Nitrogen removal rates at a technical-scale pilot plant with the one-stage partial nitritation/Anammox process.
2006 (English)In: Water Science and Technology, ISSN 0273-1223, Vol. 54, no 8, 209-217 p.Article in journal (Refereed) Published
Traditional nitrification/denitrification is not suitable for nitrogen removal when wastewater contains high concentrations of ammonium nitrogen and low concentrations of biodegradable carbon. Recently, a deammonification process was developed and proposed as a new technology for treatment of such streams. This process relies on a stable interaction between aerobic bacteria Nitrosomonas, that accomplish partial nitritation and anaerobic bacteria Planctomycetales, which conduct the Anammox reaction. Simultaneous performance of these two processes can lead to a complete autotrophic nitrogen removal in one single reactor. The experiments where nitrogen was removed in one reactor were performed at a technical-scale moving-bed pilot plant, filled with Kaldnes rings and supplied with supernatant after dewatering of digested sludge. It was found that a nitrogen removal rate obtained at the pilot plant was 1.9 g m(-2) d(-1). Parallel to the pilot plant run, a series of batch tests were carried out under anoxic and aerobic conditions. Within the batch tests, where the pilot plant's conditions were simulated, removal rates reached up to 3g N m(-2) d(-1). Moreover, the batch tests with inhibition of Nitrosomonas showed that only the Anammox bacteria (not anoxic removal by Nitrosomonas) are responsible for nitrogen removal.
Place, publisher, year, edition, pages
2006. Vol. 54, no 8, 209-217 p.
Anammox; CANON; deammonification; digested supernatant; nitrogen removal
IdentifiersURN: urn:nbn:se:kth:diva-7380DOI: 10.2166/wst.2006.816ISI: 000242677200025ScopusID: 2-s2.0-33845288661OAI: oai:DiVA.org:kth-7380DiVA: diva2:12387
QC 20100707. Conference: 5th World Water Congress of the International-Water-Association. Beijing, PEOPLES R CHINA. SEP 10-14, 20062007-07-132007-07-132011-09-29Bibliographically approved