共查询到19条相似文献,搜索用时 265 毫秒
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垃圾转运站产生的渗滤液具有污染物浓度高、水质水量波动大和处理难度大的特点,以某超大型垃圾转运站渗滤液处理工程为例,详细阐述渗滤液水质特点和处理工艺选择原则。渗滤液设计规模450 m3/d,采用“预处理+厌氧系统+两级A/O+内置式超滤+芬顿高级氧化+BAF”组合工艺,工程投资5 850万元,运行费用50.53元/m3,实际运行出水水质稳定达到《生活垃圾填埋场污染控制标准》(GB 16889—2008)表2标准,主要污染物指标COD、BOD5、NH3-N、TN、TP、SS平均去除率分别为99.8%、99.9%、99.2%、98.1%、98.9%、99.8%。该组合工艺具有出水水质稳定、耐冲击负荷能力强、运行成本低等优点,并且没有传统膜法产生浓缩液的问题,实现了渗滤液的全量化处理。 相似文献
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膜生物反应器+双膜法工艺在生活垃圾渗滤液处理中的应用 总被引:1,自引:0,他引:1
渗滤液的处理是生活垃圾填埋场运行过程中的难题.本文结合工程设计和运行实例介绍了膜生物反应器+双膜法工艺(NF或RO)在生活垃圾渗滤液处理工程中的流程设计、设计原理、运行效果和运行成本,认为该工艺能稳定达到新排放标准的要求,应用于垃圾渗滤液的处理具有较好的发展前景。 相似文献
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城市生活垃圾渗滤液成分复杂,污染物质量浓度大,故处理难度较大。结合南通市城市垃圾填埋场渗滤液处理工程,介绍了工艺流程、建设情况、原水水质变化情况。特别分析了原水超标而产生的问题及解决措施。最后通过调试分析出水水质不能达标的原因及反思了设计缺陷。 相似文献
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黑龙江某市垃圾填埋场的渗滤液采用两级DTRO反渗透膜处理工艺,使渗滤液处理达到排放标准,文中介绍了此处理工艺中各个构筑物的设计参数和工程运行情况。 相似文献
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垃圾焚烧发电厂产生的渗滤液具有污染物成分复杂、水质水量波动大、有机物和氨氮浓度高、处理难度大的特点,以国内某垃圾焚烧发电厂450 m3/d的渗滤液处理项目为例,针对垃圾焚烧发电厂渗滤液的特点,采用UASB+A/O+MBR+两级RO组合处理工艺,确保处理后出水稳定达到《生活垃圾填埋场污染控制标准》(GB 16889—2008)。RO浓缩液采用高压管网式反渗透(STRO)减量化处理后回喷焚烧炉。近两年的工程运行结果表明,该组合工艺具有耐冲击负荷能力强、处理出水稳定达标、占地省等优点,对COD、BOD5、NH3-N、TN的平均去除率分别为99.8%、99.9%、99.0%、98.7%,渗滤液处理系统运行成本为47.05元/m3。 相似文献
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R. Toddington BSc BA CChem FRSC CEng FIChemE M. Pankhania BSc PhD E. C. Clark BSc MSc. 《Water and Environment Journal》2005,19(3):264-271
Landfill liquor (leachate) is produced by complex microbial processes within a landfill site. The long retention period, typically in excess of many years, ensures that easily-biodegradable materials disappear rapidly, whereas intractable (hard) Chemical Oxygen Demand (COD) substances decay slowly. The resultant liquor is often difficult to treat biologically due to high concentrations of Ammoniacal N (amm.N) and low concentrations of nutrient Phosphorus (P) and Biochemical Oxygen Demand (BOD).
The advanced treatment process adopted at the Stewartby landfill site has been based on extensive laboratory trials by WRG Ltd (formerly Shanks Ltd), with technical input from Birse Process Engineering Ltd. This has significantly reduced the risks involved in plant scale-up.
The particular choice of treatment process reflects the stringent discharge consent and the wide variety of waste received at the site, in particular, the presence of hazardous waste producing a leachate which is especially difficult to treat.
Treatment is based on the activated sludge process, assisted by Powdered Activated Carbon (PAC) dosing. The leachate is heated to improve oxidation of amm.N and the process stream also includes Dissolved Air Flotation (DAF) and Sand Filtration to remove suspended solids (SS) and P. Odour control is provided by a two-stage activated carbon unit.
Results from the full-scale treatment plant have been excellent, averaging 70% COD removal and almost 100% amm.N removal and fully satisfying the sewer discharge consents imposed by Anglian Water and the Environment Agency.
This paper describes the laboratory trials, process design and commissioning of the leachate treatment plant at the Stewartby landfill site. 相似文献
The advanced treatment process adopted at the Stewartby landfill site has been based on extensive laboratory trials by WRG Ltd (formerly Shanks Ltd), with technical input from Birse Process Engineering Ltd. This has significantly reduced the risks involved in plant scale-up.
The particular choice of treatment process reflects the stringent discharge consent and the wide variety of waste received at the site, in particular, the presence of hazardous waste producing a leachate which is especially difficult to treat.
Treatment is based on the activated sludge process, assisted by Powdered Activated Carbon (PAC) dosing. The leachate is heated to improve oxidation of amm.N and the process stream also includes Dissolved Air Flotation (DAF) and Sand Filtration to remove suspended solids (SS) and P. Odour control is provided by a two-stage activated carbon unit.
Results from the full-scale treatment plant have been excellent, averaging 70% COD removal and almost 100% amm.N removal and fully satisfying the sewer discharge consents imposed by Anglian Water and the Environment Agency.
This paper describes the laboratory trials, process design and commissioning of the leachate treatment plant at the Stewartby landfill site. 相似文献
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Natural attenuation and characterization of contaminants composition in landfill leachate under different disposing ages 总被引:5,自引:0,他引:5
Lou Ziyang Zhao Youcai Yuan Tao Chen Huili Huan Renhua 《The Science of the total environment》2009,407(10):3385-3391
Chemical Oxygen Demand (COD) composition in landfill leachate would vary as the disposal time extended. Leachates with different ages were collected from Laogang Refuse Landfill of Shanghai, the largest landfill in China with a placement scale of 7600 t refuse per day. To characterize COD composition in leachate, samples were size-fractioned into suspended fractions (> 0.45 μm), colloid fraction (0.45 μm < fraction < 1 K Da MW) and dissolved fractions (< 1 KDa MW) based on the molecular weight distribution. The fractions < 0.45 μm (including colloid fraction and dissolved fractions) in leachate were further divided into 6 fractions, i.e. hydrophobic bases (Ho-base), hydrophobic acids (Ho-acid), hydrophobic neutral (Ho-neutral), hydrophilic bases (Hi-base), hydrophilic acids (Hi-acid) and hydrophilic neutral (Hi-neutral). It was found that the ratio of TOC/TC in leachate decreased over time, indicating that the percentage of organic matters in leachate decreased as the disposal time extended. It was also observed that the hydrophobic fraction accounted to about 50% of the total matters presented in the fraction < 0.45 μm of all leachate samples. The main components in < 0.45 μm fraction were the Ho-acid, Hi-acid and Hi-base fractions. The percentage of Ho-acid in leachate decreased from 60.8% (2 a) to 43.2% (12 a). In addition, leachate with different ages was categorized into 3 phases according to the results of Principle component analysis (PCA). TOC/COD ranges of leachate in periods I, II and III were 40-54.6%, 16.9-41.3% and 10-38.9%, respectively, indicating that the COD contribution of non-carbon reduction substances increased over time in leachate. Hence, the corresponding landfill leachate treatment process should be modified according to the leachate characterization. The results obtained in this study might provide the important information for modeling, design, and operation of landfill leachate treatment systems. 相似文献