CN101062822A - Two-section type combined anaerobic digestion process - Google Patents

Two-section type combined anaerobic digestion process Download PDF

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Publication number
CN101062822A
CN101062822A CNA2007100114888A CN200710011488A CN101062822A CN 101062822 A CN101062822 A CN 101062822A CN A2007100114888 A CNA2007100114888 A CN A2007100114888A CN 200710011488 A CN200710011488 A CN 200710011488A CN 101062822 A CN101062822 A CN 101062822A
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CN
China
Prior art keywords
digestion
digestive
anaerobic digestion
type combined
concentration
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Application number
CNA2007100114888A
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Chinese (zh)
Inventor
冯磊
李润东
蓝宁阁
骆晓松
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沈阳航空工业学院
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Application filed by 沈阳航空工业学院 filed Critical 沈阳航空工业学院
Priority to CNA2007100114888A priority Critical patent/CN101062822A/en
Publication of CN101062822A publication Critical patent/CN101062822A/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/40Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Abstract

The invention discloses a new craft to treat organic waste material, which is characterized by the following: adopting two section type united dry digest craft; choosing above two organic waste material; proceeding digestive treatment; increasing the density of the organic waste material; shorting the residence time; increasing efficiency of gas production; proceeding mechanical dehydration for the organic waste material of undigested completely; realizing innocent compost treatment under the function of additive (straw); fitting for now principal of resources of wastes and innocent treatment.

Description

Two-section type combined anaerobic digestion process
Technical field: natural pond technology is produced in the digestion that the present invention relates to a kind of rubbish, refuse, and especially a kind of two-section type combined anaerobic digestion process belongs to the energy and environment field.
Background technology: external at present a lot of mechanisms have carried out the research in domestic refuse, mud and feces of livestock and poultry combined anaerobic digestion product natural pond.In the tradition organic waste anaerobic digestion process, the substrate load becomes influence digestion important factor, and the too high fermented liquid pH value that causes of substrate load lowers, and the growth of restriction methanogen influences gas producing efficiency.Tradition associating digestion techniques or dried digestion techniques all focus on the research biogas production characteristics, and seldom study gas producing efficiency and economic benefit, and digestion techniques is put into practice because of longer duration is difficult in the engineering.Domestic Hunan University adopts the associating digestion techniques to handle to sewage sludge and organic garbage of city, parameters such as carbon-nitrogen ratio, temperature and water ratio change and optimised process in the primary study associating digestive process, the disadvantage that associating digestion equally has with other digestion techniques is that digestion time is long, problems such as gas producing efficiency is low, though adopting, someone does digestion, improve organic concentration and gas producing efficiency, but dried digestion techniques processing biological organic garbage is united in no one's employing.
Summary of the invention:, the invention provides a kind of two-section type combined anaerobic digestion process at above-mentioned the deficiencies in the prior art.
For achieving the above object, the technical solution used in the present invention is: two-section type combined anaerobic digestion process, and concrete steps are as follows:
A, utilization associating digestion, the substrate that carbon content is higher and the substrate of high nitrogen mix.
B, unite and do digestion: mixture is mixed with Digestive system with 5% lower concentration earlier, carries out anaerobic digestion, add the hybrid reaction material then gradually, increase Digestive system concentration to 8-12%, regulate the pH value, stablize Digestive system, continuously feeding, high yield gas dose-effect fruit is guaranteed in discharging continuously.
C, mechanical dehydration is carried out in discharging, the material water ratio of dehydration back organic waste is about 60-80%.
D, digestion product aerobic compost: the digestion product behind the mechanical dehydration is mixed according to parameters such as water ratio, organic carbon and porositys with additive, mixture is carried out compost treatment, regulate ventilation, guarantee that compost realizes innoxious purpose, satisfy the farmland and use standard.
Beneficial effect: traditional organic waste digestion techniques is confined to single material, lower concentration, exists the long shortcoming of digestion time, therefore lacks the feasibility of economic benefit and engineering practice.This technology is on the basis of traditional technology, adopt two-section type combined dried digestion process, according to the composition of material, select two or more organic waste to carry out digestion process, improve organic waste concentration simultaneously, shorten the residence time, improve gas producing efficiency, simultaneously to not digesting organic waste mechanical dehydration completely, under additive (stalk) effect, realize innoxious compost treatment, this new technology meets the principle of current changing waste into resources and harmless treatment very much.
Description of drawings:
Fig. 1 is a technological process block diagram of the present invention.
Embodiment:
A, utilization associating digestion, the substrate that carbon content is higher and the substrate of high nitrogen mix, and can set up a kind of optimum complementation at storeroom, the toxic action that can also slow down ammonia nitrogen simultaneously.
B, unite and do digestion: after mixture was cut into 1-2cm, the lower concentration with 5% was mixed with Digestive system.Under 37 ℃, in the full automatic solid digester, carry out anaerobic digestion, add the hybrid reaction material gradually after stable, increase Digestive system concentration to 8-12%, adding unslaked lime after the acidifying regulates more than the pH value to 7.0, stablize Digestive system, improve charging and discharging frequency (2-3 days once) gradually, guarantee high yield gas dose-effect fruit.
C, will collect digestion product and adopt centrifugal separation method to carry out mechanical dehydration, the material water ratio of dehydration back organic waste is about 60-80%.
D, the digestion product behind the mechanical dehydration is added additive (stalk, cow dung etc.) satisfy the composting process condition: water ratio: 40-60%; C/N:25: 1-30: 1; PH value: 5.5-8.5 etc. carry out static forced ventilation compost treatment to mixture, and air flow is 0.05-0.2m 3/ min.m 2, guarantee that compost realizes innoxious purpose, satisfy the farmland and use standard.
Embodiment
Based on the substrate of stalk, mix with excrement of animals.Because the carbon-nitrogen ratio in the stalk is higher, and the nitrogen content in the excrement of animals is than higher, both mixed carry out the effect that anaerobic digestion then can be played mutual supplement with each other's advantages.
A) dried digestion process
After stalk cut into 1-2cm, behind excrement of animals thorough mixing such as cow dung, the lower concentration with 5% (other are water) was mixed with Digestive system.Under 37 ℃, in full automatic solid digester (4 * 30L solid-state fermentation tank), carry out anaerobic digestion, add the hybrid reaction material gradually after stable, increase Digestive system concentration to 12%, adding unslaked lime after the acidifying regulates more than the pH value to 7.0, stablize Digestive system, improve charging and discharging frequency (2-3 days once) gradually, guarantee high yield gas dose-effect fruit.
B) digestion product mechanical dehydration technology
To collect digestion product and adopt centrifugal separation method to carry out mechanical dehydration, the material water ratio of dehydration back organic waste is about 60-80%.
C) digestion product aerobic composting process
Digestion product behind the mechanical dehydration is added additive (stalk, cow dung etc.) satisfy the composting process condition: water ratio: 40-60%; C/N:25: 1-30: 1; PH value: 5.5-8.5 etc. carry out static forced ventilation compost treatment to mixture, and air flow is 0.05-0.2m 3/ min.m 2, guarantee that compost realizes innoxious purpose, satisfy the farmland and use standard.
Equipment used is specially:
1) full automatic solid digester model: 4 * 30L solid-state fermentation tank
Production unit: Shanghai Baoxing Biology Equipment Engineering Co., Ltd.
2) mechanical centrifuge dehydration unit type: sludge Dewatering Centrifuge
Production unit: whizzer factory of machinery company limited of Jinhua Huahai.
3) aerobic composting device model: TG-407
Production unit: Shanghai is with wide science and education Instr Ltd..

Claims (4)

1, two-section type combined anaerobic digestion process is characterized in that, concrete steps are as follows:
A, utilization associating digestion, the substrate that carbon content is higher and the substrate of high nitrogen mix;
B, unite and do digestion: mixture is mixed with Digestive system with 5% lower concentration earlier, carries out anaerobic digestion, add the hybrid reaction material then gradually, increase Digestive system concentration to 8-12%, regulate the pH value, stablize Digestive system, continuously feeding, high yield gas dose-effect fruit is guaranteed in discharging continuously;
C, mechanical dehydration is carried out in discharging, the material water ratio of dehydration back organic waste is about 60-80%;
D, digestion product aerobic compost: the digestion product behind the mechanical dehydration is mixed according to parameters such as water ratio, organic carbon and porositys with additive, mixture is carried out compost treatment, regulate ventilation, guarantee that compost realizes innoxious purpose, satisfy the farmland and use standard.
2, two-section type combined anaerobic digestion process as claimed in claim 1 is characterized in that, the higher substrate of carbon content can be a stalk, and the substrate of high nitrogen can be an ight soil.
3, two-section type combined anaerobic digestion process as claimed in claim 1, it is characterized in that, the dried digestion process of b combination of steps is specific as follows: after mixture is cut into 1-2cm, lower concentration with 5% is mixed with Digestive system, under 37 ℃, in the full automatic solid digester, carry out anaerobic digestion, add the hybrid reaction material gradually after stable, increase Digestive system concentration to 8-12%, adding unslaked lime after the acidifying regulates more than the pH value to 7.0, stablize Digestive system, improve charging and discharging frequency (2-3 days once) gradually, guarantee high yield gas dose-effect fruit.
4, two-section type combined anaerobic digestion process as claimed in claim 1 is characterized in that, in the d step, additive is stalk, cow dung; The composting process condition is: water ratio: 40-60%; C/N:25: 1-30: 1; PH value: 5.5-8.5; Air flow is 0.05-0.2m 3/ min.m 2
CNA2007100114888A 2007-05-29 2007-05-29 Two-section type combined anaerobic digestion process CN101062822A (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007100114888A CN101062822A (en) 2007-05-29 2007-05-29 Two-section type combined anaerobic digestion process

Publications (1)

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CN101062822A true CN101062822A (en) 2007-10-31

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104355707A (en) * 2014-10-16 2015-02-18 农业部南京农业机械化研究所 Dry and wet combined digestion treatment method for livestock manure and straw
CN104973744A (en) * 2014-04-14 2015-10-14 大冶市三禾生物环保肥料有限公司 Bio-organic fertilizer preparation through extraction of biogas with slurry and then fermentation
CN105837268A (en) * 2016-03-22 2016-08-10 安徽工程大学 Preparation method of plant culture medium
CN106187458A (en) * 2016-07-07 2016-12-07 全椒县夏军养猪专业合作社 Swine manure and stalk fermentation compost method
CN106242216A (en) * 2016-08-12 2016-12-21 同济大学 A kind of method utilizing cattle manure quickly to start mud superhigh temperature anaerobic digester system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104973744A (en) * 2014-04-14 2015-10-14 大冶市三禾生物环保肥料有限公司 Bio-organic fertilizer preparation through extraction of biogas with slurry and then fermentation
CN104355707A (en) * 2014-10-16 2015-02-18 农业部南京农业机械化研究所 Dry and wet combined digestion treatment method for livestock manure and straw
CN106220262B (en) * 2014-10-16 2019-08-02 农业部南京农业机械化研究所 A kind of method of digestion process fowl and animal excrement and stalk
CN104355707B (en) * 2014-10-16 2016-08-31 农业部南京农业机械化研究所 Dry and wet simultaneous digestion processes the method for fowl and animal excrement and straw
CN106220262A (en) * 2014-10-16 2016-12-14 农业部南京农业机械化研究所 A kind of digestion process fowl and animal excrement and the method for straw
CN105837268A (en) * 2016-03-22 2016-08-10 安徽工程大学 Preparation method of plant culture medium
CN106187458A (en) * 2016-07-07 2016-12-07 全椒县夏军养猪专业合作社 Swine manure and stalk fermentation compost method
CN106242216A (en) * 2016-08-12 2016-12-21 同济大学 A kind of method utilizing cattle manure quickly to start mud superhigh temperature anaerobic digester system
CN106242216B (en) * 2016-08-12 2019-03-01 同济大学 A method of utilizing cow dung quick start sludge superhigh temperature anaerobic digester system

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Open date: 20071031