共查询到19条相似文献,搜索用时 62 毫秒
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膜生物反应器是膜技术和生物反应器技术相结合而发展的一种新型的废水处理工艺。本文介绍了膜生物反应器的分类及组成,讨论了膜生物反应器在废水处理中运行效果的影响因素以及膜的污染的机理与防治,并对膜生物反应器的发展前景进行了展望。 相似文献
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厌氧膜生物反应器在污水处理中的研究进展 总被引:1,自引:0,他引:1
综述了厌氧膜生物反应器中的微生物种群与分布特点、厌氧膜生物反应器在污水处理中的应用情况,讨论了影响厌氧膜生物反应器性能的主要参数、膜的污染预防与控制等,最后探讨和展望了厌氧膜生物反应器的应用前景,并指出了该领域今后的研究方向。 相似文献
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膜生物反应器中膜的清洗研究 总被引:4,自引:0,他引:4
对膜生物反应器处理柠檬酸酸洗废水中膜的清洗进行了研究,通过不同的清洗方法对膜通量的恢复程度进行评价。确定了反冲洗时间及反冲洗周期,经过试验研究与分析,在反冲洗的同时结合正洗的清洗方法,效果好于单纯的反冲洗方法;确定了化学清洗剂种类、清洗剂的用量以及化学清洗周期。采用物理清洗与化学清洗相结合的方法,清洗效果很好。保证了MBR的稳定运行。 相似文献
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膜分离技术在生物化工领域的应用 总被引:1,自引:0,他引:1
在简要介绍膜分离技术特点及其在生物化工产品分离应用现状基础上,指出了膜分离技术在应用中仍存在的一些问题,并进一步对其解决对策进行了论述,最后对膜分离技术在生物分离方面的发展方向和应用前景进行了展望。 相似文献
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Fluoropolymers usually have high mechanical strength and excellent chemical stability and thus have been employed for the last several decades as materials for membrane separation processes, typically in water purification and energy applications such as microfiltration (MF), ultrafiltration (UF), fuel cells, battery separators, etc. Recently, new membrane operations such as membrane distillation (MD), membrane crystallization (MCr), membrane emulsification (ME) and membrane contactors (MC) have become popular. A much stronger understanding of the basic properties of the materials utilized is required for adopting the appropriate membrane and for finding the relationship among material properties, membrane morphology and the transport phenomena in the membranes. This review presents the structures and properties of fluoropolymers for membranes, the preparation and modification methods of fluoropolymer membranes, and their applications. Recent progress in the development of novel fluoropolymers for membranes and their fabrication and modification methods are reported as well. 相似文献
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膜系统在生物技术中应用的研究进展 总被引:1,自引:0,他引:1
膜系统以其独特的构型和优越的性能而广泛应用于生化反应、物质纯化以及分子、乳剂、微粒的回收、生产中。膜系统利用膜的高选择性、单位体积的高接触面积及其对两相混合或接触水平调控的优势在生物技术中占有重要地位。本文主要论述了各种薄膜的应用研究,包括已经广泛使用的超滤和微滤、新出现的膜生物反应器、膜色谱以及用于制备乳剂和微粒的膜接触器等,并对上述膜过程在膜材料、模型设计、操作参数及在生物技术领域的应用等方面进行了深入研究。 相似文献
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膜生物反应器以其突出的优点迅速成为污水处理的新的发展方向,但一直以来膜污染都是其推广应用的障碍.在膜生物反应器中投加滑石粉,主要通过膜通量等参数来研究滑石粉对膜污染的减缓作用,试验结果表明当滑石粉的投加量为1.4 g/L时膜通量下降最为缓慢,污泥沉降性能也相对较好. 相似文献
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本文介绍了我国无机陶瓷滤膜的研究情况,并对陶瓷滤膜的分类和制备技术以及膜污染和防止作了简要描述;同时,对陶瓷膜分离技术在生产、生活中的应用状况,我国陶瓷滤膜的应用前景作了简要分析。 相似文献
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Won Seok Moon Seung Bin Park Seung-Man Yang 《Korean Journal of Chemical Engineering》1998,15(2):136-140
The design variables of a membrane reactor, such as the permeation rate through the membrane and catalyst loading in the membrane,
have received little attention in comparison with the operating conditions. A non-dimensionalized model for a membrane reactor
was developed to account for the effects of permeation rate and catalyst loading. The increased permeation rate did not always
increase the exit conversion and there existed a maximum point of exit conversion. At isothermal conditions, the exit conversion
was saturated as catalyst loading was increased; however, when the reactor was under non-isothermal condition along the axial
direction, there existed an optimum catalyst loading at which the exit conversion was maximum. With this model, the optimal
configuration of permeation rate and catalyst loading could be determined. 相似文献
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In this paper, flat membrane distillation membranes have been successfully manufactured from PVDF/DMAc and PVDF/DMF blends by using phase inversion induced by an immersion precipitation technique. The structure of the membranes is asymmetric with a porous top layer and macrovoids, as assessed by SEM. The existence of MD fluxes in these membranes is established by performing various pure water flux experiments. A maximum in the MD fluxes for a particular value of the polymer content in the casting solution from which the membrane is manufactured has been observed. The dependence of the magnitude of the fluxes on the membrane thickness is also discussed and the influence of temperature polarization evaluated. 相似文献