Anaerobic membrane bioreactor for treating livestock and poultry wastewater containing high-concentration roxarsone

Abstract

The invention discloses an anaerobic membrane bioreactor for treating livestock and poultry wastewater containing high-concentration roxarsone, and belongs to the technical field of sewage treatment.The anaerobic membrane bioreactor is characterized in that simulated livestock and poultry wastewater containing low-concentration roxarsone to high-concentration roxarsone is gradually used for domesticating the reactor, anaerobic flora resistant to roxarsone is screened and cultivated, and the anaerobic flora resistant to roxarsone is obtained; under the condition of high-concentration roxarsone, stable and efficient removal of COD and rapid conversion of roxarsone are realized, and meanwhile, methane-rich biogas can be generated for recycling. The reactor disclosed by the invention can stably run for a long time, and solves the problems of poor effluent quality, serious sludge loss, low roxarsone conversion efficiency and the like when the livestock and poultry wastewater containing high-concentration roxarsone is treated by an existing anaerobic biological treatment method.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an anaerobic membrane bioreactor (AnMBR) for treating livestock and poultry wastewater containing high-concentration roxarsone. Background technique [0002] Roxarsone compounds are widely used in agriculture and livestock breeding, such as additives, herbicides, pesticides, organic fertilizers, soil disinfectants, etc., and become an important source of arsenic pollution in the environment. Although roxarsone compounds themselves have low toxicity, they can be metabolized into more toxic inorganic arsenic (such as arsenite) in the environment, resulting in serious arsenic pollution in local areas and posing a huge potential threat to human health. . Roxarsone compounds usually have high water solubility, so their residues in livestock and poultry wastewater are more serious. Pollution control of roxarsone in livestock and poultry wastewater has received increasing atte...

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Problems solved by technology

[0005] In order to solve the problems of poor effluent quality, serious sludge loss, and low conversion efficiency of roxarsone when the existing anaerobic biological treatment method is used to treat livestock wastewater containing high concentration of roxarsone, the present invention provides a method for treating high-concentration roxarsone. The Anaerobic Membrane Bioreactor (AnMBR) for livestock and poultry wastewater with a high concentration of roxarsone is designed to enable the initial conversion of roxarsone in the wastewater, while ensuring the stability of the effluent water quality and biogas output of the reactor

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