Marsh gas production technology using kitchen residue, straw, stock and fowl dejecta and active mud as material

A technology of livestock and poultry manure and activated sludge, which is applied in the fields of biological sludge treatment, waste fuel, energy and wastewater treatment, etc., and achieves the effects of high value, low operating cost and environmental cost, and high equipment efficiency

Inactive Publication Date: 2006-05-10
JIANGNAN UNIV
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Problems solved by technology

Using straw and kitchen waste as raw materials, there is no complete and systematic research on the large-scale production of biogas with high solids for the energy supply of small

Method used

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  • Marsh gas production technology using kitchen residue, straw, stock and fowl dejecta and active mud as material
  • Marsh gas production technology using kitchen residue, straw, stock and fowl dejecta and active mud as material

Examples

Experimental program
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Embodiment Construction

[0026] (1) Design two parallel high solids biogas reactors (2-400m 3 ), using the anaerobic digestion sludge of urban domestic sewage treatment plants as seed sludge, mixing raw food waste, straw, livestock and poultry manure, activated sludge and seed sludge in the reactor, kitchen waste, straw, livestock and poultry manure The mass ratio of activated sludge and activated sludge is 1:1:1:1, and the amount of seed sludge is 25% of the raw material. The northern region adopts anaerobic fermentation at medium temperature 33-37°C, and the southern region adopts medium-high temperature anaerobic fermentation at 33-55°C For fermentation, the pH value is maintained at 7.0, the humidity is controlled at 90%-100%, and the organic acids and CH in organic matter are detected every day. 4 and CO 2 content, when CH in the generated biogas 4 The content is stable at 50%-70%, CO 2 When the content is 30%-50%, the reactor reaches the normal operation state.

[0027] During normal operati...

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Abstract

The invention discloses a technique for producing methane with kitchen residue, straw fecal and active sludge as raw material, and relates to the key technique of methane production and a high solid methane fermentation reactor. It is characterized in: rigid anaerobic environment, adequate and good inoculum, necessary fermentation temperature, proper acid-base scale, proper fermentation concentration and carbon-hydrogen ration; the breeding speed safeguard of zymogeneous bacteria in fermentate; the killing of toxic and harmful bacterium; and the high solid reactor of stable operation. The invention is characterized in that it has significant academic meaning and practical meaning for producing methane with low investment, high stability and clean production.

Description

technical field [0001] Biogas production technology that uses organic waste such as kitchen waste, straw, livestock and poultry manure, and activated sludge as fermentation raw materials, involving key technologies for biogas production and high-solids biogas fermentation reactor technology. Background technique [0002] How to produce biogas safely, economically and stably has always been a worldwide problem. Straw is considered as an important raw material for biogas fermentation. In order to solve the technical problems of straw fermentation, the state has arranged a series of research topics on the application of basic and applied technologies. The main goals are: whether straw can produce gas, how much biogas can be produced, how to use straw and manure together, and how to pretreat , Straw discharge method and discharge machine research and so on. The "four-in-one" high-efficiency planting and breeding development model developed in northern my country, that is, sola...

Claims

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Application Information

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IPC IPC(8): C02F11/04
CPCY02E50/30Y02W10/37
Inventor 阮文权孙志浩王庭
Owner JIANGNAN UNIV
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