CN101239760A - Pretreatment technique for industrial bean clear water - Google Patents
Pretreatment technique for industrial bean clear water Download PDFInfo
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- CN101239760A CN101239760A CNA2008100144750A CN200810014475A CN101239760A CN 101239760 A CN101239760 A CN 101239760A CN A2008100144750 A CNA2008100144750 A CN A2008100144750A CN 200810014475 A CN200810014475 A CN 200810014475A CN 101239760 A CN101239760 A CN 101239760A
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- clear water
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Abstract
The present invention is a preprocessing technique of the industrial bean clear water, belongs to the field of the industrial sewage and is characterized in that the technique comprises the following technical procedures: when the bean clear water is adjusted with pH value, respectively adding the polyaluminium chloride solution and the polyacrylamide solution; after stewing separating the precipitate, adjusting pH of the residual solution and adding the polyaluminium chloride solution and polyacrylamide solution. The technique of the invention has the advantages of effectively eliminating the SS, BOD, COD and the like in the bean clear water with eliminating ratio higher than 88%; simple technique and excellent operability; effectively increasing the biochemical property and facilitating the subsequent biochemical treating.
Description
Technical field
The invention belongs to the Industrial Wastewater Treatment field, be specifically related to the pretreatment technology that carries out before the industrial bean clear water biochemical treatment.
Background technology
In the production process of soybean isolate protein powder, soybean fibers powder, the sewage that produces is referred to as bean clear water, because bean clear water is that the soybean low temperature soy meal adds water, add the sewage that multiple catalyzer forms again after transferring pH value, contain foreign material and suspended substances (SS) such as bean dregs, Sodium Pyrosulfite, sodium-chlor, defoamer, hydrochloric acid, ammonium sulfate radical ion, the water quality complexity, and the content of COD is more than 20,000, even 30,000.If directly adopt biochemical process to handle, difficulty is big, handles not up to standard.General coagulation-air supporting the method that adopts is carried out pre-treatment to bean clear water in the prior art, but treatment effect is undesirable, the clearance of SS (suspended substance), BOD (chemical oxygen demand (COD)), COD (biochemical oxygen demand (BOD)) only is about 50%, still influence follow-up biochemical treatment operation, cause the subsequent disposal difficulty big, discharge not up to standard.
Summary of the invention
The object of the present invention is to provide the pretreatment technology of the industrial bean clear water of SS, BOD, COD content in a kind of effective removal bean clear water, improve industrial bean clear water biodegradability energy, guarantee the effect of follow-up biochemical treatment.
The present invention is achieved in that
The pretreatment technology of industrial bean clear water is characterized in that comprising following processing step:
(1) bean clear water transfers pH value to 6-8;
(2) by weight 1: 2000-10000 adds polymeric aluminum chlorides solution;
(3) after the stirring, again by weight 1: 10000-50000 adds polyacrylamide solution;
(4) after liquid leaves standstill, sediment separate out;
(5) the surplus liquid behind the sediment separate out repeats above-mentioned steps (1), (2), (3), (4), carries out secondary treatment.
After the present invention adopts such scheme, before to the industrial bean clear water flocculation, at first transfer pH value, can effectively reduce the flocculation agent consumption, improve flocculating effect.Compared with prior art have following technique effect:
1, can effectively remove SS, BOD in the bean clear water, COD etc., clearance reaches more than 89%;
2, can effectively improve the biodegradability energy of bean clear water, be beneficial to follow-up biochemical treatment;
3, whole technology is carried out under normal temperature, normal pressure, and equipment is not had particular requirement, and technology is simple, workable;
4, the flocculation agent consumption is few, has reduced production cost;
5, isolated throw out also can be made as feed or fertilizer, recycles, and improves the utilization ratio again of material.
The present invention also can be used for the pre-treatment of soya-bean milk water or other trade effluent.
Embodiment
Bean clear water is sent in settling tank or the setting tank, adds alkali and transfers pH value to 6-8, carries out mechanical stirring in the time of adjusting, makes its thorough mixing; By weight 1: 2000-10000, add polymeric aluminum chlorides solution, mechanical stirring makes its thorough mixing; The concentration of polymeric aluminum chlorides solution is 1%.Again by weight 1: 10000-50000 adds polyacrylamide solution, and mechanical stirring makes its thorough mixing; The concentration of polyacrylamide solution is 1 ‰.Aforesaid liquid left standstill 0.5-4 hour, made the throw out in the bean clear water finish coalescence, layering; Carry out solid-liquid separation by tripping device again, isolating throw out is collected the back and is recycled; Surplus liquid after the separation is sent in settling tank or the setting tank once more, carries out secondary treatment.Repeat above-mentioned steps during secondary treatment: transfer pH value to 6-8, add polymeric aluminum chlorides solution, polyacrylamide solution in same ratio, finish solid-liquid separation after leaving standstill, throw out is recycled as feed or fertilizer, separate the back and form supernatant liquor, finish pre-treatment of the present invention, supernatant liquor is used for follow-up biochemical treatment, thus qualified discharge.Supernatant liquor also can be used for process water.
The alkali that bean clear water adopts when transferring PH is a kind of or arbitrary combination in sodium hydroxide, calcium hydroxide, calcium oxide or other alkaline matter.
By the characteristic of flocculation agent as can be known, the bean clear water solution of different PH is very big to the influence of flocculating effect, and suitable pH value can reduce the flocculation agent consumption, improves flocculating effect.The present invention is used in combination inorganic macromolecule flocculant poly aluminum chloride with polyacrylamide, the two add respectively and with the bean clear water thorough mixing, make colloidal solid in the bean clear water and suspended particle under the bridging action and electrolytical effect of flocculation agent, in and the particle surface electric charge, repulsive force between reduction or the elimination particle, thereby gather together, volume increases, when the particle aggregation volume acquires a certain degree, just from bean clear water, separate forming flocs unit, after the secondary flocculation, form big cluster of grains, precipitation, separate, finish the pre-treatment of bean clear water, enter biochemical processing process afterwards.
Below in conjunction with embodiment the present invention is elaborated.
Water droplet experiment by polymeric aluminum chlorides solution shows: 1 milliliter of polymeric aluminum chlorides solution (concentration by 1% is made) mean value is 15.6, and promptly every polymeric aluminum chlorides solution is about 0.064 milliliter, and the weight of every this solution is 6.4 * 10
-6Kilogram.In like manner the content of polyacrylamide solution (concentration is 1 ‰) is every 8.7 * 10
-7Kilogram.
Embodiment 1
Get 500 milliliters of bean clear waters, pH value is 3.62 after measured, adds sodium hydroxide and transfers PH to 7.8; Add 3 of polymeric aluminum chlorides solutions when stirring, add 5 of polyacrylamide solutions again; Left standstill 1 hour, the bean clear water clarification is separated, the surplus liquid behind the sediment separate out carries out secondary treatment: transfer PH to 7.8 once more; Add 3 of polymeric aluminum chlorides solutions when stirring, add 5 of polyacrylamide solutions again; Left standstill 1 hour, and separated the back and form supernatant liquor and throw out.The entire treatment process is carried out under normal pressure, normal temperature (15 ℃) situation.
Embodiment 2
Get 500 milliliters of bean clear waters, pH value is 4.5 after measured, adds calcium hydroxide and transfers PH to 6.8; Add 3 of polymeric aluminum chlorides solutions when stirring, add 3 of polyacrylamide solutions again; Left standstill 2 hours, the bean clear water clarification is separated, the surplus liquid behind the sediment separate out carries out secondary treatment: transfer PH to 6.8 once more; Add 3 of polymeric aluminum chlorides solutions when stirring, add 3 of polyacrylamide solutions again; Left standstill 2 hours, and separated the back and form supernatant liquor and throw out.The entire treatment process is carried out under normal pressure, normal temperature (22 ℃) situation.
With the method for embodiment 1,2 pre-treatment bean clear waters, the method for handling bean clear water with coagulation-air supporting method compares mensuration, the results are shown in following table:
| COD content before handling | Handle back COD content | The COD clearance | |
| Embodiment 1 | 27613 | 3150 | 88.59％ |
| Embodiment 2 | 28311 | 2727 | 90.37％ |
| Coagulation-air supporting method | 27802 | 13901 | 50％ |
As seen from the above table: adopt the present invention to handle bean clear water, the average removal rate of COD can reach 89.48%, apparently higher than the bean clear water of coagulation-air supporting method processing.
Claims (5)
1, the pretreatment technology of industrial bean clear water is characterized in that comprising following processing step:
(1) bean clear water transfers pH value to 6-8;
(2) by weight 1: 2000-10000 adds polymeric aluminum chlorides solution;
(3) after the stirring, again by weight 1: 10000-50000 adds polyacrylamide solution;
(4) after liquid leaves standstill, sediment separate out;
(5) the surplus liquid behind the sediment separate out repeats above-mentioned steps (1), (2), (3), (4), carries out secondary treatment.
2, the pretreatment technology of industrial bean clear water according to claim 1 is characterized in that: adopt a kind of or arbitrary combination in sodium hydroxide, calcium hydroxide, calcium oxide or other alkaline matter when bean clear water is transferred PH.
3, the pretreatment technology of industrial bean clear water according to claim 1 and 2 is characterized in that: described liquid time of repose is 0.5-4 hour.
4, the pretreatment technology of industrial bean clear water according to claim 3 is characterized in that: the concentration of described polymeric aluminum chlorides solution is 1%.
5, the pretreatment technology of industrial bean clear water according to claim 4 is characterized in that: the concentration of described polyacrylamide solution is 1 ‰.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100144750A CN101239760A (en) | 2008-03-10 | 2008-03-10 | Pretreatment technique for industrial bean clear water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100144750A CN101239760A (en) | 2008-03-10 | 2008-03-10 | Pretreatment technique for industrial bean clear water |
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| Publication Number | Publication Date |
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| CN101239760A true CN101239760A (en) | 2008-08-13 |
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| CNA2008100144750A Pending CN101239760A (en) | 2008-03-10 | 2008-03-10 | Pretreatment technique for industrial bean clear water |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649613A (en) * | 2011-02-28 | 2012-08-29 | 谢昕 | Recycling processing technology for legumelin wastewater |
| CN103979711A (en) * | 2014-05-16 | 2014-08-13 | 吴江市英力达塑料包装有限公司 | Method for treating soybean processing wastewater |
| CN104261595A (en) * | 2014-10-21 | 2015-01-07 | 临邑禹王植物蛋白有限公司 | Method for preprocessing soybean protein whey waste water |
| CN104386880A (en) * | 2014-11-24 | 2015-03-04 | 山东禹王生态食业有限公司 | Soybean protein sewage treatment method |
| CN105858952A (en) * | 2016-04-20 | 2016-08-17 | 余荣和 | Sewage pretreatment method |
| CN106006909A (en) * | 2016-07-06 | 2016-10-12 | 临邑禹王植物蛋白有限公司 | Processing method of bean skim wastewater |
| CN108348821A (en) * | 2015-09-08 | 2018-07-31 | 格雷迪安特公司 | System and method for being handled water such as oil field waste by chemical coagulation |
| CN111807548A (en) * | 2020-07-15 | 2020-10-23 | 浙江中诚环境研究院有限公司 | Treatment method for recycling bean sprout wastewater |
-
2008
- 2008-03-10 CN CNA2008100144750A patent/CN101239760A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649613A (en) * | 2011-02-28 | 2012-08-29 | 谢昕 | Recycling processing technology for legumelin wastewater |
| CN103979711A (en) * | 2014-05-16 | 2014-08-13 | 吴江市英力达塑料包装有限公司 | Method for treating soybean processing wastewater |
| CN104261595A (en) * | 2014-10-21 | 2015-01-07 | 临邑禹王植物蛋白有限公司 | Method for preprocessing soybean protein whey waste water |
| CN104386880A (en) * | 2014-11-24 | 2015-03-04 | 山东禹王生态食业有限公司 | Soybean protein sewage treatment method |
| CN108348821A (en) * | 2015-09-08 | 2018-07-31 | 格雷迪安特公司 | System and method for being handled water such as oil field waste by chemical coagulation |
| CN105858952A (en) * | 2016-04-20 | 2016-08-17 | 余荣和 | Sewage pretreatment method |
| CN106006909A (en) * | 2016-07-06 | 2016-10-12 | 临邑禹王植物蛋白有限公司 | Processing method of bean skim wastewater |
| CN111807548A (en) * | 2020-07-15 | 2020-10-23 | 浙江中诚环境研究院有限公司 | Treatment method for recycling bean sprout wastewater |
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Open date: 20080813 |