Ammonium removal by partial nitritation and Anammox processes from wastewater with increased salinity
2015 (English)In: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 36, no 5, 595-604 p.Article in journal (Refereed) Published
This work is dedicated to the biological treatment of wastewater with increased salinity using a combination of partial nitritation and Anammox processes. Two one-stage deammonification moving bed biofilm reactors were operated with the increase in NaCl concentration every two weeks by 5 and 2.5 g/L. The strategy with a step of 5 g/L of salinity increase led to complete inhibition of the process at the salinity level of 15 g/L. The strategy with a step of 2.5 g/L gave possibility to adapt bacteria to the elevated salinity. After reaching the salinity level of 10 g NaCl/L, the reactor was operated during 92 days with a nitrogen removal rate of 0.39 +/- 0.19 g N/(m(2)center dot day) (0.078 +/- 0.038 kg N/m(3)center dot day) and an average nitrogen removal efficiency of 59%. It was shown that conductivity cannot be used for monitoring the process when a reactor is treating wastewater with increased salinity, whereas pH can be correlated to effluent ammonium concentration regardless of wastewater salinity.
Place, publisher, year, edition, pages
2015. Vol. 36, no 5, 595-604 p.
activity, wastewater, Anammox, nitrification, ammonium
IdentifiersURN: urn:nbn:se:kth:diva-160359DOI: 10.1080/09593330.2014.953601ISI: 000348672000006ScopusID: 2-s2.0-84964240162OAI: oai:DiVA.org:kth-160359DiVA: diva2:791222
QC 201502272015-02-272015-02-192015-02-27Bibliographically approved