有效微生物技术在渗滤液处理中的应用与发展

介绍了有效微生物(EM)的组成、特点及其处理废水的机理;通过与传统的生化法处理垃圾渗滤液的比较,指出了利用EM技术处理垃圾渗滤液的优势,认为该技术不仅能够提高污染物的去除效率,降低污泥产量,而且能够缩短反应器的响应时间;并介绍了EM制剂在国内外的生产情况,对今后EM技术的发展前景提出了展望.     

城市垃圾填埋场渗滤液的水质特性

对垃圾填埋场渗滤液的主要有机污染物、水质影响因素及水质特性进行了较系统的分析     

用磷酸铵镁沉淀法去除沈阳老虎冲垃圾渗滤液中的氨氮

叙述了磷酸铵镁沉淀法去除垃圾渗滤液中氨氮的基本原理,分析了MAP法对氨氮的去除效果,对比了不同的镁盐及不同的反应时间对氨氮的去除效率。结果表明,MAP法对氨氮的去除效率高,产物中重金属的含量低。同时,氧化镁比氯化镁具有更好的氨氮去除综合优势。     

模拟垃圾填埋场稳定化过程研究

采用垃圾填埋堆体模拟装置，对杭州市城市生活垃圾在１９９８年２月至１９９８年１０月期间稳定化过程中的垃圾渗滤液水质指标变化、堆体内部温度变化、垃圾减量化、沉降高度和产气量进行了研究，装入模拟装置的２２１ｋｇ生活垃圾经８个月的降解后，垃圾减量化显著，总量降至１２７ｋｇ，其中有机组分由９４．８ｋｇ（４２．９％）降至２０．９３ｋｇ（１６．５％），无机组分由７２．７１ｋｇ（３２．９％）降至５３．６５ｋｇ（４     

浅析垃圾渗滤液末端处理技术

从垃圾渗滤液的末端处理技术,即预处理、生物处理、后续处理三个方面分析了垃圾渗滤液的单独处理技术,并对渗滤液的回灌技术进行了论述。     

回灌法处理城市垃圾填埋场渗沥液

在调研了国内外文献和模拟试验的基础上,阐述了用回灌法处理城市垃圾填埋场渗沥液的依据、工艺流程和技术参数,提出了应注意的问题。     

垃圾填埋场渗滤液的产生，控制处理

垃圾填埋场作为固体废弃物的一种最终处置方法在三废治理中起着重要的作用。但是垃圾填埋场产生的渗滤液会成为二次污染，本文就渗滤液的产生，控制以及处理进行了探讨。     

厌氧-准好氧型填埋的渗滤液实验研究

通过室内模拟试验，在渗滤液回灌的厌氧填埋柱基本进入稳定状态后，改用准好氧运行方式。同时监测了渗滤液中有机物浓度以压温度、pH值的变化。改变模拟垃圾柱的运行方式两个月以后。氨氯浓度由2000mg／L迅速下降至101．48mg／L，试验结果显示，准好氧运行方式可以解决生物反应器填埋场进入稳定阶段后存在的氨氮浓度高的问题，加速填埋场的稳定。     

Full-scale blending treatment of fresh MSWI leachate with municipal wastewater in a wastewater treatment plant

Fresh leachate, generated in municipal solid waste incineration (MSWI) plants, contains various pollutants with extremely high strength organics, which usually requires expensive and complex treatment processes. This study investigated the feasibility of blending treatment of MSWI leachate with municipal wastewater. Fresh MSWI leachate was pretreated by coagulation–flocculation with FeCl₃ 2 g/L and CaO 25 g/L, plate-and-frame filter press, followed by ammonia stripping at pH above 12. After that, blending treatment was carried out in a full-scale municipal wastewater treatment plant (WWTP) for approximately 3 months. Different operational modes consisting of different pretreated leachate and methanol addition levels were tested, and their performances were evaluated. Results showed that throughout the experimental period, monitored parameters in the WWTP effluent, including COD (<60 mg/L), BOD₅ (<20 mg/L), ammonium (<8 mg/L), phosphorus (<1.5 mg/L) and heavy metals, generally complied with the Chinese sewage discharged standard. Under the experimental conditions, a certain amount of methanol was needed to fulfill TN removal. An estimation of the operation cost revealed that the expenditure of blending treatment was much lower than the total costs of respective treatment of MSWI leachate and municipal wastewater. The outcomes indicated that blending treatment could not only improve the treatability of the MSWI leachate, but also reduce the treatment cost of the two different wastewaters.     

Influence of the geomembrane on time-lapse ERT measurements for leachate injection monitoring

Leachate recirculation is a key process in the operation of municipal waste landfills as bioreactors. To quantify the water content and to evaluate the leachate injection system, in situ methods are required to obtain spatially distributed information, usually electrical resistivity tomography (ERT). However, this method can present false variations in the observations due to several parameters. This study investigates the impact of the geomembrane on ERT measurements. Indeed, the geomembrane tends to be ignored in the inversion process in most previously conducted studies. The presence of the geomembrane can change the boundary conditions of the inversion models, which have classically infinite boundary conditions. Using a numerical modelling approach, the authors demonstrate that a minimum distance is required between the electrode line and the geomembrane to satisfy the good conditions of use of the classical inversion tools. This distance is a function of the electrode line length (i.e. of the unit electrode spacing) used, the array type and the orientation of the electrode line. Moreover, this study shows that if this criterion on the minimum distance is not satisfied, it is possible to significantly improve the inversion process by introducing the complex geometry and the geomembrane location into the inversion tools. These results are finally validated on a field data set gathered on a small municipal solid waste landfill cell where this minimum distance criterion cannot be satisfied.