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已成为一个大问题。其中一些是致癌或致突变的。在滤水厂中，氯和有机物会产生有机卤化物。氯是饮用水消毒所必需的。降低原水中的有机物是解决有机卤化物污染的关键，为了降低原水中的有机物，本研究提出了降流式悬挂海绵方块反应器。反应堆长2米。海绵立方体由聚氨酯制成。该反应器采用叶霉病菌和玉米浆为原料，配制人工原水。水的总有机碳（TOC）为4 mg/l。水力停留时间（HRT）分别为3 h、6 h和12 h。在停留时间为3 h时，前10天内TOC去除率为18%，在停留时间为3 h时，前10天内TOC去除率为18%。前100天TOC平均降低率（HRT：3 h）为28%。从300 μ g/d到440 μ g/d的TOC平均降低率（HRT：3 h）为42%。在水力停留时间为6 h和12 h时，TOC也有所降低。但最有效的HRT为3 h。在3种HRT条件下，A260也降低。然而，该反应器比A260更有效地用于TOC。