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，其中一些有机卤化物是由水过滤装置中的氯和有机物产生的，氯对于减少饮用水中的有机物是必要的。为了减少原水中的有机物，本研究提出了下流式悬挂式海绵反应器，反应器长2m。海绵立方体由聚氨酯制成，立方体的每边长为1.5厘米。该反应器的人造原水为4毫克/升。采用处理前后的水力停留时间（HRT）（3小时、6小时和12小时）测量TOC和A260来评价反应器的效率。 3 小时后，前 10 天 TOC 降低 18%。 前 100 天 TOC 平均降低率（HRT：3 小时）为 28%。从第 300 天开始，TOC 平均降低率（HRT：3 小时）。第 440 天到第 1 天的 HRT 为 6 小时和 12 小时，TOC 为 42%。然而，在 3 种条件下，A260 的 HRT 也降低了，但反应器的 TOC 效率比 A260 更高。