CN104557172A - Kitchen garbage and sludge co-treatment method based on mesophilic and thermophilic anaerobic co-digestion - Google Patents
Kitchen garbage and sludge co-treatment method based on mesophilic and thermophilic anaerobic co-digestion Download PDFInfo
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- CN104557172A CN104557172A CN201410787679.3A CN201410787679A CN104557172A CN 104557172 A CN104557172 A CN 104557172A CN 201410787679 A CN201410787679 A CN 201410787679A CN 104557172 A CN104557172 A CN 104557172A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention relates to the technical field of domestic garbage and discloses a kitchen garbage and sludge co-treatment method based on mesophilic and thermophilic anaerobic co-digestion. The method comprises the following steps: crushing kitchen garbage; mixing the kitchen garbage with dewatered sludge; conducting hydrolytic acidification treatment; conducting mesophilic anaerobic digestion; and conducting ozonation treatment; conducting thermophilic anaerobic digestion; and conducting dewatering treatment to prepare dewatered liquid and dewatered sludge cake, wherein conveying the dewatered liquid is conveyed to a liquid storage tank, and the dewatered sludge cake is used as organic fertilizer. According to the method, a mixture of kitchen garbage and sludge is treated by a mesophilic anaerobic digestion, ozonation and thermophilic anaerobic digestion combined technique, the treatment time is relatively short, the equipment investment is relatively low, and the yield of methane is high. After mesophilic anaerobic digestion, ozonation is added with the purposes of improving biodegradability and then improving the effect and gas yield of follow-up thermophilic anaerobic digestion, while ozonation treatment is basically added before anaerobic digestion in the conventional like technique.
Description
Technical field
The present invention relates to technical field of domestic garbage treatment, particularly relate to a kind of based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method.
Background technology
Changing food waste is the organic waste that a kind of generation is huge, needs are dealt carefully with, and along with the development of China's urbanization and the raising of living standards of the people, the generation of China's city rubbish from cooking increases year by year.To at present, China's domestic waste year generation, more than 1.6 hundred million tons, is wherein rubbish from cooking close to half.Increasing changing food waste has become one of Urban Garbage Treatment in China and has born greatly.
To inevitably produce a large amount of mud in sewage or waste water treating processes, for urban wastewater treatment firm, the sewage of often process 10,000 tons about produces the dewatered sludge of 8 tons.And current China urban wastewater treatment scale has broken through 1.5 hundred million tons/day, estimated with this, current China only the dewatered sludge that produces every year of urban wastewater treatment firm more than 40,000,000 tons.Except urban wastewater treatment firm, the industries such as papermaking, food-processing, petrochemical complex, printing and dyeing all produce a large amount of industrial sludges.
The process disposal of current China to changing food waste and mud depends on the technological approaches such as landfill, burning and compost.Landfill not only takies a large amount of soil, and easily causes the pollution of water, air and edatope, and increasing developed country starts to forbid adopting this method of disposal.Burning have thorough reduction, can the advantage such as partially recycled energy, but a large amount of obnoxious flavour will be produced in burning process, and effective process of these gases needs a large amount of facility to drop into and fund input, therefore this technology is faced with " running cost is high and public's acceptability is poor " two for a long time and challenges greatly.Composting can realize the recycling to nutrients resource in changing food waste and mud, but also input pollutent along with in soil, the objective reality such as consider that current China soil pollution situation is quite severe, changing food waste and mud generation increase increasingly, this mode will be subject to more strict control.
Organic waste anaerobic digestion utilizes the effect of microorganism to be the biogas that can be used as fuel by the organic matter transformation in waste, the pathogenic bacterium that simultaneously can become extinct preferably in waste, current this technology obtains application in animal waste, the process of mud the like waste, but this technology current (as processing efficiency, biogas yield etc.) in process optimization (as process combination, technological temperature etc.) and processing performance still has larger room for promotion.
Summary of the invention
The present invention is directed to existing in shortcoming, disclose a kind of based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals.
Based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, comprise the following steps,
A. the rubbish from cooking of collection is carried out break process, and then be delivered in mixing section;
B. be that the dewatered sludge of 80-90% is transported in the mixing section in steps A by water ratio, the volume adding dewatered sludge be the 0.5-2 of rubbish from cooking volume in mixing section doubly;
Reinject after water and stir, obtain slurried mixture, the injection rate of water is to guarantee that mixture water ratio is for 90-95%;
C. mixture is transported to hydrolysis acidification pool, acidication process 1-3 days;
D. the mixture of acidication process is pumped into mesophilic anaerobic digestion tank and carry out fermentative processing, in mesophilic anaerobic digestion tank, slurry temperature controls as 32-38 DEG C, and fermentation time controls as 10-15 days;
E. carry out ozone Oxidation Treatment to the material that step D exports, ozone intake is 0.05-0.2gO
3/ gTS, the treatment time is 60-100 minute;
F. the material after ozone Oxidation Treatment is pumped into thermophilic digestion tank to ferment further, in digester, the temperature of material controls as 52-58 DEG C, process 5-10 days;
G. the material through step F process carries out processed, obtained dehydration liquid and dehydrated sludge cake, and dehydration liquid is transported to liquid storage tank, and dehydrated sludge cake is used as fertilizer.
As preferably, steps A, is delivered to crushing chamber by the rubbish from cooking of collection and carries out break process, and then be delivered in mixing section.
As preferably, step G, the mass transport through step F process carries out processed to mechanical dehydration device.
As preferably, step H, uses the dehydration liquid circulation in liquid storage tank in the mixing section in step B.
As preferably, step H, is used as liquid fertilizer by the dehydration liquid in liquid storage tank.
As preferably, step H, is used as liquid fertilizer by the mixing section neutralization that the dehydration liquid circulation in liquid storage tank is used in step B.
Compared with prior art, beneficial effect of the present invention is:
(1) the present invention's key distinction compared with existing anaerobic digestion techniques is, the present invention adopts mesophilic anaerobic digestion and the mixture of thermophilic digestion combination technique to rubbish from cooking, mud to process, treatment time is relatively short, facility drops into and relatively economizes, and biogas yield is higher simultaneously.
(2) gentle high temperature combined anaerobic digestion process in the present invention's employing: namely the organism of easily degraded in material is converted into biogas by first mesophilic anaerobic digestion, and then is transformed by the organism compared with difficult degradation in material by thermophilic digestion.The benefit done like this is: under the prerequisite of identical treatment effect, relative to only adopting for mesophilic anaerobic digestion, can reduce the treatment time; Relative to only adopting for thermophilic digestion, because thermophilic digestion needs higher temperature to carry out hot digestion tank, process energy consumption can be reduced.
(3) after middle temperature, thermophilic digestion, ozonize is added, object improves biodegradability, and then improve effect and the factor of created gase of subsequent high temperature anaerobic digestion, and existing process similarity is added ozonize before anaerobic digestion substantially, if carried out ozonize before anaerobic digestion, the amount of process is just large, and expense is just high.Comparatively speaking, after mesophilic anaerobic digestion process, carrying out ozonize again, the amount of process is with regard to much less, and expense is also taken many.
(4) in rubbish from cooking, appropriate mud is mixed, the productive rate of gentle thermophilic digestion biogas and quality in not only can improving, can also improve the agronomy value of digestion solid product (i.e. natural pond slag) and liquid product (i.e. natural pond liquid).
(5) by connecting thermophilic digestion process after mesophilic anaerobic digestion process, the extinction effect to pathogenic bacterium can be improved further.
Accompanying drawing explanation
Fig. 1 is schema of the present invention.
Embodiment
Embodiment 1
Based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, as shown in Figure 1, comprise the following steps,
A. the rubbish from cooking of collection is carried out break process, and then be delivered in mixing section;
B. by water ratio be 80% dewatered sludge be transported in the mixing section in steps A, the volume adding dewatered sludge is 0.5 times of rubbish from cooking volume in mixing section;
Reinject after water and stir, obtain slurried mixture, the injection rate of water is to guarantee that mixture water ratio is for 90%;
C. mixture is transported to hydrolysis acidification pool, acidication process 1 day;
D. the mixture of acidication process is pumped into mesophilic anaerobic digestion tank and carry out fermentative processing, in mesophilic anaerobic digestion tank, slurry temperature controls is 32 DEG C, and it is 10 days that fermentation time controls;
E. carry out ozone Oxidation Treatment to the material that step D exports, ozone intake is 0.05gO
3/ gTS, the treatment time is 60 minutes;
F. the material after ozone Oxidation Treatment is pumped into thermophilic digestion tank to ferment further, in digester, the temperature of material controls to be 52 DEG C, processes 5 days;
G. the material through step F process carries out processed, obtained dehydration liquid and dehydrated sludge cake, and dehydration liquid is transported to liquid storage tank, and dehydrated sludge cake is used as fertilizer.
Embodiment 2
Based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, as shown in Figure 1, comprise the following steps,
A. the rubbish from cooking of collection is carried out break process, and then be delivered in mixing section;
B. by water ratio be 90% dewatered sludge be transported in the mixing section in steps A, the volume adding dewatered sludge is 2 times of rubbish from cooking volume in mixing section;
Reinject after water and stir, obtain slurried mixture, the injection rate of water is to guarantee that mixture water ratio is for 95%;
C. mixture is transported to hydrolysis acidification pool, acidication process 3 days;
D. the mixture of acidication process is pumped into mesophilic anaerobic digestion tank and carry out fermentative processing, in mesophilic anaerobic digestion tank, slurry temperature controls is 38 DEG C, and it is 15 days that fermentation time controls;
E. carry out ozone Oxidation Treatment to the material that step D exports, ozone intake is 0.2gO
3/ gTS, the treatment time is 100 minutes;
F. the material after ozone Oxidation Treatment is pumped into thermophilic digestion tank to ferment further, in digester, the temperature of material controls to be 58 DEG C, processes 10 days;
G. the material through step F process carries out processed, obtained dehydration liquid and dehydrated sludge cake, and dehydration liquid is transported to liquid storage tank, and dehydrated sludge cake is used as fertilizer.
H. the dehydration liquid circulation in liquid storage tank is used in the mixing section in step B.
Embodiment 3
Based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, as shown in Figure 1, comprise the following steps,
A. the rubbish from cooking of collection is delivered to crushing chamber and carries out break process, and then be delivered in mixing section;
B. be that the dewatered sludge of 80-90% is transported in the mixing section in steps A by water ratio, the volume adding dewatered sludge be the 0.5-2 of rubbish from cooking volume in mixing section doubly;
Reinject after water and stir, obtain slurried mixture, the injection rate of water is to guarantee that mixture water ratio is for 90-95%;
C. mixture is transported to hydrolysis acidification pool, acidication process 1-3 days;
D. the mixture of acidication process is pumped into mesophilic anaerobic digestion tank and carry out fermentative processing, in mesophilic anaerobic digestion tank, slurry temperature controls as 32-38 DEG C, and fermentation time controls as 10-15 days;
E. carry out ozone Oxidation Treatment to the material that step D exports, ozone intake is 0.05-0.2gO
3/ gTS, the treatment time is 60-100 minute;
F. the material after ozone Oxidation Treatment is pumped into thermophilic digestion tank to ferment further, in digester, the temperature of material controls as 52-58 DEG C, process 5-10 days;
G. the mass transport through step F process carries out processed to mechanical dehydration device, obtained dehydration liquid and dehydrated sludge cake, and dehydration liquid is transported to liquid storage tank, and dehydrated sludge cake is used as fertilizer;
H. the dehydration liquid in liquid storage tank is used as liquid fertilizer.
Embodiment 4
Based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, as shown in Figure 1, comprise the following steps,
A. the rubbish from cooking of collection is carried out break process, and then be delivered in mixing section;
B. by water ratio be 89% dewatered sludge be transported in the mixing section in steps A, the volume adding dewatered sludge is 1 times of rubbish from cooking volume in mixing section;
Reinject after water and stir, obtain slurried mixture, the injection rate of water is to guarantee that mixture water ratio is for 95%;
C. mixture is transported to hydrolysis acidification pool, acidication process 2 days;
D. the mixture of acidication process is pumped into mesophilic anaerobic digestion tank and carry out fermentative processing, in mesophilic anaerobic digestion tank, slurry temperature controls is 35 DEG C, and it is 12 days that fermentation time controls;
E. carry out ozone Oxidation Treatment to the material that step D exports, ozone intake is 0.1gO
3/ gTS, the treatment time is 80 minutes;
F. the material after ozone Oxidation Treatment is pumped into thermophilic digestion tank to ferment further, in digester, the temperature of material controls to be 55 DEG C, processes 8 days;
G. the material through step F process carries out processed, obtained dehydration liquid and dehydrated sludge cake, and dehydration liquid is transported to liquid storage tank, and dehydrated sludge cake is used as fertilizer.
H. the mixing section neutralization that the dehydration liquid circulation in liquid storage tank is used in step B is used as liquid fertilizer.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (6)
1. based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, it is characterized in that: comprise the following steps,
A. the rubbish from cooking of collection is carried out break process, and then be delivered in mixing section;
B. be that the dewatered sludge of 80-90% is transported in the mixing section in steps A by water ratio, the volume adding dewatered sludge be the 0.5-2 of rubbish from cooking volume in mixing section doubly;
Reinject after water and stir, obtain slurried mixture, the injection rate of water is to guarantee that mixture water ratio is for 90-95%;
C. mixture is transported to hydrolysis acidification pool, acidication process 1-3 days;
D. the mixture of acidication process is pumped into mesophilic anaerobic digestion tank and carry out fermentative processing, in mesophilic anaerobic digestion tank, slurry temperature controls as 32-38 DEG C, and fermentation time controls as 10-15 days;
E. carry out ozone Oxidation Treatment to the material that step D exports, ozone intake is 0.05-0.2gO3/gTS, and the treatment time is 60-100 minute;
F. the material after ozone Oxidation Treatment is pumped into thermophilic digestion tank to ferment further, in digester, the temperature of material controls as 52-58 DEG C, process 5-10 days;
G. the material through step F process carries out processed, obtained dehydration liquid and dehydrated sludge cake, and dehydration liquid is transported to liquid storage tank, and dehydrated sludge cake is used as fertilizer.
2. according to claim 1 based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, it is characterized in that: steps A, the rubbish from cooking of collection be delivered to crushing chamber and carry out break process, and then be delivered in mixing section.
3. according to claim 1 based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, it is characterized in that: step G, the mass transport through step F process carries out processed to mechanical dehydration device.
4. according to claim 1 based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, it is characterized in that: step H, the dehydration liquid circulation in liquid storage tank used in the mixing section in step B.
5. according to claim 1 based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, it is characterized in that: step H, the dehydration liquid in liquid storage tank be used as liquid fertilizer.
6. according to claim 1 based in the rubbish from cooking of high temperature combined anaerobic digestion and mud co-treatment method, it is characterized in that: step H, the mixing section neutralization that the dehydration liquid circulation in liquid storage tank is used in step B be used as liquid fertilizer.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105396862A (en) * | 2015-11-09 | 2016-03-16 | 天津市裕川环境科技有限公司 | Energy regeneration method for solid organic waste alkaline thermal hydrolysis supernate |
| CN105503335A (en) * | 2015-12-17 | 2016-04-20 | 东莞市环境科学研究所 | Method and device for producing high organic carbon fertilizer through kitchen waste |
| CN105642648A (en) * | 2015-12-23 | 2016-06-08 | 清华大学 | System and method for continuously treating kitchen waste |
| CN106964633A (en) * | 2017-04-14 | 2017-07-21 | 镇江市海润环保科技有限公司 | A kind of kitchen castoff and sewage plant sludge cooperative processing method |
| CN107879583A (en) * | 2017-12-23 | 2018-04-06 | 北京达源环保科技有限公司 | Sludge pyrohydrolysis and anaerobic digestion integrated treatment process system |
| CN110835219A (en) * | 2019-11-28 | 2020-02-25 | 天津凯英科技发展股份有限公司 | Synergistic method and application for anaerobic digestion of municipal sludge |
| CN111410306A (en) * | 2020-04-09 | 2020-07-14 | 江苏理文造纸有限公司 | Treatment method for recycling biochemical sludge |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105396862A (en) * | 2015-11-09 | 2016-03-16 | 天津市裕川环境科技有限公司 | Energy regeneration method for solid organic waste alkaline thermal hydrolysis supernate |
| CN105503335A (en) * | 2015-12-17 | 2016-04-20 | 东莞市环境科学研究所 | Method and device for producing high organic carbon fertilizer through kitchen waste |
| CN105642648A (en) * | 2015-12-23 | 2016-06-08 | 清华大学 | System and method for continuously treating kitchen waste |
| CN106964633A (en) * | 2017-04-14 | 2017-07-21 | 镇江市海润环保科技有限公司 | A kind of kitchen castoff and sewage plant sludge cooperative processing method |
| CN107879583A (en) * | 2017-12-23 | 2018-04-06 | 北京达源环保科技有限公司 | Sludge pyrohydrolysis and anaerobic digestion integrated treatment process system |
| CN110835219A (en) * | 2019-11-28 | 2020-02-25 | 天津凯英科技发展股份有限公司 | Synergistic method and application for anaerobic digestion of municipal sludge |
| CN111410306A (en) * | 2020-04-09 | 2020-07-14 | 江苏理文造纸有限公司 | Treatment method for recycling biochemical sludge |
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