山谷型垃圾填埋场渗滤液场内收集管网系统的设计计算方法研究

以苏州七子山垃圾填埋场为背景，采用理论分析的方法，探讨山谷型垃圾填埋场合理的渗滤液收集系统的形式和定量计算方法。     

天津市双口生活垃圾卫生填埋场渗沥液处理

介绍了天津市双口生活垃圾卫生填埋场渗沥液处理情况，对渗沥液处理场运行中出现的一些现象做了初步分析。     

城市垃圾填埋场渗滤液土地处理的可行性

通过对垃圾填埋场渗滤液形成的分析，提出了减少渗滤液产生的措施。目前渗滤液处理技术存在不足之处，根据渗滤液形成量与质的变化特点，结合西部生态环境建设的任务，采用慢速渗滤土地处理系统处理渗滤液是可行的。     

矿化垃圾生物反应床处理渗滤液的示范工程研究

介绍了上海老港垃圾填埋场三级矿化垃圾生物反应床处理渗滤液示范工程2 a来的运行情况,在短周期、多次喷灌配水的间歇运行方式下,对渗滤液处理效果好、水质适应性强.在50 t/d的配水量下,三级出水的NH3-N、TSS、BOD5、TP、色度、嗅味、重金属含量等污染指标均低于渗滤液二级排放标准,COD值在1 a 20%的时间里满足二级排放标准,75%的时间里排放浓度低于650 mg/L,全年可满足三级纳管排放标准.     

垃圾场污水对下游饮用水污染的调查报告

我们对成都市垃圾场渗出的污水影响下游水质情况进行调查发现：垃圾场污水主要造成下游河水的感官指标发生恶变，而沿岸的河边井由于土层的过滤作用使井水的感官指标基本达到饮用水卫生标准，但细菌学指标仍严重超标。本文提出应积极进行农村改水工作，加强饮水消毒，同时在建垃圾场时应考虑污水排入的河流本身的自净能力     

垃圾填埋场渗滤液重金属地球化学研究

综述了垃圾填埋场渗滤液重金属的研究现状,指出研究存在的问题,阐述了垃圾渗滤液重金属的地球化学特征、带来的危害,提出治理措施,并指明今后的研究方向。     

渗滤液中氨氮在土壤和地下水中迁移转化实验

通过模拟实验对渗滤液中的氨氮在土壤和地下水中的迁移转化进行了研究,从而得出渗滤液对土壤的影响程度和规律.     

山谷型垃圾填埋场谷口处防渗处理方法的探讨

探讨了帷幕灌浆与排水廓道相结合，对山谷型填埋场谷口片防渗处理的设计新方案，并介绍了设计原理、方法及使用效果。     

Effect of chlorhexidine digluconate on antimicrobial activity,cell viability and physicochemical properties of three endodontic sealers

ObjectiveAssess the biological and physicochemical properties of AH Plus, BioRoot RCS and Pulp Canal Sealer (PCS) leachates with and without chlorhexidine (CHX).MethodsThe sealers were studied in no contact and 1-minute contact with CHX. For biological properties (antibacterial activity and cytotoxicity), leachates were formed in saline of freshly mixed, 1-, 7- and 28 days set sealers. The antibacterial properties of sealer leachates were investigated for planktonic and biofilm growth of E. faecalis, S. mutans, S.epidermidis and S.aureus. The 3-(4,5 dimethylthiazolyl-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay was used to evaluate murine fibroblast cell viability after exposure to the leachates. The physical properties (water uptake, sorption, solubility, porosity, surface characteristics) of sealers and the pH of the immersion liquid (saline or distilled water) were also assessed over a 28-days period.ResultsCHX improved the antibacterial properties of the sealer leachates and reduced cell viability for all sealer leachates, except for freshly mixed PCS. BioRoot RCS leachates presented the highest antibacterial properties and cell viability with and without CHX contact. PCS was the material most affected by CHX in terms of physical properties, whereas for AH Plus, solubility was increased. CHX did not affect the physical properties of BioRoot RCS, except for solubility that was decreased. CHX contact did not change sealers’ alkalinity in distilled water whereas it increased it for AH Plus and BioRoot RCS in saline.SignificanceCHX improved the antibacterial efficacy of sealer leachates and either compromised or did not affect cell viability. CHX affected to various extent sealers’ physicochemical properties.     

乐山市城市生活垃圾收运系统及处理工程设计

介绍了乐山市城市生活垃圾收运系统及处理工程的设计情况。通过技术、经济比较,认为应重视城市垃圾收运和卫生填埋场建设,渗滤液经循环、初级处理后排入城市污水处理厂是较为有效的方法。