"AB"法处理石化污水回用

介绍中原油田石化总厂污水处理站的工艺流程、处理特点。处理后外排水中的石油类、氨氮、悬浮物等指标均满足工业回用水要求。讨论了实际运行中“AB”法的运行特点，以及处理水回用于循环水补充水的具体实施。     

焦化废水的危害度评价

炼焦废水以产生量大,毒性强而广泛引起中外读者的关注.本文通过具体实例对焦化废水的监测分析,明确了废水中可检出的有机污染物可达139种,其中有氰化物、挥发酚、苯并(a)芘等6项超标.为焦化厂环境影响评价及水污染提供依据.     

一种化纤废水处理的运行及分析

化纤废水含有各种难降解有机物，国内外一直未能提出一套较好的处理方法，本文介绍了一种化纤废水的研究，处理工艺及其主要设计参数以及运行管理，事实证明了这种方法是可行的，其具有处理效果稳产，产泥量少，具有一定的消泡作用等优点。     

生物反应器填埋场渗滤液及其处理对策

根据垃圾的降解和稳定机理分析了生物反应器填埋场渗滤液的动态变化规律，并对其处理对策进行了探讨。生物反应器填埋场前期产生的渗滤液可全部回灌，后期再根据实际情况排放处理部分过量的渗滤液。在对渗滤液水量和水质全面直观认识后，再对生物反应器填埋场渗滤液处理工艺进行针对性的选择和设计，并宜采用物化法处理方式。     

Management of hazardous waste in Thailand: present situation and future prospects

 This paper deals with the present scenario of hazardous waste management practices in Thailand, and gives some insights into future prospects. Industrialization in Thailand has systematically increased the generation of hazardous waste. The total hazardous waste generated in 2001 was 1.65 million tons. It is estimated that over 300 million kg/year of hazardous waste is generated from nonindustrial, community sources (e.g., batteries, fluorescent lamps, cleansing chemicals, pesticides). No special facilities are available for handling these wastes. There are neither well-established systems for separation, storage, collection, and transportation, nor the effective enforcement of regulations related to hazardous wastes management generated from industrial or nonindustrial sectors. Therefore, because of a lack of treatment and disposal facilities, these wastes find their way into municipal wastewaters, public landfills, nearby dump sites, or waterways, raising serious environmental concern. Furthermore, Thailand does not have an integrated regulatory framework regarding the monitoring and management of hazardous materials and wastes. In addition to the absence of a national definition of hazardous wastes, limited funding has caused significant impediments to the effective management of hazardous waste. Thus, current waste management practices in Thailand present significant potential hazards to humans and the environment. The challenging issues of hazardous waste management in Thailand are not only related to a scarcity of financial resources (required for treatment and disposal facilities), but also to the fact that there has been no development of appropriate technology following the principles of waste minimization and sustainable development. A holistic approach to achieving effective hazardous waste management that integrates the efforts of all sectors, government, private, and community, is needed for the betterment of human health and the environment. Received: February 26, 2001 / Accepted: October 11, 2002     

秦皇岛市开发区生活污水利用可行性分析

本文通过对秦皇岛经济技术开发区居民小区生活污水进行处理并回用的可行性分析,得出城市生活污水经过适当处理后,完全可以再利用,从而达到节约水资源的目的,实现经济效益与环境效益的统一。     

玻璃生产企业废水综合利用的可行性探讨

本文分析了玻璃生产企业废水的来源,并从耀华玻璃集团实施的废水治理项目的实际出发,阐述了废水经过治理后综合利用的途径,实现废水的零排放,减少环境污染,节约水资源。     

城市垃圾甲烷气体排放及减排对策

本文讲述了城市垃圾的现状以及影响垃圾甲烷排放的各种因素，并根据ＩＰＣＣＧｕｉｄｅｌｉｎｅｓ（１９９５）提供的方法对１９９０～２０１０年江浙沪地区城市垃圾甲烷排放量的变化趋势进行了预测统计计算，１９９０年江浙沪地区城市垃圾甲烷排放量为７１２３万吨，２０１０年预测的甲烷排放量为２６６７６万吨，本文就垃圾中甲烷的排放提出了切实可行的减排方案。     

The economics of tire remanufacturing

The world market for tires is described to identify the current material flow from raw materials to tires and the used tire disposal problem. Then, I describe the value-adding operations in the tire production process and in the tire retreading process. Once retreading is identified as the only recovery alternative that maximizes tire utilization, I explain why heat generation is the only recovery alternative, when retreading is not technically feasible. The economic values of heat generation in electric plants and in cement kilns are discussed. The paper culminates with the case of retreading, the tire remanufacturing process and the recommendation of a simple decision rule for selecting the number of times a tire should be retreaded to maximize its utilization.     

Production of hydrogen by steam gasification of dehydrochlorinated poly(vinyl chloride) or activated carbon in the presence of various alkali compounds

Steam gasification of dehydrochlorinated poly(vinyl chloride) (PVC) or activated carbon was carried out in the presence of various alkali compounds at 3.0 MPa and 560°C–660°C in a batch reactor or in a semi-batch reactor with a flow of nitrogen and steam. Hydrogen and sodium carbonate were the main products, and methane and carbon dioxide were the minor products. Yields of hydrogen were high in the presence of sodium hydroxide and potassium hydroxide. The acceleration effect of the alkali compounds on the gasification reaction was as follows: KOH > NaOH > Ca(OH)₂ > Na₂CO₃. The rate of gasification increased with increasing partial steam pressure and NaOH/C molar ratio. However, the rate became saturated at a molar ratio of NaOH/C greater than 2.0.