Factors influencing on permeate flux in membrane-separation activated sludge process

膜分离活性污泥法产水通量的影响因素

• 批准号: 10680536
• 负责人: MOMONOI Kiyoshi
• 金额: $ 2.05万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680536/
• 关键词: activated sludge process; submerged membrane-separation; permeate flux; membrane fouling; set-up flux; air bubbling strength; 汚泥負荷; 膜分離活性汚泥法; 膜透過流束; 生物処理; 膜面付着物; 生物代謝産物

In activated sludge process with membrane filtration, complete solid-liquid separation is achieved and operation with high organic load can be applied. Especially, system with submerged membrane separation is expected as an excellent membrane-separation system because of its energy-saving and cost-effective performance. However, factors influencing on the permeate flux in this system have not been clarified yet. This study was conducted to investigate the influence of initial operating permeate flux and air bubbling volume on permeate flux in the system. The strength of air bubbling was expressed as "superficial velocity", defined as an air volume divided by a cross section of bubbling area. In addition, batch filtration tests were conducted to investigate the mechanism of membrane fouling.Permeate flux was set up at 0.18, 0.36 or 0.72 (m/day) in the beginning of operation with a constant superficial velocity of 0.88 (m/min). As the initial flux was higher, the rate of flux drop was higher. This was caused by increment of resistance of cake and gel layer (Rcg) onto the membrane surface. It was shown that surplus superficial velocity of 1.76 (m/min) had an adverse effect on permeate flux when the initial flux was 0.72 (m/day), by forming a firm fouling layer onto the membrane surface.Currently, the effect of sludge load in operation on permeate flux is been investigated.

在带有膜过滤的活性污泥过程中，可以实现完全的固定液体分离，并可以使用高有机负载的运行。尤其是，由于其节能和具有成本效益的性能，预计具有淹没膜分离的系统被认为是出色的膜分离系统。但是，尚未澄清影响该系统渗透通量的因素。进行了这项研究，以研究最初的操作渗透通量和气泡体积对系统中渗透通量的影响。气泡的强度表示为“表面速度”，定义为空气体积除以冒泡区域的横截面。此外，进行了批处理过滤测试，以研究膜结垢的机理。在运行开始时，permeate通量设置为0.18、0.36或0.72（m/day），恒定表面的表面速度为0.88（m/min）。由于初始通量较高，因此通量下降的速率较高。这是由于蛋糕和凝胶层（RCG）在膜表面上的耐药性的增加而引起的。结果表明，当初始通量为0.72（m/day）时，通过形成牢固的结垢层在膜表面上，盈余的浅表速度对渗透通量产生不利影响。目前，研究了污泥负荷在操作中的污泥负载对渗透通量的影响。

项目成果

岩城 洋武: "浸漬型膜分離法における膜透過フラックス低下に及ぼす影響因子の検討" 日本水環境学会年会講演集. 33. 264-264 (1993)

Hirotake Iwaki：“浸没式膜分离法中膜渗透通量降低的影响因素的研究”日本水环境学会年会论文集33. 264-264（1993）。

桃井 清至: "限外ろ過膜の膜透過流束に及ぼす生物代謝成分の影響" 用水と廃水. 41・4. (1999)

Kiyoji Momoi：“生物代谢成分对超滤膜渗透通量的影响”《水与废水》（1999）。

桃井 清至: "限界ろ過膜の膜透過流束に及ぼす生物代謝産物の影響"用水と廃水. 41・4. 292-298 (1999)

Kiyoji Momoi：“生物代谢物对超滤膜渗透通量的影响”水和废水41・4（1999）。

大川 諭: "浸漬型膜分離活性汚泥法における膜透過性能への曝気強度と汚泥負荷の影響"第17回 土木学会関東支部新潟会研究調査発表会論文集. 17. 271-272 (1999)

Satoshi Okawa：“浸没式膜分离活性污泥法中曝气强度和污泥负荷对膜渗透性能的影响”第17届日本土木学会新泻学会关东分会研究暨发表会议论文集17. 271-272（1999）。

大川 諭: "浸漬型膜分離活性汚泥法の処理特性の及ぼす諸因子の影響"第34回日本水環境学会年回講演集. 34. 152 (2000)

Satoshi Okawa：《各种因素对浸没式膜分离活性污泥法处理特性的影响》第34届日本水环境学会年会论文集34. 152 (2000)。