河南省博爱县污水处理厂设计介绍

根据博爱县污水处理厂进出水水质,选择奥贝尔氧化沟作为该工程的主体工艺,并介绍了该污水处理厂主要工艺设计参数及工艺特点,以利于博爱县的城市建设,提高该县的经济效益、社会效益和环境效益。     

Fate and removal of selected endocrine‐disrupting compounds in sewage using activated sludge treatment

The variation and fate of four endocrine‐disrupting compounds (EDCs) composed of 4‐n‐nonylphenol (4‐n‐NP), bisphenol A (BPA), 17β‐estradiol (E2) and 17α‐ethinylestradiol (EE2) were investigated along treatment units in a sewage treatment plant (STP), China with anaerobic, anoxic and aerobic activated sludge processes. The mean concentrations were 64.8 ng/L (E2), 115.3 ng/L (4‐n‐NP), 171.5 ng/L (EE2), and 920.7 ng/L (BPA) in the influents, and 22.8 ng/L (E2), 50.9 ng/L (4‐n‐NP), 49.9 ng/L (EE2), and 84.3 ng/L (BPA) in the effluents. The biological treatment was more effective in removing NP, BPA and E2 from the aqueous phase than the primary treatment, while the latter could effectively remove EE2. Their possible removal mechanisms during the biological treatment with activated sludge were further explored through spiked batch experiments under three oxygen‐supplying conditions (anaerobic, anoxic and aerobic). The batch experiments showed that 4‐n‐NP, E2 and BPA were removed from the aqueous phase through biodegradation. The combination of sludge sorption and biodegradation accounted for the removal of EE2. Anoxic activated sludge showed the most rapid degradation of 4‐n‐NP, while E2 could be removed most effectively by aerobic activated sludge, and sludge sorption had a remarkable effect on its removal within the initial 15 min of the experiments under three oxygen‐supplying conditions.     

Survival of infectious Poliovirus-1 in river water compared to the persistence of somatic coliphages, thermotolerant coliforms and Poliovirus-1 genome

The microbiological quality of water is currently assessed by search for fecal bacteria indicators. There is, however, a body of knowledge demonstrating that bacterial indicators are less resistant to environmental factors than human pathogenic viruses and therefore underestimate the viral risk. As river water is often used as a resource for drinking water production, it is particularly important to obtain a valid estimation of the health hazard, including specific viral risk. This work was conducted to compare the survival of infectious Poliovirus-1 used as a pathogenic virus model to the persistence of, on the one hand, thermotolerant coliforms commonly used as indicators and on the other hand, to somatic coliphages and Poliovirus-1 genome considered as potential indicators. We studied the behavior of infectious Poliovirus-1 and the three (potential) indicators of viral contamination in river water at three different temperatures (4 degrees C,18 degrees C and 25 degrees C). This experiment was performed twice with river water sampled at two different periods, once in winter and once in summer. Our results showed that the survival of thermotolerant coliforms can be 1.5-fold lower than infectious Poliovirus-1. In contrast, under all our experimental conditions, somatic coliphages and Poliovirus-1 genome persisted longer than infectious Poliovirus-1, surviving, respectively, 2-6-fold and about 2-fold longer than infectious Poliovirus-1. According to our results exclusively based on survival capacity, somatic coliphages and viral genome, unlike thermotolerant coliforms appear to be better indicators of viral contamination in river water. Moreover, the disappearance of viral genome is well-correlated to that one of infectious virus irrespective of the conditions tested.     

东北某市污水处理厂生化池伸缩缝渗漏治理技术

在对东北某市污水处理厂渗漏原因分析的基础上,提出了渗漏治理的方案,介绍了所用的防水密封材料,阐述了施工要点。     

城市污水处理厂污泥现状及处置对策

结合工作实际,对比国内外污泥处理的先进经验,对几种处置方法进行了列举分析,并通过优缺点比较,提出了城市污水厂污泥处置与利用的最佳方案,以减少污泥造成的环境污染。     

Survival of faecal coliforms in diluted sewage

Enterobacteria disposed of in natural waters survive for a long time. Environmental engineers need to know their survival kinetics, for the determination of which there are at present various formulae. These, however, are of limited validity: experience has shown that the results of calculations of this type may lack predictive accuracy. A parameter, which has not been adequately taken into account up to now, is the effect of the dilution of sewage on bacterial survival kinetics. The investigation of the effect of dilution forms the object of the present research, with the aim of demonstrating the importance of this parameter to the accuracy of the results of the relevant calculations.     

Effects of sedimentation on removal of faecal coliform bacteria from effluents in estuarine water

Faecal coliform deposition rates with estuary type suspended solids have been examined in laboratory experiments. Faecal coliform deposition rates in estuary water increased proportionately with suspended solids concentration, whereas faecal coliform deposition rates in effluent/seawater mixture showed no correlation with suspended solids concentration.

Deposition of estuary water suspended solids showed correlation with time, whereas deposition of effluent suspended solids showed no correlation with time. The adsorption efficiency experiments suggested immediate adsorption of some of the faecal coliforms onto both types of suspended solids and no difference in adsorption potential.

Therefore, it appears that the contrasting effects on faecal coliform deposition can be attributed to the different deposition potential of each type of suspended solids and not to the adsorption process.     

聚硫密封膏在污水处理厂工程中的应用

详细介绍了聚硫密封膏在污水处理厂工程中的应用工艺,包括选择材料与机具、基层处理、材料拌制和嵌填施工。     

污水源热泵空调系统在污水处理厂的应用

该项目以二级出水作为污水源热泵系统的热源／热汇。介绍了系统流程、水源侧系统、用户侧系统及系统的控制等。对该方案与电制冷加燃油锅炉方案的经济性进行了比较,结果显示该方案的初投资比后者低6％左右;运行费用夏季基本相当,冬季大约低67％。     

城市污水处理厂的电气节能

结合广东省环境保护工程研究设计院在环保行业,特别是城市污水处理厂多年的设计经验,阐述了城市污水处理厂电气设计的节能原则、节能途径,着重从变压器选择、提高功率因数、减少线路损耗、电机节能、照明节能等环节进行了探讨,以保障污水处理厂的正常运行。     

湖州某污水处理厂的地基处理

以湖州市某污水处理厂扩建工程为例，结合工程场地地质概况，通过对厂区地基处理方案，进行综合分析比较，确定了采用PC管桩处理方案并作了具体阐述，指出了施工中应注意的问题，经实践证明，采用PC管桩处理地基加固效果良好。     

瑞士伯尔尼污水处理厂的管理模式及收费机制

基于对瑞士伯尔尼污水处理厂的概况、污水处理工艺、企业与员工架构情况的分析,介绍了其管理运营模式,并对该厂与中国典型污水处理厂的收费机制进行了探讨,以供参考。     

长治市污水处理厂运行控制与维护管理

对长治市污水处理厂近十年的日常运行过程中出现的问题及解决方法进行了分析和总结,阐述了城市污水处理运行中应当注意的问题,为更好地推广和应用除磷脱氮鼓风曝气氧化沟工艺积累了一定的实践经验。     

污水处理厂工程聚硫密封膏的施工

由于特殊功能要求,聚硫密封膏的施工成为某污水处理厂工程的关键工序。介绍聚硫密封膏在施工过程中混凝土基层的处理、填置背衬材料、涂基层处理剂及密封材料的拌制和详细的嵌填工艺。     

城镇污水处理厂监管研究探讨

分析我国目前城镇污水处理厂建设与运行管理情况,明确政府对污水处理厂监管的目的和意义,重点对政府如何对污水处理厂进行监管和监管的主要内容进行了详细探讨,以规范污水处理运营管理,实现社会效益和经济效益全面提高。     

山东省某污水处理厂的设计

根据工程的设计进出水水质特点,确定最终的污水处理主体工艺为A2/O工艺,分析并结合设计条件,解决了在设计中遇到的问题,结合污水处理厂的进水条件和受纳水体的常水位及防洪水位,确定了该工程需要在厂区内设置一次提升。     

HDPE土工膜在污水处理厂防渗工程中的应用

结合工程实例,介绍了HDPE土工膜的性能特征,以及其在污水处理厂防渗工程应用中的设计和施工要点。     

污水处理厂泡沫问题浅析

研究了泡沫对污水处理厂正常运行产生的影响,结合具体实例,分析了泡沫产生的原因,根据泡沫形成机理及其影响因素,探讨了几种常用的泡沫消除方法,得出泡沫消除采取物理方法和化学方法相结合效果较好的结论。     

Advanced treatment of sewage by pre-coagulation and biological filtration process

A pre-coagulation and bio-filtration process for advanced treatment of sewage was developed and experimentally discussed with a pilot plant. The bio-filtration unit consists of a denitrification filter, a nitrification filter with side stream to the denitrification filter, and a polishing filter with anoxic and aerobic parts. Concentrations of SS, T-COD(Cr), T-carbonaceous BOD, T-N and T-P in the effluent were stably kept at less than 3, 20, 5mg/L, 2mg N/L and 0.2mg P/L, respectively, and transparency at higher than 100 cm, under total hydraulic retention time of 3.2h in the bio-filtration parts (filter-bed). ORP in an anoxic tank before a nitrification tank should be at a low level of less than -120 mV to keep remaining NO(-)(x) - N less than 1mg N/L, but must be maintained at a level higher than -150 mV. The maximum nitrogen-loading rate under a water temperature of 18 degrees C should be less than 0.25 kg N/(m(3)-filter-bed.d). Concentrations of microorganisms kept in the reactors were as high as 4000-5000 mg COD/L-filter-bed. Denitrification activity of 0.4 or 0.7 kg N/(m(3)-filter-bed.d), and nitrification activity of 0.3 kg N/(m(3)-filter-bed.d) were obtained, respectively, under a water temperature of about 18 degrees C. Backwashing in each tank as well as methanol addition and aeration in the polishing filter were operated successfully by the automatic control systems. These results proved that this process is applicable to advanced treatment of sewage with easy maintenance.     

大同市西郊污水处理厂奥贝尔氧化沟工艺

介绍了大同市西郊污水处理厂奥贝尔氧化沟的工艺流程 ,从设计规模、水质情况及设计参数等方面阐述了其具体工程概况 ,提出了奥贝尔氧化沟及其工艺设计的特点