Development of Sanitary Treatment Methods of Membrane Wash Wastewater from Drinking Water Purification Plant

饮用水净化厂膜冲洗废水卫生处理方法的开发

• 批准号: 07505028
• 负责人: FUJITA Kenji
• 金额: $ 8.32万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07505028/
• 关键词: membrane filtration; micro-filtration; membrane wash wastewater; sludge concentration; coli phage; membrane breakage; fouling materials of membrane; electrolytic coagulation; 膜洗浄; 膜洗浄排水処理; 大腸菌; 浄水処理; 膜分離; 分子量分画

Evaluation of safety aspects of microorganisms in membrane wash wastewater : Using bacteria and coli phage as index of microorganisms, their removal performance by membrane filtration, concentration in the membrane wash wastewater and entrapped amount insid the membrane were investigated. The bacteria and larger size phage were almost separated by micro-filter and they were flushed out to the washing wastewater. The phage, Q beta , which was smaller than the pore size of membrane, was partially removed by MF but the separated phage was not whole discharged to the wash water.Thickening of membrane washing wastewater : Three types of thickening method, that is electrolytic coagulation/settlement, granular filtration, and settling/membrane filtration were investigated. The settling/membrane filtration could produced as good quality filtered water as drinking water. The electrolytic coagulation/settlement process could discharge the highest concentrated sludge. Higher concentrated sludge w … More as obtained with the iron anode than the aluminum anode, and better supernatant quality was gotten with the aluminum anode than the iron anode. The granular filtration was inferior to the other methods in both the separated water quality and the sludge concentration.The membrane filtration technology considering washing process : It happens in outside-in mode hollow fiber membrane filtration that the sludge accumulates around and between the membrane fibers. The inter fiber clogging was caused under the condition of lower flow rate than critical cross flow speed. The critical cross flow speed was 0.7m/s and shear strength at the speed was estimated 200Pa.Membrane filtration with pilot scale plant : Actual raw water was applied for the polyethylene micro-filter membrane filtration. Sterilization such as chlorimation, ozonation or ultra-violet radiation before filtration were efficient to reduce trance membrance pressure rising. The substances separated by membrane and chemical washing wastewater contained polysaccharide, protein, peptide, and amino as well as polycyclic-ring aromatic compounds. Less

膜清洗废水中微生物的安全性评价：以细菌和大肠杆菌噬菌体为微生物指标，考察膜过滤对它们的去除性能、膜清洗废水中的浓度以及膜内的截留量。细菌和较大尺寸的噬菌体几乎被微过滤器分离，并被冲出到洗涤废水中。小于膜孔径的噬菌体 Q beta 被 MF 部分去除，但分离的噬菌体并未全部排放到洗涤水中。 膜洗涤废水的浓缩：研究了三种类型的浓缩方法，即电解混凝/沉降、颗粒过滤和沉降/膜过滤。沉降/膜过滤可以产生与饮用水一样优质的过滤水。电解混凝/沉降工艺可以排放最高浓度的污泥。使用铁阳极比使用铝阳极获得更高浓度的污泥，并且使用铝阳极比使用铁阳极获得更好的上清液质量。颗粒过滤无论是分离水质还是污泥浓度都比其他方法差。 考虑洗涤过程的膜过滤技术：在由外向内的中空纤维膜过滤中，污泥堆积在膜纤维周围和膜纤维之间。纤维间堵塞是在流速低于临界横流速度的情况下引起的。临界横流速度为0.7m/s，该速度下的剪切强度估计为200Pa。 中试规模装置的膜过滤：将实际原水用于聚乙烯微滤膜过滤。过滤前的消毒，如氯化、臭氧或紫外线辐射，可有效降低催眠膜压力的上升。膜分离和化学清洗废水中的物质含有多糖、蛋白质、肽、氨基以及多环芳香族化合物。较少的

项目成果

大瀧 雅寛: "膜処理プラントにおける高濃度ウィルス・ファージの除去特性に関する研究" 第48回全国水道研究発表会講演集. 48・. 226-227 (1997)

大木正博：“膜处理厂中高浓度病毒和噬菌体的去除特性研究”第48届全国供水研究会议论文集48・227（1997年）。

Shinichiro, Ohgaki, and etal: "Theoretical analysis of phenomenon to suppress the trance membrane pressure with ultra-violet radiation in membrane separation process" Proc.of Environmental Engineering Research. Vol.32. 63-65 (1995)

Shinichiro、Ohgaki 等人：“膜分离过程中利用紫外线辐射抑制恍惚膜压力现象的理论分析”Proc.of Environmental Engineering Research。

Lee, Soc Hyon, and etal: "Virus separation performance of micro-filtration in drinking water treatment process" Proc.of Environmental Engineering Research. Vol.32. 66-68 (1995)

Lee、Soc Hyon 等人：“饮用水处理过程中微过滤的病毒分离性能”Proc.of Environmental Engineering Research。

Takahashi, Katsuo, and etal: "Leakage characteristics of E-coli and coliphages in externally pressuirzed hydrophilic hollow fiber MF membranes" J.of Japan Water Works Ass. Vol.66, No.9. 16-26 (1997)

Takahashi、Katsuo 等人：“外部加压亲水性中空纤维 MF 膜中大肠杆菌和大肠杆菌噬菌体的泄漏特性”J.of Japan Water Works Ass。

Lee, Byung Ho, and etal: "Treatment of membrane wash wastewater from drinking water treatment plant" Annual Conf.of 51th Japan Society of Civil Engineers. Vol.51-7. 202-203 (1996)

Lee、Byung Ho 等人：“饮用水处理厂膜清洗废水的处理”第 51 届日本土木工程师学会年度会议。