CN1059879C - Technological process for removing SO4(-2) and NH4(+)-N and recovering ammonia from waste water of aginomoto industry - Google Patents
Technological process for removing SO4(-2) and NH4(+)-N and recovering ammonia from waste water of aginomoto industry Download PDFInfo
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- CN1059879C CN1059879C CN 97108851 CN97108851A CN1059879C CN 1059879 C CN1059879 C CN 1059879C CN 97108851 CN97108851 CN 97108851 CN 97108851 A CN97108851 A CN 97108851A CN 1059879 C CN1059879 C CN 1059879C
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- waste water
- mixed solution
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- monosodium glutamate
- neutralization
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Abstract
The present invention relates to the treatment and the application of industrial waste water containing SO4<2-> and NH4<+>-N. The technological method mainly comprises: (1) 1 to 3 wt% of lime and 0.0005 to 0.005 wt% of polymer flocculant PAM are added for first neutralization, flocculation and precipitation; (2) the precipitate is put in a circulation evaporator, evaporated and refluxed in a heating state at normal pressure or in vacuum, so that NH4<+>-N is volatilized in the form of NH3, and ammonia water is recovered at normal pressure or in a compression state; (3) 1 to 2 wt% of MgO/CaO additive and 0.0005 to 0.005 wt% of polymer flocculant PAM are added for second neutralization, flocculation and precipitation. The method has the advantages of more than 90% removal rate of SO4<2-> and NH4<+>-N, low equipment investment, simple process, easy acquirement of raw materials, low operation cost, easy popularization, obvious social benefit and favorable economic benefit.
Description
The present invention relates to contain SO
4 2-And NH
4 +-N Industrial Wastewater Treatment and comprehensive utilization are meant that specifically the monosodium glutamate trade effluent takes off SO
4 2-, remove NH
4 +-N and recovery ammonia process method.
The monosodium glutamate trade effluent is that the gourmet powder fermenting mash is extracting the mother liquor that produces behind the L-glutamic acid, because extraction technology of glutamic acid difference, monosodium glutamate waste liquid quantity and component difference.The overwhelming majority of China Gourmet Powder Factory is that raw material is produced monosodium glutamate through fermentation with grain.Extract L-glutamic acid with isoelectric point method economical and effective the most, and the conditioning agent of regulating iso-electric point is then with vitriolic consumption maximum, most economical.1 ton of monosodium glutamate of every production produces 20～25 tons of high concentrated organic wastewaters approximately, and the pH value is 3～7, COD
CrValue is up to 6～80,000 mg/L, SO
4 2-Content is up to 3.0～5.0%, NH
4 +Content is up to 0.6～0.8%, and solid content is 8～12%.
Existing Gourmet Powder Factory in the whole nation or workshop more than 200 families, produce about 550,000 tons of monosodium glutamates per year, occupy first place in the world,, the trade effluent in the present monosodium glutamate industry production, most unprocessed, directly enter rivers, cause the water body dissolved oxygen to reduce, cause water quality deterioration, having a strong impact on water ecological environment, is China organic contamination source rich and influential family.
At present, the improvement of China's gourmet powder waste water and utilize many places in lab scale and pilot scale stage, industrial applications is also seldom.In recent years, the monosodium glutamate wastewater treatment technology adopts biological process more, wherein the production yeast-anaerobic-aerobic of Guangxi Gourmet Powder Factory-oxidation pond level Four treatment process has obtained domestic relevant expert's approval, thinks that this cover technology is fit to China's national situation, and running cost is low, effective.Yet test-results shows, though the gourmet powder waste water CODcr that produces behind the yeast has reduced by 30～60%, its SO
4 2-And NH
+ 4The content of-N is still high.Research is proof also, as long as SO
4 2-And NH
+ 4The content height of-N, anaerobic and aerobic are handled and just can't normally be carried out, and cause " yeast-anaerobic-aerobic-oxidation pond " level Four to handle this optimization technology and do not adopt for domestic manufacturer so far.Exactly because the CODcr of gourmet powder waste water and SO
4 2-, NH
+ 4-N concentration height causes monosodium glutamate wastewater treatment to become a global difficult problem, and Japan and Taiwan are exactly to have to stop glutamate production or do not adopt above-mentioned production of gourmet powder because the waste water handling problem of monosodium glutamate is unresolved.Zhoukou City, Henan Gourmet Powder Factory of China's maximum and Guilin Gourmet Powder Factory etc. are limited turnout because waste water handling problem can't resolve by national environmental protection department; other Gourmet Powder Factory is being faced with the crisis of being limited the production or stopping production also along with the enhancing of local environmental consciousness.
The objective of the invention is, the knotty problem according to prior art exists provides a kind of and can reduce SO in the high-concentration gourmet powder trade effluent effectively
4 2-, NH
+ 4The content of-N reduces the total CODcr value of waste water simultaneously, thereby has solved the SO that takes off of a crucial difficult problem for follow-up aerobic, anaerobic treatment
4 2-, remove NH
4 +-N reclaims the processing method of ammonia.
The objective of the invention is to realize by following processing method:
A kind of monosodium glutamate trade effluent take off SO
4 2-, remove NH
+ 4The processing method of-N and recovery ammonia is characterized in that this processing method may further comprise the steps:
Step 1: the neutralization first time, flocculation sediment
At first in the monosodium glutamate trade effluent, add lime and stirring by waste water weight (as follows) 1～3%, add polymeric flocculant polyacrylamide 0.0005～0.005% (weight) then, stop after stirring stirring the mixed solution natural sedimentation, throw out is as industrial raw material, SO
4 2-The mixed solution of clearance 20～40% is then become dark brown by oyster white;
Step 2: NH is taken off in evaporation
4-N also reclaims ammonia
Mixed solution is put in the circulation spray evaporator, and under 30～80 ℃, normal pressure or vacuum-evaporation make NH
+ 4-N is with NH
3Form volatilization, ammoniacal liquor, NH are reclaimed in normal pressure or compression
4The mixed solution natural sedimentation of-N clearance more than 90%, throw out is made industrial raw material;
Step 3: the neutralization second time, flocculation sediment
Through natural sedimentation, SO
4 2-Add the MgO/CaO additive of 1～2% (weight) in the mixed solution of clearance 50～60%, slowly polymeric flocculant polyacrylamide 0.0005～0.005% (weight) is moments later added in stirring, stop after slowly stirring stirring, the rapid natural sedimentation of mixed solution, throw out is as industrial raw material, and water white clear liquid solid content is 1～2% (weight), SO
4 2-Weight content is that 0.5% (weight) is following, NH
+ 4-N content is that 0.07% (weight) is following, the CODcr value is 1～1.5 * 10
4The liquid of mg/L send anaerobism, aerobic biochemical to handle.
Lime is a kind of good neutralization, coagulating agent, adds behind the high-molecular coagulant adopting polyacrylamide not only SO
4 2-Can be with CaSO
4Form precipitation, and the flocculation wadding spends greatly, sedimentation speed is fast.For the second time add weakly alkaline MgO, further precipitate SO in the waste water
4 2-, make it with CaSO
4And MgSO
4Form further form wadding flower, do not influence the pH value of waste water simultaneously again, so that the anaerobic waste water of follow-up phase, biochemical treatment such as aerobic.Waste water CODcr after the secondary flocculation treatment can remove more than 70% NH
+ 4-N, SO
4 2-Can remove more than 90%.
The present invention compared with prior art has following advantage:
1, contains SO
4 2-3～5% (weight), NH
+ 4The monosodium glutamate trade effluent of-N 0.6～0.8% (weight), pH value 3～7 and solid substance 8～12% (weight) adopts the present invention, its SO
4 2-Clearance 90%, NH
+ 4The clearance of-N is more than 90%, and the clearance of CODcr is more than 70%, and pH value 5～9 is taken off SO
4 2-, remove NH
+ 4-N effect highly significant, therefore, this law technology is reasonable, has solved technical barrier for further carrying out biochemical treatments such as anaerobic and aerobic, can reduce the contaminated wastewater degree.
To get Guangdong Province Gourmet Powder Factory waste water is example, and it is as follows to adopt this law to handle the front and back Analysis Results of Water Quality:
| Sample number | The pH value | CODcr(mg/L) | NH + 4-N(％) | SO 4 2-(％) | Clearance (%) | ||||||
| Before the processing | After the processing | Before the processing | After the processing | Before the processing | After the processing | Before the processing | After the processing | CoDcr | NH 4 + | SO 4 2- | |
| 1 2 3 | 3.00 3.67 5.30 | 5.10 5.14 6.44 | 5.6×10 46.0×10 44.6×10 4 | 1.4×10 41.5×10 41.1×10 4 | 0.62 0.64 0.77 | 0.0285 0.0485 0.0399 | 3.1 3.2 4.5 | 0.0155 0.0029 0.0296 | 74.5 74.5 75.53 | 95.4 92.4 94.8 | 99.5 99.9 99.3 |
2, the monosodium glutamate trade effluent not only takes off SO with the physicochemical method of neutralization, flocculation sediment, evaporation
4 2-, remove NH
+ 4-N, and normal pressure or compression reclaim ammoniacal liquor, throw out can be made industrial raw material again, for the comprehensive utilization of monosodium glutamate trade effluent provides a technological line.
3, this law facility investment is few, processing step is simple, easy to operate, running cost is low, raw materials such as neutralization, mixed, coagulating agent and flocculation agent are easy to get, and therefore easily apply, expectation will obtain remarkable social benefit and good economic benefit.
The invention will be further described by following embodiment, and component concentration is all by the waste water weight percent meter among following each embodiment.
Embodiment 1:
The monosodium glutamate trade effluent takes off SO
4 2-, remove NH
+ 4-N processing method step is as follows:
Step 1: the neutralization first time, flocculation sediment
At SO
4 2-3.10%, NH
+ 4-NO.62%, solid substance are 11.5%, CODcr is 5.6 * 10
4Add 2.1% lime in Gourmet Powder Factory's waste water of mg/L, stirred 5 minutes, add polymeric flocculant polyacrylamide 0.0015% then, slowly stirred 8 minutes, stop to stir back natural sedimentation 10 minutes, throw out is as industrial raw material, mixed solution becomes dark brown by oyster white, contains SO
4 2-Be 2.17%, clearance is 30%.
Step 2: NH is taken off in evaporation
+ 4-N also reclaims ammoniacal liquor
Mixed solution is put in the circulating evaporator, be heated to 50 ℃, reflux 45 minutes makes NH
4 +-N is with NH
3The form volatilization is reclaimed ammoniacal liquor, NH in the mixed solution
4 +-N content is 0.062%, and clearance is more than 90%, and mixed solution was through natural sedimentation 10 minutes, and throw out is made industrial raw material.
Step 3: the neutralization second time, flocculation sediment
Through natural sedimentation, SO
4 2-Content is that interpolation weight ratio of mixture is MgO: CaO=9 in 1.55% mixed solution: 1 MgO/CaO additive 1.2%, slowly stir the back and add polymeric flocculant polyacrylamide 0.0005%, slowly stir, natural sedimentation got final product in 5 minutes water white clear liquid, solid content is 1.7%, SO
4 2-0.0155%, NH
+ 4-N0.0285%, CODcr are 1.42 * 10
4Mg/L, pH5.10 send anaerobism, biochemical treatment such as aerobic.
Embodiment 2:
The monosodium glutamate trade effluent takes off SO
4 2-, remove NH
4 +-N processing method step is as follows:
Step 1: the neutralization first time, flocculation sediment
Containing SO
4 2-3.213%, NH
4 +-N 0.64%, solid substance are 10%, CODcr6.0 * 10
4Add 1.5% lime and stirring in the monosodium glutamate trade effluent of mg/L, add polymeric flocculant polyacrylamide 0.0015% then, slowly stir, stop to stir the back natural sedimentation, throw out is as industrial raw material, and mixed solution is become dark brown by oyster white, SO
4 2-Content is 2.25%, and clearance is 30%;
Step 2: NH is taken off in evaporation
+ 4-N reclaims ammonia
Mixed solution is put in the circulating evaporator, be heated to 45 ℃, compression, evaporation make NH
+ 4-N is with NH
3The form volatilization, normal pressure reclaims ammoniacal liquor, NH in the mixed solution
+ 4-N content is 0.0485%, and clearance is more than 90%, and mixed solution is through natural sedimentation, and throw out is as industrial raw material.
Step 3: the neutralization second time, flocculation sediment
Through natural sedimentation, SO
4 2-Content reduces to 1.62%; Adding the weight ratio of mixture in mixed solution is MgO: CaO=8: 2 MgO/CaO additive 1.4%, slowly stir the back and add polymeric flocculant polyacrylamide 0.0005%, slowly stir, natural sedimentation get final product water white clear liquid, solid content is 1.2%, SO
4 2-Content is 0.0029%, NH
+ 4-N content is 0.0485%, and CODcr is 1.3 * 10
4Mg/L, pH5.14, mixed solution send anaerobism, biochemical treatment such as aerobic.
Embodiment 3:
The monosodium glutamate trade effluent takes off SO
4 2-, remove NH
+ 4-N processing method step is as follows:
Step 1: the first step neutralization, flocculation sediment
Containing SO
4 2-4.519%, NH
+ 4-N 0.77%, solid substance are 9.5%, CODcr4.6 * 10
4Add 1.8% lime stirring in the monosodium glutamate trade effluent of mg/L, add polymeric flocculant polyacrylamide 0.0015% then, slowly stir, stop to stir the back natural sedimentation, throw out is as industrial raw material, and mixed solution is become dark brown by oyster white, SO
4 2-Content is 3.16%, and clearance is more than 30%;
Step 2: NH is taken off in evaporation
+ 4-N, recovery ammonia
Mixed solution is put in the circulating evaporator, be heated to 60 ℃, atmospheric evaporation makes NH
+ 4-N is with NH
3The form volatilization, ammoniacal liquor, NH in the mixed solution are reclaimed in compression
+ 4-N content is 0.0399%, and clearance is more than 90%, and mixed solution is through natural sedimentation, and throw out is as industrial raw material.
Step 3: the neutralization second time, flocculation sediment
Through natural sedimentation, SO
4 2-Content reduces to 2.15%, adding the weight ratio of mixture in mixed solution is MgO: CaO=9: 1 MgO/CaO additive 1.8%, slowly stir the back and add polymeric flocculant polyacrylamide 0.0025%, slowly stir, natural sedimentation get final product water white clear liquid, solid content is 1.1%SO
4 2-Be 0.0296%, NH
+ 4-N is 0.0399%, and CDDcr is 1.1 * 10
4Mg/L, pH6.44, mixed solution send anaerobism, biochemical treatment such as aerobic.
Claims (1)
1, a kind of monosodium glutamate trade effluent takes off SO
4 2-Remove NH
+ 4The processing method of-N and recovery ammonia is handled the monosodium glutamate trade effluent by coagulating sedimentation, it is characterized in that this processing method may further comprise the steps:
Step 1: the neutralization first time, flocculation sediment
At first in the monosodium glutamate trade effluent, add lime and stirring by waste water weight 1～3%, add 0.0005～0.005% polymeric flocculant polyacrylamide then by waste water weight, stop after stirring stirring, mixed liquid natural sedimentation, throw out is as industrial raw material;
Step 2: NH is taken off in evaporation
4-N also reclaims ammonia
Step 1 mixed solution supernatant liquor is put in the circulation spray evaporator, and under 30～80 ℃, normal pressure or vacuum-evaporation make NH
+ 4-N is with NH
3Form volatilization, ammoniacal liquor, NH are reclaimed in normal pressure or compression
4The mixed solution natural sedimentation of-N clearance more than 90%, throw out is made industrial raw material;
Step 3: the neutralization second time, flocculation sediment
Through natural sedimentation, SO
4 2-Add MgO/CaO additive in the mixed solution of clearance 50～60% by waste water weight 1～2%, slowly 0.0005～0.005% polymeric flocculant polyacrylamide by waste water weight is moments later added in stirring, stop after slowly stirring stirring, the rapid natural sedimentation of mixed solution, throw out is as industrial raw material, water white clear liquid send anaerobism, aerobic biochemical to handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108851 CN1059879C (en) | 1997-03-14 | 1997-03-14 | Technological process for removing SO4(-2) and NH4(+)-N and recovering ammonia from waste water of aginomoto industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108851 CN1059879C (en) | 1997-03-14 | 1997-03-14 | Technological process for removing SO4(-2) and NH4(+)-N and recovering ammonia from waste water of aginomoto industry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1164514A CN1164514A (en) | 1997-11-12 |
| CN1059879C true CN1059879C (en) | 2000-12-27 |
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ID=5170695
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97108851 Expired - Fee Related CN1059879C (en) | 1997-03-14 | 1997-03-14 | Technological process for removing SO4(-2) and NH4(+)-N and recovering ammonia from waste water of aginomoto industry |
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|---|---|
| CN (1) | CN1059879C (en) |
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| CN102173881A (en) * | 2010-12-29 | 2011-09-07 | 菱花集团有限公司 | Production method of amino acid plant nutrient solution |
| CN105174443B (en) * | 2015-09-09 | 2017-05-17 | 呼伦贝尔东北阜丰生物科技有限公司 | Treatment process for wastewater produced by extracting monosidum glutamate by concentrating isoelectric points |
| CN105712453B (en) * | 2016-02-01 | 2018-08-28 | 天津理工大学 | A kind of desalination method of the potassium sulfate containing high concentration and aqueous sodium persulfate solution |
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| Publication number | Publication date |
|---|---|
| CN1164514A (en) | 1997-11-12 |
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