Study on the Treatment of Iron and Manganese in Groundwater by Micro-Filtration System

• Main Authors: Wen-Hsiang Chen, 陳文祥
• Other Authors: Yung-Hsu Hsieh
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/27740464631929461294

博士 === 國立中興大學 === 環境工程學系所 === 99 === Fe and Mn are commonly found in underground, causing problems when treating groundwater. The removal process must first oxidize reduced ions into oxide particles, and then perform solid-liquid separation. This study sampled groundwater from water treatment plant in Changhua, containing Fe (0.4mg/L) and Mn (0.5mg/L), and separated the Fe and Mn oxide particles with PTFE hollow fiber micro-filter module after aeration and chlorine oxidation. The performances were compared to traditional greensand filtering. The results showed that the residual concentration of Fe in treated water was almost the same in two processes, but the removal of Mn varied greatly. Initially, the concentration of remaining Mn after MF was over 0.1mg/L, which was higher than the water quality standard (0.05mg/L), but after two weeks of operation, Mn in treated water was gradually decreased to below 0.01mg/L. It reveals that the Fe-Mn sludge, next to all hollow fibers, plays an important role. PTFE hollow fiber membrane modue operated under low pressure showed a low fouling trend.