共查询到19条相似文献,搜索用时 93 毫秒
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垃圾填埋场渗滤液的蒸发处理工艺 总被引:11,自引:0,他引:11
垃圾填埋场渗滤液是一种难于处理的废水。本文首先对垃圾渗滤液处理工艺所存在的问题进行分析,指出蒸发处理垃圾渗滤液是一类有发展前景的工艺,然后综述了垃圾填埋场渗滤液的蒸发处理工艺。 相似文献
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综述了垃圾填埋场渗滤液的物理化学、生物、土地处理等技术。对某地已投入使用的垃圾填埋场渗滤液的生物处理设施技术改造进行了较详细的分析探讨。 相似文献
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垃圾填埋场渗滤液处理工艺研究进展 总被引:1,自引:0,他引:1
介绍了垃圾渗滤液的来源和特点,结合近些年的工程实际和实验研究,主要综述了垃圾渗滤液的处理方案和技术,包括回灌法、土地处理法、物化法、生物法以及其他处理方法,在比较这些方法的基础上提出了一些建议。 相似文献
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蔡芹 《环境污染治理技术与设备》2003,4(12):76-78
综述了垃圾填埋场渗滤液的物理化学、生物、土地处理等技术。对某地已投入使用的垃圾填埋场渗滤液的生物处理设施技术改造进行了较详细的分析探讨。 相似文献
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用光催化氧化法处理垃圾渗滤液的实验研究 总被引:13,自引:1,他引:13
以城市生活垃圾渗滤液作为研究对象,采用悬浮态半导体催化剂对渗滤液进行处理试验。研究了ZnO/Tio2复合半导体催化剂的催化活性,并研究了各种实验条件、影响因素及处理效果。研究表明,在一定的试验条件下,用ZnO/TiO2复合半导体催化剂处理城市垃圾渗滤液效果较好,可作为垃圾渗滤液的深度处理。同时得到光催化氧化法处理渗滤液的最佳试验参数。 相似文献
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Effects of feed solutions on refuse hydrolysis and landfill leachate characteristics 总被引:9,自引:0,他引:9
Tap water, aerobically pre-treated leachate, and anaerobically pre-treated leachate, were each fed into the top of a series of three simulated landfills columns, filled with municipal solid waste collected in Shanghai, China. Changes in leachate, including pH, total organic carbon (TOC), and volatile fatty acids (VFAs), and the produced biogas were monitored over time. The tap-water-fed columns had a low hydrolysis rate that yielded an acidic environment (pH 4.8-5.4) in the leachate that inhibited methanogenesis reaction in the refuse. When aerobically pre-treated leachate was fed into the columns, the hydrolysis rate of total organic carbon fluctuated between 200 and 400 mg d-1 and methanogenesis in the refuse column was only partly activated. The hydrolysis rate of refuse fed with anaerobically pre-treated leachate was the highest among the three solutions. The high alkaline levels of the anaerobically pre-treated leachate and its methanogenic bacteria led to an early activation of methanogenesis in the refuse columns. The VFAs contributed approximately 40-60% of TOC in tap-water-fed columns, 60-80% of TOC in the columns fed aerobically pre-treated leachate, and up to 70-90% of TOC in columns fed with anaerobically pre-treated leachate. The feed solution had considerably affected leachate characteristics, and then the build-up of the methanogenesis in the refuse column and the composition of fermentation products in the leachate. The success of a bioreactor landfill depends on whether the recycled leachate could yield a favorable methanogenic environment in the top refuse layer, or whether an appropriate pre-treatment is adopted to modify the leachate characteristics. 相似文献
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目前,渗滤液中污染物的粒度分布及其在渗滤液污染控制中的作用日益受到关注。通过系列微滤膜(1.2μm及0.45μm)对某生活垃圾卫生填埋场渗滤液各处理单元的渗滤液进行梯度分离,发现悬浮物对COD、浊度的影响较大;COD主要在胶体态和可溶解态间分配,不同渗滤液中的分配情况不同;磷主要与胶体、悬浮物以各种形式结合而存在;细胶粒和溶解态等小分子对TN的贡献大;不同粒度物质对pH的影响不明显;总残渣在可溶态组分中所占比例较大。膜微滤处理渗滤液可以有效的去除一部分物质,使COD、TP、TN、浊度、电导率都有不同程度的降低,pH逐渐升高,但对总N、残渣的去除效果不好。 相似文献
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Gordon AM McBride RA Fisken AJ Bates TE 《Environmental pollution (Barking, Essex : 1987)》1989,56(4):327-336
Greenhouse experiments were conducted to investigate the nature and severity of stresses imposed on northern hardwood tree species (red maple (Acer rubrum L.) and sugar maple (Acer saccharum Marsh.)) by the application of municipal landfill leachate. Red maple seedlings received applications of untreated and pretreated (lime, activated carbon) leachate, to both leaves and soil, at irrigation rates consistent with evapotranspirational demands. Plant height measurements indicated no significant growth effects arising from leachate application over a 7-week period. Stem diameter, however, was positively affected by applications of both untreated and lime-treated leachate diluted to 75% with deionized water. Iron foliar concentrations were significantly higher in seedlings irrigated with untreated leachate applied to leaves and soil, but not in seedlings where leachate was applied to soil only. Nitrogen foliar concentrations were substantially higher in seedlings receiving undiluted and untreated leachate applied to the soil only. The Cu concentration of the red maple foliage decreased appreciably in plants receiving moderate applications of leachate. Foliar Ca concentrations decreased notably in seedlings irrigated with untreated leachate applied to the soil and with diluted, carbon-treated leachate. The Cu concentration of the red maple foliage decreased appreciably in plants receiving applications of undiluted and 50% water-diluted lime-treated leachate while Mn levels were consistently high across all treatments. Leachate application did not cause any discernable changes in foliar concentrations of P, K, Mg, B or Zn. In an ancillary experiment, sugar maple seedlings were subjected to saturation/ drainage treatment cycles with undiluted and untreated leachate. Severe visible symptoms of vegetative stress were apparent within 24 h and 100% seedling mortality occurred after five such waterlogging cycles. Fe assimilation was apparent in both leachate treatments relative to the 24 h water treatment. Despite the short-term nature of the experiments, the results indicate how quickly forest vegetation may respond to altered chemical environments. This underscores the need for correct installation and control of leachate irrigation systems. 相似文献
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夏季潮滩对上海老港垃圾填埋场渗滤液氮、磷净化效果研究 总被引:3,自引:0,他引:3
垃圾填埋产生的渗滤液造成的环境污染问题El益严重。采用自然湿地对垃圾渗滤液净化有诸多优点,而相关的研究较少。根据渗滤液的不同浓度和不同滞留时间的净化效果不同,采用实验室模拟和培养的方法来研究老港垃圾填埋场附近潮滩对垃圾渗滤液营养盐N、P的净化效果。研究发现:夏季老港中、低潮滩在较短滞留时间(6h)内对各浓度渗滤液中N、P的净化效果不明显,而在较长滞留时间内(96h)中、低潮滩对各浓度渗滤液净化效果明显,净化后污水中N、P含量可达到排放标准;垃圾渗滤液质量分数为5%时,潮滩对N、P的净化效果最为明显。 相似文献
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The estrogenic potentials of leachate samples collected at Laogang Sanitary Landfill in Shanghai, China were measured together with the associated dissolved organic matter (DOM) in leachate samples. Over 99% of the DOM in fresh leachate was removed upon 3-7 years of landfill, leaving only DOM with strong fluorescent activity. Anoxic or aerobic treatment of landfill leachate can further degrade DOM of MW<300 Da and transform those with fluorescent activity of MW>10(5) Da to those of 2000-10(5) Da. Neither landfilling nor storage in anoxic pond effectively removed estrogenic potential of leachate. Fractionation test revealed that residual organic matters of MW 3000-14000 Da and of <600 Da with high UV254 contributed most of the estrogenic activities in leachate. Aerobic SBR treatment considerably reduced the estrogenic potential of these organic matters in leachate. 相似文献
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