活性污泥数学模型中进水易降解有机物的测定

ASM系列模型 (ASMs)自推出以来在欧美得到广泛应用。要想利用ASMs对特定污水处理过程进行准确的模拟 ,首先必须得到该过程污水的水质特性参数。介绍了连续式OUR计量法、序批式OUR计量法和絮凝过滤物理化学法等 3种测定ASMs中进水易降解有机物的方法 ,通过分析比较指出了各自的优缺点及适用情况。     

生物作用强化城市污水一级处理工艺研究

提出生物作用强化城市污水一级处理工艺 ,探讨利用生物絮凝吸附作用独立承担城市污水处理任务的可行性、影响因素及运行参数。试验证明 ,处理城市污水 ,当HRT为 1 1h ,DO为 1 0mg L ,CODCr污泥负荷为 3 4～ 4 0kg kg·d时 ,CODCr、BOD5和SS去除率分别为 6 8%～ 78%、6 5 %～ 72 %和 75 %～ 85 %。     

2-Chlorophenol oxidation kinetic by photo-assisted Fenton process

Experimental data are presented to test and validate a kinetic model for the oxidation of 2-chlorophenol wastewater by photo-assisted Fenton process. The data showed that this process had produced good effects under acidic conductions. Up to 90% 2-chlorophenol was removed after 90-minute reaction time with H2O2 of 25% CODCr. in, while in UV/H2O2 system ordy 16.8% 2-chlorophenol was removed after one hour treatment. The optimal pH in this reaction occurred between pH 3.0 and pH 4.0. The reaction kinetics for photo-assisted Fenton process experimented in this research was investigated. Kinetic models were proposed for the treatment of 2-chlorophenol wastewater. The reaction was found to follow the 2nd order. The equations of reaction kinetics are as follows:-d[RH]/dt=KRH[RH][H2O2]0exp(-KH2o2t);-d[CODCr]/dt=KCODCr[CODCr][H2O2]0exp(-K′t).The prediction of the models was found to be in a good agreement with experimental results, thus confimfing the proposed reaction mechanism.     

废旧家电产品回收性能评价指标体系的建立

针对家电产品回收工艺流程决策评价的多阶段、多目标的特点,以及不同类型家电产品和不同回收工艺过程的动态特性,采用层次分类方法建立了以经济指标和环境指标为主要内容的回收工艺流程评价指标体系,对指标体系的组成进行了较为详细的分析,讨论了应该考虑的因素及有关计算方法。以电冰箱为例,用改进的模糊层次分析法与遗传算法相结合,介绍了回收工艺流程的优化决策方法。建立的指标体系不仅可以根据评价对象进行动态修改,而且具有较强的可操作性。     

Catalytic dechlorination of chlorobenzene in water by Pd/Fe bimetallic system

IntroductionChlorinatedorganiccompoundshavebeenusedonalargescaleinthechemical,petrochemical,andelectronicindustries.Inrecentyears ,worldwideattentionhasbeengiventotheenvironmentalandhealthimpactofthemasaclassofcontaminants .Severalareknowntocauseozonedepletion ,whileothersproduceadverseeffectsonthehumancentralnervoussystemandhavebeenlinkedtodiseasessuchascancer.Almostallofthechlorinatedaromaticcompoundsaretoxicandthermallystable .Oncereleasedintoenvironment,theywillaccumulateinthesurroundings…     

Catalysts for decomposing ozone tail gas

The preparation of immobilizing-catalysts for decomposing ozone by using dipping method was studied. XRD, XPS and TEM were used to characterize the catalysts. The three kinds of catalysts were selected preferentially, and their catalytic activities were investigated. The results showed that the catalyst with activated carbon dipping acetate( active components are Mn:Cu = 3:2, active component proportion in catalyst is 15%, calcination temperature is 200℃ ) has the best catalytic activity for ozone decomposing. One gram of catalyst can decompose 17.6g ozone at initial ozone concentration of 2.5g/m^3 and the residence time in reactor of 0.1s. The experimental results also indicated that humidity of reaction system had negative effect on catalytic activity.     

水解-接触氧化工艺处理高浓度米果废水

采用水解—接触氧化—沉淀工艺处理高浓度米果废水，设计规模为100m^3／d。处理后的CODcr，BOD5，SS和色度的去除率分别达到96．8％，97．7％，94.4％，94．7％，总排放口水质为：pH=7．61，CODcr=70．7mg／L，BOD5mg／L，SS=29．2mg／L；色度的稀释倍数为8。     

武夷山国家级风景名胜区的游憩价值评估

采用收益资本化的方法，对武夷山国家级风景名胜区进行游憩价值的经济评估，从定量的角度确定该景区的开发潜力，从而更清楚地认识到良好的生态环境具有较高的环境价值，为该地区的旅游规划与管理提供科学的参考。     

粉煤灰、硫铁矿渣制备聚铁铝硅混凝剂及应用研究

采用粉煤灰、硫铁矿渣为原料 ,设计出一条新的工艺流程制备新型无机高分子絮凝剂聚铁铝硅盐 (PAFCSi)。通过其形态分布的研究和对模拟水样的处理得到了产品的最优性能指标。对两种废水的处理结果表明产品的混凝效果明显优于市售混凝剂聚铝 (PAC)和聚铁 (PFC)。     

城市生活垃圾无害化处理工艺

根据武汉市金口、郭茨口两个垃圾处理场情况 ,分析了城市生活垃圾处理现状及其危害 ,阐述了生活垃圾无害化处理工艺 ,提出生活垃圾无害化处理不仅可以实现资源的持续利用 ,而且奠定了城市可持续发展的基础