Alternating shortcut nitrification-denitrification for nitrogen removal from soybean wastewater by SBR with real-time control.
A novel treating technology for nitrogen removal from soybean wastewater was studied. The process for nitrogen removal was achieved by alternating aeration and mixing, combined with real-time control strategies. Results showed that the COD and total nitrogen removal rates are more than 90% and 92% at COD and total nitrogen loads of 1.0 - 1.2 kg COD/(kgMLSS x d) and 0.20 - 0.27 kg TN/(kgMLSS x d), respectively. In addition, it could improve sludge settling property. SVI value is less than 70 g/ml during the whole cycles. The method not only may be adapted to treat soybean wastewater with high nitrogen, but also may be applied to treat other high nitrogen wastewater.
Department of Environmental Engineering, Beijing Polytechnic University, Beijing 100022, China.
Shu-ying
SY
Wang
Da-wen
DW
Gao
Yong-zhen
YZ
Peng
Peng
P
Wang
Qing
Q
Yang
D001331:Automation; D019149:Bioreactors; D009584:Nitrogen / Q000302:isolation & purification*; D013025:Glycine max; D014865:Waste Disposal, Fluid / Q000379:methods*
D009584:Nitrogen