The treatment and utilization of distillery wastewater has always been a major issue of environmental protection in distillery industry. The content of organic matter and suspended matter in wastewater is high, cod is generally 30000-60000mg / L, SS is 10000-20000mg / L. At present, it is usually to recycle feed and use traditional anaerobic fermentation process for treatment. The technology of anaerobic treatment of distillery wastewater has been applied in China since 1960s, and has been popularized in 1980s. This method has many advantages, such as being able to obtain a certain amount of energy, having a good treatment effect for high concentration distillery wastewater, and forming process technology.

There are some disadvantages in the treatment of distillery wastewater by anaerobic fermentation technology

1,Generally, the effluent treated by anaerobic fermentation process can not meet the discharge standard, and other processes such as aerobic process can be taken as supplementary treatment measures to meet the discharge standard.

2,The culture period of anaerobic fermentation sludge is long, and the requirements of the culture process are relatively harsh, and the operation and debugging time is long. Generally, it takes more than one year to operate normally.

3 ,The high content of suspended solids in distillery waste liquor is not easy to be separated, which affects the application of high efficiency anaerobic reactor.

Anaerobic fermentation technology in the treatment of distillery wastewater is becoming more and more perfect, which can basically meet the needs of distillery wastewater treatment. Common anaerobic fermentation technologies mainly include anaerobic contact process, UASB Process and two-phase anaerobic digestion process, etc