漂染工业园污水厂实际运行中出现的问题及其对策

某漂染工业园污水处理厂实际运行过程中存在的加酸系统容量偏小、预处理系统容易堵塞、氧化沟系统曝气不足、鼓风机曝气系统故障多、污泥SVI值偏高以及污泥脱水机滤带损耗大、效率低等问题,分析了其各自产生的原因,并提出了相应的对策.通过改造加酸系统、更换格栅与排泥泵等预处理设备、抬高表曝机、增加氧化沟曝气设备、改造污泥脱水系统和调整运行方式等措施使上述问题得到了有效解决.     

延长气田含甲醇污水预处理工艺改造效果评价

含甲醇污水预处理效果不佳会对装置运行和后续流程产生不利影响。为了保证后续处理正常运行,需要对预处理工艺进行改造。文章分析了延长气田含甲醇污水预处理工艺存在的问题,并针对存在问题进行了工艺改造,优化了加药方案。预处理改造后,污水含油量、铁离子含量、悬浮物浓度明显降低,透光率显著提高。改造后有效缓解了因预处理效果不佳所引起的后续设备和管线频繁结垢、堵塞的问题。     

西北某污水处理厂提标改造措施及效果

西北某城市污水处理厂提标改造工程,在不新建反应池、不改变主体结构的前提下,在好氧池中改造出第二缺氧区,拆除好氧池中微孔曝气管,改为微孔曝气盘,提高了好氧池的曝气充氧效率。好氧池中污泥浓度控制在6 000 mg/L,污泥外回流比为200%左右,内回流为100%左右,运行稳定,出水COD、氨氮、TN和TP等指标由《污水综合排放标准》(GB 8978—1996)的一级标准提升到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级B标准。     

MSBR池曝气系统的优化

针对某污水厂MSBR池曝气系统在实际运行中存在的诸多问题,如好氧池曝气不足、SBR池污泥沉积及沉淀阶段漏气等,一一进行了分析,并提出优化措施,实施后取得了较好的效果.     

城市污水处理厂预处理系统的改造设计

污水预处理对污水处理厂的正常运行起着非常重要的作用,结合无锡市锡山区污水处理厂的工程改造实例,针对实际工程运行过程中细格栅、厌氧水解池等预处理系统中出现的问题,介绍了细格栅池以及升流式膜法水解池的设备选型、改造技术参数以及工艺特点.     

涡阳县城东污水处理厂曝气工艺改造设计

文章针对涡阳城东污水处理厂表曝氧化沟充氧能力不足、设备老化、转碟曝气机噪声大等问题,提出取消转碟,配套微孔曝气系统,将循环流氧化沟改造为推流式A/O生化池等措施。工程实践表明,改造工程节约了能耗,并有效提高了系统的硝化、反硝化及生物除磷效果。     

刮吸泥机运行研究与改造

通过对济南市水质净化二厂DE氧化沟处理中的终沉池ZXQ-54型刮吸泥机的运行情况分析研究,指出设备设计和安装中的失误和存在:吸泥量明显不足;泥管极易堵塞;虹吸系统电磁阀易吸入污水中杂质,虹吸自动停止;污水调节阀可调范围小;虹吸主管位置不当5个不足。经过改造后,成功解决了虹吸量不足,泥管易堵塞的不足,取得了对终沉池刮泥机改造的初步效果。     

盘锦沥青厂综合废水预处理及深度处理工程实例

对盘锦沥青厂原有污水处理厂进行扩容改造。针对进水油含量高、水质水量波动大、有机物浓度高且可生化性差等特点,重点加强预处理及深度处理工艺的功能。预处理采用调节除油罐、混凝加载磁分离系统及气浮池组合工艺,深度处理采用高效澄清池、臭氧接触池、曝气生物滤池与后臭氧回流组合工艺,出水水质稳定达到辽宁省《污水综合排放标准》(DB 21/1627—2008)表1的要求。     

曝气沉降技术处理含油污水试验及应用

阐述曝气沉降技术及其在大庆油田采出水处理方面的应用情况。选择了3个典型采出水处理站,对曝气沉降技术涉及的曝气释放器材质,曝气位置,曝气比等参数进行应用评价分析,试验可知：应采用聚四氟乙烯曝气管,曝气管最佳位置为1/2处,曝气比最佳为1∶20。在南五区来水pH值平均10.1,聚合物含量平均为712 mg/L,表面活性剂含量平均为45 mg/L的试验条件下,曝气后硫化物去除率增加40％以上,黏度去除率增加20％以上。     

基于大数据分析的曝气调控技术实践与研究

曝气是污水处理过程中的重要环节,传统的曝气系统普遍存在曝气滞后、能耗高、溶解氧波动大等问题。为此,将大数据分析技术应用于污水处理的曝气调控过程中,提出了曝气调控实践路径,并结合五龙口污水处理厂生物池的曝气过程进行了实证研究,经多维数据统计、多维数据拟合计算和应用与反馈3个环节,求得该生物池曝气环节中不同时段最优鼓风机功率的动态调控图,为该污水处理厂曝气调控过程的优化提供了参考。结果表明,运用大数据分析技术对污水处理曝气环节进行调控优化,可以在无需停运改造的前提下有效提升污水处理厂的曝气效率,使吨水电耗降低3%~5%,为污水处理曝气环节的优化提供了新思路。     

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。