 0.35MPa.Other step and parameter are identical with embodiment one to five.
Embodiment eight: present embodiment and embodiment one to five are different be in the step 3 control waste water filtering flow quantity be 30 tons/time, operating pressure 0.3MPa.Other step and parameter are identical with embodiment one to five.
Embodiment nine: that present embodiment and embodiment one to eight are different is 15 ~ 35 ℃ of working temperatures, operating pressure 25 ~ 35psi in the step 5.Other step and parameter are identical with embodiment one to eight.
Embodiment ten: that present embodiment and embodiment one to eight are different is 25 ℃ of working temperatures, operating pressure 30psi in the step 5.Other step and parameter are identical with embodiment one to eight.
Embodiment 11: present 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, operating pressure 0.2 ~ 0.4MPa.Other step and parameter are identical with embodiment one to ten.
Embodiment 12: present 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, operating pressure 0.25 ~ 0.35MPa.Other step and parameter are identical with embodiment one to ten.
Embodiment 13: present embodiment and embodiment one to ten are different be in the step 6 control UF film see through flow quantity be 30 tons/time, operating pressure 0.3MPa.Other step and parameter are identical with embodiment one to ten.
Embodiment 14: what present embodiment and embodiment one to 13 were different is working temperature 15-35 ℃, operating pressure 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: what present embodiment and embodiment one to 13 were different is 25 ℃ of working temperatures, the operating pressure 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: present embodiment realizes by following steps in conjunction with modified starch production waste water treatment method shown in Figure 1: 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, utilize pump 12 to be transported to the waste water F2 in the storage pool to filter in the strainer 3 waste water filtering liquid T1, the filtering accuracy of strainer 3 is that 2 ~ 8 μ m, working temperature are that 25 ℃, operating pressure are 0.1MPa; Three, with waste water filtering liquid T1 by pump 13 be transported to filter in the one-level activated charcoal filter 4 waste water filtering liquid T2, one-level activated charcoal filter 4 is configured to: gac 20 ~ 40 orders, little quartz sand 1 ~ 2mm, big quartz sand 2 ~ 3mm, gravel 9 ~ 11mm; Control waste water filtering liquid T1 flow be 0.5 ~ 80 ton/time, operating pressure is 0.2 ~ 0.4MPa; Four, with waste water filtering liquid T2 by pump 14 be delivered to filter in first secondary filter 5 waste water filtering liquid T3, filtering accuracy is 5 μ m; Five, with waste water filtering liquid T3 by 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 concentrated solution N1, wherein the ultra-filtration membrane molecular weight cut-off 10,000,10 ~ 45 ℃ of working temperatures, operating pressure 20 ~ 40psi(pound/square inch); Six, the UF film is seen through liquid T4 by pump 16 be delivered to filter in the two-stage activated carbon filter 7 filtered liquid 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, operating pressure 0.2 ~ 0.4MPa; Seven, with filtered liquid T5 by pump 17 be delivered to filter in second secondary filter 8 filtered liquid T6, filtering accuracy is 5 μ m; Eight, filtered liquid T6 being delivered to reverse osmosis membrane (laminated film RO element) system 9 by pump 18 carries out closed cycle and concentrates 10 times and must see through liquid T7(recycle-water) and concentrated solution N2; 25 ℃ of the working temperatures of reverse osmosis membrane system 9, operating pressure 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 finish the processing of modified starch production waste water.
Present 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 liquid T3 water quality, and the assurance ultrafiltration membrane system is normally moved.
Ultra-filtration membrane in the present embodiment in the step 5 (UF) system 6 be arranged 3 in parallel, 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 be arranged 3 in parallel, to improve the operational efficiency of system.
The production wastewater treatment method technology of the cassava acetate starch of present embodiment is simple, cost is low, working cost is few, good waste water treatment effect.
Present embodiment detects every 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 every index of tap water.
Table 1
By table 1 as seen, the water quality of the recycle-water of the factory effluent F1 of the cassava acetate starch of present 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, as bio-reactor.The recycle-water that present embodiment obtains can be made recirculated water and use, or is used for rinse water usefulness, can water saving.Recycle-water after the present embodiment utilization 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 product that the water source makes with pure water, and functional detected result indifference, product is qualified.
The powder that concentrated solution N1 in the present embodiment and N2 obtain after step 9 is handled mostly is salinity, can be used as the auxiliary material of other products, as building materials, Snow Agent etc.
Embodiment 17: what present embodiment and embodiment 16 were different is to adopt the potato 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 are identical with embodiment 16.
Potato oxidation in the present embodiment, acidolysis, crosslinked and four kinds of modified starches of octenyl mix with the equal-volume ratio; The cumulative volume of waste water F1 is 87L.
As a comparison, present 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.
Present embodiment to factory effluent F1, see through liquid T4, concentrated solution N1, see through liquid T7(recycle-water), every index of concentrated solution 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 every index of tap water.TDS is a total dissolved solid in the table 2.
Table 2
By table 2 as seen, the potato oxidation of present 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, utilize again or insert subordinate's Waste Water Treatment and handle, as bio-reactor.The recycle-water that present embodiment obtains can be made recirculated water and use, or is used for rinse water usefulness, can water saving.Recycle-water after the present embodiment utilization 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 product that the water source makes with pure water, and functional detected result indifference, product is qualified.
The powder that concentrated solution N1 in the present embodiment and N2 obtain after step 9 is handled mostly is salinity, can be used as the auxiliary material of other products, as building materials, Snow Agent etc.
By concrete present embodiment 17 as can be known, 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 at containing polymers such as organic thiazolinyl, ester group in the heavily contaminated factory effluent; strong oxidizer; objectionable impuritiess such as hypochlorite are to the grievous injury 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 by 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 ℃, operating pressure 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 quartz sand 1 ~ 2mm, big quartz sand 2 ~ 3mm, gravel 9 ~ 11mm; Control waste water filtering flow quantity be 0.5 ~ 80 ton/time, operating pressure 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 concentrated solution, wherein the ultra-filtration membrane molecular weight cut-off 10,000,10 ~ 45 ℃ of working temperatures, operating pressure 20 ~ 40psi; Six, the UF film that step 5 is obtained see through liquid be delivered to filter in the two-stage activated carbon filter filtered liquid, configuration consistency in the activated charcoal filter configuration step three; Control UF film see through flow quantity be 0.5 ~ 80 ton/time, operating pressure 0.1 ~ 0.5MPa; Seven, the filtered liquid that step 6 is obtained is delivered in second secondary filter and filters, and filtering accuracy is 5 μ m; Eight, the filtered liquid that will obtain after step 7 is handled is delivered to reverse osmosis membrane system and carries out closed cycle and concentrate 10 times and must see through liquid and concentrated solution; The working temperature 10-45 of reverse osmosis membrane ℃, operating pressure 200 ~ 400psi; Nine, the concentrated solution that obtains of the concentrated solution 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 finish 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 in the step 1 is a kind of raw material or the plurality of raw materials blended chemically modified starch factory effluent in corn, paddy rice, potato, sweet potato, cassava and the legume starch.
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 ℃, operating pressure 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, operating pressure 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, operating pressure 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, operating pressure 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, operating pressure 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 ℃, operating pressure 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 operating pressure 300psi of reverse osmosis membrane in the step 8.
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| CN102863096A (en) * | 2012-08-31 | 2013-01-09 | 保龄宝生物股份有限公司 | Method for recovering waste water generated in production of starch sugar |
| CN103159371A (en) * | 2011-12-09 | 2013-06-19 | 青岛科技大学 | Combined process for treating production wastewater of modified starch |
| 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 |
| CN107935237A (en) * | 2017-11-27 | 2018-04-20 | 晨光生物科技集团股份有限公司 | The method of comprehensive utilization of waste water 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN102863096A (en) * | 2012-08-31 | 2013-01-09 | 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 |
| CN107935237A (en) * | 2017-11-27 | 2018-04-20 | 晨光生物科技集团股份有限公司 | The method of comprehensive utilization of waste water in stevioside production |
| 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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| CN101851039B (en) | 2012-01-11 |
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