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Distribution and origin of biologically available phosphorus in the water of the Meiliang Bay in summer

science china Earth sciences 2006年第z1期49卷 146-153页

作者： HUANG Qinghui, WANG Zijian, WANG Donghong, MA Mei & WANG Chunxia State key laboratory of environmental aquatic Chemistry, Research Center for Eco-environmental sciences, Chinese Academy of sciences, Beijing 100085, china key laboratory of yangtze aquatic environment (Ministry of Education), college of environmental science and engineering, tongji university, shanghai 200092, china Chinese Acad Sci Ecoenvironm Sci Res Ctr State Key Lab Environm Aquat Chem Beijing 100085 Peoples R China tongji Univ Coll Environm Sci & Engn Minist Educ Key Lab Yangtze Aquat Environm Shanghai 200092 Peoples R China

The investigation and continuous monitoring with an innovative iron oxide embedded cellulose acetate membrane (FeO/CAM) on the concentrations of biologically available phosphorus (BAP) were conducted in the Meiliang Bay of the Taihu Lake during summer in 2004. The results showed that the concentrations of dissolved (FeO-DP), particulate (FeO-PP) and total bioavailable phosphorus (FeO-P) had similar horizontal distribution. The BAP concentrations were the highest in those estuaries in the northern bay. With the decrease of the distance to the estuary or long shore,there was little difference between BAP concentrations in an open lake area. During the observation period, algal blooms occurred in most waters of the northern bay, which was reflected from the high concentrations of chlorophyll a (Chl-a). While they were not highest in the estuarine waters of those major rivers, this is the case for the BAP concentrations. The concentrations of Chl-a had a significantly positive correlation with those of bioavailable phosphorus in the open area of the Meiliang *** the sediment resuspension induced by wind and wave, BAP concentrations increased in a short-term, indicating that the riverine P inputs mainly contribute to the concentrations of BAP in the estuarine water while internal P release was the major source of BAP in the open lake area. In the eutrophic shallow lake, the blooms of alga may cause pH increase and further result in internal P release. The above results showed that the new membrane of FeO/CAM can be used to monitor the concentrations of BAP and provide the scientific justifications for the control strategy of the lake eutrophication.

关键词： phosphorus, bioavailability, eutrophication, resuspension, Taihu Lake.

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Predicting bioconcentration factor values of organic pollutants based on medv descriptors derived QSARs

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science china Chemistry 2007年第5期50卷 587-592页

作者： CUI ShiHai1,2, YANG Jing1, LIU ShuShen2,3 & WANG LianSheng2 1 college of Chemistry and environment, Nanjing Normal university, Nanjing 210097, china 2 State key laboratory of Pollution Control and Resources Reuse, School of the environment, Nanjing university, Nanjing 210093, china 3 key laboratory of yangtze aquatic environment, Ministry of Education, college of environmental science and engineering, tongji university, shanghai 200092, china 1. college of Chemistry and environment Nanjing Normal University Nanjing 210097 China 2. State key laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210093 China 3. key laboratory of yangtze aquatic environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai 200092 China

The molecular electronegativity-distance vector (MEDV) is employed todescribe the chemical structure of organic *** linear relationships between themolecular descriptors and BCF values are developed by best subset regression and partial leastsquare regression *** main structural factors influencing the bioactivities are -CH2,-X,-Cnot <,- C not <,-O-.The high values of r2 and q2_(LOO) present good estimation ability and stabilityof *** prediction power for external samples is validated by the model developed from thetraining set.

关键词： POPs, BCF, MEDV, QSAR

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Organochlorine pesticides characteristics in water column of strategic drinking water sources in the yangtze estuary

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Acta Geochimica 2006年第S1期 181-182页

作者： Qinghui HUANG1, Jianhua LI1, Jianfu ZHAO2, Ran XU1, Li XIE2 1 key laboratory of yangtze aquatic environment of Ministry of Education, college of environmental science and engineering, tongji university, shanghai 200092,china 2 State key laboratory of Pollution Control and Resources Reuse, college of environmental science and engineering, tongji university, shanghai 200092,china

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Characteristics of Bathing Wastewater and Its Reclamation with Anoxic-Aerobic Membrane Bioreactor （AO-MBR） Process

Characteristics of Bathing Wastewater and Its Reclamation wi...

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2012年环境污染与大众健康学术会议

作者： Mohamed Ahmed Ahmed Eid, Rongchang Wang, Jianfu Zhao State key laboratory of Pollution Control and Resource Reuse key laboratory of yangtze aquatic environment MOE, college of environmental science and engineering, tongji university, shanghai 200092, china

Membrane Bioreactor （MBR） wastewater treatment technology is being successfully used for treating wastewater. The aims of this research were to investigate the performance of a full-scale anoxic-aerobic MBR （AO-MBR） for treating bathing wastewater and to evaluate the feasibility of using the treated wastewater. To achieve these goals, bathing wastewater was treated by an AO-MBR system with a capacity of 120 m 3 d -1 . The water quality of influent and effluent were monitored and evaluated for different reuse purposes. The obtained results showed that the use of AO-MBR for wastewater treatment is sufficient to remove chemical oxygen demand （COD）, nitrite （NO - 2 -H）, ammonium （NH 4 + -N） and turbidity with average values of 92.0%, 89.66%, 88.1 and 99.21%, respectively. Moreover, the values of PH, Total dissolved solids （TDS）, and dissolved oxygen （DO） meet the Chinese’s water quality standards for reclamation （GB/T18920-2002, GB/T18921-2002）. For the AO-MBR performance, the removal efficiencies of the study parameters were stable during the experimental period. We concluded that AO-MBR is a suitable and reliable process to treat bathing wastewater for water reuse.

关键词： Bathing wastewater membrane bioreactor AO-MBR system recycling irrigation

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MBR和BAF用于城市污水深度处理的工艺特性比较

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水处理技术 2010年第4期36卷 82-85页

作者：王荣昌童浩郅玉声同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室长江水环境教育部重点实验室上海200092

采用膜生物反应器(MBR)和曝气生物滤池(BAF)2种工艺分别对以生活污水为主的城市污水进行深度处理,以达到污水回用的目的。中试结果表明,在平均水温仅为5℃的情况下,MBR工艺的处理效果明显优于BAF,MBR工艺对COD、BOD5、NH4+-N和TP的去除... 详细信息

采用膜生物反应器(MBR)和曝气生物滤池(BAF)2种工艺分别对以生活污水为主的城市污水进行深度处理,以达到污水回用的目的。中试结果表明,在平均水温仅为5℃的情况下,MBR工艺的处理效果明显优于BAF,MBR工艺对COD、BOD5、NH4+-N和TP的去除率分别可以达到75%、92%、95%和90%,而BAF对COD、BOD5、NH4+-N和TP的去除率仅为70%、78%、29%和82%。经核算,MBR和BAF的污水处理运行费用分别为0.82元·m-3和0.55元·m-3。与BAF相比,MBR具有处理效果优良、出水稳定、占地面积少,且维护管理方便等特点,因此,在以污水回用为目的的实际工程中推荐采用MBR工艺。

关键词：膜生物反应器曝气生物滤池污水回用低温

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Origin and three-dimensional fluorescence spectrum of the chromophoric dissolved organic matter in yangtze estuary, East china

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Acta Geochimica 2006年第S1期 262-262页

作者： Fan YANG, Qinghui HUANG, Jianhua LI, Xiaomin ZHU key laboratory of yangtze aquatic environment of Ministry of Education, college of environmental science and engineering, tongji university, shanghai 200092, china

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Effect of leachate inoculum on biopretreatment of municipal solid waste by a combined hydrolytic-aerobic process

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Journal of environmental sciences 2009年第8期21卷 1162-1168页

作者： ZHANG Dongqing, HE Pinjing, SHAO Liming State key laboratory of Pollution Control and Resources Reuse, key laboratory of yangtze River Water environment, college of environmental science and engineering, tongji university, shanghai 200092, china. [a]State key laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China

The biopretreatment of municipal solid waste by a combined hydrolytic-aerobic process has become of great interest for biostabilization or biodrying. The study aimed at investigating the effect of leachate inoculurn on the biopretreatment. During the hydrolytic stage, the inoculum addition at the ratio of leachate to waste （LWR） of 5% and 7% stimulated the start-up of hydrolysis and enhanced the hydrolysis rate by 27.4% and 24.2%, respectively; whereas the inoculation at LWR of 1% had almost no effect on the hydrolysis rate and the inoculation at LWR of 10% reduced the hydrolysis rate by 12.7%. During the subsequent aerobic stage, the inoculations at LWRs greater than 5% decreased organics degradation rate. As a whole, compared with none inoculation, the total degradation rates of organics for inoculating trials at LWRs of 5%, 7% and 10% decreased by 14.5%, 14.3% and 32.7%, respectively. Correspondingly, their net water removal rates were reduced by 4.4%, 5.8% and 19.0%. The inoculation at LWR of 1% could not significantly affect the biopretreatment. The inoculum addition at LWR of 5% and 7% could shorten hydrolytic stage and thus accelerate the whole combined process. Moreover, the inoculations at LWRs greater than 5% were favorable for lignocelluloses degradation.

关键词： biopretreatment hydrolysis-aeration inoculation leachate municipal solid waste

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Effect of proteins,polysaccharides,and particle sizes on sludge dewaterability

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Journal of environmental sciences 2009年第1期21卷 83-88页

作者： SHAO Liming,HE Peipei,YU Guanghui,HE Pinjing State key laboratory of Pollution Control and Resources Reuse,key laboratory of yangtze River Water environment,college of environmental science and engineering,tongji university,shanghai 200092,china State key laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China. E-mail: solidwaste@***

Four batch experiments of hydrolysis and acidification were carried out to investigate the distributions of proteins （PN） and polysaccharides （PS） in the sludge, the PN/PS ratio, the particle sizes, and their relationship with sludge dewaterability （as determined by capillary suction time, CST）. The sludge flocs were stratified through centrifugation- and ultrasound-based method into four fractions：（1） slime, （2） loosely bound extracellular polymeric substances （LB-EPS）, （3） tightly bound EPS （TB-EPS）, and （4） pellet. The results showed that PN was mainly partitioned in the pellet （80.7%） and TB-EPS （9.6%） fractions, while PS distributed evenly in the four fractions. During hydrolysis and acidification, PN was transferred from the pellet and TB-EPS fractions to the slime fraction, but PS had no significant transfer trends. The mean particle sizes of the sludge flocs decreased with hydrolysis and acidification. The pH had a more significant influence on the dewaterability of sludge flocs than temperature. Sludge dewaterability during hydrolysis and acidification processes greatly deteriorated from 9.7 s at raw sludge to 340-450 s under alkaline conditions. However, it was just slightly increased under acidic conditions. Further investigation suggested that CST was affected by soluble PN, soluble PN/PS, and particle sizes of sludge flocs, but was affected slightly by total PN, PS, or PN/PS in the whole sludge flocs and other fractions （except slime）.

关键词： dewaterability extracellular polymeric substances particle size polysaccharides proteins sewage sludge

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Thermal stabilization of chromium slag by sewage sludge: Effects of sludge quantity and temperature

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Journal of environmental sciences 2010年第7期22卷 1110-1115页

作者： Changlin Wu,Hua Zhang,Pinjing He,Liming Shao State key laboratory of Pollution Control and Resources Reuse,key laboratory of yangtze River Water environment,college of environmental science & engineering,tongji university,shanghai 200092,china. [a] State key laboratory of Pollution Control Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science & Engineering Tongji University Shanghai 200092 China. E-mail: solidwaste@***

To investigate the feasibility of detoxifying chromium slag by sewage sludge, synthetic chromium slag containing 3% of Cr（Ⅵ） was mixed with sewage sludge followed by thermal treatment in nitrogen gas for stabilizing chromium. The effects of slag to sludge ratio （0.5, 1 and 2） and temperature （200, 300, 500, 700 and 900℃） on treatment efficiency were investigated. During the mixing process before thermal treatment, 59.8%-99.7% of Cr（Ⅵ） was reduced, but Cr could be easily leached from the reduction product. Increasing heating temperature and decreasing slag to sludge ratio strengthened the reduction and stabilization of Cr（Ⅵ）. When the slag to sludge ratio was 0.5 and thermal treatment temperature was 300℃, the total leached Cr and Cr（Ⅵ） declined to 0.55 mg/L and 0.17 mg/L respectively, and 45.5% of Cr in the thermally treated residue existed as residual fraction. A two-stage mechanism was proposed for the reduction and stabilization of Cr.

关键词： chromium slag sewage sludge reduction detoxification thermal treatment leached concentration

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Enzyme extraction by ultrasound from sludge flocs

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Journal of environmental sciences 2009年第2期21卷 204-210页

作者： YU Guanghui,HE Pinjing,SHAO Liming,ZHU Yishu State key laboratory of Pollution Control and Resource Reuse,key laboratory of yangtze River Water environment,college of environmental science and engineering,tongji university,shanghai 200092,china. State key laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China

Enzymes play essential roles in the biological processes of sludge treatment. In this article, the ultrasound method to extract enzymes from sludge flocs was presented. Results showed that using ultrasound method at 20 kHz could extract more types of enzymes than that at 40 kHz and ethylenediamine tetraacetic acid （EDTA） methods. The optimum parameters of ultrasound extraction at 20 kHz were duration of 10 min and intensity of 552 W/g TSS. Under the optimum condition, ultrasound could break the cells and extract both the extracellular and a small part of intercellular enzymes. Ultrasound intensity was apparently more susceptive to enzyme extraction than duration, suggesting that the control of intensity during ultrasound extraction was more important than that of duration. The Pearson correlation analysis between enzyme activities and cation contents revealed that the different types of enzymes had distinct cation binding characteristics.

关键词： enzymes extracellular polymeric substances extraction method sludge flocs statistical analysis ultrasound

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