活性砂滤池在污水处理厂深度处理中的应用

安徽某污水处理厂在深度处理阶段采用了活性砂滤池,对该活性砂滤池的设计参数、运行情况以及经济指标进行了介绍。运行数据表明,活性砂滤池对悬浮物具有良好的去除效果,当进水SS为15~35 mg/L时,出水SS8 mg/L,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。采用活性砂滤池作为深度处理工艺,经济效益较好,占地面积较小。     

曝气生物滤池/活性砂滤池用于印染废水深度处理

采用曝气生物滤池/活性砂滤池工艺深度处理印染废水,介绍了该组合工艺的技术特点,并给出构筑物的工艺参数以及实际运行效果。结果表明,该组合工艺能有效地去除印染废水中的污染物,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。     

A/O生物膜法(SDF/SAF)在污水厂的应用与调试

南方某城镇污水处理厂处理规模为2×10~4m~3/d,主要处理工业废水和部分生活污水,采用美国STS公司A/O工艺的SDF(淹没生物滤池)和SAF(淹没曝气滤池)生物膜法,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.     

活性砂过滤器在城镇污水厂节能减排中的应用

采用活性砂过滤器对城镇污水处理厂二沉池出水进行深度处理,考察了以活性砂过滤器为深度处理工艺时,城镇污水处理厂出水水质的稳定性及其达到一级A排放标准的可能性。结果表明:活性砂过滤器的出水水质稳定,其出水的SS、TP浓度分别为(1～5)、(0.2～1.1)mg/L,优于《城镇污水处理厂污染物排放标准》的一级A标准;出水的氨氮浓度为4～8 mg/L,达到《城镇污水处理厂污染物排放标准》的一级B标准;出水的COD浓度为55～75 mg/L,接近于《城镇污水处理厂污染物排放标准》的一级B标准。可见,将活性砂过滤器作为新建或已建污水厂的深度处理工艺,可在一定程度上达到节能减排的目的。     

微絮凝-砂滤保障再生水的生物安全性研究

将微絮凝-砂滤工艺用于城市污水处理厂的深度处理,利用中试装置研究滤层厚度对砂滤池去除CODCr、TP、氨氮、SS的影响,并在昆山某城市污水处理厂微絮凝-砂滤工艺的V形滤池中取样,研究滤层厚度对砂滤池去除总大肠菌群的影响。结果表明:当过滤速度为5~9 m/h时,砂滤池对水中TP的截留主要发生在0~90 cm的滤层内,此时出水能够达到GB 18918—2002《城镇污水处理厂污染物排放标准》一级A标准;微絮凝-砂滤工艺能有效保障出水的生物安全性,在絮凝反应和物理截留双重作用下,可将总大肠菌群数降低1~1.7个数量级。     

絮凝—滤布滤池在污水厂升级改造工程中的应用

结合絮凝—滤布滤池在渭南某污水处理厂升级改造工程中的实际应用情况,对改造后的处理效果进行了分析,出水水质可达到爯城镇污水处理厂污染物排放标准爲(GB 18918—2002)的一级A标准.     

某海岛城镇污水处理厂的提标改造

以某海岛城镇污水处理厂水质提标改造为主要研究背景,对工艺设计进行了详细介绍,并针对原有污水处理厂运行情况,分析AAO+二沉池+混凝沉淀+滤布滤池工艺对高盐分、高氨氮鱼产品加工城镇污水的处理效果。经过实践运行表明,该系统运行稳定,出水水质达到GB 18919—2002《城镇污水处理厂污染物排放标准》一级A标准水质要求。     

江阴南闸综合污水处理厂提标改造工程设计

南闸污水处理厂根据现有工艺的运行情况,结合新的排放标准,采用厌氧+缺氧/好氧+絮凝沉淀+纤维转盘滤池工艺处理以印染废水为主的综合污水,出水水质稳定达到《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》(DB 32/1072—2007)和《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。     

阜阳市颍南污水处理厂污水处理升级改造工程

以阜阳市颍南污水处理厂污水处理升级改造工程为例,根据水质特点,采用"高效沉淀池+深床滤池"工艺进行污水深度处理,使出水水质达到了GB 18918—2002城镇污水处理厂污染物排放标准一级A标准。     

城市污水处理厂含硫恶臭气体的产生与治理

胜利油田沙营污水处理厂采用曝气除油沉砂/水解沉淀/曝气生物滤池工艺处理市政污水,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。根据当地的环境条件及已有的工程实例经验,采用洗涤—生物滤床过滤联合除臭工艺,对格栅间、水解沉淀池、DN生物滤池、脱水机房及反冲洗废水池等产生有毒有害气体的构筑物进行加盖封闭,再通过管道将臭气输送到独立的除臭工艺段,处理后高空排放。在除臭构筑物周围5 m内环侧和厂界取样检测,排放气体达到《恶臭污染物排放标准》(GB 14554—93)的二级标准。     

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。