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	1. Optimization of Operating Conditions for MBR Treating Mustard Tuber Wastewater by RSM
	CHAI Hongxiang,Wei Yinghua,DU Jun,FANG Junhua
	Environmental Science and Techology 24 January 2013
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	Abstract:In this paper the effects of operating conditions of the membrane bioreactor (MBR) treating mustard tuber wastewater with 7% of salinity (calculated as NaCl) on membrane fouling rate was investigated , and the operating conditions of the reactor was optimized. With the increasing rate of filtration resistance with the cumulative permeate volume（Kv）used to characterize the membrane fouling rate, the study designed three sets of single- factor experiments to investigate the effects of suction suspended time (t), aeration intensity (UGr) and transmembrane pressure (ΔP) on Kv. The result showed that with increasing of t, UGr and ΔP, KV decreased at first and then increased, and t, UGr and ΔP had optimal values. With response surface methodology(RSM)，the MBR operating conditions were optimized，and the optimal conditions was as follows: t = 2min, UGr = 12m3m-2h-1 and ΔP = 5KPa. Through analysis of the response surface plots, interactions between the operating conditions were analyzed, and a conclusion was drawn that interaction between t and UGr was strong, and so was interaction between UGr and ΔP, but the interaction between t and ΔP was not significant.
	TO cite this article:CHAI Hongxiang,Wei Yinghua,DU Jun, et al. Optimization of Operating Conditions for MBR Treating Mustard Tuber Wastewater by RSM[OL].[24 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4515610


	2. A Study on the Removal of Carbamazepine and Nitrobenzene in an Enhanced Membrane Bioreactor Process by Adding Powder Activated Carbon
	FAN Huiju,FENG Li,FENG Lijuan,ZHANG Liqiu
	Environmental Science and Techology 31 October 2011
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	Abstract:This paper investigated the removal of carbamazepine and nitrobenzene in an enhanced membrane bioreactor by adding powder activated carbon (PAC). The experimental results of two and half months' continuous operation showed that nitrobenzene can be removed completely no matter whether PAC was added or not. And the contributions of natural volatilization, aeration and activated sludge for the removal of nitrobenzene are 15.2%, 22.2%, and 62.6%, respectively. In comparison to nitrobenzene, carbamazepine's removal was of no avail after one month's operation without adding PAC, however, the removal efficiency of carbamazepine in the enhanced membrane bioreactor with PAC maintained at a stable level of 30%~40% after one month's operation. After PAC dosing, the amounts removed by adsorption and missing (probably biodegradation) both increased greatly, and the overall removal efficiency of carbamazepine raised 24.44 percents. These results indicate the possibility that PAC cannot only adsorb carbamazepine but also promote the biodegradation of carbamazepine. Furthermore, the sludge-water partition coefficient (Kp) and total adsorbed amounts of carbamazepine before and after PAC dosing are ascertained and compared.
	TO cite this article:FAN Huiju,FENG Li,FENG Lijuan, et al. A Study on the Removal of Carbamazepine and Nitrobenzene in an Enhanced Membrane Bioreactor Process by Adding Powder Activated Carbon[OL].[31 October 2011] http://en.paper.edu.cn/en_releasepaper/content/4447919


	3. A distributed model for rainfall-runoff and pollutant transport based on transport rate
	HE Zhiguo,TAYFUR Gokmen,RAN Qihua
	Environmental Science and Techology 18 March 2011
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	Abstract:In this paper, a distributed pollutant transport model was developed using the diffusion wave equation and transport rate-based equation. Finite volume method in space and an implicit backward difference scheme in time were employed in the numerical solution of the two-dimensional governing equations. The developed model was tested against an experimental study involving overland flow and the associated pollutant transport. The satisfactory simulation of the experimental data verifies the accuracy of the model. The developed model can reasonably simulate the high concentration of polluant in overland flow at the early stage of rainstorms.
	TO cite this article:HE Zhiguo,TAYFUR Gokmen,RAN Qihua. A distributed model for rainfall-runoff and pollutant transport based on transport rate[OL].[18 March 2011] http://en.paper.edu.cn/en_releasepaper/content/4417152


	4. Biological municipal wastewater nutrients removal in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactor: effect of organic carbon source addition
	Zheng Xiong,Li Hongjing,Tong Juan,Chen Yinguang
	Environmental Science and Techology 16 January 2009
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	Abstract:The effect of addition of organic carbon sources (acetic acid and waste activated sludge alkaline fermentation liquid) on anaerobic-aerobic (low dissolved oxygen, 0.15-0.45 mg/L) biological municipal wastewater treatment was investigated. The results showed that carbon source addition affected not only the transformations of polyhydroxyalkanoates (PHA), glycogen, nitrogen and phosphorus, but the net removal of nitrogen and phosphorus. The removal efficiencies of TN and TP were respectively 61% and 61% without organic carbon source addition, 81% and 95% with acetic acid addition, and 83% and 97% with waste activated sludge alkaline fermentation liquid addition. It seems that the alkaline fermentation liquid of waste biosolids generated in biological wastewater treatment plant can be used to replace acetic acid as an additional carbon source to improve the anaerobic-aerobic (low dissolved oxygen) municipal wastewater nutrients removal although its use was observed to cause a slight increase of effluent BOD and COD concentrations.
	TO cite this article:Zheng Xiong,Li Hongjing,Tong Juan, et al. Biological municipal wastewater nutrients removal in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactor: effect of organic carbon source addition[OL].[16 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27985

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