共查询到19条相似文献,搜索用时 109 毫秒
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氧化法预处理垃圾渗滤液技术研究及应用 总被引:3,自引:0,他引:3
由于垃圾渗滤液含有多种有毒有害的难降解的有机物,影响了生物处理效果。采用Fenton氧化法、湿式催化氧化法和电解氧化法预处理,可减少渗滤液的污染负荷,提高可生化性,在实际应用中取得良好的效果。 相似文献
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综述了Fenton与类Fenton氧化垃圾渗滤液的研究进展。Fenton法对垃圾渗滤液中难去除有机物尤其是腐殖酸有良好的降解效果。引入光、电、微波、超声波等的类Fenton法减少了药剂用量,提升了去除效果,非均相Fenton实现了催化剂的循环使用。并对Fenton及类Fenton法处理垃圾渗滤液的研究方向进行了展望。 相似文献
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以成都周边80km范围内的8个行政村为调查对象,对区域内这些村垃圾渗滤液的污染状况、产量、水质进行研究,并探讨臭氧氧化联合活性炭吸附处理该渗滤液的技术可行性。结果表明:生活垃圾集中处理的农村,垃圾渗滤液呈收集点、填埋场或焚烧厂周围的多点污染现象;生活垃圾分散处理的农村,垃圾渗滤液呈排放于农田或河流的面源污染现象;在研究区域内,每村垃圾渗滤液的产量为0.07~0.60 t/d;农村垃圾渗滤液的色度、COD、BOD_5、NH_3-N分别为160~1 735倍、611.24~25 396.25 mg/L、124.13~5 241.44 mg/L、26.341~1 751.950 mg/L,BOD_5/TP、NH_3-N/TP比值在221~449和36~174之间,其水质污染物主要是有机物和氮素的复合污染,且碳氮磷比例严重失调。臭氧氧化探究表明,在25℃、臭氧投量1.30g/h、初始p H为8的条件下,反应50min后,出水p H近中性,出水色度、COD、BOD_5的去除率分别达到了90.39%、90.43%和84.78%。再经活性炭填料吸附后,NH_3-N、TP去除率达72.00%、88.79%。即上述6个指标均达到GB16889-2008中水污染物的特别排放限值,故采用臭氧氧化联合活性炭吸附法处理农村垃圾渗滤液具有绿色、高效和技术可行性。 相似文献
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城市垃圾渗滤液处理技术发展现状 总被引:3,自引:0,他引:3
介绍了城市垃圾渗滤液的来源和特点,根据近些年的工程实际和实验研究结果,主要论述了垃圾渗滤液的处理方案和处理技术,包括回灌法、土地处理法、物理化学法、生物法等。对这些处理方法进行了比较,在此基础上提出了相应的建议。 相似文献
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Zhang H Zhang DQ Jin TF He PJ Shao ZH Shao LM 《Journal of environmental management》2011,92(10):2533-2538
Biostabilization can remove considerable amounts of moisture and degradable organic materials from municipal solid waste (MSW), and can therefore be an effective form of pretreatment prior to landfill. The environmental and economic impacts of two combined processes, active stage biostabilization + sanitary landfill (AL), and active and curing stage biostabilization + sanitary landfill (ACL), were compared with sanitary landfill (SL) for MSW with high moisture content. The results indicated that land requirement, leachate generation, and CH(4) emission in the ACL process decreased by 68.6%, 89.1%, and 87.6%, respectively, and the total cost was reduced by 24.1%, compared with SL. This implies that a combined biostabilization and landfill process can be an environmentally friendly and economically feasible alternative to landfill of raw MSW with high moisture content. Sensitivity analysis revealed that treatment capacity and construction costs of biostabilization and the oxidation factor of CH(4) significantly influenced the costs and benefits of the AL and ACL process at an extremely low land price. When the land price was greater than 100 USD m(-2), it became the dominating factor in determining the cost of treatment and disposal, and the total costs of ACL were reduced to less than 40% of those of SL. 相似文献
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准好氧填埋早期渗滤液特征浅析 总被引:10,自引:1,他引:10
本文基于室内垃圾模拟柱试验,分析了准好氧填埋早期垃圾渗滤液的产生过程及垃圾降解的机理,得出了启动期内垃圾渗滤液产量的变化趋势,总结出准好氧结构的部分优点,并针对早期准好氧渗滤液产量的特点作了相应的讨论。 相似文献
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In this study, two pilot-scale aerobic landfill reactors with (A1) and without (A2) leachate recirculation are used to obtain
detailed information on the quantity and quality of leachate in aerobic landfills. The observed parameters of leachate quality
are pH, chloride (Cl−), chemical oxygen demand (COD), biological oxygen demand (BOD), total Kjeldahl nitrogen (TKN), ammonia nitrogen (NH3-N), and nitrate (NO3–-N). pH values of the leachate increased to 7 after 50 days in reactor A1 and after 70 days in reactor A2. Cl− concentrations increased rapidly to 6100 (A1) and 6900 (A2) mg/L after 80 days, from initial values of 3000 and 2800 mg/L,
respectively. COD and BOD values decreased rapidly in the A1 landfill reactor, indicating the rapid oxidation of organic matter.
The BOD/COD ratio indicates that leachate recirculation slightly increases the degradation of solid waste in aerobic landfills.
NH3-N concentrations decreased as a result of the nitrification process. Denitrification occurred in parts of the reactors as
a result of intermittent aeration; this process causes a decrease in NO3− concentrations. There is a marked difference between the A1 and A2 reactors in terms of leachate quantity. Recirculated leachate
made up 53.3% of the leachate generated from the A1 reactor during the experiment, while leachate quantity decreased by 47.3%
with recirculation when compared with the aerobic dry landfill reactor. 相似文献
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为了在达标排放的基础上降低建设规模为Ⅲ类、Ⅳ类型(中小型)垃圾填埋场处理垃圾渗滤液的人工及成本投入,提高系统稳定性,分析了泗县垃圾填埋场2018年3~12月渗滤液处理的运行状况。通过采用“预处理+两级碟管式反渗透+吹脱”的高度自动化工艺对垃圾渗滤液进行处理。结果表明:使用该系统处理后出水CODCr浓度低于26mg/L,NH3-N浓度低于15mg/L,各项出水指标均满足排放标准的要求,系统自动化程度高、稳定性好、且工程总投入834万元、运行期间处理每吨渗滤液花费为56.18元,成本较低适用性好。 相似文献
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A laboratory study using a bench scale model of two units operation involving coagulation process with Moringa oleifera seeds extract as a coagulant and filtration process using hollow fibre microfiltration membrane, was adopted to treat Air
Hitam Sanitary Landfill leachate in Puchong, Malaysia. The performance of the microfiltration membrane in pretreated sanitary
landfill leachate treatment was investigated through a continuous process. The leachate sample was passed through conventional
coagulation process before being filtered through a hollow fibre microfiltration membrane of 0.1 μm surface pores. The hollow
fibre microfiltration membrane decreased the turbidity, colour, total suspended solids, total dissolved solids and volatile
suspended solids in the leachate by 98.30, 90.30, 99.63, 14.71 and 20%, respectively. The results showed that microfiltration
is capable of removing high percentage of solids from leachate and might be considered as a polishing stage after on-site
biological treatment for sanitary landfill leachate. 相似文献