Pilot Study on Drinking Water Advanced Treatment by GAC-MF System

The pilot pedomance of the combined GAC-MF membrane process for drinking water advanced treatment was described. In the process of GAC adsorption, under the conditions of 20min HRT and 6 m/h filtration rate, the removal efficiencies of UV254 and trichloromethane could reach 40% and 50% respectively and the UV254 and trichloromethane in system effluent was less than 0.015cm^-1 and 5 μg/L respectively. Inthe post MF membrane process, MF membrane effectively retained the particles and bacteria in raw water. The effluentturbidity was less than 0.2 NTU and no bacteria were detectedat all in permeate. A computer-controlled system was employedto control this system. The mcmlrane operating parameters of backwash interval, dtration and flux were studied. The backwash interval of 10-min, 20-min and 60-min wasresearched respectively, and the variation of trans-membrane pressure was also analyzed. Comequently short backwash interval was recommended under the same water consume.     

高选择性重组菌在含Hg^2＋环境中的生长富集Hg^2＋耦合及其连续处理Hg^2＋废水

研究了在低营养含汞环境中，高选择性汞富集基因工程菌E．coli JM109(表达MerT、MerP汞特异结合转运蛋白和金属硫蛋白MT，该菌简称为M1)的生长富集耦合行为．考察了汞离子浓度、离子强度、络合物、共存金属离子等环境因素对其生长富集Hg^2 耦合行为的影响；并且利用连续操作搅拌槽式生物反应器，实现了对有机废水配伍的含汞废水的连续化处理。     

探讨土地整理中土方计算的应用

本文重点对土地整理中土方计算的几种方法进行探讨,并对不同方法的精度进行分析,提出解决办法。     

柴胡疏肝散加减治疗胆汁返流性胃炎80例疗效观察

目的:观察柴胡疏肝散加减治疗胆汁返流性胃炎的临床疗效.方法:本组80例胆汁返流性胃炎患者均服用柴胡疏肝散加减煎剂.结果:治愈65例,好转10例,无效5例,总有效率93.8%.结论:柴胡疏肝散加减治疗胆汁返流性胃炎,疗效确切,无副作用.     

GM-L65电控柴油机突加减速特性试验研究

介绍了GM-L65电控柴油机的性能及控制参数,阐述了柴油机的特性与车辆性能及变速器换档之间的联系.通过柴油机突加减速特性试验,分析了柴油机突加减速特性及相应的加速踏板位置传感器信号变化特性,为动力传动系统的一体化控制以及换档规律设计提供了依据.     

一株可利用硫化物的紫色硫细菌的分离与鉴定

我们从印染废水中分离获得一株可利用硫化物的紫色硫细菌菌株，经鉴定为洒色着色菌Ｃｈｒｏｍａｔｉｕｍｖｉｎｏｓｕｍ，。这在国内是一个新纪录。该菌株可氧化Ｈ＿２Ｓ，生成的硫粒贮存于细胞内。在有硫化物和碳酸氢盐同时存在时，可光同化很多种有机物质，具有在黑暗微好氧至好氧条件下进行化能自氧或化能异氧生长的能力。     

多量子阱波导的传输和色散特性

本文用Floquet理论分析了多量子阱(阱垒数N>>1)波导的传输和色散特性,给出了适用于TE和TM两种偏振态的等效三层平板波导芯子折射率的解析公式,该公式清楚地说明了多量子阱波导的本征双折射行为。