Circulating system and method for improving biogas yield of biogas digester

Abstract

The invention discloses a circulating system for improving the biogas yield of a biogas digester. The circulating system comprises an original dung liquid pool, a backflushing pool, a feeding well, abiogas digester, a liquid outlet pipe well, a biogas taking well and a plurality of slag discharging wells. Film pressing ditches are disposed on both sides of the biogas digester, a filter unit is arranged between the original dung liquid pool and the backflushing pool, and an adding device is arranged between the backflushing pool and the feeding well. The invention also provides a circulating method for improving the biogas yield of the biogas digester. According to the invention, during use, slag and floating objects can be removed, the biogas digester does not need to be stopped for cleaning, the waste heat generated by biogas power generation can be used for keeping running in supercold weather, so that the system can achieve cycle running continuously all year round, animal dung ofbreeding plants can be continuously cleaned so as to solve the environmental problem brought about by animal dung, the fermented biogas residue can be used for making organic fertilizer, thus reachingcyclic utilization of animal dung, also the biogas yield is high, and biogas can be continuously provided for power generation.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a circulation system and a method for increasing the gas production of a biogas digester. Background technique [0002] With the continuous improvement of people's living standards, the demand for beef and mutton is also increasing. Coupled with the improvement of rural living conditions and the development of agricultural production mechanization, cattle and sheep have gradually withdrawn from family farming. The current cattle and sheep breeding is mainly some large-scale and specialized farms, but affected by many aspects, the production quantity of cattle and sheep in a short period of time cannot meet the domestic market demand, and the impact of animal manure treatment is particularly important. Due to the large-scale A large amount of excrement will be produced, which will not only increase the processing cost, but also cause adverse effects on the environment and affe...

AI Technical Summary

Problems solved by technology

[0004] This application provides a circulation system and method for improving the gas production of biogas digesters, which solves the problem that traditional biogas digesters need to frequently remove slag and change liquid in biogas digesters, which not only has high costs but also affects biogas power generation, and the liquid level of biogas digesters Due to the large number of floating objects, hard shells are often formed, which affects the gas outlet. In the colder north, the biogas digester is difficult to operate and the operating cost is high.

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