Nitrogen removal from wastewater using a double-biofilm reactor with a continuous-flow method.
Wastewater microorganisms of nitrification and denitrification were cultivated to compose two biofilm modules, termed the permeable support bioreactor (PSB) and the membrane feeding substrate bioreactor (MFSB). PSB and MFSB were combined in a single tank to develop a double-biofilm reactor, which was used to treat nitrogen contaminants in wastewater. With a membrane supplement of substrates (O(2) and CH(3)OH), the D.O. and COD levels were at a low value in the bulk solution thus inhibitive effects between nitrification and denitrification were minimized. Simultaneous nitrification/denitrification was conducted in the reactor and the double-biofilm reactor achieved high nitrification and denitrification efficiency, of 96.5% and 82%, respectively.
Hsieh
Yuan-Lynn
YL
Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Taipei 106, Taiwan, ROC. r7541101@ms.cc.ntu.edu.tw
Tseng
Szu-Kung
SK
Chang
Yu-Jie
YJ
D018441:Biofilms; D019149:Bioreactors; D008567:Membranes, Artificial; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism; D011142:Polyvinyl Alcohol / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements; D018508:Water Purification / Q000379:methods*
D008567:Membranes, Artificial; D011142:Polyvinyl Alcohol; D009584:Nitrogen