SBR法处理化粪池出水的工艺研究

采用经实验运行得到SBR工艺处理化粪池出水的合理的操作模式,能获得90%以上稳定的COD_(cr)去除率及更好的BOD_5去除效果,NH_3-N去除率大于75%,TN去除率大于45%.并考察了污泥浓度、泥龄、污泥负荷与处理效果的关系,以及闲置期对反应周期的影响.实验结果表明,SBR工艺对处理水质、水量负荷变化很大的化粪池出水,是一种理想的工艺选择.     

对一起汽车槽车装车过程中发生闪燃着火事件的分析

利用故障树分析(FTA)对汽车槽车装车过程中引起的闪燃着火事件进行了分析,针对中转油站存在的安全隐患提出整改措施.     

船舶压载管系和压载舱结构设计中新问题的解决方法

IMO对船舶压载水的排放限制给船舶压载管系和压载舱室的设计提出了新的课题，文中设计了以喷射泵的抽吸作用进行循环更换压载水的压载系统，为解决相关问题提供了若干建议和思路。     

储罐拆除安全技术初探

分析了拆除储罐的危险性，提出了相应对策。对拆除储罐的作业方法进行分析，以明晰它们的安全控制点。     

炼化企业罐底油泥处理技术研究进展

炼化企业原油罐、成品油罐及污油罐定期清理过程,会产生大量罐底油泥。罐底油泥含油量大,处理成本高,环境危害严重,是炼化行业关注的重点。有效回收油分和降低处理成本是近几年罐底油泥处理技术研究的主要内容。介绍了以调质-分离、化学法和生物法为主的罐底油泥处理技术及各技术对罐底油泥的处理现状,总结了3种处理方法存在的优缺点及今后的发展方向。     

清罐危险性分析及防范措施

介绍了油罐清罐的类型,论述了油罐清罐的常见风险,并对其进行了分析,同时提出了相应的防范措施.     

处理含油废水的新型过滤器

本文介绍了Ａｕｔｏ－ｓｈｅｌ过滤器的特点，通过现场试验，证明它是一种新型废水处理设备，在操作性能、处理效果及控制大气污染等方面均优于目前炼油厂常用的溶气浮选池。     

Microbiological quality of roof tank water in an urban village in southeastern China

Urban villages are unique residential neighborhoods in urban areas in China. Roof tanks are their main form of water supply, and water quality deterioration might occur in this system because of poor hygienic conditions and maintenance. In this study, water samples were seasonally collected from an urban village to investigate the influence of roof tanks as an additional water storage device on the variation in the microbial community structure and pathogenic gene markers. Water stagnation in th...     

Assessment of Contamination By Percolation Of Septic Tank Effluent Through Natural and Amended Soils

Fly ash has been found to be a potential material for the treatment of municipal and industrial wastewater, and may be useful in the treatment of septic tank effluent. Laboratory columns (30 cm) were used to determine the sorption capacity and hydraulic properties of lagoon fly ash, loamy sand, sand, and sand amended by lagoon fly ash (30 and 60%) and red mud gypsum (20%). The removal of chemical oxygen demand (COD) was high in all column effluents (71–93%). Extent of nitrification was high in Spearwood sand, Merribrook loamy sand and 20% red mud gypsum amended Spearwood sand. However, actual removal of nitrogen (N) was high in columns containing lagoon fly ash. Unamended Spearwood sand possessed only minimal capacity for P sorption. Merribrook loamy sand and red mud gypsum amended sand affected complete P removal throughout the study period of 12 weeks. Significant P leakage occurred from lagoon fly ash amended sand columns following 6–10 weeks of operation. Neither lagoon fly ash nor red mud gypsum caused any studied heavy metal contamination including manganese (Mn), lead (Pb), zinc (Zn), cadmium (Cd) and chromium (Cr) of effluent. It can be concluded that Merribrook loamy sand is better natural soil than Spearwood sand as a filter medium. The addition of lagoon fly ash enhanced the removal of P in Spearwood sand but the efficiency was lower than with red mud gypsum amendment.