Research on principles of nutrient removal in UniFed SBR process
UniFed SBR工艺除磷脱氮机理研究

Appropriate volume exchange ratio was investigated in a UniFed SBR lab-scale apparatus treating actual domestic wastewater.When the feed/decant time was 2 hours and volume exchange ratio was not higher than 41.67%,good separation of influent and effluent could be achieved.The principles of nutrient removal of UniFed process were that denitrification and anaerobic phosphate release took place at the bottom of the tank during feed/decant period, nitrification and aerobic phosphate uptake occurred during aeration period. So simultaneous nitrogen and phosphorus removal could be achieved in UniFed SBR process.