Two-stage microbiological treatment method for swine wastewater containing antibiotics

Abstract

The invention discloses a two-stage microbiological treatment method for swine wastewater containing antibiotics, which is characterized by comprising the following steps: 1, filling anaerobic sludge in an anaerobic fermentation tank, settling the antibiotic-containing pig raising wastewater in a settling tank, and introducing the settled antibiotic-containing pig raising wastewater into the anaerobic fermentation tank; 2, domesticating the anaerobic sludge in the anaerobic fermentation tank; 3, entering a stable anaerobic fermentation stage after the domestication stage is completed, and removing nitrogen, phosphorus, COD and antibiotic pollutants in the wastewater; combusting biogas generated in the anaerobic fermentation process for heat supply or purified for grid connection; using CO2-containing gas obtained by biogas purification and combustion as a microalgae growth carbon source; 4, after stable anaerobic fermentation is completed, discharging fermented biogas slurry in the anaerobic fermentation tank into a buffer pool and then introducing into the microalgae photobioreactor to be subjected to microalgae culture treatment; and 5, after microalgae culture treatment is completed, microalgae are collected, and dischaging treated wastewater. The method can be widely applied to the fields of cultivation, environmental protection and the like.

Description

technical field [0001] The invention relates to the treatment of pig-raising wastewater, in particular to a two-stage microbial treatment method for pig-raising wastewater containing antibiotics. Background technique [0002] As one of the largest agricultural countries, China's livestock and poultry breeding scale continues to increase, while producing a large amount of livestock and poultry manure. According to the "China Statistical Yearbook", the annual output of pig breeding in my country from 2011 to 2018 reached 600 million to 700 million heads. Although the scale of pig farming in my country has declined slightly in recent years, the scale of pig farming is still huge. At the same time, the excrement discharge is about 3.8 billion tons. If the excrement is not properly treated and discharged randomly, it will cause air, water and soil pollution. [0003] The annual output of antibiotics in my country is about 210,000 tons, of which 97,000 tons are used in animal husb...

AI Technical Summary

Problems solved by technology

According to the "China Statistical Yearbook", the annual output of pig breeding in my country from 2011 to 2018 reached 600 million to 700 million heads. Although the scale of pig farming in my country has declined slightly in recent years, the scale of pig farming is still huge. More than 500 million heads, and about 3.8 billion tons of feces are discharged at the same time. If these feces are not properly treated and discharged randomly, they will cause air, water and soil pollution

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