Study on control of micro-pollutants by BAC filtration.
The objective of this research was to evaluate removal efficiency of micro-pollutants in a BAC filter that followed ozonation for long term operation. The experimental results showed that after continuous operation for one year BAC filter still maintained a removal of 15 approximately 20% for COD(Mn) and 20 approximately 30% of removal for UV(254). Correlative analysis based on lots of data found that empty bed contact time (EBCT) instead of flow rate could obviously impact on removal effect of micro-pollutants in BAC filter. And the optimal relationship between EBCT and removal effect of micro-pollutants for BAC filter was logarithm. On the other hand, long term running of BAC filter proved that there was a good removal of chloroform formation potential, but the removal of brominated trihalomethane formation potential decline with further bromization, even there appeared to be formation of bromoform in BAC filter.
Zhang
Z H
ZH
Department of Environmental Engineering, Tianjin Polytechnic University, No. 63 Chenglin Road, Hedong District, Tianjin 300160, Republic of China. zzh7448@126.com
Shao
L
L
D002606:Charcoal / Q000737:chemistry; D005374:Filtration / Q000295:instrumentation / Q000379:methods; D010126:Ozone / Q000737:chemistry; D015203:Reproducibility of Results; D022882:Trihalomethanes / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
D022882:Trihalomethanes; D014874:Water Pollutants, Chemical; D002606:Charcoal; D010126:Ozone