Field Study on Dephosphorization for Rural Sewage Treatment

农村污水处理除磷现场研究

• 批准号: 62460205
• 负责人: TAKAHASHI Tsuyoshi
• 金额: $ 0.32万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460205/
• 关键词: Dephosphorization; Iron Filter; Contact aeration method; Rotary disc method; 回分式間欠曝気法; 回転円移法

In order to develop the new treatment method of phosphorous using submerged iron filter, adaptable to the small-scale sewage treatment plants such as those of rural community, field expeiments were carried out in three practical treatment plants of different systems.1.Application to contact aeration method at Hirayama districtIn the first experiments, 1160 pieces of iron filter were submerged in the contact aeration tank. Iron ion was desolved from the iron filter with bacteria corrosion according to the growth of biological menbrane, and then the stable dephosphorization was achieved.In the second, in which 2400 pieces of iron filter were submerged in anaerobic tank, phosphorous removal rate was gradually decreased by the blockage of biological menbrane.2. Application to rotary disc method at Hanami districtIn this plant, 60 sheets of plastic discs were replaced by the iron discs. Although the phosphorous concentration of treated water in plastic discs was 4.1 mg/1 in average, that of iron discs was 2.2 mg/1 in average, and the average removal rate was 53% during 1.5 years after replacing iron discs.3. Application to intermittent aeration method at jyouanji districtThe phosphorous concentration of treated water from the tank without iron filter was remarkably fluctuated month by month. But those from the tank with submerged iron filter were almost always less than 1 mg/1. The average removal rate was between 60 and 80% in the period of experiment. Submerged iron filter did not show any detrimental influences on high rate removal of BOD, COD and that of nitrogen.

为了开发适用于农村社区等小型污水处理厂的沉铁滤池处理磷的新方法，在3个不同系统的实际污水处理厂进行了现场试验。接触曝气法在平山地区的应用在第一次试验中，将1160块铁滤芯浸入接触曝气池中。根据生物膜的生长情况，通过细菌腐蚀将铁离子从铁滤池中溶解出来，实现稳定脱磷。在厌氧池中浸没2400块铁滤池，由于生物膜的堵塞，磷的去除率逐渐降低。转盘法在花见地区的应用。该厂用铁盘代替了60片塑料盘。塑料圆盘中处理水的磷浓度平均为4.1 mg/1，铁圆盘中处理水的磷浓度平均为2.2 mg/1，更换铁圆盘后1.5年的平均去除率为53%。间歇曝气法在济济市的应用表明，不加铁滤池处理后的水磷浓度逐月波动较大。而在装有浸没式铁过滤器的水箱中，汞含量几乎总是低于1mg /1。实验期间平均去除率在60% ~ 80%之间。浸没铁滤池对BOD、COD和氮的高速率去除率无不利影响。