CN101962204A - Low energy consumption method for producing fertilizer by sludge granulation-biological drying - Google Patents
Low energy consumption method for producing fertilizer by sludge granulation-biological drying Download PDFInfo
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- CN101962204A CN101962204A CN2010102884386A CN201010288438A CN101962204A CN 101962204 A CN101962204 A CN 101962204A CN 2010102884386 A CN2010102884386 A CN 2010102884386A CN 201010288438 A CN201010288438 A CN 201010288438A CN 101962204 A CN101962204 A CN 101962204A
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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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- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
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Abstract
The invention relates to a low energy consumption method for producing a fertilizer by sludge granulation-biological drying, which comprises the following steps: firstly adopting a sludge mixing machine, carrying out mixing granulation on 100 parts of dewatered sludge and 30-50 parts of biologically dried sludge, and producing sludge particles with the initial water content of 55-65% and the particle size of 10-20mm; conveying to a material distribution machine through a material conveying device, and uniformly distributing the sludge particles in a biological drying chamber; then carrying out ventilation on a compost body, and leading the materials to carry out the biological drying reaction, wherein the ventilation quantity is 0.05-0.10m3/(m3.min); carrying out biological temperature-raising reaction on the materials for 4-8d, and reducing the water content to below 35%; and finally mixing the sludge after the biological drying with an inorganic fertilizer, deploying nutrition, then carrying out granulation drying and producing an organic-inorganic compound fertilizer. Wood chips, straws and other exogenous auxiliary materials are added at the initial stage of start, and the sludge after the biological drying is adopted as the auxiliary material during the operation, thereby reducing the dependence on exogenous additives. The biological drying is carried out after producing the fermented materials into the particles, thereby leading the structure of the materials to be loose, being conductive to the ventilation and the biochemical reactions, leading the biochemical reaction time to be less than 1/3 of the fermentation time of the compost, leading the production quantity of odor to be small and having low running cost and very obvious economic benefits.
Description
Technical field
The present invention is a kind of granular sludge-biological dewatered making fertilizer method of less energy-consumption, belongs to technical field of sludge treatment in the environmental protection field.
Background technology
In recent years, along with the raising of quickening of urbanization process and people's living standard, urban wastewater discharge constantly increases, and sewage work's quantity constantly increases, and the output of sludge of sewage treatment plants also increases thereupon fast.According to Eleventh Five-Year Plan, by 2010, China's treatment rate of domestic sewage was not less than 70%, and sewage treatment capacity will reach 1 * 10
8m
3/ d, the output of city dewatered sludge will surpass 1 * 10
6T/d.Municipal sewage sludge water ratio height, perishable, foul smelling, and contain objectionable impuritiess such as parasite, pathogenic micro-organism and heavy metal, be not good at as processing, will become new source of pollution, all that has been achieved is spoiled in the sewage disposal that people are carried out painstakingly.
At present, the main mode of sludge treatment is landfill, burning, heat drying, compost and building materials production both at home and abroad.In a lot of developed countries, the mud landfill is forbidden by law that the main mode of its processing shifts with resource utilization gradually and is utilized as target signature.Compost fermentation method wherein has the advantage of stabilization, innoxious and resource utilization, but needs nearly 30 days treatment time, causes floor space big, and processing efficiency is lower.In addition, dewatered sludge water ratio height, C/N is lower, and the densification of structure thickness is airtight, directly carries out compost fermentation treatment effect extreme difference.
Summary of the invention
For overcoming the technical problem of above existence, the present invention aims to provide a kind of granular sludge-biological dewatered making fertilizer method of less energy-consumption, by biological dewatered with carrying out after mud and the granules of accessoriesization, effectively improve the oxygen supply situation of heap body material, shortened becoming thoroughly decomposed the time of mud class organic matter greatly; Outside initial start stage adds source additive, when normally runing, adopt biological dewatered back mud as auxiliary material, reduced the dependence of external source additive; Mud after biological dewatered is made innoxious organic-inorganic compound mixed fertilizer, realize the resource utilization of mud.
Granular sludge-biological dewatered making fertilizer the method for a kind of less energy-consumption that the present invention proposes, concrete steps are as follows:
(1) mud granulizing
Adopt the mud mixing machine, the auxiliary material of 100 parts dewatered sludges and 30 ~ 50 parts is carried out mixing granulation in proportion, be made into the initial aqueous rate and be 60 ~ 65% mud granule;
(2) biological dewatered heap body makes up
Step (1) gained mud granule is delivered to material distributing machine by e Foerderanlage, and uniform distribution forms biological dewatered heap body in biological dewatered storehouse;
(3) ventilation is biological dewatered
The biological dewatered heap body of step (2) gained is ventilated from bottom to top from bank body bottom, carry out biological respinse, the biological dewatered heap body of step (2) gained is ventilated from bottom to top from bank body bottom, carry out biological respinse;
(4) mud after biological dewatered is mixed with inorganic fertilizer, carry out the granulation oven dry after the allotment nutrition, make organic-inorganic compound mixed fertilizer.
Among the present invention, the volume ratio that stalk or wood chip and dewatered sludge are pressed 1:1 adds, and when normally runing, adopts biological dewatered back mud, adds 30 ~ 50 parts biological dewatered back mud in 100 parts the dewatered sludge, and the particle diameter of mud granule is 10 ~ 20mm.
Among the present invention, in biological dewatered storehouse, three of warehouses are brick wall body to the employing material distributing machine with the mud granule uniform distribution in the step (2), and the bottom is furnished with the ventilation groove; The bank height that forms is 1.0 ~ 2.0m.
Among the present invention, in the biological respinse, drying time is 4 ~ 8 days described in the step (3), and ventilation is 0.05 ~ 0.10 m
3/ (m
3Min).
The effect that the present invention is useful:
1. among the present invention dewatered sludge and biological dewatered sludge carried out carrying out behind the mixing granulation biological dewatered, heap body voidage can reach 20 ~ 30%, effectively improved the oxygen supply situation of fermentation heap body, mud class organic matter just can be stablized in 4 ~ 8d, biological dewatered speed of reaction is improved, drying time shortens greatly, not as good as 1/3 of the compost fermentation time.
2. the mud after biological dewatered is made innoxious full nutritional compound fertilizer, can solve the high and possible secondary pollution problems of cost in the conventional sludge disposal process, can solve the inorganic fertilizer hypotrophy again, cause problems such as soil compaction, alkalization, nutritional trouble and farm crop variation, realized sewage sludge harmlessness, disposal of resources.
3. among the present invention,, when normal operation, then be auxiliary material with the biological dewatered sludge except that the technology initial start stage adopts stalk, wood chip etc. as the auxiliary material.Biological dewatered back mud is as auxiliary material, and its structure is fluffy, water-retaining capacity is strong, contains a large amount of microorganisms simultaneously, is good raising agent, moisture adjuster and Inoculant, and it is simple and easy to, and is in liberal supply.With its auxiliary material as the sludge organism mummification, can effectively shorten the compost cycle, reduce the generation of foul smell, reduce the dependence of external source additive, 1 ton of mud can be saved 1 ton the outer source additive of wood chip.
Description of drawings
Fig. 1 is the granular sludge-biological dewatered making fertilizer method process flow diagram of the less energy-consumption among the present invention.
Embodiment
Further specify the present invention below by embodiment.
Embodiment 1
Table 1 somewhere sewage work dewatered sludge property analysis
| Material | pH | Water ratio (%) | VS(%, butt) | C/N |
| Mud | 6.5~7 | 76~84 | 45~50 | 8~10 |
| Wood chip | 7~7.5 | 15~20 | 98.9~99.5 | 250~300 |
Adopt a kind of granular sludge-biological dewatered making fertilizer method of less energy-consumption to handle the dewatered sludge of this factory, concrete process flow sheet please see Figure 1, concrete steps are as follows: (1) prepares first feed back: adopt the mud mixing machine earlier, with dewatered sludge and wood chip by volume 1:1 carry out mixing granulation, be made into the initial aqueous rate and be 60 ~ 65%, particle diameter 10 ~ 20mm mud granule; Be delivered to material distributing machine by e Foerderanlage then, in the biological fermentation storehouse, three of fermentation cabin are brick wall body with the mud granule uniform distribution, and the bottom is furnished with three road ventilation grooves, and the bank height is 1.0 ~ 2.0m; Then the heap body is ventilated, make material that biological dewatered reaction take place, ventilation is 0.05 ~ 0.10 m
3/ (m
3Min); After material carried out the biochemical temperature reaction of 6d, water ratio can be reduced to below 35%, promptly gets first feed back.The formal operation of (2) granular sludge-biological dewatered making fertilizer: adopt the mud mixing machine earlier, the biological dewatered back mud feed back of the above gained of 100 parts dewatered sludges and 30 ~ 50 parts is carried out mixing granulation, be made into the initial aqueous rate and be 55 ~ 65%, particle diameter 10 ~ 20mm mud granule; Be delivered to material distributing machine by e Foerderanlage then, in biological dewatered storehouse, three in biological dewatered storehouse is a brick wall body with the mud granule uniform distribution, and the bottom is furnished with the ventilation groove, and the bank height is 1.0 ~ 2.0m; Then the heap body is ventilated, make material that biological dewatered reaction take place, ventilation is 0.05 ~ 0.10 m
3/ (m
3Min); After material carried out the biochemical temperature reaction of 6d, material water ratio can be reduced to below 35%; At last the mud after biological dewatered is mixed with inorganic fertilizer, carry out the granulation oven dry after the allotment nutrition, make organic-inorganic compound mixed fertilizer.Dewatered sludge and above gained part biological mummification finished product (2) set by step carry out once more granulating-biological dewatered making fertilizer.This operation factory is provided with 6 biological dewatered storehouses altogether, stacks the biological dewatered material of 1 ~ 6d successively, has guaranteed the continuous operation of dewatered sludge granulating-biological dewatered making fertilizer technology.
Claims (4)
1. the granular sludge of a less energy-consumption-biological dewatered making fertilizer method is characterized in that this method may further comprise the steps:
(1) mud granulizing
Adopt the mud mixing machine, dewatered sludge and auxiliary material are carried out mixing granulation in proportion, be made into the initial aqueous rate and be 60 ~ 65% mud granule;
(2) biological dewatered heap body makes up
Step (1) gained mud granule is delivered to material distributing machine by e Foerderanlage, and uniform distribution forms biological dewatered heap body in biological dewatered storehouse;
(3) ventilation is biological dewatered
The biological dewatered heap body of step (2) gained is ventilated from bottom to top from bank body bottom, carry out biological respinse;
(4) mud after biological dewatered is mixed with inorganic fertilizer, carry out the granulation oven dry after the allotment nutrition, make organic-inorganic compound mixed fertilizer.
2. the granular sludge of a kind of less energy-consumption according to claim 1-biological dewatered making fertilizer method; it is characterized in that described auxiliary material adopts stalk or wood chip in the technology initial start stage; the volume ratio that stalk or wood chip and dewatered sludge are pressed 1:1 adds; during normal the operation; adopt biological dewatered back mud; add the biological dewatered back mud of 30-50 part in 100 parts the dewatered sludge, the particle diameter of mud granule is 10-20mm.
3. the granular sludge of a kind of less energy-consumption according to claim 1-biological dewatered making fertilizer method, it is characterized in that adopting in the step (2) material distributing machine with the mud granule uniform distribution in biological dewatered storehouse, three of warehouses are brick wall body, and the bottom is furnished with the ventilation groove; The bank height that forms is 1.0-2.0m.
4. the granular sludge of a kind of less energy-consumption according to claim 1-biological dewatered making fertilizer method is characterized in that described in the step (3) that in the biological respinse, drying time is 4-8 days, and ventilation is 0.05-0.10 m
3/ (m
3Min).
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531319A (en) * | 2011-12-13 | 2012-07-04 | 宜兴能达环保科技有限公司 | Organic water-containing material dewatering and drying method and device |
| CN102887616A (en) * | 2011-07-22 | 2013-01-23 | 中国科学院城市环境研究所 | Low strength continuous aeration quick biological drying method |
| CN103496834A (en) * | 2013-09-30 | 2014-01-08 | 河南金谷实业发展有限公司 | Dehydration method for reducing water content of sludge in microbial fermentation way |
| CN103864274A (en) * | 2014-03-18 | 2014-06-18 | 同济大学 | Biological drying treatment method for high-solid-content sludge obtained by anaerobic digestion |
| CN105000776A (en) * | 2015-07-03 | 2015-10-28 | 天津霍普环保科技有限公司 | Sludge deep-dewatering bio-drying integrated treatment method |
| CN106008106A (en) * | 2016-05-27 | 2016-10-12 | 兰州交通大学 | Sludge-based charcoal loessal soil conditioner and preparation method thereof |
| CN109503239A (en) * | 2018-12-29 | 2019-03-22 | 重庆渝水环保科技有限公司 | A kind of dewatered sludge prepares the method for organic fertilizer and the gardens compound fertilizer containing the organic fertilizer |
| GB2616335A (en) * | 2021-12-29 | 2023-09-06 | Jacobs Eng Group Inc | Methods for increasing biosolids cake dryness through a forced ventilation aerated static pile biological drying process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428955A (en) * | 2007-11-06 | 2009-05-13 | 宋乾武 | Mechanical deep dehydration, biological desiccation and reclamation combined treatment process for sewage sludge |
| CN101618977A (en) * | 2008-07-03 | 2010-01-06 | 城市污染控制国家工程研究中心 | High-temperature aerobic fermentation process for sludge with low energy consumption and no pollution |
-
2010
- 2010-09-21 CN CN2010102884386A patent/CN101962204A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428955A (en) * | 2007-11-06 | 2009-05-13 | 宋乾武 | Mechanical deep dehydration, biological desiccation and reclamation combined treatment process for sewage sludge |
| CN101618977A (en) * | 2008-07-03 | 2010-01-06 | 城市污染控制国家工程研究中心 | High-temperature aerobic fermentation process for sludge with low energy consumption and no pollution |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887616A (en) * | 2011-07-22 | 2013-01-23 | 中国科学院城市环境研究所 | Low strength continuous aeration quick biological drying method |
| CN102531319A (en) * | 2011-12-13 | 2012-07-04 | 宜兴能达环保科技有限公司 | Organic water-containing material dewatering and drying method and device |
| CN103496834A (en) * | 2013-09-30 | 2014-01-08 | 河南金谷实业发展有限公司 | Dehydration method for reducing water content of sludge in microbial fermentation way |
| CN103496834B (en) * | 2013-09-30 | 2015-09-09 | 河南金谷实业发展有限公司 | A kind of fermentable that utilizes is to reduce the dewatering of moisture percentage in sewage sludge |
| CN103864274A (en) * | 2014-03-18 | 2014-06-18 | 同济大学 | Biological drying treatment method for high-solid-content sludge obtained by anaerobic digestion |
| CN105000776A (en) * | 2015-07-03 | 2015-10-28 | 天津霍普环保科技有限公司 | Sludge deep-dewatering bio-drying integrated treatment method |
| CN106008106A (en) * | 2016-05-27 | 2016-10-12 | 兰州交通大学 | Sludge-based charcoal loessal soil conditioner and preparation method thereof |
| CN109503239A (en) * | 2018-12-29 | 2019-03-22 | 重庆渝水环保科技有限公司 | A kind of dewatered sludge prepares the method for organic fertilizer and the gardens compound fertilizer containing the organic fertilizer |
| GB2616335A (en) * | 2021-12-29 | 2023-09-06 | Jacobs Eng Group Inc | Methods for increasing biosolids cake dryness through a forced ventilation aerated static pile biological drying process |
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Application publication date: 20110202 |