OPTIMIZATION OF REGIONAL ADVANCED DRINKING WATER TREATMENT SYSTEM BASED ON THE CHARACTERIZATION OF HUMIC SUBSTANCES

基于腐殖质表征的区域先进饮用水处理系统优化

• 批准号: 10044161
• 负责人: OKADA Mitsumasa
• 金额: $ 3.58万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10044161/
• 关键词: humic substances; characterization; ozone; activated carbon; coagulant; advanced oxidation process; Moringa oleifera; 親水性; 生分解性; 高度浄水処理; 消毒副生成物; アミン; オゾン処理

This study was carried out to develop optimization procedure for advanced drinking water treatment system from raw water containing humic substances characteristic to regions. Aquatic humic substances were characterized based on adsorption to activated carbon, modified natural materials, oxidation, and biological treatment. Specific conclusions are as follows ;(1) Humic substances in Minaga Reservoir were characterized by hydrophobicity, molecular structure and size. Ozonation followed by biological treatment reduced hydrophobic organics and increased non-biodegradable organics. Repeated ozonation/advanced oxidation followed by biological treatment could remove humic substances in water.(2) New coagulant was developed from seeds of Moringa oleifera produced in Philippines. Simple purification procedure was developed and the coagulant showed similar performance as those in commercial ones. The coagulation was based on the net-structured substances in the extract.(3) A pilot plant with conventional drinking water treatment system followed by activated carbon treatment and ozonation was constructed in Minaga Reservoir, Hiroshima, and behavior of aquatic humic substances was studied. Low molecular aquatic humic substances and calcium in water reduced adsorption capacity of trace organic substances by activated carbon. However, it took more than 5 years for saturation indicating stable removal even in biological activated carbon.

本研究旨在开发具有腐殖质特征的原水到地区的高级饮用水处理系统的优化程序。从吸附活性炭、改性天然材料、氧化和生物处理等方面对水生腐殖质进行了表征。具体结论如下：(1) Minaga水库腐殖质具有疏水性、分子结构和大小特征。臭氧化后的生物处理减少了疏水有机物和增加了不可生物降解的有机物。重复臭氧化/深度氧化后生物处理可去除水中腐殖质。(2)以菲律宾产辣木种子为原料研制新型混凝剂。开发了简单的纯化工艺，混凝剂的性能与市售混凝剂相当。混凝是基于提取物中的网状结构物质。(3)在广岛Minaga水库建立了常规饮用水处理+活性炭+臭氧氧化的中试装置，研究了水体腐殖质的行为。低分子水生腐殖质和水中钙降低了活性炭对微量有机物的吸附能力。然而，达到饱和需要5年以上的时间，这表明即使在生物活性炭中也能稳定去除。

项目成果

M.Hashino: "Pilot plant evaluation of an ozone-microfiltration system for drinking water treatment"Water Science and Technology. 41(10-11). 17-23 (2000)

M.Hashino：“用于饮用水处理的臭氧微滤系统的中试工厂评估”水科学与技术。

S.H.Lee: "Simazine adsorption characteristics of biological activated carbon saturated with NOM"Japan Journal of Water Environment. 23(9)(in Japanese). 579-583 (2000)

S.H.Lee：“NOM饱和生物活性炭的西玛津吸附特性”日本水环境杂志。

Tetsuji Okuda: "Isolation and characterization of coagulant extracted from Moringa Oleifera seed by salt solution."Water Research. 35・2. 405-410 (2001)

Tetsuji Okuda：“通过盐溶液从辣木种子中提取的凝固剂的分离和表征。”水研究 35・2（2001）。

T.Okuda: "Isolation and characterization of coagulant extracted from Moringa oleifera seed by salt solution"Water Research. 35(2). 405-410 (2001)

T.Okuda：“通过盐溶液从辣木种子中提取的凝固剂的分离和表征”水研究。

Tetsuji Okuda: "Extraction characteristics and coagulation mechanism of salt solution-extracted active component in Moringa Oleifera seeds"Water Research. 35・3. 163-167 (2001)

Tetsuji Okuda：“辣木种子中盐溶液提取的活性成分的提取特性和凝固机制”水研究35・3（2001）。