A biogas slurry treatment system and method

Abstract

Embodiments of the invention provide a biogas slurry treatment system and method and relate to the field of sewage treatment. The system includes an electrolysis treatment unit, an artificial wetland treatment unit and a backflow unit. Heavy metal ions in biogas slurry are removed at an electrolysis pool cathode plate (2) in the electrolysis treatment unit through flocculation. The biogas slurry treated by the electrolysis treatment unit is fed into the artificial wetland treatment unit, nitrate nitrogen in the biogas slurry is converted into nitrogen and removed through denitrification in an anaerobic zone (6), and a microbial battery is formed when the artificial wetland treatment unit works and supplies the electrolysis treatment unit with power. According to the system and the method, heavy metals in the biogas slurry are removed through biogas slurry treatment by the electrolysis treatment unit, the removing efficiency of total nitrogen in the biogas slurry is increased through biogas slurry treatment by the artificial wetland treatment unit, and the artificial wetland treatment unit supplies the electrolysis treatment unit with power, thus reducing the running cost.

Description

technical field [0001] The embodiments of the present invention relate to the field of sewage treatment, and more specifically, to a biogas slurry treatment system and method. Background technique [0002] With the gradual improvement of the modern animal husbandry industry system and the rapid development of the economy, the production mode of animal husbandry has undergone major changes, gradually changing from decentralized and extensive to large-scale and intensive operations, and the discharge of livestock and poultry manure has increased sharply. And the resulting environmental problems are becoming more and more prominent. Biogas production by anaerobic fermentation has received widespread attention and rapid development around the world in recent years because of its dual functions of controlling livestock and poultry manure environmental pollution and alleviating the pressure of increasing rural energy demand. Since the 1870s, my country has vigorously developed an...

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Problems solved by technology

[0007] Aiming at the problems of high operating cost of the treatment system, low removal efficiency of total nitrogen in the biogas slurry and incomplete removal of heavy metals in the biogas slurry when using the existing technology for biogas slurry treatment, the embodiment of the present invention provides a method to overcome the above problems or Biogas slurry treatment system and method that at least partially solve the above problems

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