共查询到19条相似文献,搜索用时 218 毫秒
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本试验采用ABR-SBR工艺处理屠宰废水,取得了很好的处理效果,其COD去除率为86%,SS平均去除率为95%.并以COD、SS的去除效果为分析对象,探讨了ABR反应器在屠宰废水处理中的作用.试验表明,ABR-SBR工艺是一种具有应用前景的水处理技术,特别适宜处理中高浓度有机物废水. 相似文献
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一体式膜生物反应器用于中水处理的经济效益分析 总被引:13,自引:1,他引:12
根据调研和试验运转参数 ,对一体式膜生物反应器的设备投资、占地费用、处理成本、节水效益和投资回收期进行了分析 ,得出了一体式膜生物反应器用于中水处理时 ,具有技术、管理、经济效益上的综合优势的结论。 相似文献
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同步硝化反硝化(SND)生物脱氮技术与传统生物脱氮技术相比,具有节省碳源、减少曝气量、可实现单级生物脱氮等优点.故近年来受到水处理工作者的广泛关注。移动床生物膜反应器工艺是20世纪80年代初发展起来的一种新型水处理工艺,发展十分迅速。该文介绍了移动床生物膜反应器(MBBR)的工艺原理及工艺特点,主要总结了国内在同步硝化反硝化技术中的研究和应用进展,指出了该项技术的发展方向和趋势。 相似文献
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新型水处理用短管填料性能特性研究 总被引:3,自引:0,他引:3
试验研究了一种新型的水处理用短管填料的性能特性。研究表明 :在模拟的竖流式沉淀池及SBR反应器中 ,投加该填料可以使出水浊度去除率提高 ,提高泥水分离的效果 ,减少泥水分离的时间 ;该短管填料同时能提高反应器曝气充氧效果 ,改善反应器的布水性能和沉淀池内部的水流条件 相似文献
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回顾了目前应用CFD技术对臭氧给水处理工艺的研究情况。从前人的研究成果来看,大多数的研究以臭氧接触池为对象,研究内容主要针对池内出现的回流、死水区问题而进行池型结构的优化,结果发现优化水力结构可提高池内的气液接触效率,并使流态更接近理想推流。部分研究涉及池内臭氧衰减及有机物降解反应的探索,多数结论认为臭氧衰减符合一级反应动力学,有机物降解则为二级反应,但反应机理须视具体情况而定。基于对现在的研究进展及CFD应用前景分析,未来的研究方向将是对于池内有机物降解及相关化学反应机理的进一步研究,以及建立更为全面的处理工艺运行评价指标。 相似文献
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Ultraviolet light is now recognised to be very effective for inactivation of Cryptosporidium parvum oocysts; however, its application for disinfection of finished water necessitates validation of UV reactors prior to their installation. Although reactor performance will likely be assessed using non-pathogenic microorganisms as biodosimetry surrogates, it would be prudent for the water industry to simultaneously measure Cryptosporidium oocysts inactivation in controlled bench-scale studies using the water matrix intended for disinfection. The likelihood of that occurring is dependent upon the availability of infectivity measurement procedures that are more user-friendly than the mouse infectivity assays currently used. This study describes a modified cell culture procedure that would enable reliable measurement of changes in oocysts' infectivity following their UV treatment. Also, a number of different biodosimetry surrogates were examined and one selected for comparing the UV doses delivered between bench-scale and full-scale biodosimetry studies. Impacts of UV disinfection on production of disinfection byproducts, effects of lamp ageing on effectiveness of disinfection and the costs associated with employing this technology were also examined. 相似文献
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Instrumentation in anaerobic treatment--research and practice. 总被引:1,自引:0,他引:1
High rate anaerobic treatment reactors are able to uncouple solids and liquid retention time, resulting in high biomass concentrations. Principal advantages of anaerobic treatment include: energy efficiency, low biomass yield, low nutrient requirement and high volumetric organic loadings. In order to facilitate small reactors operation with stable and good performance automatic process control systems in combination with on-line instrumentation are proposed. The paper reviews the development and availability of the principal instrumentation for anaerobic treatment processes. First, the most important measuring principles are discussed, followed by a review of the most important process variables with emphasis on the development of their instrumental measurement techniques and application in research. Finally, a summary of actual application of instrumentation in full-scale anaerobic treatment plants is presented. 相似文献
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The flow field of UV reactors was characterised experimentally using particle image velocimetry (PIV) and modelled with computational fluid dynamics (CFD). The reactor flow was integrated with the radiation fluence rate and photolysis kinetics to calculate the overall conversion of photo-reactant components in annular UV reactors with an inlet parallel and perpendicular to the reactor axis. The results indicated that the fluid flow distribution within the reactor volume affects photo-reactor performance. 相似文献
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《Water science and technology》1998,37(4-5):159-166
The application of in situ hybridization with group specific oligonucleotide probes detected by epifluorescence microscopy and confocal laser scanning microscopy was tested to identify spatial gradients in the distribution of bacteria in biofilms of plug flow reactors and in the bottom sediment layer of a drinking water reservoir. The two tubular biofihn reactors were fed with the effluent from a full scale biological wastewater treatment plant to which were added the chlorophenols whole degradation was being investigated. One was operated as a continuous-flow reactor and the other as a sequencing batch reactor.The vertical gradients in the microbial colonization of the sediment were analyzed by means of glass slides exposed to the sediment.In the biofilms of both reactors the beta-Proteobacteria dominated. The Cytophaga-Flavobacterium group and the Gram-positive bacteria were also abundant. Only small amounts of gamma-bacteria could be detected. This is contrary to findings using traditional cultivation methods. Unlike the biofilms in the reactor, the bacterial Aufwuchs on the glass slides in the sediment presented a surprising diversity of morphological types and size classes of bacteria. 相似文献