Treament of Polluted Natural Drains by Contact Aeration Channel Process

• Main Authors: HauLung Pan, 潘豪龍
• Other Authors: Chin-Kuan Wen
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/26073846758443688622

碩士 === 國立成功大學 === 環境工程學系 === 88 === Domestic wastewater has been a major pollution source of the rivers in Taiwan due to the lack of sewage system. The polluted natural drains can be clarified by self-purification process, however the natural self-purification rate is very limited. For researching the enhanced purification process to reduce the loading in the drains and the rivers, a pilot scale of contact aeration channel process was settled at the riverside of Dar-Chow drainage. The best operation condition is required in order to find the designing parameters and the removal model. Two architect channels filled with bio-cord and honeycomb-medium respectively were aerated to maintain the channels under aerobic condition. The result shows that the best operation was under the HRT of 4 hours as the filling ratio of the bio-cord and the honeycomb are 38% and 50% respectively, meanwhile the removal rate of SS, BOD, COD and NH3-N were 40~60%, 65~80%, 36~43% and 34~47%. The nitration rate was 46~57%. This also shows that the contact aeration channel process can provide a successful experience of reducing the pollution in rivers.