CN105271625B - A kind of clean preparation method improving the residual active sludge energy resource rate of recovery - Google Patents
A kind of clean preparation method improving the residual active sludge energy resource rate of recovery Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A kind of clean preparation method improving the residual active sludge energy resource rate of recovery, this method comprises: the moisture content that (1) squeezes to sludge sludge is 75-80%；(2) by after squeezing sludge and water in 1g/3-5ml ratio re-mix impregnate 2h；(3) above-mentioned mixed liquor is stirred and is aerated, natural subsidence is carried out to the mixed liquor after stirring aeration after 12-72h；(4) supernatant in step (3) is discharged into MAP precipitation reactor by adding magnesium salt solution and microcosmic salt solution, adjust P/Mg/N molar ratio 1/1.2/1, reacting solution pH value 8.9 ± 0.1 is adjusted with 5MNaOH, supernatants after precipitation is discharged into anaerobism conditioning tank, precipitating is discharged into separating and reclaiming device recycling precipitating；(5) the precipitating bed mud in the supernatant and step (3) after precipitating MAP in step (4) after natural subsidence is discharged into anaerobism conditioning tank respectively, and the methane phase that further ferments recycles the energy.Operation of the present invention is convenient and easy, does not introduce new chemical substance, and operating cost is low.
Description
Technical field
The present invention relates to a kind of clean preparation methods for improving the residual active sludge energy resource rate of recovery, realize at sewage
Factory high efficiente callback resource, energy targets from residual active sludge are managed, residual active sludge processing and resource technology neck are belonged to
Domain is a kind of clean manufacturing new technology.
Background technique
The sewage treatment plant in the whole nation about 86.2% uses activated sludge process, the residual active sludge generated during processing
Volume ratio accounts for about the 0.3%~0.5% of sewage treatment total amount, and processing disposal costs typically constitute the 40%- of sewage treatment operating cost
60% or more.The processing mode generallyd use at this stage is with soot landfill stabilization or based on the sewage plant Anaerobic Digestion.It is right
The landfill place that sludge dewatering carries out landfill stabilization needs is big, sludge freight is high, and is also easy to produce underground water pollution and smelly
The secondary pollutions problems such as gas dissipation；And the simple anaerobic digestion process for activated sludge is not to its resource recycling.It is living
Property sludge in content of organics 60% or so, for the degradable organic component of biology 40% or more, phosphorus accounts for about mud dry weight
5.0%, the content of nitrogen more horn of plenty about 8-9.3%, therefore contain great resource in activated sludge, in processing disposition
The recycling of resource and the energy should be considered first.
The pretreatment mode of economical and efficient has very important effect to recycling sludge recovery energy is improved.Report at present
The sludge pre-treatment method in road has microwave method, supercritical ultrasonics technology, heating, freeze-thaw method, high pressure homogenization method, bead mill method, ozone oxidation
Method, wet oxidation process, acid system and biology crack method i.e. enzyme process etc., respectively have feature, but practical application to the effect that cracks of sludge
When the high requirements on the equipment, the problems such as there are complicated for operation and security risks, many technologies are difficult to carry out engineer application.Chinese invention
Patent " sludge carbon source two-stage alkaline hydrolysis acidizing recovery method " (CN101708932B), Chinese invention patent " locate in advance by alkaline hydrolysis
Reason-ammonium phosphate magnesium processes recycling phosphorus nitrogen-anaerobic digestion methane phase integrated technique processing excess sludge method "
(201310708860.6) it is pre-processed using alkaline hydrolysis and resource utilization is carried out to residual active sludge, alkaline hydrolysis mode, which pre-processes, to be promoted
Melt born of the same parents into sludge and discharge nitrogen phosphorus, has preferable effect to sludge reduction, but sludge liquid coloration is very heavy after alkali process, such as through
Dark brown is presented in supernatant after crossing 5%NaOH processing sludge, and contains a large amount of Na in alkali process+、OH-Etc. causing supernatant salt solution
Degree is big, alkalinity is high, will increase subsequent processing effluent color dilution, salinity, is unfavorable for discharged wastewater met the national standard, especially treatment fluid pH value
Height is unfavorable for subsequent Anaerobic Digestion, cannot achieve comprehensive specific resistance to filtration and resource utilization.
The present invention carries out the mechanical dehydration facility of minimizing processing using sewage plant to sludge, i.e. sewage plant conventional machinery is de-
Wetting system: plate and frame filter press, vacuum filter, belt filter press and centrifuge etc. are filtered squeezing to sludge, mechanical force
Effect will cause mud granule extruding and crack, and sludge flocculation structure is destroyed, microbial cell cracking, intracellular organic matter outflow.Hair
Bright people has found especially to exist after re-mixing sludge and water that mechanical expression is crossed there is a phenomenon where melting born of the same parents to discharge the substances such as nitrogen phosphorus
Lower its of micro- aeration stirring effect melts born of the same parents and discharges nitrogen, phosphorus concentration much higher than nitrogen, phosphorus maximum release concentration in alkaline hydrolysiss, and solubility is organic
Object (SCOD) also improves about 70%, plays an important role for the raising of later period anaerobic methane production efficiency.Therefore change sludge treatment technique
Route, with the technology path of " sludge pressing is dehydrated-remixes-aeration stirring-MAP precipitating-anaerobic fermentation " to residual activity dirt
Mud carries out recycling recycling, the defect that alkaline hydrolysis can be overcome to handle, and nitrogen phosphor resource and the methane energy rate of recovery are improved 2-3 times,
The final annual mud discharging volume of sewage plant reduces 70-90%, is a kind of new skill of clean and effective Resource recovery energy from sludge
Art.Compared with other processing techniques, the present invention reaches the target of sludge recycling using sewage plant existing utility, easy to operate easy
Row, with acid, alkali process liquid phase ratio, do not introduce new chemical substance, treatment fluid is close with raw sewage color, and sludge resource and
The recycling of the energy reduces sewage plant operating cost by 20-40%, reaches the target that sewage plant implements clean manufacturing.
Summary of the invention
Sewage treatment plant lacks residual active sludge recycling, the technical matters of energy recycling and reusing at present, with reality
Clean manufacturing is applied there are also very big gap, it is raw that the present invention provides a kind of cleaning for improving the residual active sludge energy resource rate of recovery
Production method.
Change current sludge treatment technique route, using sewage plant mechanical dehydration facility as sludge disintegration method, by machine
The dewatered squeezing sludge of tool mixes immersion again with water with certain mass volume ratio, by aeration stirring mode special designing
Sludge nitrogen phosphorus substance is discharged into mixed liquor, mixed liquor concentration of nitrogen and phosphorus can be made to be up to 420-490mg/L and 120- respectively
210mg/L or more is more than 30-180mg/L and 20-150 mg/L ammonia nitrogen and orthophosphates concentration in alkaline hydrolysis technique.To mixing
Further using the MAP precipitation method and Chinese patent 201420458242.0, " a kind of pair of phosphorus in waste water nitrogen carries out guanite money to liquid nitrogen phosphorus
The device of sourceization recycling " carries out separation and recovery as slow-release fertilizer to this nitrogen phosphorus precipitating and utilizes, and the rate of recovery of ammonia nitrogen is 86-95%, molten
The rate of recovery of solution property phosphorus is 90-99%, to the rate of recovery 40-60% of sludge total nitrogen phosphorus, is above alkaline hydrolysis treatment process recovery of nitrogen and phosphorus
Rate.Sludge is further passed through anaerobic fermentation methane phase after recycling nitrogen phosphorus to recover energy, methane high specific factor of created gase is up to 1.03-
1.38 L/(gVS), it is higher than common anaerobic technique methane production.By methane gas burn heat production or power generation can and nitrogen phosphorus
High efficiente callback can effectively reduce sewage plant 20-40% operating cost.Residual active sludge is after the present invention recycles, finally
Annual mud discharging volume reduces 70-90%, is a kind of new technology of clean and effective Resource recovery energy from sludge, realizes
The theory of sewage treatment plant's clean manufacturing.
Based on above-mentioned, the present invention provides a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery,
This method comprises:
(1) moisture content for being squeezed sludge to sludge is 75-80%；
(2) by after squeezing sludge and water in 1g/3-5ml ratio re-mix impregnate 2h；
(3) above-mentioned mixed liquor is stirred and is aerated, it is heavy to carry out nature to the mixed liquor after stirring aeration after 12-72h
Drop；
(4) supernatant in step (3) is discharged into MAP precipitation reactor by adding magnesium salt solution and microcosmic salt solution, is adjusted
Whole P/Mg/N molar ratio 1/1.2/1 adjusts reacting solution pH value 8.9 ± 0.1 with 5MNaOH, makes supernatant under stirring conditions
MAP precipitation reaction occurs for nitrogen phosphorus in liquid, supernatants after precipitation is discharged into anaerobism conditioning tank, precipitating is discharged into separating and reclaiming device and returns
Receive precipitating；
(5) the precipitating bed mud in the supernatant and step (3) after precipitating MAP in step (4) after natural subsidence is arranged respectively
Enter anaerobism conditioning tank, mixed liquor pH value is adjusted to after 7.9-8.5 to be discharged into anaerobism anti-using the alkali in precipitating bed mud by mixing
Device is answered, the methane phase that further ferments recycles the energy.
In step (3), stirring rate 150-400rpm, agitating mode stop 5 seconds for 10 seconds for every turn, aeration quantity 3L/L
min。
In step (3), the concentration of ammonia nitrogen and dissolved phosphorus respectively reaches 420- in the supernatant after measuring natural subsidence
490mg/L and 120-210mg/L, SCOD are discharged into MAP precipitation reactor in 3500-6400mg/L, then by supernatant.
In step (4), agitating mode is that 800rpm is stirred after five minutes, is reduced to 200rpm and stirs 15 minutes, stops stirring
After precipitate 2-3h.
The mass percent concentration of the magnesium salt solution is 17%, and the magnesium salt solution is MgCl2Solution, MgSO4Solution and
One of MgO solution；The mass percent concentration of the microcosmic salt solution is 5%, and the microcosmic salt solution is NaH2PO4Solution,
Na2HPO4Solution, Na3PO4Solution, KH2PO4Solution and K2HPO4One of solution.
The mechanical equipment squeezed to sludge is all kinds of devices that sewage treatment plant carries out mechanical dehydration to sludge, such as true
Empty filter, plate and frame filter press, belt filter press or centrifuge.Squeezing is filtered to sludge, the effect of mechanical force will cause
Mud granule extruding cracks, and sludge flocculation structure is destroyed, microbial cell cracking, intracellular organic matter outflow.
Among the above, it can be the draining of sewage plant secondary settling tank with sludge blending water, sewage plant fresh water use can be saved in this way
Amount, while reducing total amount of sewage discharge.
Among the above, the excess sludge is residual active sludge, dense in the secondary settling tank or mud storage pool of municipal sewage plant
Contracting pond sludge, dewatered sludge and anaerobically digested sludge, including treated excess sludge；It is described processing include acid, alkali, heat,
One or more of ozone, ultrasound.
Above-mentioned muddy water mixed solution is stirred and is aerated, so that mud granule is melted born of the same parents and cracks, promotes sludge extracellular
Polymer removing or sludge clasmatosis release Dissolve N and P, dissolved organic carbon, polysaccharide, protein etc. enter mixed liquor
In.
The anaerobic reactor is to be thoroughly mixed formula anaerobic reactor, up-flow anaerobic sludge blanket, anaerobic filter, anaerobism
Baffle reactor, anaerobic expanded granular sludge bed or Anaerobic Sequencing Bath Reactor.The material that reactor is fed every time after running well
Liquor ratio 1/3-1/5, COD removal rate 85-90% or more, methane high specific factor of created gase reach 1.03-1.38 L/(gVS).Anaerobism
Sludge is finally using landfill disposal is carried out in reactor after mechanical dehydration, with residual active sludge phase after initial mechanical dehydration
Than VSS reduces 80-90%, and annual final mud discharging volume reduces 70-90%.Greatly reduce sewage plant sludge processing disposition
Expense, methane gas burning heat production or power generation can and nitrogen phosphorus high efficiente callback can effectively reduce sewage plant 20-40% operation at
This, realizes the theory of sewage treatment plant's clean manufacturing.
The present invention has good effect below:
(1) a whole set of clearer production technology route recycled to residual active sludge is provided for sewage treatment plant, makes up mesh
The technological deficiency that preceding sewage plant utilizes residual active sludge.Compared with current alkaline hydrolysis technique, sufficiently realize to nitrogen phosphorus in sludge
The target that resource and high efficiency of energy recycle, and new pollutant is not introduced, there is significant economic benefit, environmental benefit.
(2) achieve the effect that sludge melts born of the same parents and discharges nitrogen phosphorus using sewage plant mechanical dewatering equipment, be added without the chemistry such as acid, alkali
Substance impregnates 2h after re-mixing dewatered sludge and water in 1g/3-5ml ratio, is up to respectively to nitrogen phosphorus release concentration
370-550mg/L and 170-300mg/L or more, be higher than alkaline hydrolysis pretreatment in 30-180mg/L and 20-150 mg/L ammonia nitrogen and
Orthophosphates concentration, and be the draining of sewage plant secondary settling tank with sludge blending water, high degree is saved sewage plant fresh water and is used
Amount reduces total amount of sewage discharge simultaneously.
(3) bed mud is mixed with MAP supernatants after precipitation again after squeezing sludge is re-mixed agitated aeration with water by the present invention
It closes, effectively achievees the purpose that adjust anaerobic fermentation water inlet pH value, using the alkali neutralization ability of sludge itself, save sour dosage, gram
Sludge pH is high after having taken alkaline hydrolysis processing, the big defect for needing acid adding to adjust.
(4) compared with initial residual activated sludge, VSS is reduced the sludge finally discharged after the technology of the present invention route processing
80-90%, final discharge volume reduce 70-90%, can greatly reduce Treatment of Sludge expense than prior art.
Specific embodiment
Embodiment one:
The residual active sludge of municipal sewage plant's secondary settling tank is passed through into centrifuge dehydration, moisture percentage in sewage sludge
78.1%, this sludge 100g are mixed with 400mL secondary clarifier effluent in stirring aeration tank, are opened aerator and are adjusted tolerance 3L/L
Min opens agitating device and controls stirring rate 300rpm, and agitating mode is that pulse interval type, that is, every turn stops 5 seconds for 10 seconds.It is handling
Time be respectively 12h, for 24 hours, 48h, 72h, 90h, 110h when sampling analysis, measure supernatant in Dissolve N and P concentration, locating
Respectively 428.8mg/L and 120.9mg/L, SCOD 3806.7mg/L when managing time 12h.With the extension of processing time, 72h
When ammonia nitrogen concentration be 458.2mg/L, dissolved phosphorus concentration reaches 199.2mg/L, SCOD 5842.6mg/L.
After this is mixed liquid precipitate, water outlet is discharged into MAP precipitation reactor, adds 5%Na3PO4Solution and 17%MgCl2It is molten
Liquid makes P/Mg/N molar ratio 1/1.2/1, adjusts reacting solution pH value 9.0 with 5MNaOH, is stirred when adding medicament,
Agitating mode be 800rpm stir after five minutes, be reduced to 200rpm stir 15 minutes, stop stirring after precipitate 3h, ammonia in supernatant
The rate of recovery of nitrogen is 89%, and the rate of recovery of dissolved phosphorus is 93.9%.To the precipitating Chinese patent 201420458242.0 of generation
" device that a kind of pair of phosphorus in waste water nitrogen carries out guanite resource utilization " separates and recovers, and measures ammonium magnesium phosphate content in precipitating
93.3% or more.
Bed mud after above-mentioned stirring aeration and MAP supernatants after precipitation are mixed in anaerobism conditioning tank, mixed liquor pH value
8.37, then it is discharged into Anaerobic Sequencing Bath Reactor, inoculation anaerobic sludge starts reactor, what reactor was fed every time after running well
Solid-liquid ratio 1/3-1/5, COD removal rate 85-90% or more, methane high specific factor of created gase 1.13-1.27 L/(gVS).Anaerobism is anti-
It answers and sludge is discharged in device finally using landfill disposal is carried out after mechanical dehydration, compared with initial residual activated sludge, VSS is reduced
80-90%, discharge volume reduce 70-90%.Specific resistance to filtration expense is greatly reduced, sewage treatment plant's clean manufacturing is realized
Theory.
Sludge alkaline hydrolysis processing comparison technique is carried out simultaneously, and each 400ml of secondary settling tank residual active sludge is taken to be distributed into 1000ml
In wide-mouth reagent bottle, be separately added into 5%NaOH solution, processing the time be respectively 12h, for 24 hours, 48h, 72h, 90h, 110h time-division
It takes a small amount of alkali process liquid and it is centrifuged, then measuring Dissolve N and P concentration in supernatant is respectively 67.5mg/L
And 70.1mg/L, far below concentration of nitrogen and phosphorus in the present invention.The treatment fluid coloration of alkali is very heavy after handling 12h, and dark brown is presented,
And supernatant is close with raw sewage color in aeration stirring pond of the present invention.Contain a large amount of Na in alkali process+、OH-Ion causes
Clear liquid salinity is big, will increase subsequent processing effluent color dilution, salinity, is unfavorable for discharged wastewater met the national standard.
Operation of the present invention is simple and easy to do, does not introduce new chemical substance, with alkali process liquid phase ratio, sludge recovery of nitrogen and phosphorus rate
It is improved considerably, and eventually passes through anaerobic methane production recycling mass energy, the final discharge volume of sludge is made to reduce 70-90%, pole
The earth reduces specific resistance to filtration expense, realizes the theory of sewage treatment plant's clean manufacturing.
Embodiment two:
The residual active sludge of municipal sewage plant's secondary settling tank is passed through into centrifuge dehydration, moisture percentage in sewage sludge
78.1%, this sludge 300g are mixed with 1200mL secondary clarifier effluent in stirring aeration tank, are opened aerator and are adjusted tolerance 3L/L
Min opens agitating device and controls stirring rate 300rpm, and agitating mode is that pulse interval type, that is, every turn stops 5 seconds for 10 seconds.It is handling
Time be respectively 12h, for 24 hours, 48h, 72h, 90h, 110h when sampling analysis, measure supernatant in dissolved phosphorus nitrogen concentration, locating
Respectively 430.5mg/L and 122.4mg/L, SCOD 3901.2mg/L when managing time 12h, with the extension of processing time, 72h
When ammonia nitrogen concentration be 468.1mg/L, dissolved phosphorus concentration reaches 219.2mg/L, SCOD 6012.6mg/L.
After this is mixed liquid precipitate, water outlet is discharged into MAP precipitation reactor, adds 5%Na3PO4Solution and 17%MgCl2It is molten
Liquid makes P/Mg/N molar ratio 1/1.2/1, adjusts reacting solution pH value 8.95 with 5MNaOH, is stirred when adding medicament,
Agitating mode be 800rpm stir after five minutes, be reduced to 200rpm stir 15 minutes, stop stirring after precipitate 3h, ammonia in supernatant
The rate of recovery of nitrogen is 87.4%, and the rate of recovery of dissolved phosphorus is 94.1%,.To the precipitating Chinese patent of generation
201420458242.0 " devices that a kind of pair of phosphorus in waste water nitrogen carries out guanite resource utilization " separate and recover, and measure precipitating
Middle ammonium magnesium phosphate content is 94.5% or more.
Bed mud after above-mentioned stirring aeration and MAP supernatants after precipitation are mixed in anaerobism conditioning tank, mixed liquor pH value
8.29, then it is discharged into Anaerobic Sequencing Bath Reactor, inoculation anaerobic sludge starts reactor, what reactor was fed every time after running well
Solid-liquid ratio 1/3-1/5, COD removal rate 85-90% or more, methane high specific factor of created gase 1.18-1.38 L/(gVS).Anaerobism is anti-
Answer in device sludge finally using landfill disposal is carried out after mechanical dehydration, compared with initial residual activated sludge, VSS reduces 80-
90%, discharge volume reduces 70-90%.Specific resistance to filtration expense is greatly reduced, sewage treatment plant's clean manufacturing is realized
Theory.
Sludge alkaline hydrolysis processing comparison technique is carried out simultaneously, and each 800ml of secondary settling tank residual active sludge is taken to be distributed into 2000ml
In wide-mouth reagent bottle, be separately added into 5%NaOH solution, processing the time be respectively 12h, for 24 hours, 48h, 72h, 90h, 110h time-division
It takes a small amount of alkali process liquid and it is centrifuged, then measuring Dissolve N and P concentration in supernatant is respectively 72.5mg/L
And 68.2mg/L, far below concentration of nitrogen and phosphorus in the present invention.The treatment fluid coloration of alkali is very heavy after handling 12h, and dark brown is presented,
And supernatant is close with raw sewage color in aeration stirring pond of the present invention.Contain a large amount of Na in alkali process+、OH-Ion causes
Clear liquid salinity is big, will increase subsequent processing effluent color dilution, salinity, is unfavorable for discharged wastewater met the national standard.
Operation of the present invention is simple and easy to do, does not introduce new chemical substance, with alkali process liquid phase ratio, sludge recovery of nitrogen and phosphorus rate
It is improved considerably, and eventually passes through anaerobic methane production recycling mass energy, the final discharge volume of sludge is made to reduce 70-90%, pole
The earth reduces specific resistance to filtration expense, realizes the theory of sewage treatment plant's clean manufacturing.
Claims (7)
1. a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery, which is characterized in that this method comprises:
(1) moisture content for being squeezed sludge to sludge is 75-80%；
(2) by after squeezing sludge and water in 1g/3-5ml ratio re-mix impregnate 2h；
(3) above-mentioned mixed liquor is stirred and is aerated, natural subsidence is carried out to the mixed liquor after stirring aeration after 12-72h；
(4) supernatant in step (3) is discharged into MAP precipitation reactor by adding magnesium salt solution and microcosmic salt solution, adjusts P/
Mg/N molar ratio 1/1.2/1 adjusts reacting solution pH value 8.9 ± 0.1 with 5MNaOH, makes in supernatant under stirring conditions
MAP precipitation reaction occurs for nitrogen phosphorus, supernatants after precipitation is discharged into anaerobism conditioning tank, it is heavy that precipitating is discharged into separating and reclaiming device recycling
It forms sediment；
(5) the precipitating bed mud in the supernatant and step (3) after precipitating MAP in step (4) after natural subsidence is discharged into respectively to be detested
Oxygen conditioning tank is discharged into anaerobic reactor after mixed liquor pH value is adjusted to 7.9-8.5 using the alkali in precipitating bed mud by mixing,
Further fermentation methane phase recycles the energy.
2. a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery according to claim 1,
It is characterized in that, the mechanical equipment squeezed in step (1) to sludge is vacuum filter, plate and frame filter press, belt filter press
Or centrifuge.
3. a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery according to claim 1,
It is characterized in that, in step (3), stirring rate 150-400rpm, agitating mode is every turn and stops within 10 seconds 5 seconds, aeration quantity 3L/
min。
4. a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery according to claim 1,
It is characterized in that, in step (3), the concentration of ammonia nitrogen and dissolved phosphorus respectively reaches 420- in the supernatant after measuring natural subsidence
490mg/L and 120-210mg/L, SCOD are discharged into MAP precipitation reactor in 3500-6400mg/L, then by supernatant.
5. a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery according to claim 1,
It is characterized in that, in step (4), agitating mode is that 800rpm is stirred after five minutes, is reduced to 200rpm and stirs 15 minutes, stops stirring
2-3h is precipitated after mixing.
6. a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery according to claim 5,
It is characterized in that, the mass percent concentration of the magnesium salt solution is 17%, and the magnesium salt solution is MgCl2Solution, MgSO4Solution and
One of MgO solution；The mass percent concentration of the microcosmic salt solution is 5%, and the microcosmic salt solution is NaH2PO4Solution,
Na2HPO4Solution, Na3PO4Solution, KH2PO4Solution and K2HPO4One of solution.
7. a kind of clean preparation method for improving the residual active sludge energy resource rate of recovery according to claim 1,
Be characterized in that, in step (5), the anaerobic reactor be thoroughly mixed formula anaerobic reactor, up-flow anaerobic sludge blanket,
Anaerobic filter, anaerobic baffle reactor, anaerobic expanded granular sludge bed or Anaerobic Sequencing Bath Reactor.
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| EP3606878A1 (en) * | 2017-04-06 | 2020-02-12 | Universiteit Gent | Method for recovering n, k, and p from liquid waste stream |
| CN115677069B (en) * | 2021-07-23 | 2024-09-13 | 中国石油天然气股份有限公司 | Treatment method of excess sludge |
| CN113896389A (en) * | 2021-11-18 | 2022-01-07 | 江苏新天鸿集团有限公司 | Method for high-pressure homogeneous anaerobic digestion of high-solid-content sludge |
| CN114768162B (en) * | 2022-05-06 | 2023-05-26 | 山东同信智能科技有限公司 | Multiphase foam extinguishing agent based on excess sludge protein recovery technology and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1606533A (en) * | 2002-04-18 | 2005-04-13 | 株式会社荏原制作所 | Method of treating organic wastewater and sludge and treatment apparatus therefor |
| JP2007244995A (en) * | 2006-03-16 | 2007-09-27 | Unitika Ltd | Treatment equipment of digestion sludge |
| CN102229463A (en) * | 2011-05-18 | 2011-11-02 | 北京市环境保护科学研究院 | System and method for obtaining carbon source by utilizing ultrasonic enhanced sludge hydrolysis |
| CN103641283A (en) * | 2013-11-26 | 2014-03-19 | 华南理工大学 | Method of economically recycling phosphor from excess sludge |
| CN103693828A (en) * | 2013-12-20 | 2014-04-02 | 华南理工大学 | Method for processing residual sludge with integrated process of alkaline hydrolysis preprocessing, nitrogen and phosphorus recovery based on magnesium ammonium phosphate method and methane production based on anaerobic digestion |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1606533A (en) * | 2002-04-18 | 2005-04-13 | 株式会社荏原制作所 | Method of treating organic wastewater and sludge and treatment apparatus therefor |
| JP2007244995A (en) * | 2006-03-16 | 2007-09-27 | Unitika Ltd | Treatment equipment of digestion sludge |
| CN102229463A (en) * | 2011-05-18 | 2011-11-02 | 北京市环境保护科学研究院 | System and method for obtaining carbon source by utilizing ultrasonic enhanced sludge hydrolysis |
| CN103641283A (en) * | 2013-11-26 | 2014-03-19 | 华南理工大学 | Method of economically recycling phosphor from excess sludge |
| CN103693828A (en) * | 2013-12-20 | 2014-04-02 | 华南理工大学 | Method for processing residual sludge with integrated process of alkaline hydrolysis preprocessing, nitrogen and phosphorus recovery based on magnesium ammonium phosphate method and methane production based on anaerobic digestion |
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