This work aims to explore a novel intermittently operated fixed-bed column with drinking water treatment residuals (WTR) as main medium to remove nitrogen (N) and phosphorus (P) from secondary effluent under different hydraulic loading rates (HLRs). The results showed that the WTR was beneficial for N removal and the average removal efficiency reached 59%. The denitrification was the primary pathway for N removal and the denitrification rate (2.19 g N/m3 d) was higher than the theoretical value based on the organic matter removal rate (7.35 g CODcr/m3 d). The P removal was excellent and the efficiency still remained 98% after 260-day operation. The lifetime of the WTR fixed-bed column regarding P saturation was estimated to be 7.9 years under the highest HLR of 0.45 m3/m3 d. Moreover, the efficiency and stability of the nutrients removal further increased with the reduction of HLR. Based on regulations, the system holds great promise as a technology for water environment restoration and WTR recycling.
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Research Article|
April 29 2014
Nitrogen and phosphorus removal from secondary effluent using drinking water treatment residuals fixed-bed column with intermittent operation Available to Purchase
Leilei Bai;
Leilei Bai
1The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
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Changhui Wang;
Changhui Wang
1The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
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Yuansheng Pei
1The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China
E-mail: [email protected]
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Water Supply (2014) 14 (5): 812–819.
Article history
Received:
December 13 2013
Accepted:
April 09 2014
Citation
Leilei Bai, Changhui Wang, Yuansheng Pei; Nitrogen and phosphorus removal from secondary effluent using drinking water treatment residuals fixed-bed column with intermittent operation. Water Supply 1 October 2014; 14 (5): 812–819. doi: https://doi.org/10.2166/ws.2014.035
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