Abstract
Compared biological sand filtration system with conventional water treatment, taking micro-polluted water river as source water. The results show that biological filtration system is excelled to conventional water treatment, the removal rate of CODMn, NH4+-N, chromaticity and turbidity is 34~56％, 78.7~92%, 53~68%, 90% by biological sand filtration system; however, the removal rate of CODMn, NH4+-N, chromaticity and turbidity is only 11~30%, 4.7~25%, 38~54%, 60~80% by the conventional water treatment and the remval effection is instability; therefore, biological filtration system is pertinency and feasibilty in the micro-polluted source water.
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