共查询到20条相似文献,搜索用时 156 毫秒
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介绍了新型电化学含油污水处理技术在胜利油田正理庄接转站的应用情况,从装置运行初期和稳定期对其处理效果和经济效益进行了评价,通过与常规化学加药处理进行对比,证明该工艺运行平稳,水质稳定,克服了化学污水处理造成的不稳定因素,是适合油田含油污水处理的绿色处理技术。 相似文献
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中国油田在近十年中不断地大规模开发,产生了大量的污水,对其处理的工作量也在不断增加。同时油田产生的污水类型变得复杂多样,提高了对污水处理技术和设备的要求。通过对中外油田污水处理的设备、油田污水处理的工艺流程现状以及处理工艺和设备的发展趋势进行了调研,论述了油田污水处理方法中物理法、化学法和生化法等的原理、特点及应用状况,同时对各种处理方法的优缺点进行了比较,展望油田污水处理技术向前的发展方向,提供新的油田污水处理技术思路。 相似文献
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在煤矿的生产管理和技术管理工作中,往往需要做评价工作,而且由于客观事物是错综复杂的,在做这项工作时,还必须从多方面进行综合评价。综合评价有两种情况:其一是将多项评价指标归纳为具有实际意义的综合指标,比如把吨煤的辅助材料消耗、动力消耗、工资、折旧等几项指标归纳为成本一个综合指标进行评价,这种方法比较简单,这里不做专门探讨;其二是多个评价指标无法归纳为 相似文献
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为了解决中国海洋石油某FPSO不停产完成舱室改造的难题,以法律政策为依据,构建了安全评价体系,通过专家评议法、预先风险分析(PHA)、事故树等评价方法,从设计、施工、生产维护等各阶段进行了综合评价,保障了该FPSO生产污水处理系统的升级优化,提升了管理水平。本次评价对海洋石油工程不停产施工等高风险作业,尤其是FPSO舱室改造类项目有很好的借鉴意义。 相似文献
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煤化工生产过程中会产生大量的废水,污水处理十分重要。本文介绍了煤化工水污染的特点和一些常用的污水处理方法,综述了国内近期污水处理技术取得的新进展,展望了今后的发展方向。 相似文献
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工业废水冲击对城镇污水处理系统影响的实验研究 总被引:1,自引:0,他引:1
为考察工业废水冲击对城镇污水处理厂正常稳定运行的影响,在模拟城镇污水处理系统中实施实际工业废水冲击,分析冲击中系统运行性能变化,并采用共代谢效应和生物刺激效应对冲击后系统进行运行恢复。冲击结果表明,工业废水冲击会造成污水处理系统的运行性能下降,特别是氨氮去除性能明显降低;同时,工业废水冲击的影响通常是暂时且可逆的,即使长时间冲击后亦可通过运行调控加以恢复。不同类型工业废水冲击的影响差异明显,高浓度印染废水和低可生化性化工生化出水冲击对运行性能的影响较大,而工业园区综合废水可生化性较高,冲击影响较小。运行恢复结果表明,投加复合营养液,利用共代谢效应和生物刺激效应可以应对不同类型的工业废水冲击,且具有快速、有效的运行恢复效果。 相似文献
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This paper presents an economic model which casts the "Tiebout Hypothesis" in a Von Thumen type model of spatial equilibrium and considers the effect of differential provision of municipal services on household utility levels and housing prices in a politically fragmented urban area. Also in the context of this model three alternative methods of financing municipal services are examined. The article suggests that different levels of municipal services may cause spatial disequilibrium in an urban area, and as households move within the urban area to maximize their utility, they bid up (or down) the price of housing to the extent that their consumer's surplus is capitalized in housing values. Thus, the resultant urban rent gradient may be "kinked" or discontinuous. This paper also presents empirical findings examining the relationship between housing values and several municipal services. 相似文献
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《Food Policy》2019
Although food is an emerging topic on municipal policy and planning agendas, a systematic examination of policy development, its implementation and the instruments used at the urban level is lacking. This study was carried out with the aim of gaining new insights into the prevalence of certain food policy instruments and capacity of policy action. In order to do so, we developed an analytical framework to investigate urban policy and planning approaches related to food issues and applied it in ten large German cities. First, we identified different actor groups and analysed their role in urban food policy (level of involvement in municipal food projects). We then studied the variety of policy and planning instruments and their application for different elements in the food system. For the empirical study, we employed a case study approach and utilised data gathering methods of qualitative research, i.e. expert interviews and document analysis. Our empirical findings in the studied cities reveal that urban food policy activities are still very fragmented and often based on individual initiatives within the administration. Integrated urban food policies and their implementation through urban food strategies are still an exception in major cities in Germany. We found that municipal actors follow mainly sectoral approaches, using a wide array of steering instruments, i.e. informational instruments and public procurement policies. However, their capacities for policy implementation remain limited due to missing financial and staffing resources. Accordingly, the potential the urban food system offers for sustainable development through multifunctionality and sectoral integration, is still underexploited.The systematic approach developed in this study may contribute to a better understanding of different policy approaches taken. The applied typology of policy instruments might also be useful for identifying effective ways to implement urban food strategies, to understand mismatches between instruments and different policy domains, levels and administrative units, e.g. at the urban-rural interface, and to design of new policy instruments. 相似文献
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