| Summary: | 碩士 === 國立中興大學 === 環境工程學系所 === 97 === In the surface water finite condition, Taiwan has to use ground water supply people to use. But the iron and the manganese widespread exist in ground water; usually bring persecution process ground water. Removal the iron and manganese, first processing is the reduction states ion to oxide ion become oxidization metal particle then carries on the liquid-solid separation. In recent years, the costs of membrane system have decreased significantly. The membrane system becomes an available choice for Taiwan water supply facility especially in the reason of space-save.
In this research by the Chang-hua water treatment plans’ ground water, after passing the aeration and the oxidation, by PTFE hollow fiber micro-filter experiment mold train carries on the separation the iron and the manganese oxidation particle, and compares benefit of by the greensand filtration.
After PTFE hollow fiber membrane filtration clear water (After membrane, AM), the iron’s concentration after undergoing manganese ore processing the situation is the same. But the manganese removal condition is difference. In experiment initial period, the surplus manganese density reaches as high as 0.066mg/L in the water after PTFE hollow fiber membrane filtration, Surpasses the water standard (0.05mg/L). But after one week operation, the surplus manganese concentration reduces gradually in the AM water. The manganese concentration drops to below 0.02 mg/L. We discovered that the existed iron-manganese sludge has acted the important role in hollow fiber. Observation and analysis by electron microscope and EDS, these sludge principal constituent is the iron and manganese, the manganese content is high. Explained outside the thin film iron and manganese sludge to provide a interception, precipitation, adsorption and oxidation space. Enables to have the very good elimination benefit including iron and manganese ground water.
|
|---|
