城市生活垃圾填埋场渗滤液水质影响因素分析及水质预测

城市垃圾填埋场的研究与设计在我国尚处于起步阶段，妥善处理垃圾渗滤液则是垃圾填埋场设计成败的关键。由于国内填埋场渗滤液水质现场监测资料极有限，且影响渗滤液水质的因素很多，因此填埋场渗滤液水质的确定是其处理工艺研究和设计的基础。本文论述了城市生活垃圾卫生填埋场渗滤液水质的影响因素和预测渗滤液水质的方法，可供渗滤液处理工艺研究、设计与管理者参考。     

垃圾填埋场渗滤液量分析及处理初探

以杭州市天子岭垃圾填埋场为例，对垃圾填埋场的垃圾处理原理，垃圾渗滤液的计算及处理方法进行探讨。     

小型生活垃圾填埋场渗滤液处理工程设计

小型生活垃圾填埋场渗滤液产量少、管理水平低,如何选用合适的渗滤液处理技术是一个令管理者困扰的问题.简要介绍了生活垃圾卫生填埋场渗滤液常用处理技术,结合工程实例,对采用矿化垃圾工艺处理渗滤液进行了探讨,并分析了该技术的特点.     

唐山市某垃圾填埋场对浅层地下水水质的影响

垃圾填埋是我国目前处理城市生活垃圾的主要方式,由此引发的垃圾填埋场渗滤液对地下水污染已成为当前主要的水环境污染.选择唐山市某垃圾填埋场为研究对象,通过对垃圾填埋场周围布孔,对地下水取样和监测,分析了垃圾填埋场对其周围地下水环境的影响.结果表明地下水中污染因子主要为COD、NH4 +-N、NO3-N、总硬度及溶解性总固体.目前该区域地下水已受到垃圾填埋场渗滤液的污染,在第四系地层保持完整而不被破坏的情况下,形成的地下水污染晕深度不超过30 m.随着垃圾填埋场运行时间的延长,垃圾渗滤液对周围浅层地下水环境的影响范围及程度还有待于进一步研究.     

考虑渗滤液回灌作用下垃圾填埋场的边坡稳定数值分析

随着现代城市垃圾的急剧增加,垃圾填埋场的安全问题也就显得尤为重要。文章以西安市江村沟垃圾填埋场为例,采用有限元软件计算了渗滤液回灌前后的渗流场,并运用有限元强度折减法对渗滤液回灌前填埋场的稳定性进行了分析。分析结果表明:填埋场渗滤液回灌后浸润面明显上升,边坡容易失稳;渗滤液回灌前边坡处于稳定状态,其边坡最小安全系数为1.40;在不考虑孔隙水压力情况下,渗滤液回灌后对填埋场的边坡稳定影响不大。     

垃圾渗滤液产量预测

分析了垃圾填埋场渗滤液的产生及其影响因素、危害和特点,重点介绍了国内外垃圾填埋场渗滤液产量预测的主要方法,阐述了各种方法的适用性、特点以及存在的问题.     

城市垃圾填埋场渗滤液控制与处理设计对策

城市垃圾填埋场渗滤液的控制与处理是卫生填埋场设计的重要部分。讨论了渗滤液产生量、水质特性及其影响因素,提出在垃圾填埋场设计中控制渗滤液产生量的方法、渗滤液处理方式选择及处理工艺的对策。     

光催化氧化法处理垃圾填埋场渗滤液的试验研究

在阐述垃圾填埋场渗滤液的产生、特征及国内外治理途径的基础上，对光催化氧化技术用于垃圾填埋场渗滤液的深度处理的可行性及其影响因素进行了实验室规模的试验研究。试验水样取自广州市李坑填埋场渗滤液，经过氧化沟生物法处理的排水，其水质为ｐＨ８０～８５，ＣＯ...     

垃圾填埋场渗滤液特征及其治理

介绍了垃圾渗滤液对水体产生污染的实例，通过讨论和总结揭示了垃圾填埋场渗滤液特征，即垃圾渗滤液污染物浓度高、持续时间长、流量极不均匀、水质变化大。根据垃圾渗滤液特征提出了治理垃圾渗滤液的有效措施。     

城市垃圾填埋场渗滤液深度处理技术探讨与反渗透的试验研究

城市垃圾填埋场渗滤液深度处理技术探讨与反渗透的试验研究硕士生：袁维芳导师：王国生、汤克敏（湖南大学土木工程系４１００８２）本文对化学混凝、ＣｌＯ２化学氧化、ＴｉＯ２光催化氧化、活性炭吸附、反渗透五种处理方法的净化机理用于城市垃圾填埋场渗滤液处理的适宜...     

有限体积法在固体废弃物填埋场渗滤液渗流模型中的应用

基于固体废弃物各种工程性质,提出用土壤水动力学原理来模拟渗滤液的流动规律。建立了以显式格式和有限体积法(FVM)为基础的二维饱和-非饱和渗流模型,并运用于深圳市下坪固体废弃物填埋场内部渗流场的计算。根据计算出的渗流场等值线图,证明模型是合理有效的,有限体积法运用于地下水运动的数值模拟仍然是一种高解析度的数值方法。     

填埋场渗滤液水位对填埋气收集的影响研究

为研究我国填埋场中气体运移规律建立了考虑我国城市固废组分特点的填埋场液-气运移耦合模型,应用此模型对西安江村沟填埋场现场抽气试验进行模拟分析。结果表明:抽气竖井影响半径随饱和度升高明显缩小;抽气竖井影响范围随堆体水位下降而显著提高,降低堆体水位可显著提高填埋气收集效率。根据分析结果建议对于典型高厨余固废含量填埋场,在设计抽气竖井间距时应考虑高厨余垃圾组分特点及降解规律,并且采取相应措施对填埋场中渗滤液水位进行控制,以提高填埋气收集效率。     

城市垃圾填埋场渗滤液生物处理技术

城市垃圾填埋场渗滤液污染浓度极高,持续时间长,若不加处理而直接排放,会造成严重的环境污染.分析了渗滤液处理工艺的现状,并结合国内外的工程实例,重点阐述了渗滤液生物处理技术.     

Enhancing waste decomposition and methane production in simulated landfill using combined anaerobic reactors.

The design of leachate recirculation to enhance municipal solid waste decomposition, methane production and microbial activities was taken into account in this study by using the combined anaerobic reactors of a simulated high organic content landfill reactor and a stabilized fixed film anaerobic reactor. The latter aimed to treat high strength leachate from the simulated landfill reactor before recirculation back to the former reactor. The results showed the possibility to apply this technique to high organic waste landfill where rapid and accumulative acids formed in the leachate were removed and treated by a fixed film anaerobic reactor. In addition, the treated leachate when circulated back to the simulated bioreactor landfill helps accelerate waste decomposition and methane production by providing buffer capacity as well as diluting organic content in the leachate to achieve the favourable conditions for acidogen and methanogen, respectively, to rapidly enter into the methanogenesis phase.     

成层介质中渗滤液最大饱和深度的简易解法

基于McEnroe给出的衬里上排水层饱和深度的解析解,分析了垃圾填埋场衬里上渗滤液最大饱和深度和设计参数入流量、排水层渗透系数和衬里坡度之间的函数关系;给出了渗滤液最大饱和深度及其在衬里上出现位置之间的关系,分析了衬里坡度对最大饱和深度出现位置的影响。在此基础上给出了在成层介质中适用于扩展Dupuit假定的一种简化计算渗滤液最大饱和深度的方法。算例结果表明该方法简单,便于在工程中使用。     

垃圾渗滤液的处理现状及新技术分析

介绍了垃圾渗滤液的来源及渗滤液的总体性质,总结了国内外垃圾渗滤液处理的常用工艺,并进行了性能比较,对不同工艺在处理过程中存在的问题进行了分析;针对我国垃圾渗滤液的实际情况,对未来的研究方向进行了展望.     

Treatment of high strength wastewater with vertical flow constructed wetland filters.

The aim of the present study was to evaluate the behaviour of vertical flow constructed wetlands to treat high strength wastewater. Influents were obtained mixing tap water with different percentages of MSW landfill leachate (5%, 10% and 20%). Phragmites australis seedlings were used as macrophytes. The reeds were nurtured during three spring months, before the start of the experimental period. Three and four days of detention time were adopted. Influent concentrations of 510-2,050 mg L(-1), 180-740 mg L(-1) and 65-260 mg L(-1) were obtained for COD, N-NH4(+) and N-NO3(-), respectively. The environmental temperature averaged around 31.0 +/- 1.4 degrees C. During the experimental period, all parameters showed an increasing removal efficiency trend. Best results in terms of COD removal were obtained for mixtures at lowest rate of landfill leachate; while, denitrification process showed an opposite behaviour; finally, the removal of ammonia nitrogen appeared to be independent upon influent concentrations. Analysis carried out on the reed tissues showed a theoretic maximum storage of TKN in the leaves of about 55 mg/g dry weight. A leachate percentage of about 35% was derived to be able to fully inhibit the growth of macrophytes.     

Acidogenic fermentation of municipal solid waste and its application to bio-electricity production via microbial fuel cells (MfCs)

Acidogenic fermentation of organic municipal solid waste (MSW) and the bio-electricity production potential from its volatile fatty acid (VFA)-rich leachate using an air-cathode microbial fuel cell (MFC) was investigated in this study. The acidogenic fermentation of 2 kg of MSW has been carried out in a 6 L anaerobic leach-bed reactor (LBR) under mesophilic conditions (30 degrees C). Total production of 92 g VFA expressed as chemical oxygen demand (COD) in 3 L leachate mainly containing acetic, propionic, butyric, and valeric acids has been achieved with manual leachate recirculation and without pH control in 74 days of incubation. Leachate collected on day 32 was used as a feed to an air-cathode MFC after being diluted and supplemented with NaCl or NaHCO3. The maximum power density in the diluted leachate was only 5.9 W/m3, but reached up to 8.6 W/m3 upon the addition of 7 mmol/L NaCl. Increase in coulombic efficiency from 6 to 22% was also observed as a result of NaCl supplementation. On the other hand, NaHCO3 addition did not improve the power output.     

城市垃圾卫生填埋场渗滤液处理综述

结合工程实际和实验研究,针对垃圾卫生填埋场技术背景及垃圾渗滤液的特点和影响因素,介绍了垃圾处理的3种方法,物化法、生物法和土地处理法,为今后的研究提出了建议。