共查询到18条相似文献，搜索用时 93 毫秒
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光生物反应器及其研究进展 总被引：8，自引：1，他引：7
简述了光生物的反应器的发展史，总结了各种光生物反应器的主要类型及其特点，对密封式光生物反应器和开放式光生物反应的优缺点进行了比较，并展了望了光物反应器的应用前景。 相似文献
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硝化-膜生物反应器处理氨氮废水的研究 总被引：6，自引：0，他引：6
为充分考察膜生物反应器的硝化性能 ,采用活性污泥比消化速率 ,对膜生物反应器处理氨氮废水的硝化性能进行了研究。结果表明 :在容积负荷 1.0 96kgNH+ 4 -N/(m3 ·d)的条件下 ,硝化性能稳定 ,氨氮转化为硝酸盐氮的转化率可达 99% ;亚硝化菌和硝化菌在活性污泥中占优势 ,系统中出现了胞外多聚物和可溶性微生物产物的积累。 相似文献
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介绍了一种新型的、小型的光生物反应器。其利用发光二极管光电板作为光源并利用内置微型泵进行搅拌。这使得光生物反应器小型化,其容积仅190 ml。该光生物反应器照度可调、温度可控,其可以用于浮游植物光合速率的测量。 相似文献
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膜生物反应器技术与市场的发展 总被引：1，自引：0，他引：1
膜生物反应器(MBR)作为一项新型的水处理技术,具有处理效率高、出水水质好、运行管理简单等特点,在水处理领域包括自来水供给保障和污水处理回用中得到了迅速发展。文中从技术发展和市场开发两方面对MBR的现状作了扼要评论,通过历史进展的回顾,着重分析了影响MBR发展的一些关键因数,展望了MBR在市政污水和工业废水处理回用中的发展前景。 相似文献
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光生物反应器中光衰减特征与螺旋藻生长动力学研究 总被引：3，自引：0，他引：3
分析了光照强度在光生物反应器中的分布特征，结果表明，当光波长及光传播的路径确定时，光生物反应器中光衰减特征主要受培养物生物量浓度的影响，由回归的模型对实验数据的拟合可分析光衰减特征与培养物生物量浓度的相关性，为光生物反应器中平均光照强度的确定奠定基础。在光生物反应器中，当营养底物和环境温度不是螺旋藻生长限制因子时，通过平均光照强度对螺旋藻比生长速率的影响分析，结果表明，在实验条件下，螺旋藻比生长速率与平均光照强度的动力学模型可用Aiba光生长抑制方程描述，光亲和系数Ks为238.29umol/(m^2.s)，光抑制系数Ki为0．00493s.m^2/umol，光生物反应器中螺旋藻生长的饱和光照强度出现在190－272umol/(m^2.s)的范围内。 相似文献
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综述了近十年来得到长足发展的化学传感器技术的现状和发展趋势，重点介绍了近年来应用较广的选择性膜微电极，固态伏安徽电极以及凝胶树脂探针技术的发展现状及技术特点，探讨了它们在研究沉积物-水界面附近发生的复杂生物地球化学过程上的应用。 相似文献
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膜-生物反应器与活性污泥工艺处理氨氮废水的微生物特性比较 总被引：1，自引：1，他引：1
考察了膜-生物反应器（MBR）与活性污泥工艺（CAS）处理无机氨氮废水的对比研究.结果表明,同CAS相比,MBR处于高容积负荷、低污泥负荷的运行状态下,硝化效果较好,除了短期的pH控制故障外,氨氮转化为硝酸盐氮的转化率可达99%.随着运行时间的增加,膜组件的截留作用导致MBR内胞外多聚物的积累,电镜扫描（SEM）不能观察到运行后期微生物的形态变化,然而,CAS中微生物形态变化不大.2个反应器中硝化菌、亚硝化菌和异养菌的变化趋势是一致的,异养菌仅为硝化细菌的万分之一;但与MBR相比, CAS中硝化菌数量少32%,亚硝化菌的数量少35%,异养菌数量少24%. 相似文献
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The basic properties of the dynamic model of a turbulent jet formed by a deep-water sewage discharge into the stratified environment of coastal regions are considered. The model developed was used to estimate the parameters of a floating-up jet of deep wastewater discharge from Sand Island into the basin of Mamala Bay (Hawaii) depending on the season and discharge operation mode. The estimates of the float-up depths of the jet and the initial dilution of the jet were estimated on the basis of model calculations using experimental data on the vertical profiles of the water temperature and salinity under the actual conditions of stratification in the study region. It is shown that the further propagation of the wastewater jet depends on tidal events and internal waves generated by tides. The appearance of turbulent jets at the sea surface was recorded. The model estimates of the parameters of the wastewater discharge were compared with the results of experimental measurements. Good agreement was found, which indicates that the physical mechanisms of the propagation of turbulent jets in a stratified medium are adequately described by the model. 相似文献
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Wijarn Simachaya 《Ocean & Coastal Management》2009,52(7):378-382
Wastewater is one of the most serious environmental problems in Thailand. The major source of water pollution in the country is domestic wastewater discharge. The need for the provision of wastewater collection and treatment facilities has long been identified by Central Government as a part of its efforts to protect the environment and well being of the population. Implementation of wastewater treatment projects over the past decades was driven by Central Government because of its technical knowhow and capacity to provide funding. However, when these facilities were handed over to local government authorities to operate and maintain, the concerned government agency had difficulty to manage the facilities in a sustainable manner due to inadequate planning, budgeting and ownership. They were unprepared technically as well as financially to deal with the duties imposed on them. Currently, the Thai Government is in the process of constructing 95% of wastewater treatment plants all over the country. The polluter pay principle (PPP) was introduced to justify the adoption of wastewater tariffs as an alternative source for funding the operation and maintenance of wastewater treatment facilities. The Government in the past adopted a passive role with regard to the introduction of wastewater tariffs. Since the enactment of National Environmental Quality Act, B.E. 2535 (1992), more administrative measures become available, including the implementation of tariff system for schemes funded under the Environment Fund. However there are still political and social obstacles in the introduction of effective, sustainable funding of wastewater facilities, including the perceived low willingness of beneficiaries to pay for wastewater services and the general unwillingness of the water supply sector to combine collection and billing of charges for water supply and the wastewater services. As this concept is new to the Thai Government, it is not yet widely applied. Currently there are only 3 out of 95 local government authorities utilizing the wastewater tariffs and a few more are working toward this end.This paper investigates the application of wastewater tariffs based on the pollution pay principle. 相似文献
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潮汐流动中污染物排放的一种远区计算模型 总被引：7，自引：0，他引：7
本文建立了一个适合于潮汐流动中污染物排放的远区动态平面二维数值计算模型。该模型的计算特点是将流场和浓度场分开计算，即所谓“非耦合解”，运用有限节点法计算了流场，用改进的有限节点法计算了浓度场。该模型应用于长江大厂镇江段，其计算出的流场和该江段典型污染物Ｆ－的浓度场与实测一致，在此基础上，用设计潮计算了一个污水排江方案，确定了其影响范围 相似文献
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This paper reports a study of the field measurements and monitoring of wastewater discharge in sea water at Bari East (Italy). A wastewater sea outfall system is an integral and fundamental part of each wastewater treatment with ultimate sink in the sea water. The design of a water treatment plant and wastewater outfall must take into account the use of the environmental water, the values of physicochemical parameters to be respected in order to safeguard the use itself and the quality of the environmental water where wastewater is issued. In the present study measurements of sea current velocity components were carried out with a VM-ADP (Vessel-Mounted Acoustic Doppler Profiler). Salinity, wind directions and velocities were assessed with, for one survey, the total faecal coliforms and other biochemical parameters. It was emphasized that the measurements necessary for monitoring cannot be concentrated in the wastewater outfall pipe zone only, but should be extended to a neighbouring area of the outfall pipe, with an extension depending on the wastewater discharge, the polluting charge and the magnitude of the sea currents and the winds typical of the zone of interest. The analyses presented in this paper confirm that the sea zones close to the wastewater outfall pipe are particularly sensitive and vulnerable. Such results must be considered in the planning of a wastewater outfall pipe. 相似文献
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人工湿地是一种新型污水处理技术,微生物作为人工湿地的主要分解者,在人工湿地去除水中污染物的过程中发挥着重要作用,因其高效污水净化能力目前已得到广泛关注。本文从人工湿地中的微生物多样性、微生物污水净化机理、研究方法及根际微生物的研究等方面介绍了微生物在人工湿地污水处理中的研究进展。指出根际微生物在人工湿地中的的分布和作用特点,以及开展研究的重要意义。 相似文献
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浙江三门湾宁海下洋涂围垦工程投入养殖后排放的养殖污水将对周边水环境产生的影响预测是该项目环境评价的重要内容。在海湾潮流动力模拟的基础上,建立了污染物对流扩散的数学模型,用以预测养殖污水排放后的扩散范围及强度大小,为环境评价提供科学依椐。 相似文献