A strain of Paleobacterium intermedia b522 and its application

Abstract

The invention discloses a strain of Ochrobactrum intermedium B522 that synergistically degrades COD and ammonia nitrogen in livestock and poultry breeding sewage and its application. The bacterium has been preserved in the General Microbiology Center of China Microbiological Culture Collection Management Committee on April 29, 2019 , referred to as CGMCC, the address is No. 3, Yard 1, Beichen West Road, Chaoyang District, Beijing, and the deposit number is CGMCC No.17652. The strain has a wide range of suitable growth temperatures, and can proliferate well between 20-45°C (OD 600 >1.0). Its optimum growth pH is between 6.0‑8.5 (OD 600 >1.0). The aquaculture wastewater collected from actual pig farms in the laboratory had initial COD, ammonia nitrogen, and total phosphorus contents of 7600 mg / L, 204 mg / L, and 19.75 mg / L, respectively. After 3 days of aerobic treatment with strain B522, the experimental results showed that the The bacteria achieved a large number of proliferation in the first 24 hours, and the proliferation speed of the bacteria slowed down within 24-72 hours until reaching the maximum concentration of bacteria. In this process, the COD degradation rate in the aquaculture wastewater was 66%, the ammonia nitrogen degradation rate was 84%, and the total phosphorus removal rate was 40%. Therefore, the strain has a good degradation effect on COD, ammonia nitrogen and total phosphorus, so it has great potential in the microbial treatment of livestock and poultry wastewater, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of microorganisms, in particular to the technical field of microbial wastewater treatment. Background technique [0002] In recent years, with the continuous adjustment of my country's agricultural industrial structure, the scale and intensification of the livestock and poultry breeding industry have continued to increase. On the one hand, large-scale breeding can greatly shorten the growth cycle of livestock and poultry, increase production, and reduce costs. On the other hand, due to the large-scale accumulation of pollutants, the difficulty of treatment increases, so the environmental pollution is not to be underestimated. watch for. Livestock wastewater has high concentration of suspended solids, COD cr High content, BOD 5 High organic phosphorus content, high ammonia nitrogen content, difficult to transport, and difficult to degrade. In addition, livestock and poultry wastewater contains a large numb...

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Problems solved by technology

On the one hand, large-scale breeding can greatly shorten the growth cycle of livestock and poultry, increase production, and reduce costs. On the other hand, due to the large-scale accumulation of pollutants, the difficulty of treatment increases, so the environmental pollution is not to be underestimated. watch for

Livestock wastewater has high concentration of suspended solids, COD cr High content, BOD 5 High organic phosphorus content, high ammonia nitrogen content, difficult to transport, and difficult to degrade. In addition, livestock and poultry wastewater contains a large number of pathogenic microorganisms, parasite eggs, and residual heavy metal elements and antibiotics. The air, water, and soil environment cause serious harm, destroy the natural ecological balance, and pose a great threat to human and animal health

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