A novel approach to treat combined domestic wastewater and excess sludge in MBR.
Domestic wastewater was treated by combined anaerobic biofilm-aerobic membrane bioreactor(MBR) process, and part biomass MBR was withdrawn to treat with ozone, then the ozonated sludge was returned to anaerobic inlet. In aerobic MBR, MISS and DO were controlled at 3000-3500 mg/L and 0.8 mg/L respectively. Comparing the experimental results of two stages, it was noticed that ozonation did not affect the removal efficiency for organics but had a significant influence on the removals of NH3-N and TN. During the ozonation period of two months, no excess sludge was wasted, and a zero sludge yield was obtained.
He
Sheng-Bing
SB
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. heshengbing@sina.com
Wang
Bao-Zhen
BZ
Wang
Lin
L
Jiang
Yi-Feng
YF
Zhang
Li-Qiu
LQ
D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors; D010126:Ozone / Q000737:chemistry*; D012722:Sewage / Q000032:analysis*; D018505:Waste Management / Q000191:economics / Q000295:instrumentation* / Q000379:methods*
D012722:Sewage; D010126:Ozone