Carbon-nitrogen removal in a structured-bed reactor (SBRRIA) treating sewage: Operating conditions and metabolic perspectives.

Autor: Moura RB; Institute of Science and Technology, Federal University of Alfenas, Rod. José Aurélio Vilela, 11999, Cidade Universitária, 37715-400, Poços de Caldas, MG, Brazil; Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering, University of São Paulo (EESC/USP), Av. João Dagnone 1100, 13563-120, São Carlos, SP, Brazil. Electronic address: rafael.moura@unifal-mg.edu.br., Santos CED; Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering, University of São Paulo (EESC/USP), Av. João Dagnone 1100, 13563-120, São Carlos, SP, Brazil., Okada DY; School of Technology, University of Campinas, Rua Paschoal Marmo, 1888, 13484-332, Limeira, SP, Brazil., Martins TH; Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering, University of São Paulo (EESC/USP), Av. João Dagnone 1100, 13563-120, São Carlos, SP, Brazil., Ferraz Júnior ADN; Brazilian Bioethanol Science and Technology Laboratory (CTBE), Brazilian Center for Research in Energy and Materials (CNPEM), Rua Giuseppe Máximo Scolfaro 10000, 13083-970, Campinas, SP, Brazil., Damianovic MHRZ; Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering, University of São Paulo (EESC/USP), Av. João Dagnone 1100, 13563-120, São Carlos, SP, Brazil., Foresti E; Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering, University of São Paulo (EESC/USP), Av. João Dagnone 1100, 13563-120, São Carlos, SP, Brazil.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2018 Oct 15; Vol. 224, pp. 19-28. Date of Electronic Publication: 2018 Jul 18.
DOI: 10.1016/j.jenvman.2018.07.014
Abstrakt: The present study evaluated the efficiency of a structured-bed reactor subjected to recirculation and intermittent aeration (SBRRIA) to promote nitrogen and carbon removal from domestic sewage. The intermittent aeration and the recycling rate of 3 keeps the desired mixing degree inside the SBRRIA. Four different operational conditions were tested by varying the hydraulic retention time (HRT) from 12 to 8 h and aerated and non-aerated periods (A/NA) from 2 h/1 h and 3 h/1 h. At the THD of 8 h and A/NA of 2 h/1 h there was a decrease in the nitrification process (77.5%) due to the increase of organic matter availability, affecting the total-N removal performance. However, by increasing the aerated period from 2 h to 3 h, the nitrification efficiency rose to 91.1%, reaching a total-N removal efficiency of 79%. The system reached a maximum total-N loading removed of 0.117 kgN.m -3 .d -1 by applying an HRT of 8 h and an intermittent aeration cycle of 3 h, aerated and 1 h non-aerated. The simultaneous nitrification and denitrification (SND) process was related to a complex interplay among microorganisms affiliated mostly to Acidovorax sp., Comamonas sp., Dechloromonas sp., Hydrogenophaga sp., Mycobacterium sp., Rhodobacter sp., and Steroidobacter sp.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: