从厌氧生物膜反应器、异养一好氧生物膜反应器和硝化生物膜反应器三方面，全面考察了进水底物浓度（So）对生物膜反应器稳态出水水质（So）的影响，发现Se随So的变化呈现半U形曲线。在传统的线性模型基础上，提出了非线性Se-So的模型，该模型能很好地定量描述试验所得数据，并从文献中的数据得到了进一步的验证。所提出的临界进水底物浓度的概念在实际生物膜反应器设计及运行中，具有重要应用意义。

为了有效地去除垃圾渗滤液中高浓度的NH+4-2N而避免传统吹脱法造成吹脱塔内的碳酸盐结垢问题，探讨了采用化学药剂诸如MgCl2·6H2O和Na2HPO4·12H2O或MgO和H3PO4使NH+42N生成磷酸铵镁的化学沉淀去除法。小试研究结果表明，当垃圾渗滤液中投加MgCl2·6H2O和Na2HPO4·12H2O而使Mg2+：NH+4：PO3-4的比例为1:1:1时，在最佳pH为815～910的条件下原垃圾液中的NH+42N可由5618mg/L降低到65mg/L；另外2种药剂MgO和85%的H3PO4不如前者有效，在同等条件下只能使NH+42N由5404mg/L降低到1688mg/L.

在哈尔滨某地建立了室外模拟垃圾填埋场,进行了渗滤液回灌与不回灌的跟踪监测研究。结果表明：回灌能减量87. 05%的渗滤液，明显改善渗滤液水质（显著降低COD、SS、NH4+-N浓度，提高pH值），降低渗滤液处理难度。

为了深入考察高温/中温两相厌氧消化反应器系统用以处理混合基质（分别同时处理污泥与其他高浓度有机废物)时有机酸的变化特性，采用蒸馏一滴定法测定挥发有机酸总量，并在系统达到相对稳定时用色质联机确定有机酸的组成及各自含量。研究结果表明，混合基质经高温消化后挥发有机酸含量有所增加，平均在3346-5529mg/L，进一步经中温消化且系统达到稳定后其含量平均为43-433mg/L；乙酸、丙酸、丁酸和戊酸是进料混合基质和高温消化后基质中主要的有机酸种类。

传统的活性污泥工艺中加入废弃轮胎颗粒作为生物膜载体形成的复合式生物膜反应器，在颗粒浓度为40g/L时，稳定运行条件下在轮胎颗粒表面可形成约50mg/g的生物膜量，即在传统曝气池的2000～3000mg/L悬浮生长污泥的基础上，可增加2000mg/L的附着生物膜量。此时生物膜的厚度为255Lm，其活性以比耗氧速率（SOUR）表示为40～70mg/g·h。

Leachates generated in Hong Kong landfill sites contain high strength of ammonium-nitrogen (NH4+-N) in the range of 2000[1]/5000mg l-1, which could be used to produce nitrogen-fertilizer. To recover the NH4+-N from the leachate, alab-scale study was performed to investigate the efficiency of magnesium ammonium phosphate (MAP) precipitationusing three combinations of chemicals: MgCl2

Leachate samples were collected from the West New Territory Landfill (WENT), Hong Kong, and characterized in the laboratory. The analytical results confirmed that it has a typical nature ofaged leachate with a low BOD5/COD ratio Of O.22 and a high strength of ammonia-nitrogen around 5G/L. A lab-scale study was conducted to investigate the inhibition of microbial activity of the activated sludge. In the first test. glucose-based synthetic wastewater Was used in two parallel reactors. The experimental results demonstrated that COD removal declined from 95.1 to 79.1% activated sludge. In the first test. glucose-based synthetic wastewater Was used in two parallel reactors. The experimental results demonstrated that COD removal declined from 95.1 to 79.1% activated sludge. In the first test. glucose-based synthetic wastewater Was used in two parallel reactors. The experimental results demonstrated that COD removal declined from 95.1 to 79.1% and the dehydrogenase activity of the sludge decreased from 11.04 to 4.22μg TF/mg mixed Iiquor suspended solids (MLSS), when the ammonia-nitrogen concentration increased from 50mg/L to 800mg/L progressively. The remaining NH3+-N residue in the treated wastewater increased from 0.58mg/L to 649mg/L extensively. In the second test. mixed wastewater samples containing glucose and raw leachate were fed into six parallel biological reactors and operated on batch mode. The experimental results showed COD removal decreased from 97.7 to 78.1% and the dehydrogenase activity decreased from 9.29 to 4.93μg triphenyl formazon (TF)/mg MLSS, respectively. when the ammonia-nitrogen concentration increased within the same range. Mierobial inhibition could alSO be substantiated by a decrease of specific oxygen uptake rate (SOUR) from 68 to 45mg O2/g MLSS. These results suggested leachate containing high-strength ammonia-nitrogen should be pretreated to art acceptable NH4+-N level before it is fed into biological reactors.

The landfill leachate in Hong Kong usually contains quite high NH4+-N concentration, which is well known to inhibit nitrifica-tion in biological treatment processes. A common pre-treatment for reducing high strength of ammonium (NH4+-N) is by an air-stripping process. However, there are some operational problems such as carbonate scaling in the process of stripping. For this reason, some technical alternatives for NH4+-N removal from leachate need to be studied. In this study, a bench-scale experiment was initiated to investigate the feasibility of selectively precipitating NH4 +

研究了高温/中温两相厌氧消化反应器系统用以同时处理污泥与不同高浓度有机废物时产气及产甲烷的变化特性。结果表明，气体及甲烷主要是在第二段的中温消化反应器内产生。当中温消化反应器的有机负荷VS为1.65～3.10kg/m3d时，稳态条件下的平均产气量为1.958～4.020m3/d，气体中甲烷的平均组成为65%～73%，甲烷的比产率为0.397～O.511m3/kgVS。

高温/中温两相厌氧消化工艺，用于同时处理城市污水厂污泥和其它高浓度有机废物是一个崭新的课题，特别是将高温水解产酸相反应器的温度提高到75℃、水力停留时间控制在2.5d更是一种新的尝试。本课题源于生产实际需要而开展中试规模试验研究，目的在于考察高温/中温（75℃、2．5d/37℃、10d）两相厌氧消化反应器系统，分别同时处理污水厂污泥与主要含碳水化合物的废物（马铃薯加工废物）、污泥与主要含蛋白质的废物（猪血）污泥与主要含脂类废物（灌肠加工废物）时的效能变化，为拟建实际规模高温/中温两相厌氧消化系统提供技术依据。