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汪琦 《安全.健康和环境》2007,7(11):24-26
介绍了中国石化扬子石化有限公司芳烃厂加氢裂化车间清洁生产管理体制、环境管理目标及环境管理措施.通过持续推进清洁生产,提高了职工对于环境保护的认识,减少了装置污染物排放,降低了能耗物耗,提高了经济效益,并强化了车间的生产管理. 相似文献
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本文介绍了利用废气余热处理洗精煤,改造解冻库热源.改造后不仅节约了能源,而且减少了废气的排放,实现了洗精煤解冻环节的清洁生产,产生了良好的经济效益和环境效益. 相似文献
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日前,《上海环境科学》召开了办刊与发展研讨会,市新闻出版局、市环科院、交通大学、同济大学、华东师范大学、华东理工大学等单位的9位领导、专家出席了会议。编辑部在会上通报了2005年度办刊的有关工作,对稿件刊用情况进行了详细的分析,并介绍了重新创刊的调研情况。各位专家、学者也各抒己见,对期刊的发展提出了自己的见解。 相似文献
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研究比较膜生物反应器(MBR)工艺与常规工艺和臭氧生物活性炭(O3-BAC)工艺处理长江原水的污染物去除效果。MBR工艺对浊度、UV254和CODMn的去除率分别达到96%、36%和32%,与常规工艺基本相当,弱于O3-BAC工艺。MBR工艺对氨氮去除率稍低于O3-BAC工艺,对挥发性有机毒物的去除效果却好于后者,常规工艺去除这2种污染物不理想。O3-BAC工艺出水加氯后消毒副产物生成量最少,仅有MBR工艺和常规工艺的70%,这表明O3-BAC工艺在减少加氯后消毒副产物的生成方面优势明显,同时也说明依靠MBR工艺的生物降解能力大幅减少消毒副产物生成的可行性不高。 相似文献
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我国含酚废水处理技术研究进展 总被引:13,自引:0,他引:13
介绍了我国近年来在含酚废水处理方面取得的一些进展,主要有萃取法、吸附法、生化法、化学法、超临界氧化法、臭氧氧化法等。并概要介绍了各种方法的优点和不足。 相似文献
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针对高铝粉煤灰碱石灰烧结多资源利用工艺过程中重金属元素迁移规律和潜在环境影响量化问题,基于物质流分析方法,分析该工艺中重金属元素的边界输入输出和内部迁移规律.结果表明,输入端54%的铅元素由工业过程废弃物即高铝粉煤灰带入,其余来自工业原材料.输出端64%的铅元素进入产品,其余部分进入废弃物.该工艺主要环境排放节点在烧结和水泥生产环节.通过定义相对环境排放指数(REEI),比较分析该工艺与拜耳法工艺重金属排放情况.结果表明,该工艺单位氧化铝产量铅元素净排放显著降低,铬元素环境排放量与拜耳法基本持平,说明高铝粉煤灰碱石灰烧结多资源利用工艺不仅可以实现高铝粉煤灰的综合利用,也可以显著降低氧化铝产品的重金属环境影响. 相似文献
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在不同温度下,研究了流化填料分格式SBR工艺(简称MESBR工艺)与传统的SBR工艺的COD去除率,有机物降解速率,脱氮效果和污泥沉降性能。结果表明:MESBR系统温度下降到5℃时,COD的去除率基本稳定在90%以上,比传统SBR系统高出15%左右;MESBR系统与传统SBR系统的温度系数θ分别为1.021和1.045。温度由20℃下降至5℃时,传统SBR系统的TN和NH3-N去除率分别降低26.5%和20%,而MESBR系统分别降低18.6%和11%。传统SBR系统SVI值随温度变化较大,当温度下降到5℃时SVI值达到234.8 mL/g,而MESBR系统的SVI值没有明显的变化,基本维持在120~130 mL/g。 相似文献
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程吉宏 《辽宁城乡环境科技》2010,(5):53-56
对沈阳市沈水湾污水处理厂的运行现状进行了概述,介绍了浮动填料生化法的工艺原理,通过对1号线浮动填料工艺和2号线活性污泥工艺运行参数的比较,表明浮动填料工艺在出水水质、抗冲击负荷等方面优于活性污泥法。 相似文献
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In this work the parametric study on EDM process using ultrasonic assisted cryogenically cooled copper electrode (UACEDM) during machining of M2 grade high speed steel has been performed. Electrode wear ratio (EWR), material removal rate (MRR) and surface roughness (SR) was the three parameters observed. Discharge current, pulse on time, duty cycle and gap voltage were the controllable process variables. The effect of process variables on EWR, MRR and SR has been analyzed. The MRR, EWR and SR obtained in EDM process with normal electrode, cryogenically cooled electrode and ultrasonic assisted cryogenically cooled electrode have been compared. EWR and SR were found to be lower in UACEDM process as compared to conventional EDM for the same set of process parameters, while MRR was at par with conventional EDM process. The surface integrity of work piece machined by UACEDM process has been found to be better as compared to conventional EDM process. The shape of the electrode has also been measured and it was found that the shape retention was better in UACEDM process as compared to conventional EDM process. Thus in the present work UACEDM process has been established to be better than conventional EDM process due to better tool life, tool shape retention ability and better surface integrity. 相似文献
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1IntroductionIthasbeenreportedthatmunicipalsolidwasteincinerationflyash(MSWFA)containsconsiderableamountsofheavymetals(Berg,1... 相似文献
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ZHANG Zhi-bin ZHAO Jian-fu XIA Si-qing LIU Chang-qing KANG Xing-sheng 《环境科学学报(英文版)》2007,19(5):559-563
The particle characterization from the influent and effluent of a chemical-biological flocculation (CBF) process was studied with a laser diffraction device. Water samples from a chemically enhanced primary treatment (CEPT) process and a primary sediment tank process were also analyzed for comparison. The results showed that CBF process was not only effective for both the big size particles and small size particles removal, but also the best particle removal process in the three processes. The results also indicated that CBF process was superior to CEPT process in the heavy metals removal. The high and non-selective removal for heavy metals might be closely related to its strong ability to eliminate small particles. Samples from different locations in CBF reactors showed that small particles were easier to aggregate into big ones and those disrupted flocs could properly flocculate again along CBF reactor because of the biological flocculation. 相似文献