Effect of external carbon source and bed turnover rate on denitrificaion
This study investigated the effect of extemal carbon source and bed turnover rate on biological denitrification in the pilot-scale IPNR (Ilshin Phosphorus and Nitrate Removal) process.IPNR process is an up-flow reactor filled with Si-media which removes phosphorus physically and nitrate nitrogen biologically using secondary effluent from sewage treatment plant.Phosphorus (PO4-P) was removed using HFO (Hydrous ferric oxide) by adsorption as well as nitrate nitrogen (NO3-N) was transformed to nitrogen gas (Y2) by denitrifying bacteria using external carbon source in the same reactor.Methanol was used as an external carbon source for denitrification with various dosing concentration and Simedia bed turnover rate was varied from 6.4 ~ 7.75 day-1 The concentrations of PO4-P and NO3-N in the secondary effluent were from 0.1 to 1.75 mg/L and from 1.1 to 31.9 mg/L,respectively.The results demonstrated that high amount of NO3-N removed from 31.9 to 1.2 mg/L,at the same time PO4-P removed from 1.75 to 0.41mg/L using secondary effluent.Denitrification was found more stable with 6.4 bed turnover/day and 130% over dosing of theoretical methanol dose for denitrification.
denitrification carbon source bed turnover rate phosphorus removal
Jihee Song Younghee Kim Namjong Yoo
R&D Department Ilshin Environmental Engineering Co., Ltd.Seoul, Korea
国际会议
北京
英文
17-20
2012-10-26（万方平台首次上网日期，不代表论文的发表时间）