Recovery system suitable for livestock manure compost volatilized ammonia nitrogen and process thereof

Abstract

The invention discloses a recovery system suitable for livestock manure compost volatilized ammonia nitrogen and a process thereof. The system is composed of a compost fermentation bin, gas conveying pipelines, a centrifugal fan and an ammonia absorption bin. Specifically, the ammonia absorption bin includes a gas distribution system, a cushion material and an absorbing material. In a livestock manure composting process, the centrifugal fan is employed to pump all the ammonia in the compost fermentation bin out and send the ammonia into the ammonia absorption bin, after even distribution by the gas distribution system, the ammonia upward enters the cushion material layer and the absorbing material layer in order, the ammonia is adsorbed by the absorbing material in the contact process of the ammonia and the absorbing material and is digested and utilized as microbial nutrients on the material, thus realizing recovery of nitrogen in the ammonia. The system utilizes the centrifugal fan to convey the ammonia to the absorbing material bottom reasonably, and employs the gas distribution system to distribute the gas evenly and then recover the ammonia, thus greatly improving the recovery efficiency. At the same time, the system has a simple structure, makes full use of agricultural resources, and has the advantages of low cost, high efficiency, and no secondary pollution, etc.

Description

technical field [0001] The invention belongs to the field of agricultural waste treatment and resource utilization, and relates to a recovery system and process suitable for ammonia nitrogen volatilized by livestock and poultry manure composting. Background technique [0002] The rapid development of large-scale livestock and poultry farming has led to a sharp increase in the discharge of livestock and poultry manure, and the resulting environmental problems have become increasingly prominent. Composting is one of the most commonly used methods to realize the harmlessness and resource utilization of livestock and poultry manure, but there is a serious loss of nitrogen in composting. The main way of compost nitrogen loss is ammonia volatilization, which not only pollutes the environment and endangers human health, but also reduces the nutrient content of compost products. Studies have shown that the ammonia nitrogen lost by ammonia volatilization accounts for more than 19% o...

AI Technical Summary

Problems solved by technology

Existing methods of using compost additives (CN101565333) can only partially reduce the volatilization of ammonia, while chemical recovery methods (such as CN101481270, CN101486603 and CN201678599U, etc.) mostly have problems such as high cost, complicated operation, and possible secondary pollution.

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