垃圾填埋场渗沥液排放标准的讨论

通过垃圾填埋场渗沥液的来源，性质以及对环境的影响等情况和国内对渗沥液的处理技术分析，根据目前处理渗沥液的技术水平，建议制定适当当前保护环境需要的行业排放标准。     

Study on the effect of landfill leachate on nutrient removal from municipal wastewater

In this study, landfill leachate with and without pre-treatment was co-treated with municipal wastewater at different mixing ratios. The leachate pre-treatment was achieved by air stripping to removal ammonia. The objective of this study was to investigate the effect of landfill leachate on nutrient removal of the wastewater treatment process. It was demonstrated that when landfill leachate was co-treated with municipal wastewater, the high ammonia concentration in the leachate did not have a negative impact on the nitrification. The system was able to adapt to the environment and was able to improve nitrification capacity. The readily biodegradable portion of chemical oxygen demand (COD) in the leachate was utilized by the system to improve phosphorus and nitrate removal. However, this portion was small and majority of the COD ended up in the effluent thereby decreased the quality of the effluent. The study showed that the 2.5% mixing ratio of leachate with wastewater improved the overall biological nutrient removal process of the system without compromising the COD removal efficiency.     

TiO_2/海泡石对垃圾渗滤液吸附性能的研究

通过制备以海泡石为载体的负载二氧化钛的吸附剂,研究二氧化钛/海泡石对垃圾渗滤液的吸附作用。垃圾渗滤液经过初步处理后,在不同的浓度、p H、吸附剂投加量下测量吸附后的总有机碳,在不同的吸附时间点测量相应的总有机碳和化学需氧量。结果表明,垃圾渗滤液的吸附最佳效果的条件为:Ti O 2/海泡石投加量为0.08 g,投加到稀释至COD为437.2 mg/L的垃圾渗滤液中,p H为3,TOC降解率为65.47%,COD降解率为55.56%。     

垃圾填埋场渗滤液性质研究进展

从宏观、中观和微观三个尺度对目前垃圾填埋场渗滤液的性质、处理方法和研究手段进行了系列介绍与比较。比较结果表明．相对于宏观和微观尺度的渗滤液性质的研究,中观尺度的研究将更有助于指导渗滤液处理工艺的发展方向。     

老港填埋场渗滤液性质随工艺变化研究

经老港填埋场渗滤液处理系统的各处理单元处理后的流出液,用不同孔径的系列膜进行了梯度分离。分离前后的渗滤液进行了TOC、TP、TN、氨氮和可溶性P等参数的测定,并建立了各参数与不同孔径膜的关系。结果表明,此工艺对老港填埋场渗滤液的处理具有一定的功效;随着处理工艺的进行,渗滤液的组成发生了较大的改变,其中细胶体部分的百分含量增加,而可溶性部分降低;渗滤液的绝大部分污染物质集中于可溶性部分,而渗滤液中的P主要与大分子的悬浮物和粗胶体结合。     

白泥对填埋场垃圾降解的影响实验研究

在4个相同的密封聚乙烯塑料罐中,分别装填相同组分和重量的青岛市居民区的生活垃圾,并且在4个罐中按不同比例添加白泥,与垃圾混合均匀。实验模拟填埋场的环境条件。定期监测4个罐渗滤液的水质变化,分析比较白泥的添加及添加量的多少对渗滤液的衰减的影响。实验结果表明,白泥的添加能够向反应系统提供一定数量的碱度,可以防止反应系统因出现酸过度累积而受到抑制,在一定程度上加快了垃圾的降解进程。这不仅对于减轻渗滤液处理设施的负荷、加速填埋场的稳定化起着积极作用,而且可以为白泥的资源化利用提供一个可行的途径。     

GC-MS法对垃圾渗滤液生物处理前后微量有机物的研究

运用GC—MS联用技术对吴江市生活垃圾填埋场的渗滤液及生物处理曝气池出水中的微量有机物进行了检测,测得进水主要有机污染物53种,出水主要有机污染物55种。微量有机物总去除率与CODCr去除率相近。     

垃圾填埋场渗滤水的处理技术

综述了垃圾填埋场渗滤水的生物处理、物化处理、土地处理等技术。特别对渗滤水的生物处理进行了较详细的讨论。     

Quality and Quantity of Leachate in Aerobic Pilot-Scale Landfills

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.     

灰渣填埋场渗滤液处理技术研究

垃圾渗滤液,又称渗沥水或浸出液,是指垃圾在堆放和填埋过程中由于发酵和雨水的淋浴,冲刷,以及地表水和地下水的浸泡而滤出来的污水。垃圾填埋场渗滤液是一种高浓度有机废水,其化学特性与填埋场废物成分、填埋方式、填埋龄以及填埋场环境条件等密切相关,一般评价渗滤液的指标包括:COD Cr、BOD5、SS、总氮、氨氮、重金属等,主要污染物为溶解性有机物、氨氮,无机盐类物质含量较高,一般都极难处理而且会对周围环境造成严重的影响,特别是渗入到地下影响地下水,对周围的居民和植物的生存有很大的影响,渗出的渗滤液味道十分难闻也会产生沼气,影响大气环境。因此渗滤液的处理是城市垃圾填埋场正常运行的必不可少的环节之一。本次课题通过实验对渗滤液进行不同技术路线处理,探索渗滤液的有效方法。