Ammonium removal by partial nitritation and Anammox processes from wastewater with increased salinity

Autor: Jozef Trela, Myroslav Malovanyy, Andriy Malovanyy, Elzbieta Plaza
Rok vydání: 2014
Předmět:
Zdroj: Environmental Technology. 36:595-604
ISSN: 1479-487X
0959-3330
DOI: 10.1080/09593330.2014.953601
Popis: 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/(m2·day) (0.078 ± 0.038 kg N/m3·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.
Databáze: OpenAIRE
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