Petroleum waste biodegradation with porous biomass support system (PBSS) on rotating biological contactor

A laboratory scale study was conducted to assess the feasibility of the new coupling of rotating biological contactor (RBC) plus porous biomass support system (PBSS) using polyurethane foam as porous support media to biodegrade petroleum refinery wastewater. Polyurethane foam was attached on disks of two four-stage laboratory scale cascade connected RBC units.The two RBC units were operated simultaneously at different but constant, flowrates giving hydraulic loading rates of 0.01, 0.02, 0.03, 0.04 m3/m2/d in two runs keeping the same rotational speed 10 r/min throughout. Organic loading was a less controllable factor in this study.For all of the hydraulic loadings, it was found that the removal efficiency of total chemical oxygen demand (TCOD) and oil were above 80 percent. Ammonia nitrogen and phenol removal were above 90 and 80 percent respectively. The maximum biomass concentration within polyurethane foam was about 30 g/m2 in the first stage for 0.03 m3/m2/d hydraulic loading.The results show that t     

Status of air pollution in Beijing

A study has been made on elements organic constituents, TSP, SO2,NO2 of atmospheric pollutants in Beijing. 17 elements, and some PAHs, e. g. B(a)P, B(b, j, k)P, and B(g, h, i)P, in airborne particles by X-ray fluorescence spectroscopy and HPLC, GC/MS, have been determined respectively. It has been shown that the elements Pb, Zn, S and Cu were more enriched in fine particles and different valence states of sulfur at various sites. It was found that the concentrations of S6+ and S2-were more than 85% and less than 15% of the total sulfur respectively. Concentrations of major PAHs and sulfur-containing compounds increased in winter and in urban area. High values for Pb and Zn in city, Fe and Mn at industrial area and Cu, Al rural sites were obtained respectively. This implies the functions of different elemental sources of various sites. Thus, elements can be from distingushed anthropogenic and natural sources.The main contribution of SO2 was found of to have same seasonal variation as the anthropogenic el     

工程菌处理高纯二甲醚生产废水的研究

工程菌LEY7是以假单胞菌D3 菌株 (Pseudomonassp.D3 )为受体 ,以缓慢牙孢杆菌 3RM2 菌株 (Bacilluslentus 3RM2 ) ,假单胞菌W1 (Pseudomonassp .W1 )和W2 (Pseudomonassp .W2 )为供体 ,用多基因转化原生质球构建而成。工程菌LEY7能同时降解 4种化合物。用工程菌LEY7处理化工废水 ,工艺采用二级氧化。处理效果 :进水COD =10 0 0mg/L ,处理后出水COD在 10 0mg/L以下。COD去除率达到 90 %以上。     

环境激素双酚A释放及降解进展

通过对环境激素双酚A的概念、危害、应用、释放、降解与去除的介绍，指出在今后的科研工作中，加强双酚A降解菌的筛选，并研究其生理、生化、遗传特性，对从分子水平了解其降解机制以及构建高效工程菌具有重要意义。     

天津市环境空气SO2污染现状及分析

天津环境空气SO2的年均浓度始终超过国家二级标准。年均浓度超标主要因为采暖期SO2浓度过高所至，采暖期SO2平均浓度是非采暖期浓度的3倍左右；在2002--2005年的三个采暖期里，SO2污染逐年加重，导致了年均SO2浓度的逐年升高。天津SO2污染与采暖期增多的低烟囱排放、不利的气象条件有关，也与流动源的隐性排放、能源利用效率低下有关。结合天津经济发展速度、每年煤耗增量、现有环境治理手段来做预测，空气SO2浓度要在未来几年内达到国家二级标准仍是不可能的。     

东胜区水环境保护及污水资源化分析

本文介绍了东胜区水资源及水环境概况,在实地调研并以环境技术检测数据为依据分析了该区水环境存在的问题;结合城区经济发展和资源现状,提出该城区实现污水资源化的观点并论证了其现实性和可行性;提出了东胜区推进污水资源化,保障水资源可持续利用的政策措施.     

电脉冲作用下粉体成形的研究

介绍了电脉冲对粉体成形的原理。从电迁移和电脉冲作用下的非平衡相变讨论了粉体成形的机理 ,为块状纳米材料的制备提供一个新思路     

江西省主要城市空气质量预报研究

对建立江西省各主要城市的空气洁净指数及空气污染指数预报模式进行了探讨，并将试验期间预报结果和所属区域空气污染程度进行比较，结果表明，该模式用于各省各主要城市空气洁净指数及空气污染指数预报是可行的。     

Water solubility enhancements of pyrene by single and mixed surfactant solutions

ＩｎｔｒｏｄｕｃｔｉｏｎＳｕｒｆａｃｔａｎｔｓｅｎｈａｎｃｅｔｈｅｒｅｍｅｄｉａｔｉｏｎｏｆＮＡＰＬ ｃｏｎｔａｍｉｎａｔｅｄｓｉｔｅｓｂｙｉｎｃｒｅａｓｉｎｇｔｈｅａｑｕｅｏｕｓ ｐｈａｓｅｃｏｎｃｅｎｔｒａｔｉｏｎｏｆｔｈｅＮＡＰＬｖｉａｍｉｃｅｌｌｅｆｏｒｍａｔｉｏｎ ,ｍｉｃｒｏｅｍｕｌｓｉｆｉｃａｔｉｏｎ ,ｏｒｍｏｂｉｌｉｚｉｎｇｔｈｅＮＡＰＬｐｈａｓｅ (Ｋｉｌｅ ,1989;Ｅｄｗａｒｄｓ,1991;Ｇｕｈａ ,1998ａ ;Ｋｏ ,1998;Ｚｉｍｍｅｒｍａｎ ,1999;Ｂｅｔｔａｈａｒ,1999;Ｗｉｌｌｓｏｎ ,1999;Ｐａ…