| Full text | |
| 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 |