膜生物反应器中的膜污染问题

本文主要论述了一体式膜生物反应器的膜污染问题 ,包括膜污染的数学模型、膜污染种类以及防止膜污染的设计与操作、膜清洗等。     

Integrated measures for preservation, restoration and improvement of the environmental conditions of the Lagoon Olho d'Água basin

The Lagoon Olho d'Água in Pernambuco State, Northeast Brazil has received increasing environmental concern due to significant stress from pollution in the catchment. The existing environmental problems are the result of great pressure from a broad range of human activities, especially in the last 10 years. Serious pollution exists mainly from some industrial and urban activities, which increased intensively after the eighties. There is a strong social and economical pressure for housing and construction near the lagoon, due to the available land nearby beaches and estuarine zone, and recently by growing tourism activities. Uncontrolled land use by low-income communities and the pressure for construction by developers have led to landfilling and to deterioration of water quality in the lagoon catchment. Improvement of the environmental conditions in the catchment needs integrated measures. Guidelines and some specific actions involving several institutions have been established and refer to sanitation and urban infrastructure as the main priorities. A main target is the construction of low-cost sewage system with smaller and decentralised treatment plants.     

大气封闭型扩散浓度估算模式细探

从大气封闭型扩散实际反射路径分析入手,引入上下边界不同的反射率与污染物衰减系数,得出比以往公式更具一般意义的大气封闭型扩散的污染物浓度估算公式,特别适用于边界具有一定吸收能力与污染物质有衰减的情况,从而有效改进污染贡献的估算精度.文中展示的示意图,纠正了以往示意图的错误.      

改善链条炉燃烧的几种有效方法

采用燃煤布湿和安装分层燃烧装置 ,较好地解决了锅炉燃烧不完全的问题 ,降低了煤耗 ,提高了锅炉的热效率     

声波辅助清灰袋滤器的研究

通过改变声波的频率、声压等参数,观察了单独反吹清灰和声波辅助反吹清灰的试验结果。试验证明,声波能有效地降低滤袋的残余阻力和残留粉尘重量。     

GD型电除尘器在矿渣烘干机上的应用

简述了1个GD型电除尘器在矿渣烘干机上应用的工程实例.     

脉冲布袋除尘器净化分银炉含酸碱烟气的控制

介绍了用于净化铅锌冶炼厂分银炉含酸碱烟气的脉冲布袋除尘器的控制。从烟气温度控制、脉冲布袋除尘器清灰控制两个方面作了说明。     

巷道放顶煤人-机-环境系统可靠性研究

应用系统可靠性和人 -机工程学理论 ,建立了急倾斜煤层巷道放顶煤人 -机 -环境系统可靠性模型 ,给出了系统可用度和生产能力的计算公式。结合开滦马家沟矿 972 3工作面人 -机-环境系统分析 ,探讨了提高系统可靠性和生产能力的有效途径。理论分析及实例计算结果表明 ,所建立的模型能简便地找出系统的薄弱环节 ,准确预测系统可用度和生产能力 ,从而为指导矿井设计和生产提供科学依据     

选煤脱除氟、砷的研究

研究了采自西南3省、1市17个选煤厂的原煤和洗精煤样品,分析了灰分、氟和砷含量,探讨了选煤脱除氟、砷的机理和影响因素。结果表明,选煤能有效降低煤中氟、砷的含量,应用前景广阔。     

成都市城市环境与经济协调发展分析

从城市环境与经济发展的协调度方面分析了成都市１９９０－１９９７年间协调度的变化趋势,评估了成都市城市环境与经济协调发展的类型,得出了成都市属于总体协调发展类环境滞后型的结论。