CN1369445A - Process for treating sewage to generate active mud and extract protein - Google Patents
Process for treating sewage to generate active mud and extract protein Download PDFInfo
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- CN1369445A CN1369445A CN 02116227 CN02116227A CN1369445A CN 1369445 A CN1369445 A CN 1369445A CN 02116227 CN02116227 CN 02116227 CN 02116227 A CN02116227 A CN 02116227A CN 1369445 A CN1369445 A CN 1369445A
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Abstract
A process for extracting protein from the active mud generated by treating sewage includes dewatering said mud, stirring at 15-90 deg.C for 5-60 min, regulating pH value to 7-12, stirring at constant temp for 5-30 min, filter to obtain aqueous solution of protein, stirring until the pH value of 3-7, laying aside, depositing, removing supernatant, and drying. Its filtered dregs can be used as fuel or feed.
Description
Technical field
The invention relates to the processing and the proteinic extraction of the active sludge that produces in the biochemical processing procedure of sewage, particularly a kind of sewage disposal produces the processing and the method for extracting proteins of active sludge.
Background technology
Along with industrial expansion, the discharging of industrial sewage is more and more, and problem of environmental pollution is subjected to extensive concern, and the sewage biochemical processing is developed rapidly, has suppressed the speed of environmental pollution to a great extent.In the biochemical treatment process of sewage, the organic pollutant in the sewage is converted into microorganism cells, carbonic acid gas and water by the metabolic reaction of microorganism.Therefore, the result of sewage disposal produces a large amount of microorganisms, promptly produces a large amount of active sludge.At present, generally be with behind the activated sludge dehydration, deliver to and stack, regularly ask the peasant to transport and make fertilizer, have then with other mud mixed burnings, or pile and bury processing.With regard to these treatment processs of active sludge, all be the caving-in bash of sewage-farm under the pressure of environmental protection pressure, because these treatment processs bring any benefit can for sewage-farm itself, so, be engaged in the engineering technical personnel of sewage biochemical treatment, all be to study, and obtained very big progress along the thinking that how to reduce active sludge output in the sewage treatment process.
Active sludge is by a large amount of bacteriums, mould, algae, the biotic component of microcosmic such as protozoon and metazoan, absorption mutually between these microorganisms in the active sludge, form small-particle one by one, be called zoogloea, each zoogloea can both form a food chain by the metabolic reaction of microorganism, organism and other nutritive ingredients in the zoogloea absorption waste water, pass through series of biochemical reactions then, these materials are converted into carbonic acid gas, water, or synthetic new somatic cells, and minimizing mud generation, manage to make the vital movement of the microorganism in the active sludge to be controlled at certain special metabolic process exactly, suppress the fissiparity of microorganism cells, thereby reduce the generation of active sludge, but control active sludge generation itself, how many practical significances sewage disposal be there is no, just in order to alleviate processing burden to biochemical sludge, because contain a large amount of pathogenic agent microorganisms in these biochemical sludges, directly being put in the middle of the environment, causing new pollution easily, is exactly to give peasant's as fertilizer sources, still need just can be applied to the field through handling, therefore, produce active sludge in large quantities, can increase the cost of sewage disposal undoubtedly.In recent years, straight news reporting is arranged, Japan has successfully utilized these active sludge as the raw material of producing paper pulp, and obtains good economic interests.But biochemical sludge is made the raw material of papermaking, owing to lack fiber substance, also needs to add other materials, and operation is numerous and diverse, as general sewage-farm, is not easy to promote.
Summary of the invention
Technical problem to be solved by this invention is, a kind of simple processing method is provided, after the biochemical treatment of sewage process, producing a large amount of active sludge handles, from handle activated sludge process, extract protein, to reach solution or to reduce the pollution of active sludge to environment, turn waste into wealth, realize producing the purpose that transforms to the production of economic benefit type from the social benefit type.
For achieving the above object, the present invention adopts following technical scheme to implement: the sewage in sewage-farm is through after the biochemical treatment, produce a large amount of active sludge, the active sludge natural subsidence is concentrated or dewater, water-content appropriateness in the active sludge, make active sludge have good flowability, active sludge is added in the enamel or stainless steel vessel of strap clamp cover, carry out heating in water bath, temperature is controlled within 15-90 degree centigrade and stirs, and be incubated 5-60 minute, be that the NaOH of 5%-30% or the HCl solution of 10%-20% are regulated pH value with concentration again, or use citric acid, H
2SO
4Or NaHCO
3, Na
2CO
3, liming, ammonia soln regulates pH value, pH value is controlled between the 7-12, the viscosity of active sludge suspension at this moment increases, again after agitation condition is incubated 5-60 minute down, viscous fluid is transported in the filter plant filters, obtain filtrate and filter residue, filtrate both had been protein water soln, filter residue then is a cell debris, is exactly waste residue.
The active sludge that aforesaid method is handled, obtain filtrate, it is exactly protein water soln, with filtrate collection, place in enamel or the stainless container, under continuous stirring state, slowly adding concentration is the HCl solution of 10%-20%, and constantly detects the pH value of filtrate, at pH value from the decline process of 7-3, after mixed solution leaves standstill stage by stage, different protein components can form precipitation when different pH values, in time collect bottom settlings respectively, and these sedimentable matters are exactly protein latex, carry out drying, make different types of proteinaceous product; Or when pH value reaches 4.5-5.5, stop to add acid, mixed solution begins layering after leaving standstill certain hour, at this moment, the protein component of most of kind all can form precipitation, and bottom settlings is exactly a protein latex, discharges clear liquid and filters, protein latex is sent into drying machine carry out drying, can make the mixing protein product that contains the multiple proteins composition.
The active sludge that above-mentioned aforesaid method is handled obtains filter residue, is exactly waste residue, and filter residue is pressed into bulk, is used for replacing firewood, or mixes with other feeds and to cook cattle food.
In sum, effect of the present invention is as follows:
Sewage produces a large amount of active sludge through after the biochemical treatment, and active sludge obtains handling, and reduces environmental pollution;
Present method technology is simple, and operation need not be added any additives easily;
Raw material sources belong to waste in the active sludge that wastewater treatment produces, and amount is big, and is inexhaustible;
The protein purposes that is obtained is extremely wide, and is nontoxic, no negative interaction;
Production cost is low, instant effect.With active sludge as extracting proteinic raw material, compare with other biomaterial, its great advantage is exactly cheap, content is abundant, and active sludge is the aggregate of microorganism, and their cytoclasis is easier than other biomaterial, makes proteinic extraction simpler, easier, so production cost is much lower.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail: the sewage in sewage-farm is through after the biochemical treatment, produce a large amount of active sludge, the active sludge natural subsidence is concentrated, dewater, make water-content appropriateness in the active sludge, active sludge through dehydration, if water-content is low excessively, add an amount of clear water, reach active sludge and have good flowability, active sludge is added in the enamel or stainless steel vessel of strap clamp cover, carry out heating in water bath, temperature is controlled within 15-90 degree centigrade, stirring simultaneously, and be incubated 5-60 minute, is that the NaOH of 5%-30% or the HCl solution of 10%-20% are regulated pH value with concentration again, pH value is controlled between the 7-12, also available citric acid, H
2SO
4Or NaHCO
3, Na
2CO
3, solution such as liming, ammoniacal liquor regulate pH value, the viscosity of active sludge suspension at this moment increases, again after agitation condition is incubated 5-60 minute down, viscous fluid is transported in the filter plant filters, obtain filtrate and filter residue, filtrate both had been protein water soln, and filter residue then is a cell debris, was exactly waste residue.
It utilizes the active sludge method for extracting proteins to be: the filtrate of collecting is placed in enamel or the stainless steel vessel, under continuous stirring state, slowly adding concentration is the HCl solution of 10%-20%, and constantly detect the pH value of filtrate, at pH value from the decline process of 7-3, after mixed solution leaves standstill stage by stage, different protein components can form precipitation when different pH values, in time collect bottom settlings respectively, these sedimentable matters are exactly protein latex, carry out drying, make different types of protein; Or when pH value reaches 4.5-5.5, stop to add acid, mixed solution begins layering after leaving standstill certain hour, at this moment, the protein component of most of kind all can form precipitation, and bottom settlings is exactly a protein latex, discharges clear liquid and filters, protein latex is sent into drying machine carry out drying, can make the mixing protein that contains the multiple proteins composition.
As mentioned above, proteinaceous product purity requirement height, the protein latex that will contain the multiple proteins composition carries out semi-permeable membranes repeatedly and filters, and is purified, and then carries out drying, can make high true protein.
In handling active sludge, produce a large amount of filter residues, in order to reduce filter residue, be exactly the pollution of waste residue to environment, according to practical situation, filter residue is used, filter residue is pressed into bulk and is used for replacing firewood, or mixes with other feeds and to cook cattle food.
Describe below in conjunction with specific embodiment: get the active sludge that 1000 grams produce through the sewage-farm biochemical treatment sewage, put into the enamel or the stainless steel vessel of strap clamp cover, carry out heating in water bath, temperature is controlled at 70 degrees centigrade and stirs, and be incubated 30 minutes, be that the HCl solution of 25% NaOH or 20% is regulated pH value with concentration again, make pH value be controlled at 10, the viscosity of active sludge suspension at this moment increases, and after agitation condition is incubated 30 minutes down, viscous fluid is filtered again, obtain filtrate and filter residue, filtrate both had been protein water soln, and filter residue then is a cell debris, was exactly waste residue.
Above-mentioned active sludge obtains filtrate, after treatment with filtrate collection, collecting filtrate both had been protein water soln, the filtrate of collecting was placed in enamel or the stainless container, under continuous stirring state, slowly adding concentration is 10% HCl solution, and constantly detects the pH value of filtrate, when pH value reaches 5, stop to add acid, mixed solution begins layering after leaving standstill certain hour, and bottom settlings is exactly a protein latex, discharges clear liquid and filters, protein latex is carried out drying, can make protein.If proteinaceous product purity requirement height carries out semi-permeable membranes repeatedly with protein latex and filters, purified, and then carried out drying, can make high true protein.About obtainable protein restrained up to 30 from 1000 gram active sludge, economic benefit was very considerable.
In addition, can be according to practical situation, above-mentioned active sludge obtains filter residue after treatment, is exactly waste residue, and these filter residues are used, and filter residue is pressed into bulk and is used for replacing firewood, or mixes with other feeds and to cook cattle food.
From the decline process of 7-3, after mixed solution left standstill stage by stage, different protein components can form precipitation when different pH values at pH value, in time the stage is collected bottom settlings respectively, these sedimentable matters are exactly protein latex, carry out drying, make the protein of different sorts protein component.
Claims (3)
1. a sewage disposal produces the treatment process of active sludge, the sewage in sewage-farm is through after the biochemical treatment, produce a large amount of active sludge, it is characterized in that, the active sludge natural subsidence is concentrated or dewater, water-content appropriateness in the active sludge, make active sludge have good flowability, active sludge is added in the enamel or stainless steel vessel of strap clamp cover, carry out heating in water bath, temperature is controlled within 15-90 degree centigrade and stirs, and is incubated 5-60 minute, be that the NaOH of 5%-30% or the HCl solution of 10%-20% are regulated pH value with concentration again, or use citric acid, H
2SO
4Or NaHCO
3, Na
2CO
3, liming, ammonia soln regulates pH value, pH value is controlled between the 7-12, the viscosity of active sludge suspension at this moment increases, again after agitation condition is incubated 5-60 minute down, viscous fluid is transported in the filter plant filters, obtain filtrate and filter residue, filtrate both had been protein water soln, filter residue then is a cell debris, is exactly waste residue.
2. producing the treatment process of active sludge according to the described sewage disposal of claim 1, after the active sludge treatment, obtain filter residue, is exactly waste residue, it is characterized in that, filter residue is pressed into bulk, is used for replacing firewood, or mixes with other feeds and to cook cattle food.
3. one kind is utilized processing active sludge method for extracting proteins, after the active sludge treatment, obtain filtrate, it is exactly protein water soln, it is characterized in that,, place in enamel or the stainless container filtrate collection, under continuous stirring state, slowly adding concentration is the HCl solution of 10%-20%, and constantly detects the pH value of filtrate, at pH value from the decline process of 7-3, after mixed solution leaves standstill stage by stage, different protein components can form precipitation when different pH values, in time collect bottom settlings respectively, and these sedimentable matters are exactly protein latex, carry out drying, make different types of proteinaceous product; Or when pH value reaches 4.5-5.5, stop to add acid, mixed solution begins layering after leaving standstill certain hour, at this moment, the protein component of most of kind all can form precipitation, and bottom settlings is exactly a protein latex, discharges clear liquid and filters, protein latex is sent into drying machine carry out drying, can make the mixing protein product that contains the multiple proteins composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02116227 CN1369445A (en) | 2002-03-22 | 2002-03-22 | Process for treating sewage to generate active mud and extract protein |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02116227 CN1369445A (en) | 2002-03-22 | 2002-03-22 | Process for treating sewage to generate active mud and extract protein |
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| CN1369445A true CN1369445A (en) | 2002-09-18 |
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|---|---|---|---|
| CN 02116227 Pending CN1369445A (en) | 2002-03-22 | 2002-03-22 | Process for treating sewage to generate active mud and extract protein |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295296C (en) * | 2004-05-28 | 2007-01-17 | 湖北大学 | Use of residual active sludge protein as foam drilling liquid and preparing method thereof |
| CN100371041C (en) * | 2003-04-18 | 2008-02-27 | 湖北大学 | Preparing for protein foam fire-extinguisher by active sludge protein |
| CN100402449C (en) * | 2006-05-15 | 2008-07-16 | 武汉市城市排水发展有限公司 | Production technology of preparing aminosal using hydrolysed residual active sludge by quick lime and its equipment |
| CN100475052C (en) * | 2006-06-01 | 2009-04-08 | 江苏省农业科学院 | Method for producing animal feed additive using city domestic sludge and using method thereof |
| CN101805772A (en) * | 2010-03-26 | 2010-08-18 | 东华大学 | Method for extracting protein from excess sludge |
| CN102690323A (en) * | 2012-06-14 | 2012-09-26 | 哈尔滨工业大学 | Method for recovering sludge through microwave |
| CN101921306B (en) * | 2009-12-29 | 2013-02-13 | 天津市裕川置业集团有限公司 | System and method for extracting microprotein from sludge through hydrolysis |
| CN102977181A (en) * | 2012-11-28 | 2013-03-20 | 天津大学 | Method for extracting protein in biological sludge |
| CN104118964A (en) * | 2014-06-19 | 2014-10-29 | 山东西王糖业有限公司 | Method for separating active protein in sewage treatment process |
| CN104529104A (en) * | 2014-12-30 | 2015-04-22 | 新奥科技发展有限公司 | Sludge pretreatment method |
| CN104628811A (en) * | 2015-01-16 | 2015-05-20 | 江苏科技大学 | Method for extracting total protein of aerobic granular sludge |
| CN105585641A (en) * | 2016-03-04 | 2016-05-18 | 河海大学 | Method for extracting bacterial alginate from activated sludge |
| CN106492611A (en) * | 2016-11-23 | 2017-03-15 | 威海丰泰新材料科技股份有限公司 | A kind of fish meal factory condensation waste gas and the pollution-freeization processing method of condensation waste water |
| CN107082541A (en) * | 2017-03-16 | 2017-08-22 | 贵州民族大学 | A kind of system and method for reclaiming protein and phosphorus in sewage disposal plant excess sludge |
| CN108892703A (en) * | 2018-06-26 | 2018-11-27 | 安徽原上草节能环保科技有限公司 | Method for extracting proteins in a kind of activated sludge from after sewage treatment |
-
2002
- 2002-03-22 CN CN 02116227 patent/CN1369445A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371041C (en) * | 2003-04-18 | 2008-02-27 | 湖北大学 | Preparing for protein foam fire-extinguisher by active sludge protein |
| CN1295296C (en) * | 2004-05-28 | 2007-01-17 | 湖北大学 | Use of residual active sludge protein as foam drilling liquid and preparing method thereof |
| CN100402449C (en) * | 2006-05-15 | 2008-07-16 | 武汉市城市排水发展有限公司 | Production technology of preparing aminosal using hydrolysed residual active sludge by quick lime and its equipment |
| CN100475052C (en) * | 2006-06-01 | 2009-04-08 | 江苏省农业科学院 | Method for producing animal feed additive using city domestic sludge and using method thereof |
| CN101921306B (en) * | 2009-12-29 | 2013-02-13 | 天津市裕川置业集团有限公司 | System and method for extracting microprotein from sludge through hydrolysis |
| CN101805772A (en) * | 2010-03-26 | 2010-08-18 | 东华大学 | Method for extracting protein from excess sludge |
| CN102690323A (en) * | 2012-06-14 | 2012-09-26 | 哈尔滨工业大学 | Method for recovering sludge through microwave |
| CN102977181A (en) * | 2012-11-28 | 2013-03-20 | 天津大学 | Method for extracting protein in biological sludge |
| CN104118964A (en) * | 2014-06-19 | 2014-10-29 | 山东西王糖业有限公司 | Method for separating active protein in sewage treatment process |
| CN104529104A (en) * | 2014-12-30 | 2015-04-22 | 新奥科技发展有限公司 | Sludge pretreatment method |
| CN104628811A (en) * | 2015-01-16 | 2015-05-20 | 江苏科技大学 | Method for extracting total protein of aerobic granular sludge |
| CN105585641A (en) * | 2016-03-04 | 2016-05-18 | 河海大学 | Method for extracting bacterial alginate from activated sludge |
| CN106492611A (en) * | 2016-11-23 | 2017-03-15 | 威海丰泰新材料科技股份有限公司 | A kind of fish meal factory condensation waste gas and the pollution-freeization processing method of condensation waste water |
| CN107082541A (en) * | 2017-03-16 | 2017-08-22 | 贵州民族大学 | A kind of system and method for reclaiming protein and phosphorus in sewage disposal plant excess sludge |
| CN108892703A (en) * | 2018-06-26 | 2018-11-27 | 安徽原上草节能环保科技有限公司 | Method for extracting proteins in a kind of activated sludge from after sewage treatment |
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