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Due to environmental considerations, the energy savings become an important topic in water treatment. Sludge digestion represents an easy way to create energy in a plant, but one of its major effects is the impact of the return effluent on the main wastewater liquid line treatment.
The contribution from the recycled digester supernatant to the plant influent may represent up to 20% of the total nitrogen load. This article presents the results obtained on a full-scale pilot plant processing supernatant coming from digested biosolids and implementing a deammonification
treatment. This process is economically very attractive as only a part of ammonia is oxidized to nitrite and deammnification without any external biodegradable carbon converts the residual ammonia and nitrite to nitrogen gas. Two major results are obtained. Deammonification was installed without
external biomass addition in a few months and this activity was very stable and well regulated over the one year pilot study.
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 These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.