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-ana...

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Bibliographic Details
Published in:	Water research (Oxford) 2008-07, Vol.42 (13), p.3385-3392
Main Authors:	Chen, Zhaobo, Ren, Nanqi, Wang, Aijie, Zhang, Zhen-Peng, Shi, Yue
Format:	Article
Language:	eng
Subjects:	anaerobic digestion Anaerobiosis Applied sciences Bioreactors chemical oxygen demand Computer Simulation continuous systems Drug Industry - instrumentation Drug Industry - methods Ethanol Exact sciences and technology Filtration industrial effluents mathematical models Membrane bioreactor (MBR) membrane bioreactors Models, Biological neural networks Other industrial wastes. Sewage sludge Pharmaceutical wastewater Pilot-scale test Pollution Simulation model Two-phase anaerobic digestion (TPAD) upflow anaerobic sludge blanket reactor Waste Disposal, Fluid - instrumentation Waste Disposal, Fluid - methods Wastes wastewater wastewater treatment water flow Water Pollutants, Chemical - analysis Water treatment and pollution
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Summary:	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 1 m 3 h −1 through the CSTR, the UASBAF and the MBR in series, resulting in respective HRTs of 12, 55 and 5 h. 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.
ISSN:	0043-1354 1879-2448