生化-调碱后垃圾渗滤液的Fenton深度处理效果

针对上海老港垃圾填埋场经过厌氧-曝气塘处理后的渗滤液难进一步处理的问题,对其采用厌氧滤池-好氧接触法、氧化钙2种方式预处理,在此预处理基础上,考察了Fenton法深度处理的效果,探讨了H2O2/Fe2+投加比、初始pH、H2O2投加量、反应时间和Fenton试剂投加方式对渗滤液COD去除效果的影响。研究发现:经过生物预处理后,渗滤液的COD和TP分别降低了24%和25%;氧化钙调碱可以进一步使COD和TP去除率分别达到42%和96%;后续Fenton深度氧化的最佳条件为:初始pH为2,H2O2投加量为2.4 g/L,H2O2/Fe2+摩尔比为5∶1,Fenton试剂一次投加,反应时间为2 h。在此条件下,渗滤液的COD从1 340 mg/L降到198 mg/L,总COD去除率达到85%。     

城市垃圾处理的新动向——生物反应器填埋场技术

基于传统垃圾卫生填埋场的不足，介绍了生物反应器填埋场及其对垃圾和渗滤液中污染物的有效去除和阻滞机理，总结了生物反应器填埋场降低渗滤液污染强度、增加填埋场有效容积、提高产气量、加速填埋声稳定、降低垃圾处置成本等优势，概括了生物反应器填埋场设计和操作支行要素，提出了今后的发展方向。     

Landfill Leachate Ecotoxicity Experiments using Lemna minor

The effects of varying concentrations of landfill leachate on the growth, frond area, chlorophyll content and fluorescence of four strains of Lemna minor were assessed. Growth fluorescence and frond chlorophyll content decreased after seven days exposure to leachate, although responses differed between the strains and end parameters. A L. minor bioassay was used to assess leachate toxicity and the effectiveness of a constructed wetland treatment system and pre-treatment aeration and settlement in reducing toxicity. Pre-treatments were found to significantly reduce toxicity, so their incorporation in any treatment system may increase pollutant stripping.     

生活垃圾堆填区周边土壤的性状变化及其污染状况

对北京西郊某垃圾堆放场周边土壤的污染状况进行了分析研究。结果表明，受垃圾渗滤液的浸蚀影响，垃圾区周围土壤酸性增大，养分含量增高；垃圾区土壤的重金属含量明显高于对照区土壤，表明垃圾区周围土壤已受到渗滤液的重金属污染，土壤性状发生明显变化。     

150t/d循环流化床生活垃圾焚烧炉的工艺结构与污染排放

垃圾焚烧处理技术在我国的应用越来越广泛 ,单纯引进国外的垃圾焚烧处理技术已经无法满足我国经济发展的需要。清华大学自主开发研制的 15 0t/d循环流化床生活垃圾焚烧炉已经通过专家鉴定 ,各项焚烧污染物排放指标均达到或优于国家标准 ,总体水平居国内领先水平。本文详细介绍了该焚烧炉的系统及结构 ,并对有关控制污染物排放的技术手段进行了详细分析     

High nitrite accumulation and strengthening denitrification for old-age landfill leachate treatment using an autocontrol two-stage hybrid process

An autocontrol two-stage hybrid process was developed to treat landfill leachate. Biological nitrogen removal with nitrification and denitrification via nitrite pathway was split into two stages. The first stage was designed for the high nitrite accumulation and was composed of two hybrid bed reactors (Hybrid I and Hybrid II) and a coagulation–flocculation reactor having effective volumes of 120 L and 80 L, respectively. The second stage was designed for strengthening denitrification and included a single 80 L reactor. The carriers of the hybrid bed reactors were composed of fixed multiple flexible carriers and suspended particle carriers. Dissolved oxygen (DO), pH value, oxidation–reduction potential (ORP) and temperature were used as online fuzzy control parameters of the automatic control system. The concentration of nitrite in Hybrid I and Hybrid II could reach 411 mg L⁻¹ and 604 mg L⁻¹, respectively. Ammonia removal has reached maximal rates of 0.061 kgNH₄⁺-N (m³ h)⁻¹ and 0.041 kgNH₄⁺-N (m³ h)⁻¹, respectively. A maximum nitrite removal rate of 0.211 kgNO₂⁻-N (m³ h)⁻¹ was observed during the strengthening denitrification. The running time of one cycle was not fixed and was actually controlled by the system. The results indicated that the running period was more closely related to influent ammonia concentration than influent COD concentration. The aeration times could be shortened and the energy could be saved. The autocontrol two-stage hybrid process is therefore an economical and effective way for landfill leachate treatment.     

城市生活垃圾渗滤液土地处理的模拟研究

通过静态与动态试验以及小试，从5种土壤中筛选出适合重庆地区垃圾渗滤液土地处理的基质土壤，确定了土地渗滤和芦苇湿地等两组土地处理系统净化城市垃圾渗滤液的有关参数，模拟处理结果表明垃圾渗滤液经两级土地处理后，春氨氮和CODcr的去除率均达到90%以上，出水水质达到国家一级排放标准。     

湿解焚烧综合处理垃圾技术的原理及应用

详细介绍了湿解焚烧处理生活垃圾技术的原理和其在武汉经济技术开发区的具体应用,并简述了其在一段时间的调试和运行后表现出的优点.为国内未来垃圾气化熔融焚烧技术的推广提供了参考.     

兴建垃圾电厂的基本原则

垃圾电厂是一种新兴的发电形式。根据垃圾电厂的特殊性和公益性原则，结合广东省的实例进行具体分析。兴建垃圾电厂与常规发电厂所遵循原则的区别主要体现在厂址选择、设备选择和工程造价等几方面，同时还应遵循国家环境保护标准，使垃圾电厂保持良性发展，争取达到经济效益与环境效益的统一。     

Fenton法预处理垃圾渗滤液膜滤浓缩液的研究

采用Fenton法对垃圾渗滤液膜滤浓缩液进行预处理,探讨了pH值、FeSO4/H2O2用量及比例、以及反应时间对CODcr及色度去除率的影响.研究结果表明:当pH =4.0,FeSO4/H2O2用量0.75/7.5 (g/ml),反应时间2.5h,垃圾渗滤液膜滤浓缩液的CODcr浓度从4 416 mg/L降低至630.7 ml/L,CODcr去除率达85.7％;色度从1 250倍降低至200倍以下,色度去除率达84％.因此,本工艺对垃圾渗滤液膜滤浓缩液的CODcr及色度具有较好的去除效果,作为垃圾渗滤液膜滤浓缩液的预处理工艺具有可行性.