Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7080474 | Bioresource Technology | 2013 | 10 Pages |
Abstract
A two-stage submerged anaerobic membrane bioreactor (2-SAnMBR) was designed for the treatment of sugarcane vinasse. For start-up, the flow rate was reduced whenever VFA levels reached critical levels in the methanogenic reactor. After acclimation, the system was operated under a continuous flow. Separation of the stages was observed during the entire period of operation. VFA, COD and DOC levels of raw effluent, acidified effluent and permeate averaged 2141, 3525 and 61 mg VFA Lâ1 (as acetic acid), 15727, 11512 and 488 mg COD Lâ1, and, 3544, 3533 and 178 mg DOC Lâ1, respectively. Overall COD and DOC removal efficiencies of 96.9 ± 0.7% and 95.0 ± 1.1%, respectively, were reached. Methane content of the biogas from the acidogenic and methanogenic reactors ranged 0.1-4.6% and 60.1-70.1%, respectively. Removable fouling strongly affected filtration performance and cake layer formation accounted for most of filtration resistance. Membrane resistance was related to presence of protein-like substances and carbohydrates.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Vera Tainá Mota, Fábio S. Santos, MÃriam C.S. Amaral,