CN106830589A - A kind of method that sludge sour water solution extracts microbial amino acid - Google Patents
A kind of method that sludge sour water solution extracts microbial amino acid Download PDFInfo
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- CN106830589A CN106830589A CN201710064244.XA CN201710064244A CN106830589A CN 106830589 A CN106830589 A CN 106830589A CN 201710064244 A CN201710064244 A CN 201710064244A CN 106830589 A CN106830589 A CN 106830589A
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- sludge
- amino acid
- acid
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
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- Hydrology & Water Resources (AREA)
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- Organic Chemistry (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The present invention relates to the extracting method that a kind of sludge sour water solution extracts microbial amino acid, 1) with the excess sludge of municipal sewage plant second pond output as raw material, its moisture content is between 70 95%；2) excess sludge that will regulate moisture content inserts steam heating and stirring device, and sludge is heated to 70 DEG C 85 DEG C using steam, destroys the flocculation structure of excess sludge, makes flowable state；3) to adding concentrated hydrochloric acid in the sludge of flow regime, and it is sufficiently stirred for so that sludge pH regulation to 0.5 2；4) sludge that will regulate pH is placed in hydrolysis device, is heated to 105 121 DEG C, keeps the temperature to hydrolyze 0.5 4 hours；5) will complete the mixture after hot acid hydrolysis carries out separation of solid and liquid, respectively obtains filtrate and filter residue, removes insoluble residue, and natural compound amino-acid is contained in filtrate；6) filtrate is concentrated or is dried, obtained microbial amino acid dope or powder.
Description
[technical field]
The present invention relates to sewage sludge process field, more particularly to a kind of sludge sour water solution extracts carrying for microbial amino acid
Take method.
[background technology]
With the increase and the in-depth of degree for the treatment of of wastewater treatment rate, sewage plant sludge yield cumulative year after year, to water source,
Air, soil and human health cause very big harm, are mainly manifested in the following aspects, (1), the harm to water source：Sludge
Without measure stack and landfill during, produce the heavy metal in a large amount of acid, alkalescence, noxious materials and sludge, flowed into after rain
Earth surface water source and penetrate into below earth's surface, cause body of groundwater black smelly, water quality deterioration.The existing ammonia in river in the current whole nation 60%
Nitrogen, volatile phenol, the pollution of permanganate, fluoride severe overweight, the inflow and infiltration of mud waste water in addition, water body lose certainly
Net work energy, the breeding of influence aquatic organism and water resource are utilized.(2), to the pollution of atmospheric environment：Due to burning or prolonged heap
Put, dump sludge and discharge the toxic gas such as a large amount of stench, bioxin, sulfur dioxide, dust and fine particle suspension are with the wind
Migration, causes in air that sulfur dioxide and suspended particulate substance are exceeded, and acid rain phenomenon and airborne dust weather occur again and again.(3), to soil
Harm：Eroded field, sludge yield is about 18,000,000 tons/year, organic matter and heavy metal, and the harmful substance such as pathogen is left
In soil, it is difficult to the material heavy corrosion soil of degraded, polluted underground water source.(4), to the harm of health：Sludge burns
Burn, landfill, discharge a large amount of dust in stacking process Ji the toxic gas such as bioxin, sulfur dioxide, is constituted carcinogenic hidden to human body
Suffer from.Groundwater pollutant content overproof, triggers diarrhoea, blood fluke, trachoma etc., special with bioxin as most serious.
The mud granule of municipal sewage plant discharge is very thin, rich in organic matter, but a large amount of sludge without stabilization treatment at present
There is no normal outlet, any discharge of the not only heavy burden as sewage treatment plant, and sludge and heap are rivals in a contest ring around
The new pollution that border is caused is startling, and the resource of sludge is the direction and goal that world community is pursued, and will be turned into
The unique final outlet of sludge.
Laboratory research rank is also all rested on substantially for the research of the extraction of sludge protein and amino acid both at home and abroad at present
Section, has no that large-scale production is reported, protein equipment is extracted for sludge hydrolytic, and Chinese Patent Application No. is
200610019063.7 disclose a kind of quick lime hydrolysed residual active sludge prepares the production technology of aminosal and sets
It is standby, residual active sludge, water, quick lime are pressed 1：1：0.06 ratio is mixed 20-30 minutes；Mixed liquor is pumped into water
Be hydrolyzed in solution reaction kettle, operating pressure be 0.4-0.7MPa, hydrolysis temperature be 135 DEG C -150 DEG C under conditions of, during hydrolysis
Between be 1-3 hour, it is continuous while insulation in hydrolytic process to be passed through steam and stir hydrolysis mixture；Hydrolysis is finished, using reaction
Residual pressure is directly filtered in kettle；By filtering solution with being concentrated in long tube concentrator after salt acid for adjusting pH value,
Obtain product.The problem that above-mentioned technique is present is as follows：(1), constantly it is passed through steam to be stirred, destroys material in hydrolytic process
Uniformity, it is impossible to ensure the balance of hydrolytic process reclaimed water, influence hydrolysis effect；(2) material directly utilizes residual pressure after, hydrolyzing
Power is filtered, and with the carrying out of filtering, pressure is gradually reduced in kettle, so that separation of solid and liquid can not be completed；(3) material, is hydrolyzed
Before filter plant is entered, cooling device is not provided with, material relies on natural cooling, it is impossible to ensure the whole immediately of hydrolysis
Only, product quality is influenceed；(4) filter immediately then can be too high because of temperature of charge after, hydrolysis is finished, and causes the damage of filter plant
It is bad, it is impossible to complete separation of solid and liquid.
[content of the invention]
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of efficient, and practical sludge hydrolytic extracts micro- life
Thing amino acid extracting method.
The technical solution adopted by the present invention is as follows：
A kind of method that sludge sour water solution extracts microbial amino acid, comprises the following steps：
1) excess sludge with municipal sewage plant second pond output is as raw material, adjust its moisture content to 70-95% it
Between；
2) excess sludge that will regulate moisture content inserts steam heating and stirring device, and sludge to 70 is heated using steam
DEG C -85 DEG C, the flocculation structure of excess sludge is destroyed, make flowable state；
3) to adding concentrated hydrochloric acid in the sludge of flow regime, and it is sufficiently stirred for so that sludge pH regulation to 0.5-2；
4) sludge that will regulate pH is placed in hydrolysis device, is heated to 105-121 DEG C, keeps the temperature to hydrolyze 0.5-4 small
When；
5) will complete the mixture after hot acid hydrolysis carries out separation of solid and liquid, respectively obtains filtrate and filter residue, removes insoluble residual
Slag, contains natural compound amino-acid in filtrate；
6) filtrate is concentrated or is dried, obtained microbial amino acid dope or powder.
Further, extracting method of the invention also has following optimize technique：
In step 1) in, the excess sludge first passes through the flocculation of the high polymer coagulants such as PAM, is then centrifuged or press filtration
In at least one filtering.
In step 2) in, the flocculation structure of the destruction excess sludge is but is not limited only to heating, ultrasound, adds chemistry
At least one in medicament, mechanical agitation.
In step 3) in, in addition to concentrated hydrochloric acid is added, also addition includes at least one in hydrochloric acid, nitric acid, sulfuric acid, acetic acid.
In step 4) in, the hydrolysis device includes at least one in batch-type and continuous reaction kettle.
In step 5) in, the solid-liquid separating method is but is not limited only to settle, is centrifuged, filters, membrane filtration, press filtration, true
At least one in empty, gasification.
In step 6) in, the microbial amino acid dope or powder, more than 60%, amino acid accounts for dry amino acid yield
The 25%-35% of base gross mass.
The method that sludge sour water solution of the invention extracts microbial amino acid, can will cannot stablize the dirt for the treatment of originally
Mud, the especially excess sludge for the treatment of plant's second pond are effectively processed and extracted.Can be by the discarded sludge of script
Microbial amino acid is extracted and utilized, and is turned waste into wealth.
[brief description of the drawings]
Fig. 1 is flow chart of the method for the present invention.
[specific embodiment]
The present invention is elaborated with reference to the accompanying drawings and examples.
As shown in figure 1, the invention discloses a kind of method that sludge sour water solution extracts microbial amino acid, in step S1
In, moisture percentage in sewage sludge is concentrated into moisture content 70%-95%；In step s 2, the excess sludge that will regulate moisture content is inserted
Steam heating and stirring device, sludge is heated to 70 DEG C -85 DEG C using steam, destroys the flocculation structure of excess sludge, is made
Flowable state.
In step sl, excess sludge concentration first passes through the flocculation of the high polymer coagulants such as PAM, is then centrifuged, or
Carry out press filtration.
As one embodiment of the invention, moisture percentage in sewage sludge after set-up procedure S1, after step S1 and step S2, sludge
Reach flowable state.
Used as a preferred embodiment of the present invention, in step sl, sludge after press filtration of flocculating through being concentrated into moisture content 75%；
In step s 2, sludge is by being steam heated to 80 DEG C, and keeps the temperature 30 minutes or so.Sludge can be fully achieved can flow
Dynamic state, meets follow-up high efficiency and extracts requirement.Meanwhile, moisture percentage in sewage sludge is relatively low, reduces follow-up medicament addition and concentrated cost.
In step s3, to concentrated hydrochloric acid is added in the sludge after step S2, mixture pH to 0.5-2 is adjusted, while entering
Row is sufficiently stirred for.In step s 4, sludge is heated to 105-121 DEG C, keeps the temperature to hydrolyze 0.5-4 hours.Ammonia in sludge
Base acid is fully free in step s 4, is dissolved into the aqueous solution.
Used as another preferred embodiment of the invention, the heating tank being related in step S2 and the hydrolytic decomposition pot being related in step S4 are
Same tank body.Sludge is heated reach flowable state after, carry out step S3 operations in same tank body, start simultaneously at and be warming up to
121℃.Reach 121 DEG C to be kept for 0.5 hour, be considered as step S4 and terminate.The embodiment is considered as batch-type sludge sour water solution and extracts micro-
The method of biological amino acid, equipment consumption is few, and heat-energy losses are low.In equipment investment, energy saving, the aspect such as economic benefit has bright
Aobvious advantage.
Present invention additionally comprises step S5 and step S6, in step s 5, the mixture completed after sour water solution is carried out into solid-liquid
Separate, respectively obtain filtrate and filter residue, remove insoluble residue, retain filtrate, natural compound amino-acid is contained in filtrate；In step
In S6, filtrate is concentrated or dried, obtained microbial amino acid dope or powder.
The present invention extracts microbial amino acid by sour water solution, obtains microbial amino acid dope or powder, and amino acid is obtained
More than 60%, amino acid accounts for the 25%-35% of butt gross mass to rate.
Below implementation of the invention is only expressed, the limit to patent of invention scope can not be interpreted as with its description
System.Reply, it is noted that for those skilled in the art and operating personnel, make without departing from the inventive concept of the premise
Some deformations and modification, belong to protection scope of the present invention.Therefore protection scope of the present invention should be with claims
That is defined is defined.
Claims (7)
1. a kind of method that sludge sour water solution extracts microbial amino acid, it is characterised in that comprise the following steps：
1) excess sludge with municipal sewage plant second pond output adjusts its moisture content between 70-95% as raw material；
2) excess sludge that will regulate moisture content inserts steam heating and stirring device, and sludge is heated to 70 DEG C -85 using steam
DEG C, the flocculation structure of excess sludge is destroyed, make flowable state；
3) to adding concentrated hydrochloric acid in the sludge of flow regime, and it is sufficiently stirred for so that sludge pH regulation to 0.5-2；
4) sludge that will regulate pH is placed in hydrolysis device, is heated to 105-121 DEG C, keeps the temperature to hydrolyze 0.5-4 hours；
5) will complete the mixture after hot acid hydrolysis carries out separation of solid and liquid, respectively obtains filtrate and filter residue, removes insoluble residue, filter
Contain natural compound amino-acid in liquid；
6) filtrate is concentrated or is dried, obtained microbial amino acid dope or powder.
2. the method that a kind of sludge sour water solution as claimed in claim 1 extracts microbial amino acid, it is characterised in that in step
1) in, the excess sludge first passes through high polymer coagulant flocculation, be then centrifuged or press filtration at least one filtering.
3. the method that described a kind of sludge sour water solution as claimed in claim 1 extracts microbial amino acid, it is characterised in that
In step 2) in, in the flocculation structure of the destruction excess sludge, including heating, ultrasound, addition chemical agent, mechanical agitation
It is at least one.
4. the method that described a kind of sludge sour water solution as claimed in claim 1 extracts microbial amino acid, it is characterised in that
In step 3) in, in addition to concentrated hydrochloric acid is added, also addition includes at least one in hydrochloric acid, nitric acid, sulfuric acid, acetic acid.
5. the method that described a kind of sludge sour water solution as claimed in claim 1 extracts microbial amino acid, it is characterised in that
In step 4) in, the hydrolysis device includes at least one in batch-type and continuous reaction kettle.
6. the method that described a kind of sludge sour water solution as claimed in claim 1 extracts microbial amino acid, it is characterised in that
In step 5) in, the solid-liquid separating method includes at least in sedimentation, centrifugation, filtering, membrane filtration, press filtration, vacuum, gasification
Kind.
7. the method that described a kind of sludge sour water solution as claimed in claim 1 extracts microbial amino acid, it is characterised in that
In step 6) in, the microbial amino acid dope or powder, more than 60%, amino acid accounts for butt gross mass to amino acid yield
25%-35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710064244.XA CN106830589A (en) | 2017-02-04 | 2017-02-04 | A kind of method that sludge sour water solution extracts microbial amino acid |
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| CN201710064244.XA CN106830589A (en) | 2017-02-04 | 2017-02-04 | A kind of method that sludge sour water solution extracts microbial amino acid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109095622A (en) * | 2018-10-08 | 2018-12-28 | 东北农业大学 | A method of promote sludge to extract flocculant using metazoa |
| CN112408681A (en) * | 2020-11-06 | 2021-02-26 | 陕西麦可罗生物科技有限公司 | Harmless comprehensive treatment process for different agricultural antibiotic fermentation hyphae and high-concentration organic wastewater |
| CN114853311A (en) * | 2022-05-10 | 2022-08-05 | 辽宁华泰环保科技集团有限公司 | Sludge wall breaking related device |
| CN115947511A (en) * | 2022-06-20 | 2023-04-11 | 广东工业大学 | Method for breaking sludge |
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| CN1868929A (en) * | 2006-05-15 | 2006-11-29 | 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 |
| CN101921306A (en) * | 2009-12-29 | 2010-12-22 | 天津市裕川置业集团有限公司 | System and method for extracting microprotein from sludge through hydrolysis |
| CN202465470U (en) * | 2012-02-21 | 2012-10-03 | 北京科力丹迪技术开发有限责任公司 | Hydrothermal reactor of sludge hydrothermal drying treatment device |
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2017
- 2017-02-04 CN CN201710064244.XA patent/CN106830589A/en active Pending
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| CN1868929A (en) * | 2006-05-15 | 2006-11-29 | 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 |
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| CN103253840A (en) * | 2013-05-16 | 2013-08-21 | 广东工业大学 | Method for extracting natural acid-pickling corrosion inhibitor from surplus sludge and application thereof |
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Non-Patent Citations (1)
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| 汪家权等主编: "《生态强省 美好安徽》", 31 July 2013 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109095622A (en) * | 2018-10-08 | 2018-12-28 | 东北农业大学 | A method of promote sludge to extract flocculant using metazoa |
| CN112408681A (en) * | 2020-11-06 | 2021-02-26 | 陕西麦可罗生物科技有限公司 | Harmless comprehensive treatment process for different agricultural antibiotic fermentation hyphae and high-concentration organic wastewater |
| CN114853311A (en) * | 2022-05-10 | 2022-08-05 | 辽宁华泰环保科技集团有限公司 | Sludge wall breaking related device |
| CN114853311B (en) * | 2022-05-10 | 2024-02-09 | 辽宁华泰环保科技集团有限公司 | Sludge wall breaking related device |
| CN115947511A (en) * | 2022-06-20 | 2023-04-11 | 广东工业大学 | Method for breaking sludge |
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Application publication date: 20170613 |
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