海宁市生活垃圾卫生填埋场工程设计方案

介绍了浙江省海宁市袁花卫生填埋场工程概况及主要设计内容。针对场址为一废弃采石矿坑的特点,设计中对场内垃圾运输方式、库区防渗、气体导排等提出了合理可行的工程方案。     

The effects of reduction of the deposited waste on short‐term landfill leachate composition of a landfill: a case study in Norway

Municipal solid waste landfill leachate was sampled over from a landfill receiving varying amounts of municipal solid waste. The investigation aimed to provide information on expected leachate changes in the short term, either after closure of an active landfill, or after a strong decline in the amount of waste deposited at smaller landfills. It was found that during a two year period following a sudden decline in the amount of waste deposited, the levels of various chemical and physical parameters all dropped sharply. The reasons for the decline in discharge levels are thought to be aerobic decomposition taking place in the municipal solid waste just after landfilling, and thus the decline in the impact of this process when there were less fresh waste masses available, and formation of preferential flow paths for the leachate as the municipal solid waste stabilized in the landfill.     

Combined γ-ray irradiation-activated sludge treatment of humic acid solution from landfill leachate

Humic acid, which is a typical microbially refractory organic substance, was extracted from a landfill leachate. The humic acid solution (COD = 367 mg 1⁻¹; TOC = 293 mg 1⁻¹; BOD = 27 mg 1⁻¹) was applied to a batch scale activated sludge treatment after the modification of its biodegradability by γ-ray irradiation. The BOD increased to 64 mg 1⁻¹ by irradiation of 15 kGy (1.5 Mrad), while the COD and TOC decreased to 231 and 230 mg 1⁻¹, respectively. When the irradiated sample was treated with an activated sludge, the BOD decreased rapidly in 2–3 h to about 15 mg 1⁻¹ which was a similar value as the unirradiated sample was treated. The elimination efficiency of TOC by the sludge treatment was approximately equal to that obtained by irradiation of 15 kGy. These facts suggest a utility of applying microbial processes after radiation treatment of microbially refractory wastewaters.     

宁波大岙垃圾卫生填埋场填埋气的综合利用

介绍了宁波大岙垃圾卫生填埋场在填埋气产生量估算的基础上,开发填埋气燃烧系统、填埋气砖厂利用项目、填埋气燃烧发电项目,实现了节能减排与综合利用。     

垃圾填埋场设计中的稳定分析问题

随着现代文明的飞速发展,废弃物排放量的大幅增长向以保护环境为手段的人类社会可持续发展发出了挑战。合理、安全地运用填埋手段处置城市废弃物成为关注的焦点。介绍了填埋场设计中所涉及的稳定问题并进行了初步分类。对各种稳定破坏模式进行了分析,给出了接触面处废弃物的稳定系数的简易计算方法,以指导填埋场设计中对稳定问题的分析计算。     

垃圾焚烧飞灰预处理后水泥固化实验研究

为实现焚烧飞灰的无害化和资源化,采用对飞灰进行预处理后再与水泥混合固化的方法来处理飞灰,并比较了不同方式的处理效果:(1)用去离子水润湿飞灰再厌氧堆放24h后用水泥固化;(2)用绿矾溶液处理后再用水泥固化;(3)飞灰直接与水泥混合固化。研究3种方式所得水泥固化砌块试件强度的发展和控制重金属浸出的效果与直接固化物的对比,研究结果表明:在飞灰与水泥的质量比相同的条件下,采用先用绿矾处理飞灰再进行固化的处理方式,不但稳定重金属的效果好,而且试件强度最高,有望加以应用。     

垃圾渗滤液污染治理技术研究进展

分析了垃圾渗滤液污染治理技术的现状,总结了国内外各种渗滤液处理工艺的特点及处理效果.阐述了垃圾渗滤液处理治理技术的发展方向.垃圾渗滤液处理方向将逐步由传统、宏观的对COD、BOD的处理转向渗滤液的介观性质的研究,以寻找出渗滤液污染的根本原因,从而彻底解决渗滤液的污染问题.     

陕西省某生活垃圾卫生填埋场泄洪沟设计分析

西北地区山谷形垃圾填埋场一般具有汇水面积大、土质疏松、易发生山体垮塌等特点,因而需进行降水拦截导排。以实际工程设计为基点,结合当地条件进行了基本参数的选取、断面比选、出口形式选择、消力区段设计计算等。针对场区地形高差大、坡度陡实际情况,给出了陡坡段消力设计计算的一般方法。     

鸟粪石结晶法前处理垃圾渗滤液

垃圾渗滤液是一种高有机浓度、高氨氮含量的废水,用鸟粪石结晶沉淀法对苏州某垃圾填埋场的垃圾渗滤液进行前处理。当反应pH值在8.5～11.0,n(Mg2 )∶n(NH4 )∶n(PO43-)为1∶1∶1时,氨氮的去除率为91.5%～97.0%;控制反应pH值为9.5,n(Mg2 )∶n(NH4 )∶n(PO43-)为1.25∶1∶1.1,氨氮的去除率可达97.7%,同时对COD去除率达到65.9%,渗滤液UV260/COD从8.7×10-4降至6.3×10-4,可生化性有了较大的改善。     

垃圾卫生填埋场渗滤液组合处理工艺设计与调试

针对垃圾渗滤液水质变化较大的特点,采用铁床、铁床沉淀池、超声脱氨氮、UASB反应塔、PSB（光合细菌）反应池、水解酸化池、SBR反应塔、沉淀滤池工艺处理垃圾渗滤液,运行结果表明,该工艺对水质变化具有很强的适应能力,出水水质优于〈生活垃圾填埋污染控制标准〉（GB 16889-1997）的二级排放标准.介绍了该渗滤液处理系统的组成、重要构筑物及其设计参数、工程调试运行和经济分析等情况,总结了该工艺的设计特点.