Pre One:Simultaneously nitrification and denitrification with excess sludge reduction in an attached growth system combining anaerobic fermentation and aerobic swim-bed processes.

Next One:Start-up of the anaerobic hydrolysis acidification (ANHA)simultaneous partial nitrification, anammox and denitrification (SNAD)/enhanced biological phosphorus removal (EBPR) process for simultaneous nitrogen and phosphorus removal for domestic sewage treatment