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- Title
Biomethane Production in an AnSBBR Treating Wastewater from Biohydrogen Process.
- Authors
Lullio, T.; Souza, L.; Ratusznei, S.; Rodrigues, J.; Zaiat, M.
- Abstract
An anaerobic sequencing batch reactor containing immobilized biomass (AnSBBR) was used to produce biomethane by treating the effluent from another AnSBBR used to produce biohydrogen from glucose- (AR-EPHG) and sucrose-based (AR-EPHS) wastewater. In addition, biomethane was also produced from sucrose-based synthetic wastewater (AR-S) in a single AnSBBR to compare the performance of biomethane production in two steps (acidogenic and methanogenic) in relation to a one-step operation. The system was operated at 30 °C and at a fixed stirring rate of 300 rpm. For AR-EPHS treatment, concentrations were 1,000, 2,000, 3,000, and 4,000 mg chemical oxygen demand (COD) L and cycle lengths were 6 and 8 h. The applied volumetric organic loads were 2.15, 4.74, 5.44, and 8.22 g COD L day. For AR-EPHG treatment, concentration of 4,000 mg COD L and 4-h cycle length (7.21 g COD L day) were used. For AR-S treatment, concentration was 4,000 mg COD L day and cycle lengths were 8 (7.04 g COD L day) and 12 h (4.76 g COD L day). The condition of 8.22 g COD L day (AR-EPHS) showed the best performance with respect to the following parameters: applied volumetric organic load of 7.56 g COD L day, yield between produced methane and removed organic material of 0.016 mol CH g COD, CH content in the produced biogas of 85 %, and molar methane productivity of 127.9 mol CH m day. In addition, a kinetic study of the process confirmed the trend that, depending on the biodegradability characteristics of the wastewaters used, the two-step treatment (acidogenic for biohydrogen production and methanogenic for biomethane production) has potential advantages over the single-step process.
- Subjects
BIOGAS production; WASTEWATER treatment; CHEMICAL oxygen demand; BATCH reactors; METHANE industry; RENEWABLE natural gas
- Publication
Applied Biochemistry & Biotechnology, 2014, Vol 174, Issue 5, p1873
- ISSN
0273-2289
- Publication type
Article
- DOI
10.1007/s12010-014-1170-1