Some Issues by Algae on Water Supply in Tropical Country

藻类对热带国家供水的一些问题

• 批准号: 09041130
• 负责人: KONNO Hiroshi
• 金额: $ 0.9万
• 依托单位: TOHOKU INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09041130/
• 关键词: Algae; Coagulation-blocking; Filter clogging; Dual media filter; anthracite; 複層ろ過; 異臭水; 浄水障害

Water Quality of Water SourceRaw water turbidity is always higher than 50 NTU and is over than 150 NTU in rainy season. Average turbidity of raw water is around 80 NTU.The pH values of raw water are 7.3 to 7.7. The conductivity of raw water in September is the lowest, 200 mu s/cm and is the highest, 350 mu s/cm in February. The average conductivity is 270 mu s/cm and the thick soluble matter is contained.Algae in RiverThe predominant species of the kind of algae in Chao Phya river as water source for metropolitan area are Cyclotella sp., Melosira sp., Diatom, Oscillatoria sp., Euglena sp., Chiorella sp., Clotieriopsis sp., Clasteriom sp. and Scenedesmus sp.. The total cell number of algae is thousands on average per 100 ml on maximum number. The species over the 70 % of total algae is the kind of affecting the filter clogging. It, therefore, comes as no surprise that the filter clogging problem becomes actual issue at once.Treatability of AlgaeThe removal rate for algae is around 60 % … More on average and is sometimes lower than 40 % in spite of getting high removal rate, 98 % for turbidity. It will be estimated to occur the some issues in distribution and service pipelines.Algae in LakesIn Payao lake, which has 18 km^2 in area and 1.8 m in average depth, in Thailand, at least all problems caused by algae will be occurred in the future though the existence of algae which affect the problem does not the occurrence of obstruction on same time. Now Thai people have no usage to drink tap water directly. Odour, toxic substances, soluble aluminium and THM problem in tap water may be no relation for Thai people and waterworks. However, coagulation blocking and sand filter clogging is deeply related to water treatment process and system.In the water source such as river and lake in Thailand, the kind of species closely related to some issues caused by algae are observed. It will be occurred serious problem on waterworks in Thailand. The examination of algae in Thailand should be continued for not only the maintenance of water quality of water source but also for better operation of water purification process and system. Less

水源水质的水质总是高于50 NTU，雨季的水质超过150 NTU。原水的平均浊度约为80 NTU。原水的pH值为7.3至7.7。 9月生水的电导率是最低，200 mu s/cm，是2月最高的350 mu s/cm。平均电导率为270 mu s/cm，固体物质厚度为厚。藻类的总细胞数量为每100毫升的最大数量为数千个。总藻类70％以上的物种是影响过滤器堵塞的种类。因此，毫不奇怪的是，过滤器杂物问题立即成为实际问题。藻类的藻类去除率的处理能力约为60％……平均水平较高，尽管有高度删除率，但有时低于40％，而浊度为98％。据估计，在分配和服务管道方面会出现一些问题。湖泊佩亚湖的algea，面积为18 km^2，平均深度为1.8 m，在泰国，至少将来会出现藻类引起的所有问题，尽管藻类的存在会影响该问题的存在并不是同一时间的客观发生。现在，泰国人没有直接喝自来水的用法。自来水中的气味，有毒物质，可溶性铝和THM问题可能与泰国人和水工厂无关。然而，凝血阻塞和砂过滤器堵塞与水处理过程和系统密切相关。这将是泰国水厂的严重问题。不仅要维持水源的水质，而且还应更好地运行水净化过程和系统，还应继续检查泰国藻类的检查。较少的

项目成果

Siwilai Kijipituk, Naomasa ODA,Hiroshi KONNO et al: "Obvervation of Algae Affecting with Some Issues on Water Treatment in Thailand" Proc.of National Water Works Conference. Vol.50. (1999)

Siwilai Kijipituk、Naomasa ODA、Hiroshi KONNO 等：“藻类对泰国水处理的一些问题的影响观察”，全国水务会议论文集。

今野 弘: "タイの水道の現状と展望" 水環境学会誌. Vol.21,No.2. 72-75 (1998)

Hiroshi Konno：“泰国供水现状与展望”，日本水环境学会杂志，第 21 卷，第 72-75 期（1998 年）。

H.KONNO: "Waterworks in Thailand" Journal of Japan Society of Water Environment. Vol.21, No.2. 71-75 (1998)

H.KONNO：日本水环境学会杂志《泰国的自来水厂》。

今野弘: "タイの水道の現状と展望" 水環境学会誌. Vol.21 No.2. 72-75 (1998)

Hiroshi Konno：“泰国供水现状和前景”水环境学会杂志第 21 卷第 72-75 期（1998 年）。

Siwilai Kijipitak 小田直正・今野弘他: "Observation of Algae Affecting with some Issues on Water Treatment in Thailand" Proc.of National Water Works Conference. Vol.50. (1999)

Siwilai Kijipitak Naomasa Oda、Hiroshi Konno 等人：“藻类影响泰国水处理的一些问题”，国家水务会议第 50 卷。