岳阳市南津港污水处理厂二期工程的工艺设计及运行

岳阳市南津港污水处理厂二期工程设计规模为12×104m3/d,采用倒置A2/O工艺,要求出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级B标准。从2010年2月—7月的运行数据来看,出水水质总体稳定且优于设计值,处理效果很好。详细介绍了工艺设计及运行情况,并总结了设计特点。     

双层平流沉淀池在深圳布吉污水处理厂工程中的应用

深圳布吉污水处理厂设计规模为20×104m3/d,是国内第一座地下式污水处理厂,采用HYBAS生化池/双层平流式二沉池/D型纤维滤池三级污水处理工艺。运行结果表明,出水水质达到了《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。介绍了双层平流式二沉池的工作原理、工艺特点及设计参数,并对其运行效果进行了分析。     

STCC工艺污水处理厂的设计经验

武汉市黄金口污水处理厂设计采用了具有除磷脱氮及深度处理功能的STCC污水处理工艺,实际运行表明,该工艺运行效果优良,出水水质达到了《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。介绍了各单元的工艺设计参数及设备布置,总结了工艺特点以及设计经验。     

昌吉市高新技术产业开发区污水处理厂工艺设计及运行

昌吉市高新技术产业开发区污水处理厂根据原水中含有大量工业废水的水质特点,生物处理设计采用A~2/O工艺,深度处理采用Fenton/絮凝沉淀工艺,出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级B标准。介绍了工程主要构筑物的设计参数及工艺特点,并对运行过程中出现的污泥膨胀、曝气池泡沫等常见问题提出了相应措施,对污水厂的设计和运行具有一定的现实指导意义。     

倒置A2/O 工艺在城镇污水处理厂中的应用

本文结合工程实例,通过介绍污水处理厂存在的一些问题,重点探讨了倒置A2/O工艺在城镇污水处理厂的设计及运行情况。实际运行结果表明,改造后的倒置A2/O工艺满足污水处理的要求,出水稳定达到GB18918-2002《城镇污水处理厂污染物排放标准》的一级A标准。     

微涡流絮凝沉淀/转盘滤池深度处理工业园区污水

湖南某工业园区污水处理厂设计规模为6×104m3/d,采用微涡流絮凝/立式斜板(管)沉淀和转盘滤池组合工艺作为深度处理工艺。详细介绍了工艺选型、设计及工程应用情况。实际运行结果表明,该组合工艺处理效果好,出水水质稳定达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。     

城镇污水处理厂MBR工程调试运行及分析

介绍了无锡市城北污水处理厂四期工程的设计概况和所采用的MBR工艺的情况,总结了相关MBR工艺调试的经验。监测数据表明,该工艺运行稳定可靠,出水水质稳定达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准,实现了污水处理厂的正常运行。     

MBR工艺在南京市东阳污水处理厂一期工程中的应用

南京市东阳污水处理厂一期工程设计规模为5.0×10~4m~3/d,污水生物处理采用MBR工艺,PVDF中空纤维膜丝采用海藻式固定方式,尾水执行《城镇污水处理厂污染物排放标准》(GB 18918—2002)中的一级A标准。运行结果表明,出水水质稳定达标。介绍了该工程的设计特点及实际运行情况,并指出了应用MBR工艺的注意事项。     

A~2/O工艺用于城镇污水处理厂的升级改造

天津市津南区环兴污水处理厂升级改造工程设计规模为3×104m3/d,出水排放标准由《城镇污水处理厂污染物排放标准》(GB 18918—2002)的二级标准提升为一级B标准。改造工程设计采用A2/O工艺,出水水质达标。介绍了升级改造工程的设计、改造措施及运行情况。     

Bardenpho+深床滤池工艺用于半地下污水处理厂工程

长沙市敢胜垸污水处理厂(一期)是长沙市第一座半地下污水处理厂,设计规模为10×10~4m~3/d,出水水质在满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准的前提下,主要指标还需满足《地表水环境质量标准》(GB 3838—2002)Ⅳ类标准(总氮按照10mg/L控制)。该工程采用Bardenpho活性污泥/活性炭吸附/深床滤池工艺,满足污水处理厂的稳定运行和达标排放。详细介绍了进出水水质、处理工艺、设计特点及新技术的应用,可供参考。     

污泥制砖存在问题浅析

污泥制砖符合国家的环保政策,但在技术方面还待进一步创新和突破。为此分析了污泥制砖在技术方面、环保方面和社会大众认可方面存在问题及相应的改进措施。     

干旱区绿洲环境下的新疆小城镇建设投资

一、研究区域基本现状新疆地处欧亚大陆腹地,地貌轮廓表现为“三山夹两盆”,山地与平原的面积大致各占50%,镶嵌于戈壁沙漠的绿洲仅有7万平方公里。新疆土地面积166.49万平方公里,占全国总面积的六分之一。气候干旱,荒漠广布,是中国最大的干旱区,是亚洲干旱核心区,也是世界上著名的干旱区之一。水资源短缺,生态极度脆弱。新疆2004年底有1950万人,人均GDP已经超过了1000美元,城镇化进入了快速发展阶段,特别是小城镇的发展速度较快。但新疆特殊的干旱区绿洲环境,使得小城镇的发展存在许多问题。一是城镇规模小而散,基础设施配套差,城镇集散和…     

Levels of manganese in the urine of female farmers in non-polluted regions in Japan

Nearly 1500 urine samples were collected from female farmers in eight regions widely scattered in the islands of Japan in the winter of 1987-1988. The samples were analysed for manganese by wet ashing and flameless atomic absorption spectrophotometry under strict quality control. The values observed after adjustment for a specific gravity of 1.016 were distributed log-normally with a geometric mean of 0.65 microgram/l and a geometric standard deviation of 2.47. There was no effect of aging or any effect of smoking on the urinary manganese concentration. The inter-regional difference may be present but not yet conclusive. As no sex difference was observed in a previous study, it may be possible to deduce that the value may possibly stand for the "background" level of both men and women, either smoking or non-smoking, among the general Japanese population. The observed value is discussed in comparison with values reported in the literature.     

Typification of Fires in Buildings in Spain

Although the Dirección de General de Protección Civil (DGPC), an agency of the Spanish government, has been responsible for the collection of data and the statistical analysis of fires since 1985, it has not as yet issued any reports. It is true that a couple of studies have been made, but in neither case did they use a standardized methodology but relied simply on the heterogeneous information provided by the fire brigades which cooperated in the studies. At that time Spanish fire brigades did not have special units for professional fire investigation, nor was the information derived from standardized methodologies suited to research purposes. In addition, information was extremely scarce and basic, focussed only on the fire, the use of the building and personal data of the victims. In this context, the project for a Fire Investigation Unit in the Fire Brigade of Málaga (the sixth largest Spanish province in inhabitants) was set up. Although inspired in the methodologies used in the USA and in the UK, the aim was to create a customized methodology for the first scientific investigation of fires in Spain. Our research was conducted in 2007. Using the methodologies of the USA and the UK, our own methodological approach and the Spanish regulations, we drew up a questionnaire with 110 variables arranged into 6 modules. We studied 96 fires out of the 154 emergency fire calls received in 2007, having omitted some emergency calls for various reasons. Our results revealed that it was necessary to generalize the installation of fire extinguishers in residential buildings, to train the general public in the use of these devices, to promote the use of fire and smoke detectors in residential buildings, to encourage the inspection and control of old electric installations and to monitor the new installations, to generalize the implementation of emergency and evacuation plans and to design new systems and materials for the cabinets where hand-held extinguishers are stored.     

分光光度法测水中余氯

介绍了用双硫腙分光光度法测定水中余氯的新方法，阐述了其测定试验过程，根据试验结果显示，其结论符合国家标准，表明该方法可用于自来水等样品中余氯含量的测定，结果比较准确。     

Intersections of inequality in homeownership in Sweden

Abstract

Inequalities relating to ownership of housing have become a major issue de jour in many Western societies. This article examines how the distribution of homeownership in Sweden relates to two factors widely seen as significant to such inequalities, namely parental tenure status and place of birth. We use longitudinal registry data to examine the bearing of these two factors on individual-level tenure progression since the beginning of the 1990s for persons at different stages of their housing careers. We extend existing understandings of Swedish homeownership patterns by demonstrating that inequalities relating to place of birth and parental tenure intersect with one another in ways that substantially advantage certain subgroups while disadvantaging others, and by demonstrating that experiences of entry into homeownership have in recent years been changing in markedly different ways for these different subgroups. Overall, Swedish homeownership inequalities, far from dissipating, appear to be hardening along existing lines.     

莳花在城市绿化中的应用

目的:花化、香化、彩化已成为城市园林绿化的主要趋势,也是为满足人们对环境要求越来越高的一种心境。方法:选择采用莳花能表现出品种繁多,色彩艳丽等不同的方式,从而能在很大程度上丰富了植物造景的层次感要求。结果:能使其达到美化环境、增添节日气氛、提高绿化品质等方面有着突出的作用。结论:莳花造景对城市的美化可达到立杆见影效果,从而提高城市的形象和品位。     

日本城市浅层地下空间利用的新成就

本文结合日本川崎市站前广场和神户市哈巴兰德地区的立体化再开发，分析介绍当前日本浅层地下空间开发利用的成就和特点。     

遗传算法在边坡稳定系数计算中的应用

边坡稳定性的关键问题是确定最危险滑动面(潜在最危险滑动面)和边坡的稳定系数。国内外一般是采用先假定边坡滑移模式,然后近似确定最危险滑动面,再求近似的边坡稳定系数的方法来分析边坡的稳定性,但假设的边坡滑移模式难以反映边坡滑移的实际状态。因此本文探索利用遗传算法搜索最危险滑动面,并得到最小稳定系数及对应的最危险滑动面曲线,取得了较好的效果。     

地质情况复杂地区高速公路隧道地质预报研究

针对地质情况复杂地区垫邻高速公路设计、施工中的具体问题，从地质预报的方法、原理方面入手，对地质情况复杂地区高速公路隧道施工中的地质超前预报工作进行了深入的研究，在分析归纳的基础上，提出合适的工作方法。