TNT炸药废水三维电解氧化实验研究

以不锈钢作为阳极的三维电解反应器对废水的实验研究表明:在最佳电解条件下(极板间距4 cm、电压15 V、pH为3,绝缘粒子与活性炭粒子质量比为0.3,电流强度0.15 A时),电解3 h后TNT和COD的去除率分别为93 %和78 %.并探讨了电化学氧化处理TNT废水的机理.     

Sustainability of Natural and Mechanized Aerated Ponds for Domestic and Municipal Wastewater Treatment in Palestine

Abstract

More than half of the current wastewater treatment facilities constructed in Palestine are waste stabilization ponds (WSP) and have several problems in their operation. This article evaluates three selected case studies on the various pond systems including WSP, algae- and duckweed-based ponds (ABP and DBP, respectively) and one mechanically aerated lagoon (AL) system. The effects of various design and operating parameters on the pond system' performance, with special emphasis on nitrogen removal, are discussed. The effluent quality of WSP and AL complies only with BOD limits, but not with microbiological limits prescribed for agricultural purposes, as determined by national standards. ABP and DBP achieved nitrogen removal only under high surface area demand (5-7 m2capita-1). Suitable plans for modifying existing aerated lagoons or for upgrading natural lagoons are suggested in order to comply with microbiological standards for effluent use in restricted irrigation. Finally, the suggested sustainability criteria for the evaluated pond systems may help the decision makers, as well as their designers and donor countries, to better select and design low-cost treatment options for sustainable wastewater management in developing countries.     

水轮发电机组常见振动的处理方法

结合工作实践,分析了水轮发电机组产生机械振动、水力振动和电磁振动的主要因素,并提出了相应的处理方法。在水电站检修工作中应认真分析水轮发电机组产生振动的因素,对症处理,才能保障设备安全运行。     

浸水预沉法在撒台水库工程坝基处理中的应用

浸水预沉法是处理湿陷性黄土的一种主要措施,该法投资少,效果好.以撒台水库工程坝基处理为例,主要从施工准备、浸水预沉、湿陷评价、注意事项等几方面进行了论述,为湿陷性黄土坝基处理提供一个典范,供同类工程借鉴和参考.