对分类收集的城市生活有机垃圾采用专门设计的兼氧沤解预液化一常温厌氧消化的工艺技术进行处理。试验结果显示，兼氧抠解对生活有机垃圾的预液具有较好的效果，液化率达80%以上，可以满足反应器对生活有机垃圾预处理的要求。

研究了在上海市老港垃圾填埋场17号填埋单元建造的3000m。小型卫生填埋场垃圾表面沉降规律。结果表明，表面沉降与垃圾的压实程度有关，在填埋过程中，垃圾被充分压实后，沉降就相对较小。在所监测的2.5年时间内，最大累计沉降大于1m，是垃圾填埋初始高度（4m）的25%。根据垃圾表面沉降的预测结果，讨论了老港垃圾填埋场的利用途径和可能性。

全面综述了垃圾组成、垃圾水分含量、垃圾坝处理与填埋操作方式、填埋场地水文气象条件，渗滤液pH值与氧化还原电位及微生物种群等填埋场稳定化的影响因素。

Refuse in the landfills and dumping sites becomes stabilized or aged over time. The aged refuse contaiu. a wide speetram and large quantity of micro-organisms, which can effectively decompose refractory or-ganic matter present in some wastewaters, such as MSW landfill leachate. In this study, a biofiltration reactor consisted of the aged refuse excavated from a 10-year-old closed landfill compartment in the Shang-hai Refuse Landfill (SRL) was used for biofiltration of livestock and poultry waste water sampled from a farm. Two hundred kilograms of screened aged refuse (diameter less than 15 ram) was used as bioffl-tmtion material in a cylindrical biofilter with a 40-cm inner diameter and a 150-era height. Around 50L/day (at a hydraulic load of 250L/m3 refuse/day) of the preliminary-treated influent livestock wast-waters with initial CODcr, BOD5, NH3-N. total phosphorus concentrations of 197-2,419, 102-.459, 260-1,140, and 24-102 mg/L, was intermittently sprayed over the refuse surface once a day with 3h per interval, The pollutant concentrations were reduced to below 185mg/L CODc, 15mg/L BOD5, 27mg/L NH3-N, and 0.5mg/L total phosphorus, with a removal of 64, 54, 75, 88, 94, and 99%, respectively. However, the removal of the total N is quite low, only around 20-30%. The NH3-N is mainly converted to ni-trate N. The removal of the total P is high, possibly because of the strong chemical absorption capacity of the aged refuse in the biofiltration reactor used. The effluent looks clear, in contrast to the brownish colol: of the influent. The treatment process developed is cost-effective and easily operated.

Refuse in landfills becomes stabilized or aged, as organic matter in the refuse gradually degrades and as the soluble inorganic substances dissolve during its long-term stabilization process. Within this paper, this process is referred to as mineralization and the resultant stabilized or essentially stabilized refuse is referred to as "aged refuse."The aged refuse contains a wide spectrum and large quantity of microorganisms, which have a strong decomposition capability for refractory organic matter present in some wastewaters, such as leachate. In this study, aged refuse excavated from two to ten year old closed landfill compartments in Shanghai Refuse Landfill (SRL) was characterized in terms of particulate distribution by screening, and a biofilter consisting of ten year old aged refuse was then used for biofiltration of leachate sampled from the landfill. Typically, 400 kg of screened aged refuse with limiting diameter less than 15 mm was used as biofiltration materials in a round shaped biofilter with 80 cm inner diameter and 80 cm height. Leachate with initial chemical oxygen demand (COD), biological oxygen demand (BOD), and NH3-N concentrations of 3,000-7,000, 540-1,500, and 500-800 mg/L, respectively, was passed through the biofilter. As a result, the corresponding concentrations in the effluent were reduced to lower than 100-350, 10-200, and 10-25 mg/L, respectively, 90-99% removal for these parameters at a hydraulic load of 80-200 L/m3 refuse/day. The color of the effluent became slightly gray, in comparison with the heavy brownish color of the influent. The treatment efficiencies heavily depend on hydraulic load, BOD/COD ratios in the leachate, and preliminary treatment of the aged refuse. A variety of leachates with various BOD/COD ratios was tested. It was found that the effluent deteriorated when BOD/COD ratios were lower than 0.1-0.2. Increase of hydraulic load resulted in a decrease of removal efficiencies. Removal of stone, plastics, and glass, etc., from the aged refuse improved the treatment. A pilot test was conducted at SRL and the experimental results obtained at laboratory scale were verified.