CN104098201A - Treatment method for starch wastewater - Google Patents
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Abstract
The invention discloses a treatment method for starch wastewater. The method comprises the steps of: (1) pretreatment: treating starch wastewater by a grid; (2) pulping: adding a suspension liquid A having a volume 0.0005-0.01 time that of the wastewater into wastewater treated in step (1), mixing the mixture evenly, adjusting pH to 6-8, then adding a suspension liquid B having a volume 0.002-0.006 time that of the mixture, and mixing the materials evenly; (3) flocculation: adding a suspension liquid C having a volume 0.005-0.04 time that of the wastewater into the wastewater treated in step (2), stirring the mixture evenly and conducting standing for 0.5-1.0h; and (4) filtration: subjecting the wastewater treated in step (3) to sedimentation, filtering the supernatant and precipitate respectively, and combining the filtrate. With simple technological steps, the treatment method for starch wastewater provided by the invention can effectively remove organic matters from the wastewater, can achieve low metal ion residue, and is environment friendly, thus having good application prospects.
Description
Technical field
The present invention relates to a kind of starch wastewater treatment process.
Background technology
Starch is a kind of very important industrial raw material, has application very widely in fields such as food, medicine, chemical industry, papermaking.Wet-grinding technology and relative device is current main starch preparation technology, and the wastewater flow rate that this technique produces is very large, and according to statistics, 1 ton of starch of every production will produce 8-20 ton waste water, waste water mainly come from W-Gum complete processing immersion, the operation such as grind, dewater and be dried.Starch wastewater is a kind of organic waste water of high density, and main component is protein, starch and fiber substance, also contains some amino acid and inorganic salt, and its COD value is high, must could discharge after treatment.At present starch factory mainly adopts anaerobic and aerobic system to process waste water to reach emission standard, but this method not only system loading is high, cost is high, but also cannot reclaim the organic matters such as albumen in waste water, cause the wasting of resources.
Application number: 200710164578.0, denomination of invention: the Patent Application Publication of " a kind of starch wastewater that utilizes is produced the method for active albumen powder for feed " a kind of method of starch wastewater processing, it is to adopt natural subsidence and flocculating settling mode: collect starch production wastewater by its natural subsidence, isolate sedimentation solid substance; Weight percent by supernatant liquor in isolated supernatant liquor adds flocculation agent, specifically adding 3% concentration is 10% milk of lime, the polyacrylamide solution that the polymeric aluminum chlorides solution that 2% aluminium content is 5% and 1% concentration are 0.3%, remakes sedimentation after adding above-mentioned flocculation agent to stir evenly.The COD clearance of the method is lower, be only 80%-90%, adopt the mode of natural subsidence, settling time is greater than 24h, and consuming time long, efficiency is low, in solution after treatment, contain a large amount of aluminum ions and polyacrylamide, cause metal ion enrichment in water body organism or farm crop tissue, and transmit and amplify by food chain, environmental and human health impacts is caused damage; Application number: 201110195238.0, denomination of invention: the Patent Application Publication of " biochemical processing method of middle-size and small-size wastewater of starch factory " a kind of biochemical processing method of middle-size and small-size wastewater of starch factory, comprise the following steps: a, first in starch wastewater, add organic polymer coargulator polyacrylamide solution and the inorganic flocculating agent polymerize aluminum chloride aqueous solution, then be uniformly mixed, obtain mixed solution, in mixed solution, be formed with stable floc sedimentation; The add-on of described polyacrylamide solution accounts for 2～4% of starch wastewater gross weight, and the add-on of the polymerize aluminum chloride aqueous solution accounts for 1～2% of starch wastewater gross weight; B, the mixed solution that step a is mixed import air flotation pool and carry out dissolved air flotation, after dissolved air flotation, isolate the suspended substance floc sedimentation floating in mixed solution, obtaining water outlet is protein liquid, be that protein liquid adopts plate-and-frame filter press to carry out filter-press dehydration by separate the water outlet obtaining through air flotation pool, after dehydration, obtain starch albumen and filtered liquid, gained starch albumen is dried and makes protein fodder through pipe bundle drier; C, filtered liquid that will obtain after step b filter-press dehydration import in IC anaerobic reactor and carry out biochemical treatment, the filtered liquid that is about to obtain is entered the first reaction zone of reactor by the bottom of IC anaerobic reactor, the filtered liquid of importing is diluted in water inlet by reactor, make the organism in its filtered liquid fully react and be degraded, produce a large amount of biogas, the biogas part of generation is collected by the triphase separator of IC anaerobic reactor lower floor simultaneously; A part of biogas is carried mud in filtered liquid and filtered liquid secretly and is entered second reaction zone in addition, filtered liquid enters in the gas-liquid separator being provided with in second reaction zone under the effect of carrying secretly of biogas, by gas-liquid separation, biogas departs from filtered liquid and arranges collection outward, and residue filtered liquid and mud enter the bottom of the first reaction zone under action of gravity by return line; D, the filtered liquid that step c is entered after IC anaerobic reactor is processed to the first bottom, reaction zone and mud import in MBR membrane bioreactor and separate, the time stopping in MBR membrane bioreactor is 4～6h, and the content of controlling dissolved oxygen DO composition in sepn process is 2～4mg/L; The mud obtaining after MBR membrane bioreactor separates is dried re-using, and the lower clear liquid obtaining after separation is discharge or recycle directly.The method can effectively reduce the COD value of starch wastewater, but the processing step of the method is many, complicated operation, and flocculation agent can cause the secondary pollution of waste water, and By Bubble-floating Method sepn process energy consumption is larger, and cost is high, easily produces waste gas, contaminate environment.
Summary of the invention
The defect that has high, the consuming time length of cost, easily causes secondary pollution in order to overcome existing starch wastewater treatment process, the invention provides a kind of new starch wastewater treatment process.
A kind of starch wastewater treatment process, it comprises the steps:
(1) pre-treatment: get starch wastewater, the grid processing that is 2 ~ 10mm with gap;
(2) pulping: add the suspension liquid A of 0.0005 ~ 0.01 times of volume in step (1) waste water after treatment, mix, adjust pH to 6 ~ 8, then add the suspension liquid B of 0.002 ~ 0.006 times of volume, mix;
Described suspension liquid A is made up of algae powder and water, and algae powder concentration is 0.1 ~ 0.4g/ml; Described suspension liquid B is made up of dried yeast powder and water, and dried yeast powder concentration is 0.1 ~ 0.3g/ml;
(3) flocculation: get suspension liquid C and add in step (2) waste water after treatment, add the suspension liquid C of 0.005 ~ 0.04 times of volume, stir and leave standstill 0.5 ~ 1.0 hour;
Described suspension liquid C is made up of calcium chloride, corn cob and water, and calcium chloride concentration is 0.006 ~ 0.014g/ml, and corn cob concentration is 0.08 ~ 0.25g/ml;
(4) filter: get step (3) waste water after treatment, sedimentation, filters supernatant liquor and precipitation respectively, merging filtrate.
Preferably, the add-on of the described suspension liquid A of step (2) is wastewater volume 0.001 ~ 0.009 times, algae powder concentration is 0.14 ~ 0.3g/ml.Further preferably, the add-on of described suspension liquid A is wastewater volume 0.005 times, algae powder concentration is 0.14g/ml.
Preferably, the add-on of the described suspension liquid B of step (2) is wastewater volume 0.003 ~ 0.005 times, dried yeast powder concentration is 0.14 ~ 0.25g/ml.Further preferably, the add-on of described suspension liquid B is wastewater volume 0.005 times, dried yeast powder concentration is 0.14g/ml.
Preferably, in step (2), described algae powder is any one or two kinds in chlorella, sargassun, spirulina; Described dried yeast powder is cereuisiae fermentum.
Preferably, in step (2), described algae powder is feeding level algae powder; Described dried yeast powder is feeding level dried yeast powder.
Preferably, in step (3), the add-on of described suspension liquid C is wastewater volume 0.005 ~ 0.02 times, calcium chloride concentration is 0.008 ~ 0.012g/ml, corn cob concentration is 0.1 ~ 0.2g/ml.
Preferably, the add-on of described suspension liquid C is wastewater volume 0.02 times, calcium chloride concentration is 0.008g/ml, corn cob concentration is 0.1g/ml.
Preferably, the preparation method of the described suspension liquid C of step (3) is: according to proportioning described in claim 1, get calcium chloride and be added to the water, make calcium chloride solution, add again corn cob, mix, adjust pH to 1 ~ 3, be warming up to 90 ~ 100 DEG C, cooling after maintaining 0.5 ~ 1 hour.
COD clearance, the organic rate of recovery adsorption of metal ions rate of starch wastewater treatment process of the present invention are all very high, waste water organic matter after treatment, metal ion content are low, can recycle, the filter residue making can be used as feed and uses, and, the method consuming time short, cost is low, efficiency is high, does not have secondary pollution, and prospects for commercial application is good.
The embodiment of form by the following examples, is described in further detail foregoing of the present invention.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment.All technology realizing based on foregoing of the present invention all belong to scope of the present invention.
Brief description of the drawings
The process flow sheet of Fig. 1 the inventive method
Embodiment
explanation of nouns:
COD value: so-called chemical oxygen demand (COD), refers under certain conditions the oxidant content consuming while adopting certain strong oxidizer to process water sample.Chemical oxygen demand (COD) (COD) is to weigh the how many index of organic content in water, and chemical oxygen demand (COD) is larger, illustrates that water body is subject to organic pollution more serious.
index calculating method:
1, COD clearance
COD values determination method: the mensuration dichromate titration of GB/T11914-1989| water chemical oxygen demand.
COD clearance is (1-processed waste water COD value/initial COD value of waste water) × 100%.
2, organic rate of recovery method of calculation
Organic determination of recovery rates method:
In starch wastewater, organic content is high, and inorganic salt composition is less, thus adopt 60 degrees Celsius revolve steam will after waste water evaporate to dryness, weigh up dry biomass organic content in waste water;
Initial quality of organic matter is measured: getting the untreated starch wastewater of 100ml is m in quality
1250ml round-bottomed flask in, 60 DEG C of evaporates to dryness are placed in 90 DEG C ± 2 DEG C baking ovens and dry 24 hours, take out to put moisture eliminator and be weighed as M after cooling
1;
After processing, quality of organic matter is measured: getting the untreated starch wastewater of 100ml is m in quality
2250ml round-bottomed flask in, 60 DEG C of evaporates to dryness are placed in 90 DEG C ± 2 DEG C baking ovens and dry 24 hours, take out to put moisture eliminator and be weighed as M after cooling
2;
Organic rate of recovery calculation formula:
The rate of recovery
In formula: η---the organic rate of recovery;
M
1---initial organic and flask quality sum;
M
1---round-bottomed flask quality;
M
2---organic and flask quality sum after processing
M2---round-bottomed flask quality;
3, calcium ion adsorption rate measuring method
The mensuration EDTA volumetry of GB/T7476-1987 water quality calcium.
The adsorption rate of calcium ion is (1-calcium ion add-on/calcium ion residual quantity) × 100%.
material:
Feeding level chlorella powder: Putian City Divine Land biotechnology company limited
Feeding level sargassun powder: Yantai Bao Ju marine alga company limited
Feeding level spirulina powder: Binzhou Hao Yang agriculture and animal husbandry Science and Technology Ltd.
Feeding level yeast powder (cereuisiae fermentum): Cangzhou Wang Fa Bioisystech Co., Ltd
Embodiment 1 starch wastewater treatment process of the present invention
Waste water: after getting starch sewage water filtration, water quality analysis is carried out in sampling, and analytical results is COD:7241mg/L, BOD5 5412mg/L, NH4
+61.2mg/L, protein 2104mg/L, carbohydrate 5329mg/L, pH5.73.
1, treatment process
Process flow sheet as shown in Figure 1:
(1) getting starch wastewater, is the grid processing of 2mm through gap;
(2) starch wastewater 1000ml is stand-by in beaker afterwards to get filtration, the suspension liquid A being made up is added in the beaker that fills waste water fast to stirring and evenly mixing of 0.5g feeding level chlorella powder and 2ml water; In blending process, detect pH, final pH is stabilized in 5.81, and with the adjusting of 3mol/L sodium hydroxide solution, pH is stabilized in 6.22; Fast the suspension liquid B being made into by 0.4g feeding level dried yeast powder (cereuisiae fermentum) and 3ml water in advance is slowly added in the waste water that regulates pH, stir;
(3) taking 0.1g calcium chloride adds 10ml water to be mixed with the calcium chloride solution that mass volume ratio is 10g/L, 1.5g corn cob (60 order) is added in the calcium chloride solution preparing, with the salt acid for adjusting pH of 3-6mol/L be 1.32, after mixing, be warming up to 95 ± 5 DEG C, be suspension liquid C after cooling after maintaining 1 hour; The suspension liquid C preparing is added rapidly in beaker, after stirring, leave standstill after 1.0 hours and filter, collect filtrate and filter residue, filter residue is dried rear crushing packing.
2, result
Filtrate Analysis Results of Water Quality is: COD:422mg/L, NH4
+15.6mg/L, protein 103mg/L, carbohydrate 258mg/L, calcium ion concn is 2.89mg/L, pH6.47; COD clearance is 94.17%, and the organic rate of recovery is 95.14%, and calcium ion adsorption rate is 91.98%.
Embodiment 2 starch wastewater treatment process of the present invention
After getting starch sewage water filtration, water quality analysis is carried out in sampling, and analytical results is COD:9462mg/L, BOD5 7128mg/L, NH4
+75.8mg/L, protein 2953mg/L, carbohydrate 6541mg/L, pH5.59.
1, treatment process
Process flow sheet as shown in Figure 1:
(1) getting starch wastewater, is the grid processing of 5mm through gap;
(2) starch wastewater 1000ml is stand-by in beaker afterwards to get filtration, will be added fast in the beaker that fills waste water in advance stirring and evenly mixing by the suspension liquid A making in 0.8g feeding level sargassun powder and 8ml water; In blending process, detect pH, final pH is stabilized in 5.67, with the adjusting of 3mol/L sodium hydroxide solution, pH is stabilized in 6.89, fast the suspension liquid B being made into by 1.0g feeding level dried yeast powder (cereuisiae fermentum) and 4ml water in advance is slowly added in the waste water that regulates pH, stirs;
(3) taking 0.24g calcium chloride adds 20ml water to be mixed with the calcium chloride solution that mass volume ratio is 12g/L, 3g corn cob (60 order) is added in the calcium chloride solution preparing, with the salt acid for adjusting pH of 3-6mol/L be 2.25, after mixing, be warming up to 95 ± 5 DEG C, be suspension liquid C after cooling after maintaining 1 hour; The suspension liquid C preparing is added rapidly in beaker, after stirring, leave standstill after 0.5 hour and filter, collect filtrate and filter residue, filter residue is dried rear crushing packing.
2, result
Filtrate Analysis Results of Water Quality is: COD:589mg/L, NH4
+17.5mg/L, protein 132mg/L, carbohydrate 335mg/L, calcium ion concn is 2.89mg/L; COD clearance is 93.78%, and the organic rate of recovery is 95.08%, and calcium ion adsorption rate is 96.52%.
Embodiment 3 starch wastewater treatment process of the present invention
After getting starch sewage water filtration, water quality analysis is carried out in sampling, and analytical results is COD:6583mg/L, BOD5 4354mg/L, NH4
+58.4mg/L, protein 1932mg/L, carbohydrate 5089mg/L, pH6.01.
1, treatment process
Process flow sheet as shown in Figure 1:
(1) getting starch wastewater, is the grid processing of 8mm through gap;
(2) starch wastewater 1000ml is stand-by in beaker afterwards to get filtration, will be added fast in the beaker that fills waste water in advance stirring and evenly mixing by the suspension liquid A making in 0.3g spirulina powder and 1ml water; In blending process, detect pH, final pH is stabilized in 6.05, with the adjusting of 3mol/L sodium hydroxide solution, pH is stabilized in 7.86, fast the suspension liquid B being made into by 0.2g feeding level dried yeast powder (cereuisiae fermentum) and 2ml water in advance is slowly added in the waste water that regulates pH, stirs;
(3) taking 0.05g calcium chloride adds 5ml water to be mixed with the calcium chloride solution that mass volume ratio is 10g/L, 1g corn cob (60 order) is added in the calcium chloride solution preparing, with the salt acid for adjusting pH of 3-6mol/L be 2.78, after mixing, be warming up to 95 ± 5 DEG C, be suspension liquid C after cooling after maintaining 0.5 hour; The suspension liquid C preparing is added rapidly in beaker, after stirring, leave standstill after 0.5 hour and filter, collect filtrate and filter residue, filter residue is dried rear crushing packing.
2, result
Filtrate Analysis Results of Water Quality is: COD:394mg/L, NH4
+15.3mg/L, protein 85mg/L, carbohydrate 231mg/L, calcium ion concn is 1.06mg/L; COD clearance is 94.01%, and the organic rate of recovery is 95.49%, and calcium ion adsorption rate is 94.12%.
Embodiment 4 starch wastewater treatment process of the present invention
After getting starch sewage water filtration, water quality analysis is carried out in sampling, and analytical results is COD:8354mg/L, BOD5 6931mg/L, NH4
+68.9mg/L, protein 2677mg/L, carbohydrate 5883mg/L, pH5.64.
1, treatment process
Process flow sheet as shown in Figure 1:
(1) getting starch wastewater, is the grid processing of 5mm through gap;
(2) starch wastewater 1000ml is stand-by in beaker afterwards to get filtration, will be added fast in the beaker that fills waste water in advance stirring and evenly mixing by the suspension liquid A making in 0.7g feeding level sargassun powder and 5ml water; In blending process, detect pH, final pH is stabilized in 5.69, with the adjusting of 3mol/L sodium hydroxide solution, pH is stabilized in 7.25, fast the suspension liquid B being made into by 0.7g feeding level dried yeast powder (cereuisiae fermentum) and 5ml water in advance is slowly added in the waste water that regulates pH, stirs;
(3) taking 0.16g calcium chloride adds 20ml water to be mixed with the calcium chloride solution that mass volume ratio is 8g/L, 2g corn cob (60 order) is added in the calcium chloride solution preparing, with the salt acid for adjusting pH of 3-6mol/L be 1.86, after mixing, be warming up to 95 ± 5 DEG C, be suspension liquid C after cooling after maintaining 0.5 hour; The suspension liquid C preparing is added rapidly in beaker, after stirring, leave standstill after 1 hour and filter, collect filtrate and filter residue, filter residue is dried rear crushing packing.
2, result
Filtrate Analysis Results of Water Quality is: COD:498mg/L, NH4
+15.8mg/L, protein 118mg/L, carbohydrate 276mg/L, calcium ion concn is 2.92mg/L, pH6.47; COD clearance is 94.88%, and the organic rate of recovery is 95.40%, and calcium ion adsorption rate is 94.94%.
Contrast experiment's example
1, experiment material
(1) waste water: COD:7241mg/L, BOD5 5412mg/L, NH4
+61.2mg/L, protein 2104mg/L, carbohydrate 5329mg/L, pH5.73
(2) poly-ferric chloride: purchased from filtrate Industrial Co., Ltd of Gongyi City
Polyacrylamide: Henan Shen Tai Environmental Protection Technology Co., Ltd molecular weight 8,000,000
2, experimental technique
Adopt the conventional treatment process of starch wastewater, coagulating sedimentation experiment:
After filtration, get 1000ml waste water in beaker, regulating pH is 4.98,10mg poly-ferric chloride and 0.2mg polyacrylamide are dissolved in 10ml water, under lasting stirring, slowly add in the waste water that regulates pH and stir after 10 minutes and leave standstill after 1 hour and filter, get filtrate and carry out water quality analysis.
3, experimental result:
Filtrate Analysis Results of Water Quality is: COD:1074mg/L, NH4
+40.21mg/L, protein 158mg/L, carbohydrate 714mg/L, pH4.82; COD clearance is 85.17%, and the organic rate of recovery is 86.08%.In addition, this method is processed in rear solution and is contained a large amount of iron ions and polyacrylamide, and the comprehensive utilization difficulty of follow-up organic matter is large.
4, interpretation of result
The embodiment of the present invention 1 ~ 3 and the result of contrast experiment's example are compared as follows:
Table 1 comparison result
| ? | COD clearance | The organic rate of recovery |
| Embodiment 1 | 94.17% | 95.14% |
| Embodiment 2 | 93.78% | 95.08% |
| Embodiment 3 | 94.01% | 95.49% |
| Embodiment 4 | 94.88% | 95.40% |
| Comparative example | 85.17% | 86.08% |
As can be seen from Table 1, the COD clearance of the inventive method is higher by 8.61 ~ 9.71% than existing method, and the organic rate of recovery is high by 9 ~ 9.32%, not containing polyacrylamide, the more important thing is, owing to conventionally soluble metal ion not being processed especially in prior art, thereby serious on the impact of environment, and the inventive method waste water after treatment, metal ion content is very low, and environment is very friendly, is significantly better than the method for existing bibliographical information, wherein, the effect optimum of embodiment 4.
To sum up, starch wastewater treatment process COD clearance of the present invention, the organic rate of recovery, adsorption of metal ions rate are all higher, and cost is low, does not have secondary pollution, and environmental friendliness is significantly better than existing starch wastewater treatment process.
Claims (10)
1. a starch wastewater treatment process, is characterized in that: it comprises the steps:
(1) pre-treatment: get starch wastewater, the grid processing that is 2 ~ 10mm with gap;
(2) pulping: add the suspension liquid A of 0.0005 ~ 0.01 times of volume in step (1) waste water after treatment, mix, adjust pH to 6 ~ 8, then add the suspension liquid B of 0.002 ~ 0.006 times of volume, mix;
Described suspension liquid A is made up of algae powder and water, and algae powder concentration is 0.1 ~ 0.4g/ml; Described suspension liquid B is made up of dried yeast powder and water, and dried yeast powder concentration is 0.1 ~ 0.3g/ml;
(3) flocculation: get suspension liquid C and add in step (2) waste water after treatment, add the suspension liquid C of 0.005 ~ 0.04 times of volume, stir and leave standstill 0.5 ~ 1.0 hour;
Described suspension liquid C is made up of calcium chloride, corn cob and water, and calcium chloride concentration is 0.006 ~ 0.014g/ml, and corn cob concentration is 0.08 ~ 0.25g/ml;
(4) filter: get step (3) waste water after treatment, sedimentation, filters supernatant liquor and precipitation respectively, merging filtrate.
2. method according to claim 1, is characterized in that: the add-on of the described suspension liquid A of step (2) is wastewater volume 0.001 ~ 0.009 times, algae powder concentration is 0.14 ~ 0.3g/ml.
3. method according to claim 2, is characterized in that: the add-on of described suspension liquid A is wastewater volume 0.005 times, algae powder concentration is 0.14g/ml.
4. method according to claim 1, is characterized in that: the add-on of the described suspension liquid B of step (2) is wastewater volume 0.003 ~ 0.005 times, dried yeast powder concentration is 0.14 ~ 0.25g/ml.
5. method according to claim 4, is characterized in that: the add-on of described suspension liquid B is wastewater volume 0.005 times, dried yeast powder concentration is 0.14g/ml.
6. method according to claim 1, is characterized in that: in step (2), described algae powder is any one or two kinds in chlorella, sargassun, spirulina; Described dried yeast powder is cereuisiae fermentum.
7. method according to claim 1, is characterized in that: in step (2), described algae powder is feeding level algae powder; Described dried yeast powder is feeding level dried yeast powder.
8. method according to claim 1, is characterized in that: in step (3), the add-on of described suspension liquid C is wastewater volume 0.005 ~ 0.02 times, calcium chloride concentration is 0.008 ~ 0.012g/ml, corn cob concentration is 0.1 ~ 0.2g/ml.
9. method according to claim 1, is characterized in that: the add-on of described suspension liquid C is wastewater volume 0.02 times, calcium chloride concentration is 0.008g/ml, corn cob concentration is 0.1g/ml.
10. method according to claim 1, it is characterized in that: the preparation method of the described suspension liquid C of step (3) is: according to proportioning described in claim 1, getting calcium chloride is added to the water, make calcium chloride solution, add again corn cob, mix, adjust pH to 1 ~ 3, be warming up to 90 ~ 100 DEG C cooling after maintaining 0.5 ~ 1 hour.
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| CN108996786A (en) * | 2018-07-13 | 2018-12-14 | 盐城康鼎机械有限公司 | A kind of starch waste residue recycle device |
| CN109896656A (en) * | 2017-12-07 | 2019-06-18 | 贺州学院 | A method of processing horseshoe amylum wastewater |
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| CN105366783A (en) * | 2015-12-08 | 2016-03-02 | 甘肃省建材科研设计院 | Purification treatment method of potato starch wastewater |
| CN105502768A (en) * | 2015-12-08 | 2016-04-20 | 甘肃省建材科研设计院 | Innocent treatment method of potato starch wastewater |
| CN107473341A (en) * | 2017-09-15 | 2017-12-15 | 合肥学院 | Magnetic flocculation improves the experimental method of Sweet potato starch wastewater treatment effeciency |
| CN109896656A (en) * | 2017-12-07 | 2019-06-18 | 贺州学院 | A method of processing horseshoe amylum wastewater |
| CN109896656B (en) * | 2017-12-07 | 2021-10-26 | 贺州学院 | Method for treating water chestnut starch processing wastewater |
| CN108996786A (en) * | 2018-07-13 | 2018-12-14 | 盐城康鼎机械有限公司 | A kind of starch waste residue recycle device |
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