共查询到20条相似文献,搜索用时 93 毫秒
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利用生化技术处理含油污水,是大庆油田处理外排水的首次尝试,大庆油田含油污水生化处理站经过两年的运行,摸索出细菌的生长情况是影响处理后水质的关键因素,而污泥和油含量是影响细菌生长的关键因素,只有控制好系统中的污泥和油含量,才能保证细菌的正常工作,从而使处理后的水质合格。 相似文献
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为使污水达到排入永坪河或再次回用的水质要求,并降低车间生产成本的过程。在先进污水处理工艺的基础上,优化处理细节,提高污水排放合格率。 相似文献
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由于洨河上游天然来水量很少,现有水体主要是接纳生活和工业污水,通过对洨河3个地表水水质站资料的分析发现,沿岸地表水水质属劣Ⅴ类,污染严重,主要超标参数为氨氮、化学需氧量、挥发酚。对沿岸53眼井的水质资料进行分析后发现,地下水水质良莠不齐,水质级别在Ⅱ类-Ⅴ类之间,主要超标参数为总硬度、溶解性总固体等。通过分析部分水质参数发现,地下水水质已受到地表水渗透影响和其他污染。 相似文献
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In a recent paper Garnett (2011) examines the greenhouse gas emissions arising from the global food system. This paper builds on Garnett’s contribution by considering how high levels of food waste contribute to the food chain’s greenhouse emissions and how they can be reduced, something Garnett generally overlooks. The emissions that arise from food waste represent the emissions embedded in the production of food that is then wasted and the emissions that arise from the process of waste disposal. Food waste can also be split into pre-consumer and consumer waste. These distinctions give rise to four categories of food waste related emissions: pre-consumer embedded, pre-consumer waste disposal, consumer embedded and consumer waste disposal emissions. The levels of food waste in each category differ between economies, as do the causes of wastage. Policies to address food waste and the associated emissions need to promote a mixture of technological and behavioural change and be tailored to the economic, cultural and technological conditions in each country. 相似文献
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The automotive industry is an integral component of the global economy and is unique in that it encompasses every aspect of the value chain—from raw materials to design and development, manufacturing, sales and service, and even disposal. All of these value‐creating areas are undergoing significant innovative change as a result of environmental and competitive forces. In this issue, we explore some of the most salient topics related to innovation and product management in the context of the contemporary global automotive industry. 相似文献
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2000年~2004年我国电网负荷特性对比研究 总被引:1,自引:0,他引:1
结合近年我国电网负荷特性变化的特点,对2000年~2004年我国电网包括五大区域电网负荷特性进行了对比分析,为研究我国电网负荷特性变化规律和未来电力负荷特性变化趋势奠定了基础. 相似文献
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ABSTRACTHospitals are large producers of solid waste, of which some is benign, some is extremely hazardous, and much is in between. The cost of segregating and disposing of products in these waste streams is high, and studies have shown there is considerable potential to reduce these costs while simultaneously decreasing environmental impact. In this article we develop an activity-based costing method that assigns waste disposal costs proportionally to each product. By providing disposal cost information at this level of aggregation it is possible to directly influence purchasing decisions, identify priority products for focused interventions, and determine the ratio of a product's purchasing cost to disposal cost. The method is tested on products with different purchasing costs, disposal costs, physical characteristics, and disposal processes. 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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铁屑内电解法在废水处理中的应用研究进展 总被引:20,自引:0,他引:20
总结了铁屑内电解法处理废水的基本原理,其主要包括电化学作用、絮凝作用、过滤吸附作用及电泳作用;着重介绍了铁屑内电解法治理印染、电镀、制药、表面活性剂等多种废水的应用实例;分析了用该法处理各类废水的优点及存在的问题,并提出了相应的措施;指出了铁屑内电解法在国内外的研究方向及在废水处理中的应用前景。 相似文献
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根据我国已建成通车的高等级公路的使用情况,从路基施工前准备、路基施工、台背处理、路面施工及路表面排水处理等方面较全面地分析了水泥混凝土路面破坏的原因及其防治。 相似文献
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