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Author Pedrouso, A.; del Rio, AV.; Morales, N.; Vazquez-Padin, JR.; Campos, JL.; Mosquera-Corral, A.
Title Mainstream anammox reactor performance treating municipal wastewater and batch study of temperature, pH and organic matter concentration cross-effects Type
Year 2021 Publication Process Safety and Environmental Protection Abbreviated Journal Process Saf. Environ. Protect.
Volume 145 Issue Pages 195-202
Keywords Alkalinity; Autotrophic nitrogen removal; Inorganic carbon; Mainstream; Low temperature; Specific anammox activity
Abstract The anammox process is an energy efficient promising alternative to biologically remove the nitrogen. Thus, a 5-L anammox granular reactor was inoculated with sludge coming from a sidestream partial nitritation and anammox reactor (>200 mg TN/L and 30 degrees C) and it was directly subjected to 15 +/- 1 degrees C treating mimicked municipal wastewater (50 mg TN/L). Results indicated that an acclimation period (commonly used) to progressive reach the mainstream conditions is not needed, shortening the start-up periods. The long-term anammox process stability was proved to treat synthetic wastewater with decreasing alkalinities and nitritified primary settled municipal wastewater. The low pH values (6.2 +/- 0.1) of the municipal wastewater fed did not affect the process stability. Residual organic matter concentrations augmented the nitrogen removal efficiency from 80 % (with the synthetic medium) to 92 % achieving effluent concentrations below 10 mg TN/L. Finally, the effect of pH (6-8), temperature (15-30 degrees C) and organic matter concentration (0-75 mg TOC/L) over the specific anammox activity (SA(Amx)) was evaluated at short-term. pH and temperature and their interactions exerted significant influence on the SAAmx value while the TOC concentrations itself did not significantly change the SA(AMX). (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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ISSN 0957-5820 ISBN Medium
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Notes WOS:000604751700017 Approved
Call Number UAI @ alexi.delcanto @ Serial 1325
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