Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4997056 | Bioresource Technology | 2017 | 35 Pages |
Abstract
A newly developed fixed bed disc reactor (FBDR) which combines biofilm formation on biofilm carriers and reactor agitation in one single system was assessed for its applicability to demand-driven biogas production by variable feeding of sugar beet silage. Five different feeding patterns were studied at an organic loading of 4Â gVSÂ Lâ1Â dâ1 under mesophilic and thermophilic conditions. High methane yields of 449-462Â LNÂ kgVS were reached. Feeding variable punctual loadings caused immediate response with 1.2- to 3.5-fold increase in biogas production rates within 15Â min. Although variable feeding did not induce process instability, a temporary decrease in pH-value and methane concentration below 40% occurred. Thermophilic temperature was advantageous as it resulted in a more rapid, higher methane production and less pronounced decrease in methane content after feeding. The FBDR was demonstrated to be well-suited for flexible biogas production, but further research and comparison with traditional reactor systems are required.
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Authors
Christiane Terboven, Patrice Ramm, Christiane Herrmann,