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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparison between two different fixed-bed reactor configurations for nitrogen removal coupled to biogas biodesulfurization

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Author(s):
Solcia Guerrero, Renata de Bello [1] ; Diniz dos Santos, Carla Eloisa [2] ; Soares, Lais Americo [1] ; Zaiat, Marcelo [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Ctr Res Dev & Innovat Environm Engn, Sao Carlos Sch Engn, Biol Proc Lab, EESC, Av Joao Dagnone 1100, BR-13563120 Sao Carlos, SP - Brazil
[2] Fed Univ Triangulo Mineiro UFTM, Environm Engn Dept, Av Randolfo Borges Jr 1400, BR-38064200 Uberaba, MG - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Biochemical Engineering Journal; v. 162, OCT 15 2020.
Web of Science Citations: 0
Abstract

A comparison between a mixed aerobic-anoxic horizontal fixed-bed reactor (MAAFBR) and an aerobic horizontal fixed-bed reactor coupled with an anoxic vertical fixed-bed reactor (AHFBR-AVFBR) was made in order to evaluate the nitrogen removal behavior when nitrification and sulfide-driven autotrophic denitrification occurred in a single unit or spatially separated. Both systems achieved Total-N removal efficiencies (RE) higher than 89 %. Moreover, for both reactors, the effluent pH was affected for bicarbonate alkalinities lower than 250 mg CaCO3 L-1 decreasing the biogas desulfurization from 98 to 50 % in the MAAFBR and from 100 to 61 % in the AVFBR. Hydraulic retention times (HRTs) of 6, 8, 10 and 12 h did not affect the nitrification RE on the AHFBR, maintaining values higher than 99 %. In both cases, biogas desulfurization was achieved. However, results suggested that elemental sulfur (S-0) was not predominantly formed due to the interference of oxygen. Such interference was more severe for the MAAFBR, in which the results implied diffusion of O-2 and H2S between the aerobic and anoxic chambers. (AU)

FAPESP's process: 15/18976-0 - WASTEWATER POST-TREATMENT FOR NITROGEN COMPOUNDS REMOVAL USING A HORIZONTAL ANOXIC-AEROBIC REACTOR FEEDING WITH BIOGAS AND AIR
Grantee:Renata de Bello Solcia Guerrero
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery
Grantee:Marcelo Zaiat
Support Opportunities: Research Projects - Thematic Grants