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Method for increasing organic load of anaerobic fermentation

An anaerobic fermentation and organic load technology, applied in the field of environmental engineering, can solve the problems of collapse of the methane production system, decline of methane production, and difficulty in recovering the activity of methanogens, so as to accelerate the methane production rate, improve the fermentation capacity, and shorten the digestion period. Effect

Inactive Publication Date: 2019-04-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0002] When the anaerobic fermentation system treats municipal organic solid waste, because of its high organic content, when the high-load operation, the methane production rate is lower than the hydrolysis and acidification rate, the system is prone to serious accumulation of organic acids, the Ph value is significantly reduced, and the methane production A series of acidosis phenomena such as a sharp drop
Once the impact load exceeds the buffer capacity of the system, the activity of methanogens will be difficult to recover, and the methane-producing system will face collapse
Therefore, the load shock restricts the processing capacity of the anaerobic fermentation system

Method used

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  • Method for increasing organic load of anaerobic fermentation

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Embodiment Construction

[0016] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0017] (1) The preparation method of biochar: put the sawdust into the crucible, compact it to reduce the pores between the sawdust, and put the solid waste such as the sawdust in an anoxic environment at 500°C, and control the temperature rise to 10-15°C / min After the temperature reaches 500°C, maintain it for 2 hours, sieve it after cooling down, and control the pore size between 0.25mm-1mm, and store it in a dry place for later use.

[0018] (2) Fermentation substrate and parameters of anaerobic seed sludge: The substrate used in this study is food waste and residual sludge. ), potatoes (20%), cabbage (20%), carrots (13.8%), pork (10%), chicken (2%), eggs (5%), oil (1%), salt (0.2%), The remaining sludge is taken from the dewatered sludge of the secondary settling tank of the sewage plant. The food waste and the remaining sludge are prepared...

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Abstract

The invention discloses a method for increasing organic load of anaerobic fermentation. In a digestive system of which the organic load is gradually increased, charcoal is quantitatively added to an anaerobic digestion system, the addition quantity of a fermentation substrate is gradually increased, and the load is increased. Experiment proves that along with the increment of the load of the anaerobic fermentation, the charcoal has obvious promotion effect on anaerobic fermentation. In a high-load anaerobic system, the charcoal can increase the methane generation rate, the digestion period canbe obviously shortened, the fermentability of the system is effectively improved, system rancidity is avoided, and the method has certain directive function on the engineering application.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, in particular to a method for increasing the organic load of anaerobic fermentation. Background technique [0002] When the anaerobic fermentation system treats municipal organic solid waste, because of its high organic content, the methane production rate is lower than the hydrolysis and acidification rate during high-load operation, the system is prone to serious accumulation of organic acids, the Ph value is significantly reduced, and the methane production A series of acidosis phenomena such as a sharp drop. Once the impact load exceeds the buffer capacity of the system, the activity of methanogens will be difficult to recover, and the methane-producing system will face collapse. Therefore, the load shock restricts the processing capacity of the anaerobic fermentation system. How to increase the organic load of anaerobic fermentation to enhance the efficiency of the anaero...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 李倩宇文超岁杨晓欢龚凯王高骏高新陈荣刘子恒
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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