Anaerobic fermentation feeding method capable of realizing aeration dense and dilute excrement sewage automatic separation

Abstract

The invention relates to an anaerobic fermentation feeding method capable of realizing aeration dense and dilute excrement sewage automatic separation. The method is concretely characterized in that aPLC (programmable logic controller) uses a turbidity transducer for monitoring the turbidity change in the excrement sewage precipitation process; the precipitation final point is automatically judged; the dense and dilute boundary between supernate and dense sewage is determined; then, the PLC respectively pumps the supernate and the dense sewage through controlling a first feeding pump and a second feeding pump; in the pumping process, the PLC monitors the liquid level height in an aeration pool through a liquid level transmitter; the height is compared with the height of the determined dense and dilute boundary, so that the excessive pumping is prevented; the goal of excrement sewage automatic separation and feeding is realized. The real-time automatic monitoring on the turbidity and the liquid level is introduced; the automatic judgement of dense and dilute excrement sewage separation is realized, so that the problem that relatively dilute sewage enters an anaerobic fermentation tank since the dense and dilute boundary judgement is performed by depending on experience is effectively avoided; the stability of the anaerobic fermentation environment is guaranteed; the marsh gas yield is improved.

Description

technical field [0001] The invention relates to the technical field of anaerobic biogas fermentation, in particular to an anaerobic fermentation feeding method for automatic separation of thick and thin manure with aeration. Background technique [0002] Biogas projects that use breeding manure as raw materials generally pass the culture manure into an anaerobic fermentation tank, and undergo mesophilic fermentation under the action of anaerobic microbial metabolism to remove most of the organic matter and obtain a large amount of biogas. Based on the above characteristics of eliminating organic pollution and generating clean secondary energy, biogas projects have been widely promoted and applied. [0003] However, due to the characteristics of livestock and poultry breeding, in order to ensure the cleanliness of the breeding environment, the pens will be washed with water regularly, and a large amount of flushing wastewater will be generated. At the same time, due to the p...

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Problems solved by technology

[0007] The invention provides an anaerobic fermentation feeding method for automatic separation of thick and thin manure with aeration, and aims to provide a method for automatically separating thick and thin manure from livestock and poultry to solve the problem of manual monitoring of feeding. The problem of inaccurate judgment of the feed end point that appears

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