Development of organic matter removal Down-flow Hanging Sponge-cubes reactor for drinking water treatment

饮用水处理用下流式悬挂式海绵块反应器的研制

• 批准号: 10650548
• 负责人: ARAKI Nobuo
• 金额: $ 1.92万
• 依托单位: Nagaoka College 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-10650548/
• 关键词: Organic matter; Organo-halides; Down-flow Hanging Sponge-cubes reactor; 低栄養細菌; 変異原性; ゼラチン層

Pollution of tap water by Organo-halides becomes a big problem. Some of them are carcinogenic or mutagenic. Organo-halides are generated from chlorine and organic matter in water filtering plant. Chlorine is necessary for disinfecting of drinking water. Reduction of organic matter in raw water would solve the organo-halides pollution.In order to reduce organic matter in raw water, Down-flow Hanging Sponge-cubes reactor was proposed in this research. The reactor was 2m long. The sponge-cubes were made of urethane. Each side of the cubes was 1.5cm long.Artificial raw water was made from leaf mold and corn steep liquor for this reactor. Total organic carbon (TOC) of the water was 4mg/l. 3 conditions of hydraulic retention time (HRT), which were 3h, 6h and 12h, were adopted. TOC and A260 were measured before and after treatment to evaluate the efficiency of the reactor.At the retention time of 3h, in the first 10 days 18% of TOC was reduced. The average reduction rate (HRT : 3h) of TOC in the first 100 days was 28%. The average reduction rate (HRT : 3h) of TOC from 300ィイD1thィエD1 day to 440ィイD1thィエD1 day was 42%. At the HRT of 6h and 12h, TOC was also reduced. However, the most efficient HRT was 3h. At the 3 conditions HRT, A260 was also reduced. However, the reactor was more efficient for TOC than A260.

有机卤化物对自来水的污染成为一个大问题。其中一些是致癌或诱变的。有机卤化物是由滤水厂中的氯和有机物产生的。氯是对饮用水消毒所必需的。在原始水中减少有机物的有机物可以解决有机物污染。为了减少原始水中的有机物，在这项研究中提出了下流悬挂的海绵立方体反应堆。反应堆长2m。赞助商是由氨基甲酸酯制成的。立方体的每一侧长1.5厘米。人造生水由该反应堆的叶片和玉米钢液体制成。水的总有机碳（TOC）为4mg/l。采用了3个水解保留时间（HRT）的3个条件（HRT），分别为3H，6H和12H。在处理前后测量TOC和A260以评估反应器的效率。时间为3H，在最初的10天中，TOC的18％减少了。前100天TOC的平均降低率（HRT：3H）为28％。 TOC的平均降低率（HRT：3H）从300 d1thie D1天增加到440 D1thie D1天为42％。在6h和12h的HRT时，TOC也减少了。但是，最有效的HRT是3H。在3个条件下，HRT也减少了A260。但是，反应器对于TOC比A260更有效。