1. Long-term operation with an insight into a newly established green bio-sorption reactor: Can it achieve “1 + 1 > 2”?
- Author
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Liu, Ranbin, Zhao, Yaqian, Wang, Tong, and Shen, Cheng
- Subjects
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CONSTRUCTED wetlands , *ACTIVATED sludge process , *NITRIFICATION , *DENITRIFICATION , *BIOREACTORS , *ECOLOGICAL engineering - Abstract
An eco-friendly system of green bio-sorption reactor (GBR), constructed by embedding alum sludge-based constructed wetland (AlCW) into a conventional activated sludge process to achieve “1 + 1 > 2”, was evaluated under a long-term operation basis. Insight into the pollutants removal, particularly the role of the AlCW in the GBR, was explored and discussed. The results showed that the GBR could achieve 90% and 95% removal for TN and TP (Stage 4), respectively, under the hydraulic and nitrogen loading rate of 2.07 m 3 /(m 3 ·d) and 166.2 gN/(m 3 ·d), respectively. Intriguingly, despite the P adsorption, the AlCW enlarged the size of the activated sludge flocs which benefited the simultaneous nitrification and denitrification. Subversively, the embedding AlCW brings about dual-intensification in both capacity and efficiency. In addition, the GBR as an ecological engineering system can be employed closely to residential area in line with its green and pleasing appearance. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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