Method for rapidly and stably recycling biogas slurry

Abstract

The invention discloses a method for rapidly and stably recycling biogas slurry, and belongs to the technical field of biological energy recycling. According to the method, the oxidation effect of a catalyst and an oxidizing agent is utilized to improve the content of soluble components in the biogas slurry, organic macromolecules are converted into hydrophilic micromolecules which are easily utilized by plants, the resource utilization rate is improved, the plant toxicity of the biogas slurry is reduced, the stabilizing time is shortened, and greenhouse gas emission and non-point source pollution caused by returning the biogas slurry to the field in the stabilizing process are reduced. The plant toxicity of the biogas slurry is rapidly reduced, the content of soluble components and small molecule components in the biogas slurry is increased, and the purpose of rapidly and stably recycling the biogas slurry is achieved. The DOC of the treated biogas slurry is increased by 10%-20%, the seed germination index of the biogas slurry is increased by 140%-190%, the soluble organic nitrogen is increased by 15%-50%, and the bacteriostasis rate reaches 99.99% or above. The emission of ammonia nitrogen is reduced by 5%-10%, the nitrate nitrogen is increased by 0.1%-7%, and great harm to the surrounding ecological environment is reduced.

Description

technical field [0001] The invention belongs to the technical field of bioenergy resource utilization, in particular to a method for rapidly and stably resource utilization of biogas slurry Background technique [0002] In recent years, with the rapid development of the market economy, the rapid development of my country's intensive and large-scale livestock and poultry breeding industry has led to a surge in the production of biogas slurry. At present, the annual output of livestock and poultry manure in my country exceeds 2.5 billion tons, which is 2.7 times that of industrial waste. The environmental pollution of livestock and poultry breeding has become one of the important environmental problems in our country. [0003] When various breeding enterprises process livestock and poultry manure, a large amount of biogas slurry is produced through different processes such as solid-liquid separation, hydrolysis acidification, and anaerobic fermentation. The biogas slurry is ri...

AI Technical Summary

Problems solved by technology

[0003] When various breeding enterprises process livestock and poultry manure, a large amount of biogas slurry is produced through different processes such as solid-liquid separation, hydrolysis acidification, and anaerobic fermentation. The biogas slurry is rich in nutrients such as nitrogen, phosphorus, and organic matter, and is an ideal resource. However, for the sake of application safety, the biogas slurry needs to be stabilized for 3-12 months to reduce phytotoxicity and inhibit bacterial activity before it can be used for returning to the field, and during the long-term stabilization process, the soluble components in the biogas slurry Part of it is converted into gas, causing greenhouse gas emissions, and part of it is converted into nitrate nitrogen, causing non-point source pollution after returning to the field. At the same time, it also loses a lot of organic resources and reduces resource utilization.

In recent years, with the rapid development of the aquaculture industry and technological changes, the biogas slurry produced has increased, and the long stabilization time has limited the utilization of resources in the field, resulting in the biogas slurry in most farms exceeding the storage limit, causing serious damage to the surrounding ecological environment. big hazard

[0004] At present, the stabilization of biogas slurry is mainly natural biological method, which lacks conditional control, so the stabilization time is affected by external influences such as ambient temperature, pool volume, pool depth, etc. It is difficult to control the stabilization efficiency, and it usually takes 3-12 months to stabilize. Can be returned to the field

[0005] Aiming at problems such as inconsistent stabilization time, uncontrollable stabilization efficiency, too long stabilization time, and loss of organic matter resources during the stabilization process, the present invention proposes a method for rapid and stable resource utilization of biogas slurry based on catalysts and oxidants, shortening the stabilization time of biogas slurry, It has a great effect on improving the utilization rate of biogas slurry resources, and the stability process of this method is controllable, and is less affected by natural climate conditions