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Study on Effective Nitrogen and Phosphor Removal by Carrier-added Activated Sludge Process

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Abstract:

With the objectives of improving nitrogen removal efficiency and reducing treatment time, we constructed a pilot plant for a two-step feed recycled nitrification/denitrification process with sponge carriers added, and conducted a series of nitrogen and phosphor removal performance tests. Results showed that we achieved our treated water target of 10 mg/L in total nitrogen content by setting carrier packing density at 30 v/v% and hydraulic retention time (HRT) at 6 hr. We replaced one of the anoxic tanks at the pilot plant inlet with an anaerobic tank, to investigate the plant's nitrogen and phosphor removal performance at a carrier packing density of 20 v/v% and HRT of 7 hr. Results showed that we were able to reduce total nitrogen content to our treated water target of 10 mg/L and total phosphor content to our treated water target of 1 mg/L.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864704784180578

Publication date: January 1, 2004

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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