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	1. A model of submerged membrane bioreactor removing organic substrate and its applications
	Feng Li,Feng Lijuan,Fan Huiju,Zhang Liqiu
	Environmental Science and Techology 12 March 2012
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	Abstract:In this paper, ROM model, a kinetics model on organic substrate removal, was established on the basis of material balance in submerged membrane bioreactor (SMBR). According to the model, the organic substrate removal rate is determined by not only the organic substrate concentrations in influent and effluent, hydraulic retention time (HRT), but also the organic substrate concentration removed by membrane module and sludge retention time (SRT). Meanwhile, SRT and the maximum value of mixed liquor volatile suspended solids (MLVSS) without discharging sludge can be determined as well as the concentration of MLVSS can be predicted in reactor. Brewery wastewater was chosen and examined to verify the model and the results showed that the experimental data were coincident with the calculating data.
	TO cite this article:Feng Li,Feng Lijuan,Fan Huiju, et al. A model of submerged membrane bioreactor removing organic substrate and its applications[OL].[12 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4470659


	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

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	3. Magnetically separable mesoporous silica nanocomposite and its application in Fenton catalysis
	XIA Min,LONG Mingce,CHEN Chen,CHEN Chao,CAI Weimin,ZHOU Baoxue
	Environmental Science and Techology 09 June 2011
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	Abstract:A novel magnetically separable core/shell type nanocomposite was synthesized in a facile way and characterized by XRD, UV-Vis, FT-IR, TEM, Nitrogen physisorption and Magnetite susceptibility measurements. In the synthesis procedure, the mesoporous silica shell was coating on the surface of magnetic core directly via a nano-assembling method. After calcination at high temperature (550 oC) for template removal, the spinel phase of maghemite core was retained without any transformation. The resulting material possessed a regularly hexagonal mesoporous structure with a high specific surface area (908.70 m2/g), which were favorable to further functional modification. Once incorporated with iron species by in situ synthesis, the nanocomposite could serve as a Fenton catalyst and was effective in phenol degradation at the given conditions (40 oC, pH=4). At the end of the reaction, it was easily collected by an external magnetic field and remained efficient in reuse.
	TO cite this article:XIA Min,LONG Mingce,CHEN Chen, et al. Magnetically separable mesoporous silica nanocomposite and its application in Fenton catalysis[OL].[ 9 June 2011] http://en.paper.edu.cn/en_releasepaper/content/4431181


	4. Transport and fate of bacteria in SAT system recharged with recycling water
	LIAN Jingjing,LUO Zejiao,JIN Menggui
	Environmental Science and Techology 13 April 2011
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	Abstract:Groundwater recharge with recycling water through soil aquifer treatment (SAT) system was applied in a lot of countries. In the process of recharging, the SAT system plays an important role in degrading organic pollutants, removing bacteria, N, P and so on. Even if the pathogen can be removed effectively, however, it doesn't mean that there is no possibility for the pathogen going through aerated zone and contaminating groundwater. This paper presents an experiment on the transport and fate of the bacteria (E.coli) in SAT system, a packed silt soil column, under saturated conditions. The simulated solution considered the basic control index and maximum limit value of groundwater recharge with urban recycling water. The concentration of bacteria was 105-CFU/L in the secondary discharge standard of wastewater treatment plant effluent. The experiment included two recharging stages (firstly for 12 days and secondly for 22 days) with 11 days drying between them The results showed that there was no detection of E.coli, and the electric conductivity, total nitrogen, IMn became the same finally between the influent and effluent. The concentration of E.coli in the solid phase decreased from up to down. Because of the growth and metabolism of bacteria, the soil column was blocked, which was resolved through drying. This simulation of recycling water recharge in lab could make people understand the transport and fate of contaminants better, and provided reference to practical projects.
	TO cite this article:LIAN Jingjing,LUO Zejiao,JIN Menggui. Transport and fate of bacteria in SAT system recharged with recycling water[OL].[13 April 2011] http://en.paper.edu.cn/en_releasepaper/content/4421889


	5. 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


	6. Biogas Yields of Food and Green Wastes via Batch Anaerobic Digestion
	Liu Guangqing ,Zhang Ruihong
	Environmental Science and Techology 17 March 2011
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	Abstract:Biogas and methane yields of food waste and green waste and their mixture were determined using batch anaerobic digesters at mesophilic (35 ± 2oC) and thermophilic (50 ± 2oC) temperatures. The mixture was composed of 50% food waste and 50% green waste, based on the volatile solids. The thermophilic digestion tests were performed with four different feed (food) to inoculm(sludge) ratios (F/I) (1.6, 3.1, 4.0 and 5.0) and the mesophilic digestion was conducted at one F/I (3.1). The results showed that the F/I significantly affected the biogas production rate. At four F/Is tested, after 25 days of thermophilic digestion, the biogas yield was determined to be 778, 742, 784 and 396 mL/gVS for food waste, respectively; 631, 529, 524 and 407 mL/gVS for green waste, respectively; and 716, 613, 671 and 555 mL/gVS for the mixture, respectively. About 80% of the biogas production was obtained during the first 10 days of digestion. At the F/I of 3.1, the biogas and methane yields from mesophilic digestion of food waste, green waste and their mixture were lower than the yields obtained at thermophilic temperature. The biogas yields were 430, 372 and 358 mL/gVS, respectively, and the methane yields were 245, 206, and 185 mL/gVS, respectively.
	TO cite this article:Liu Guangqing ,Zhang Ruihong . Biogas Yields of Food and Green Wastes via Batch Anaerobic Digestion[OL].[17 March 2011] http://en.paper.edu.cn/en_releasepaper/content/4416927


	7. Study on the inhibition of methanogenesis in anaerobic granules by methyl fluoride
	HAO Liping,LI Lei,LU Fan,SHAO Liming,HE Pinjing
	Environmental Science and Techology 13 February 2011
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	Abstract:Methyl fluoride (CH3F), applied at the appropriate concentration, is considered to be a rather specific inhibitor of acetoclastic methanogenesis (AM), while hydrogenotrophic methanogenesis (HM) is unaffected. Although the application of CH3F for quantifying methanogenic pathways in natural anoxic environments has been well established, its effect on methanogenesis in anaerobic granules is few reported. Herein, we tested the inhibition of CH3F on methanogenesis in the mesophilic anaerobic granules and evaluated this inhibitor technique to monitor carbon flow in artificial methanogenic systems. The results showed that the inhibitory effect increased with the initial CH3F concentrations up to 5%. Stable maximum inhibition with 97.5% methanogenic activity reduced was achieved when 5% CH3F was added to the gas, which was higher than that applied in other anoxic systems.
	TO cite this article:HAO Liping,LI Lei,LU Fan, et al. Study on the inhibition of methanogenesis in anaerobic granules by methyl fluoride[OL].[13 February 2011] http://en.paper.edu.cn/en_releasepaper/content/4410647


	8. Experimental investigation on styrene emission with a 1000m3/h plasma system
	Zhang xuming,Yan Keping
	Environmental Science and Techology 20 January 2011
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	Abstract:IThis paper reports experimental investigations on plasma-induced styrene emission abatement in air at room temperature (24±2 ℃) and pressure. Tests were performed with a 1000 m3/h plasma system under DC corona discharge. It is observed that styrene destruction in DC glow discharge is negligible in contrast to streamer corona. When relative humidity (RH) is in the range of 30 %-80 %, the energy consumption for styrene decomposition rises with RH value. The energy coefficient β value becomes larger with increasing either RH or the initial styrene concentration for RH in 30 %-80 % and the concentrations within 90-1000 ppm, respectively. With regards to those dependence sensitivity, the lower the concentration, the more sensitive to the RH value. Under optimal condition (100 ppm initial concentration, 35 %RH), the β value is 18.73 J/L.
	TO cite this article:Zhang xuming,Yan Keping. Experimental investigation on styrene emission with a 1000m3/h plasma system[OL].[20 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4407647


	9. Direct reduction of copper oxide into copper under hydrothermal conditions
	Yao Guodong,Huo Zhibao,Cao Jianglin,Jin Fangming
	Environmental Science and Techology 11 January 2011
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	Abstract:A new preparation method of Cu from CuO under hydrothermal conditions was investigated. Glucose was employed as reducing agent. Results showed that CuO can be reduced easily into Cuo with glucose as reductant at 220 to 250 C with NaOH. The reaction conditions such as reaction time, reaction temperature, sodium hydroxide concentration and water filling played key roles in purity of the products. The proposed method provides an efficient and green conversion of CuO into Cuo without expensive and toxic reducing agent at low temperatures.
	TO cite this article:Yao Guodong,Huo Zhibao,Cao Jianglin, et al. Direct reduction of copper oxide into copper under hydrothermal conditions[OL].[11 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4405839


	10. Production of acetic acid from lignin model compound by hydrothermal process
	ZEN Xu,CAO Jianglin,JIN Fangming,HUO Zhibao
	Environmental Science and Techology 09 January 2011
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	Abstract:In this paper, the production of acetic acid from guaiacol, an important lignin model compound, under hydrothermal conditions was examined Hydrothermal experiments were conducted at different temperatures for different reaction times with different additive ratios of H2O2. The results show that a considerable amount of acetic acid can be produced in hydrothermal oxidations of guaiacol. The highest yield of acetic acid is about 10% at 300 C for 60 s with the additive ratio of H2O2 80%. Surplus addition of oxygen will accelerate the oxidation of acetic acid. The method should be expected to become a promising technology for reutilizing paper mill wastewater.
	TO cite this article:ZEN Xu,CAO Jianglin,JIN Fangming, et al. Production of acetic acid from lignin model compound by hydrothermal process[OL].[ 9 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4405320

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