湛江冯村垃圾场对中深层承压水污染的可能性及其防治

根据湛江冯村垃圾场所处的原生及次生地质环境条件,采用水文地质学及地下水动力学的理论与方法,对冯村垃圾场潜在污染中深层承压水的可能性、危害性及防治对策进行初步探讨。结果表明:冯村垃圾场建于地下水循环系统的补给区,地形切割强烈,包气带自净能力差,浅层潜水与中深层承压水之间的水头差较大,存在污染中深层承压水的可能性。建议贯彻以防为主、防治结合的原则,禁止在冯村一带再建垃圾填埋场,并设立防治分区,建立动态监测网络系统及地下水管理模型。     

某垃圾填埋场污泥坑外涌及其引发下游堆体失稳机理

中国许多垃圾填埋场接纳高含水率的市政污水污泥，对填埋场运营构成了严重安全隐患。介绍某填埋场污泥坑上堆填垃圾过程中引发污泥外涌及下游堆体失稳事故，根据填埋场失稳破坏现象及事故前后下游堆体边坡中渗滤液水位和顺坡向位移监测结果，对堆体失稳的力学机理及失稳过程进行反分析。现场监测数据与堆体失稳分析结果表明：在未加固处理的污泥坑上堆填垃圾会显著降低下游垃圾堆体的稳定性。其力学机理：①流态状污泥将上覆垃圾荷载等量转化为对周围垃圾体的侧压力（对下游垃圾堆体为下推力）；②污泥受压挤渗入周边垃圾和衬垫系统中导致堆体抗剪强度降低。垃圾堆体中高液气压力是造成堆体失稳的重要内因，降低堆体中渗滤液水位可显著提高污泥坑下游堆体的稳定性，有效控制失稳堆体继续滑移。污泥坑加固处理后再堆填垃圾，可显著降低发生失稳和污泥外涌的风险。     

抗裂纤维及膨胀剂在大型刚性危废填埋坑中的应用

某危险废物处理工程的刚性填埋坑尺寸为138m×60m×12.5m,为防止池体渗漏造成环境污染,该大型钢筋混凝土池体的超长抗裂采用了掺加膨胀剂和抗裂纤维的"双掺"补偿收缩混凝土技术,通过合理设计和施工控制,实现了超长池体的抗裂防渗目标。     

聚酯纺粘土工布在垃圾卫生填埋场水平防渗结构中的作用

主要比较了聚酯长丝纺粘土工布和短纤针刺土工布在垃圾卫生填埋场建设中的特点和作用，阐述了土工布施工过程中需要注意的一些问题。     

Influence of various parameters on the electrochemical treatment of landfill leachates

The influence of some basic parameters of an electrolytic system on the effectiveness of the treatment of landfill leachates is investigated. The controlling parameters of the system examined were: (i) the leachate input rate, (ii) pH and temperature, (iii) the amount of electrolyte (NaCl) added, (iv) the voltage applied and (v) the concentration of Fe²⁺ (added as FeSO₄ · 7H₂O). The performance of the system was assessed in terms of the COD, BOD₅ and NH₄ ⁺ reduction in the leachate samples as well as in terms of the energy consumption of the system (i.e., kWh consumed per kg of COD removed). These two parameters are referred to as the optimization parameters of the system. By implementing a 2⁶ factorial experiment, linear models, which interrelate each optimization parameter with the controlling parameters of the system, were generated. Using these models, effective treatment of landfill leachates by electrochemical oxidation can be designed.     

混凝吸附一两段SBR法处理垃圾渗滤液

利用赤泥制备复合混凝剂PAFCS（聚合硫酸氯化铝铁）并以炉渣作为吸附剂对垃圾渗滤液进行预处理，对SS和色度的去除率分别为84％和92％，对COD的去除率可达53．3％，还提高了渗滤液的可生化性。然后采用两段SBR法对垃圾渗滤液进行生化处理，结果显示：通过对降解COD和氨氮的两类微生物分别进行培养，保持了较高的生物活性，进而提高了对此类高浓度难降解废水的处理效率。通过两段SBR处理以后，COD、BOD和氨氮的去除率分别为88％、94％和89％，出水水质达到了国家《生活垃圾填埋污染控制标准》（GB 16889—1997）的二级标准。     

Optimization of municipal solid waste (MSW) disposal in Saudi Arabia

Municipal solid waste (MSW) mainly comprises organics, paper, glass, plastics, metals, wood, etc. Rapid industrialization, high population growth rate, and fast urbanization have resulted in increased levels of pollution and MSW in Saudi Arabia. The amount of waste has been steadily increasing due to increasing human population and urbanization. Recovery refers to materials removed from the waste stream for the purpose of recycling and/or composting. There are various options available to convert solid waste to energy. Mainly, the following types of technologies are available: (1) sanitary landfill, (2) incineration, (3) pyrolysis, (4) gasification, and (5) anaerobic digestion. An integrated MSW disposal policy comprises (1) reduction of MSW source, (2) reuse of MSW, (3) recycling of MSW, (4) landfill and gas-to-energy conversion, and (5) MSW-to-energy conversion. Traditionally, MSWs have been disposed in landfills. Landfill is the most inexpensive waste disposal option. The main MSW disposal policies and barriers have been concluded in this study.     

我国垃圾填埋场填埋气体排放和回收利用现状分析

城市生活垃圾填埋气体的回收和资源化利用是一项经济可行且对环境有益的技术。本文介绍了我国目前垃圾填埋气体产生、排放及利用情况,分析了几种填埋气体利用技术的特点及其在我国的适用性,并提出了未来我国城市生活垃圾处理的主要方向,即建立配备填埋气体回收装置的卫生填埋场。     

娄底市城市卫生填埋场不良地质灌浆处理技术

对填埋场区内不良地质进行了分析研究,提出了灌浆处理的方法,采用综合灌浆技术处理了场区下溶洞、断层和采空区,实践表明,地基的灌浆处理达到了预期的效果,解决了填埋场基础稳定的问题。     

兰州某垃圾填埋场场地岩土工程条件评价及防渗处理方案建议

通过对垃圾填埋场场地岩土工程条件的分析,对垃圾填埋场拟采用的防渗方案进行了比选,提出了粘土铺盖加HDPE（高密度聚乙稀）防渗膜的综合防渗方案,对同类工程防渗设计具有参考意义。