A novel application of TPAD-MBR system to the pilot treatment of chemical synthesis-based pharmaceutical wastewater.
A pilot-scale test was conducted with a two-phase anaerobic digestion (TPAD) system and a subsequential membrane bioreactor (MBR) treating chemical synthesis-based pharmaceutical wastewater. The TPAD system comprised a continuous stirred tank reactor (CSTR) and an upflow anaerobic sludge blanket-anaerobic filter (UASBAF), working as the acidogenic and methanogenic phases, respectively. The wastewater was high in COD, varying daily between 5789 and 58,792 mg L(-1), with a wide range of pH from 4.3 to 7.2. The wastewater was pumped at a fixed flow rate of 1m(3)h(-1) through the CSTR, the UASBAF and the MBR in series, resulting in respective HRTs of 12, 55 and 5h. Almost all the COD was removed by the TPAD-MBR system, leaving a COD of around 40 mg L(-1) in the MBR effluent. The pH of the MBR effluent was found in a narrow range of 6.8-7.6, indicating that the MBR effluent can be directly discharged into natural waters. A model, built on the back propagation neural network (BPNN) theory and linear regression techniques, was developed for the simulation of TPAD-MBR system performance in the biodegradation of chemical synthesis-based pharmaceutical wastewater. The model well fitted the laboratory data, and was able to simulate the removal of COD.
Research Center of Environmental Biotechnology, 2614#, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 202 Haihe Road, Harbin, PR China. zcbhdx@163.com
Zhaobo
Z
Chen
Nanqi
N
Ren
Aijie
A
Wang
Zhen-Peng
ZP
Zhang
Yue
Y
Shi
D000693:Anaerobiosis; D019149:Bioreactors; D003198:Computer Simulation; D004345:Drug Industry / Q000295:instrumentation* / Q000379:methods*; D000431:Ethanol; D005374:Filtration; D008954:Models, Biological; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D014874:Water Pollutants, Chemical; D000431:Ethanol