CN101830741B - Closed-type aerobic composting method for sludge - Google Patents
Closed-type aerobic composting method for sludge Download PDFInfo
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- CN101830741B CN101830741B CN2010101658655A CN201010165865A CN101830741B CN 101830741 B CN101830741 B CN 101830741B CN 2010101658655 A CN2010101658655 A CN 2010101658655A CN 201010165865 A CN201010165865 A CN 201010165865A CN 101830741 B CN101830741 B CN 101830741B
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- fermentation
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- mud
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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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
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Abstract
The invention belongs to the technical field of aerobic composting and in particular relates to a closed-type aerobic composting method for sludge. The method comprises the following steps of: adding a conditioner and a strain into the sludge and uniformly mixing, and performing aerobic fermentation on a fermentation windrow in a closed-type yard; dehydrating tail gas generated in the aerobic fermentation process; and collecting caloric-value gas in the tail gas and sending the collected caloric-value gas to the fermentation windrow. The method ensures the temperature of the closed yard, saves mass energy consumption, ensures the temperature stability of the yard environment, saves the fermenting time, and is favorable for full fermentation by composting in the closed-type yard and recycling the thermal tail gas; and the method realizes zero emission of the tail gas and has no pollution on the ambient atmosphere by recycling the thermal tail gas.
Description
Technical field:
The invention belongs to the aerobic compost technical field, be specifically related to a kind of method of mud closed-type aerobic composting.
Background technology:
Aerobic compost is under aerobic conditions, aerobic bacteria to refuse absorb, oxidation, decomposition, microorganism is by the vital movement of self, a part of absorbed oxidation operation is become simple inorganics, discharging simultaneously can be for the movable required energy of microorganism growth, another part organism is synthesized new tenuigenin, makes the continuous growth and breeding of microorganism, produces the process of more organism.In the Biochemical degraded, produce with amount of heat, if be not used, these heats can directly be drained along with tail gas, can cause a large amount of wastes.In addition, also can produce stink in composting process, these stinks can directly be discharged in air along with tail gas, the severe contamination ambient air.
Summary of the invention:
The purpose of this invention is to provide a kind of method that can utilize using waste heat from tail gas can realize simultaneously again the mud closed-type aerobic composting that air zero pollutes.
The object of the present invention is achieved like this:
A kind of method of mud closed-type aerobic composting, it comprises the following steps:
(1), add amendment and bacterial classification to mix in mud, the buttress of the fermentation bar in closed yard carries out aerobic fermentation;
(2), the tail gas that produces in the aerobic fermentation process is dewatered;
(3), the calorific value gas in tail gas is collected delivered to fermentation bar buttress.
The oxygen supply of described aerobic fermentation is to connect aeration tube bottom fermentation bar buttress, controls gas blower by the aeration tube oxygen supply by computer.
Calorific value gas in described tail gas is that the UTILIZATION OF VESIDUAL HEAT IN pipe of piling up neatly top by being arranged at the fermentation bar is collected, and described UTILIZATION OF VESIDUAL HEAT IN pipe communicates with described aeration tube.
Oxygen-supplying amount during described aerobic fermentation is 0.1～0.2m
3/ m
3.min.
PH value during described aerobic fermentation is 6.5-8.5.
During described aerobic fermentation moisture be 50～50%.
The every 3-7 of described fermentation bar buttress days turning once.
Described aerobic fermentation is divided into initial period, hot stage and maturation stage, and described initial period is the temperature rise period, and temperature is controlled at below 80 ℃; The temperature of described hot stage is 60-80 ℃; The temperature of described maturation stage is ambient temperature.
Beneficial effect of the present invention is: the method for this kind mud closed-type aerobic composting comprises the following steps successively: add amendment and bacterial classification to mix in mud, the fermentation bar buttress in closed yard carries out aerobic fermentation; The tail gas that produces in the aerobic fermentation process is dewatered; Calorific value gas in tail gas is collected delivered to fermentation bar buttress.The present invention adopts stockyard closed compost, adds the recycle of hot exhaust gas, has guaranteed the temperature in airtight stockyard, has saved a large amount of energy consumptions, and guarantees the temperature-stable of the environment in stockyard, has saved fermentation time, is conducive to fermentation finished thoroughly1; The recycle of hot exhaust gas of the present invention realized the zero release of tail gas, to ambient air without any pollution.
Embodiment:
The below is that the present invention is described further with embodiment, is not that practical range of the present invention is limited to this.
A kind of method of mud closed-type aerobic composting, it comprises the following steps:
(1), add amendment and bacterial classification to mix in mud, the buttress of the fermentation bar in closed yard carries out aerobic fermentation;
Mud can be paper mill sludge, can be also domestic sludge, can certainly be the mud of other type.Mud itself is not an extraordinary compost material, and degradation property is poor, and porosity is low, water ratio is high, must add a large amount of amendments and come loose mud, amendment commonly used has straw, wood chip, Pericarppium arachidis hypogaeae, rice bran etc., can certainly adopt other this areas to commonly use amendment.Bacterial classification adopts the BZT biological inoculum of U.S. Bi Wofeng, can certainly adopt this area other bacterial classification commonly used, does not give unnecessary details here.
(2), the tail gas that produces in the aerobic fermentation process is carried out processed, because in composting process, the water ratio of composting material is very large on the fermenting process impact, and the effect one of water is dissolved organic matter, participates in the metabolism of microorganism; Effect two is to regulate compost temperature, can by the evaporation of moisture, take away a part of heat when excess Temperature.The breeding of the too low obstruction of moisture microorganism makes decomposition rate slow, even causes decomposition reaction to stop.The too high raw material internal voids that can cause of moisture is full of by water, and air capacity is reduced, and causes to organism and supplies hypoxgia, forms anaerobic state.During aerobic fermentation of the present invention moisture be 50～50%.The present invention carries out recycle with tail gas, and is too high in order to prevent moisture, so will carry out processed, processed can adopt Calcium Chloride Powder Anhydrous, also can adopt polymer colloid, certainly also can adopt other dewatering type, and these are means of commonly using, do not give unnecessary details.
(3), the calorific value gas in tail gas is collected is delivered to fermentation bar buttress, recycle, but energy efficient, guarantee the stockyard temperature-stable, save fermentation time, realize the tail gas zero release, be conducive to air cleaner.
The oxygen supply of described aerobic fermentation is to connect aeration tube bottom fermentation bar buttress, controls gas blower by the aeration tube oxygen supply by computer.For aerobic compost, oxygen is the material conditions that microorganism depends on for existence, can cause a large amount of microbial deaths for hypoxgia, and decomposition rate is slowed down; But the excessive temperature that can make again of cooling air capacity reduces, and especially is unfavorable for the oxidation decomposition course of high temperature resistant bacterium, so oxygen-supplying amount will be suitably, and oxygen-supplying amount of the present invention is 0.1～0.2m
3/ m
3.min.
Wherein, the calorific value gas in described tail gas is that the UTILIZATION OF VESIDUAL HEAT IN pipe of piling up neatly top by being arranged at the fermentation bar is collected, and described UTILIZATION OF VESIDUAL HEAT IN pipe communicates with described aeration tube, circulates and UTILIZATION OF VESIDUAL HEAT IN by aeration tube.
PH value during described aerobic fermentation is 6.5-8.5, and under neutrality or slight alkalinity condition, bacterium and actinomycetes growth optimum are conducive to organic decomposition.
Described fermentation bar is piled up neatly every 3-7 days turning once, and to adjust its permeability, so that the oxygen demand of micropopulation in the heap body to be provided, the frequency of turning can be 3 days at the compost initial stage, and the later stage of compost can be 7 days, can certainly according to circumstances suitably adjust.
Described aerobic fermentation is divided into initial period, hot stage and maturation stage, described initial period is the temperature rise period, the carbohydrate of easily degrading in the bacterial degradation organism of non-refractory, fat etc. are emitted simultaneously heat and are made temperature increase, and temperature is controlled at below 80 ℃; At described hot stage, high temperature resistant bacterium breeds rapidly, under aerobic conditions, most of protein than difficult degradation, fiber etc. continue oxidized decomposition, emit simultaneously a large amount of heat energy, temperature rises, and temperature is controlled at 60-80 ℃, can kill pathogenic bacteria and parasitic ovum and can not suppress again the speed of microorganism decomposing organic matter.When organism has been degraded substantially, thermophile bacteria is nutriment and stopping growing for want of, and heat production stops thereupon, and the temperature of compost descends gradually, and at 40 ℃, it is stable that compost reaches substantially when temperature-stable, forms humus.
The temperature of described maturation stage is ambient temperature, and namely cooled compost, still have some new microorganisms to grow by remaining organism (comprising the residual body of bacterium after death), and composting process is finally completed.
The above is only better embodiment of the present invention, therefore all equivalences of doing according to the described structure of patent claim of the present invention, feature and principle change or modify, is included in patent claim of the present invention.
Claims (7)
1. the method for a mud closed-type aerobic composting, it is characterized in that: it comprises the following steps:
(1), add amendment and bacterial classification to mix in mud, the fermentation bar buttress in closed yard carries out aerobic fermentation,
Wherein, amendment has straw, wood chip, Pericarppium arachidis hypogaeae, rice bran; Bacterial classification is the BZT biological inoculum of U.S. Bi Wofeng;
PH value during aerobic fermentation is 6.5-8.5;
(2), the tail gas that produces in the aerobic fermentation process is dewatered;
(3), the calorific value gas in tail gas is collected delivered to fermentation bar buttress.
2. the method for a kind of mud closed-type aerobic composting according to claim 1 is characterized in that: the oxygen supply of described aerobic fermentation is to connect aeration tube in fermentation bar buttress bottom, controls gas blower by the aeration tube oxygen supply by computer.
3. the method for a kind of mud closed-type aerobic composting according to claim 2 is characterized in that: the calorific value gas in described tail gas is to collect by the UTILIZATION OF VESIDUAL HEAT IN pipe that is arranged at fermentation bar buttress top, and described UTILIZATION OF VESIDUAL HEAT IN pipe communicates with described aeration tube.
4. the method for a kind of mud closed-type aerobic composting according to claim 1, it is characterized in that: the oxygen-supplying amount during described aerobic fermentation is 0.1 ~ 0.2m
3/ m
3.min.
5. the method for a kind of mud closed-type aerobic composting according to claim 1, it is characterized in that: the moisture during described aerobic fermentation is 50%.
6. the method for a kind of mud closed-type aerobic composting according to claim 1 is characterized in that: the every 3-7 of described fermentation bar buttress days turning once.
7. the method for a kind of mud closed-type aerobic composting according to claim 1, it is characterized in that: described aerobic fermentation is divided into initial period, hot stage and maturation stage, and described initial period is the temperature rise period, and temperature is controlled at below 80 ℃; The temperature of described hot stage is 60-80 ℃; The temperature of described maturation stage is ambient temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101658655A CN101830741B (en) | 2010-04-30 | 2010-04-30 | Closed-type aerobic composting method for sludge |
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| CN2010101658655A CN101830741B (en) | 2010-04-30 | 2010-04-30 | Closed-type aerobic composting method for sludge |
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| CN101830741A CN101830741A (en) | 2010-09-15 |
| CN101830741B true CN101830741B (en) | 2013-11-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104446718A (en) * | 2014-12-03 | 2015-03-25 | 青岛市环境卫生科研所 | Pretreatment method of sludge composting feed |
| CN108862982A (en) * | 2017-12-13 | 2018-11-23 | 中山市和智电子科技有限公司 | A kind of zero tail gas compost reaction system having both sludge dewatering |
| CN113751464B (en) * | 2021-08-27 | 2023-04-21 | 田园牧歌生态环境科技(江苏)有限公司 | Solid waste organic matter processing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337381A (en) * | 2001-09-20 | 2002-02-27 | 郭高友 | Technological process of producing high-quality organic fertilizer with domestic garbage |
| CN1762863A (en) * | 2004-10-20 | 2006-04-26 | 吴为中 | Sludge drying and resource disposal process |
| CN101486613A (en) * | 2009-02-18 | 2009-07-22 | 沃邦（江苏）生态肥业有限公司 | Method for preparing organic fertilizer by mixed fermentation of water hyacinth and dewatered sludge |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337381A (en) * | 2001-09-20 | 2002-02-27 | 郭高友 | Technological process of producing high-quality organic fertilizer with domestic garbage |
| CN1762863A (en) * | 2004-10-20 | 2006-04-26 | 吴为中 | Sludge drying and resource disposal process |
| CN101486613A (en) * | 2009-02-18 | 2009-07-22 | 沃邦（江苏）生态肥业有限公司 | Method for preparing organic fertilizer by mixed fermentation of water hyacinth and dewatered sludge |
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| CN101830741A (en) | 2010-09-15 |
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