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Alternating shortcut nitrification-denitrification for nitrogen removal from soybean wastewater by SBR with real-time
Shu-ying Wang1, Da-wen Gao, Yong-zhen Peng
1Department of Environmental Engineering, Beijing Polytechnic University, Beijing 100022, China.
Abstract:
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.
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