关于保障鞍山市城市饮水安全的研究及对策

本文在全面阐述鞍山市水资源现状的基础上,系统地分析了鞍山市供水系统存在的问题,并针对鞍山实际情况,提出了保障鞍山市城市饮水安全的相关研究及对策。     

Fluidised pellet bed bioreactor: a promising technology for onsite wastewater treatment and reuse.

A pilot-scale fluidised pellet bed (FPB) bioreactor, which combines chemical coagulation, biological degradation, particle pelletisation and separation in one unit, was applied for onsite wastewater treatment and reuse. As a result of rational use of inorganic coagulant and organic polymer and moderate mechanical agitation, spherical particles were generated in the upflow column and a well-fluidised bed was formed. With a continuous supply of dissolved oxygen through a recycling loop, an aerobic condition was kept in the bottom section of the FPB column. Under such conditions the pellets in the FPB column showed the following characteristics: (1) compact structure and high density; (2) rich in microorganisms; and (3) high MLSS and MLVSS concentrations. Therefore, the FPB bioreactor achieved more than 90% removal of SS, COD, BOD and TP from raw domestic wastewater within a total hydraulic retention time (HRT) of only about 30 minutes. It also showed nitrification and denitrification ability and the TN removal could be about 50% as the recycling ratio was increased to 1:1. The treated water quality is generally competitive with the secondary effluent from a conventional activated sludge process. With these advantages the FPB bioreactor is recommendable as a compact system for onsite wastewater treatment and reuse.     

黄骅坳陷歧口西斜坡带泥晶灰质白云岩油层评价方法及应用

对黄骅坳陷歧口凹陷西斜坡带主要目的层段沙一下沉积体系、储层特征、测井评价的难点进行了系统分析和研究,对该区勘探方向和目标选择具有重要指导意义。以六间房地区地质特征为例,在分析沉积物源、沉积储层特征以及油藏特征的基础上,针对泥晶灰质白云岩储层和砂屑灰岩储层油层评价的难点,提出了利用钻井取心资料和交会图法进行储层岩性的有效识别。利用录井+气测法、录井+气测+成像测井法、MDT测试技术法以及油藏综合评价技术进行油气层的有效识别,从而形成了一套针对该类储层油层评价的有效方法。利用该方法,对歧口凹陷西斜坡带沙一下泥晶灰质白云岩储层新、老井开展新一轮精细油层评价工作,取得了显著的成果,进一步证明了该方法的可行性。     

中央空调系统变频节能改造方案

在我国经济快速发展的大背景下,能源（水、电、油）的消耗在企业中所占的比重越来越高,也受到愈来愈大的重视。同时也由于房地产的快速发展需求,中央空调的市场需求呈现强劲的增长。在市场容量不断增大的吸引下,越来越多的厂家加入到商用中央空调的领域。变频技术应用于中央空调系统,对提升中央空调自动化水平、降低能耗.减少对电网的冲击,延长机械及管网的使用寿命,都具有重要的意义。     

Dislocation configurations in highT c oxide BiSrCaCuO

A study of dislocation configurations in superconducting oxide BiSrCaCuO has been made by transmission electron microscopy. Evidence was found for the presence of dislocation pairs composed of two parallel single dislocations holding together with the same Burgers vectors. The pair can further dissociate into partials, giving rise to a four-fold ribbon. Networks consisting of dislocation pairs were also observed. These phenomena are attributed to the possible ordering of strontium and calcium ions and the existence of some oxygen sheet of the Aurivillius type in the oxide crystal. Schemes to illustrate the configurations are suggested and discussed.     

北京城市供水安全及对策研究

“十一五”期间是首都经济社会快速发展的关键时期，也是应对水资源紧缺、保障供水安全的关键时期。确保首都供水安全是北京水务工作的第一要务，北京市水务局针对城市供水存在的主要矛盾和问题，对城市供水水源、水质水量、水厂、管网、设施等情况进行了全面调查，确定了工作思路，并据此提出了保障城市供水安全的目标和措施。     

低渗透压敏油藏油井流入动态方程及其应用

注水开发的低渗透油藏存在启动压力和压力敏感性,使开发难度加大。当流压低于饱和压力以后,流入动态指示曲线凹向压力轴,会出现一个产量最大点。在前人研究的基础上,从平面径向拟稳态渗流规律出发,考虑启动压力梯度和压力敏感效应对油藏渗流的影响,与油相和液相相对流动能力方程相结合,建立了具有最大产量点的低渗透压力敏感油藏直井流入动态方程,据此可对油藏产能进行评价预测,确定出油井最低允许流动压力和油井的合理工作制度。在龙南、新站油田的应用表明,预测值与实测值比较吻合,满足矿场工程精度要求,说明所建立的流入动态方程能有效评价预测油井产能和确定油井允许的最小流压界限,为充分发挥油井生产能力、合理高效开发低渗透压力敏感油藏提供了理论依据。     

昌平区:突出统筹规划与科学管理

昌平区位于北京市区北部，总面积1352km^2，为半山区。农村居民人均年纯收入6256元。     

对低水头电站规划设计的思考

文章结合平常工作经验,对低水头电站规划设计中需要注意的包括坝(闸)址选择,库区淹(浸)没、枢纽布置、施工导流、正常蓄水位与上下游梯级衔接五个问题加以分析探讨,进行总结和思考。