[Removing nitrate-nitrogen from wastewater using rotten wood as carbon source].
In this research, COD release of rotten wood was studied and rotten wood was investigated as the sole carbon source as well as biofilm carrier to remove nitrate from wastewater in up-flow laboratory reactor. The experimental results indicated that rotten wood could release carbon source continuously. COD released of rotten wood inoculated with humus was 2. 3 times higher than that of sterilized rotten wood, and VFA was 5 times. The research of denitrification was carried out at 25 degrees +/- 1 degrees C, 30 mg/L of initial NO3(-) -N concentration and 12 h of hydraulic retention time. Nitrate removal efficiency was above 80%. A time-dependent decrease in nitrate removal efficiency was observed after 46 days of operation. The results showed that rotten wood could be used as an effective carbon source for denitrification.
Sun
Ya-Li
YL
Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. yali.sun99@gmail.com
Zhang
Guo-Chen
GC
Yan
Zhong
Z
Li
Xiu-Jin
XJ
Wang
Kai-Jun
KJ
D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism*; D009566:Nitrates / Q000302:isolation & purification* / Q000378:metabolism; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism; D014934:Wood / Q000378:metabolism*
D009566:Nitrates; D014874:Water Pollutants, Chemical; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen