The current standard is developed for the purpose of implementing the Law of the People's Republic of China on the Prevention and Control of Water Pollution, protecting and controlling water pollution and standardizing the application of internal circulation aerobic biological fluidized bed in wastewater treatment projects. The current standard specifies the technical requirements for technological design, main equipment, test and control and operational management of internal circulation aerobic biological fluidized bed for wastewater treatment. The current standard is released for the first time in China. 

 Technical specifications of internal circulation aerobic biological fluidized bed for wastewater treatment(HJ2021-2012)