Abstract
The technical feasibility of adopting the fixed-film reactor concept for biogas production from screened dairy manure was investigated. The methane production capability of laboratory-scale 4L anaerobic reactors (conventional and fixed-film) receiving screened dairy manure and operated at 35° was compared. Dairy manure filtrate with 4.4% TS and 3.4% VS (average value) was prepared from 1:1 manure/water slurry. The feed material was added itermittently at loading rates ranging from 2.34 to 25 and 2.25 to 778 g VS/L.d respectively for the conventional and fixed-film reactors. Maximum methane production rate (L.CH4/L.digester/day) for the conventional reactor was 0.63 L.CH4/L.d achieved at a 6 day hydraulic retention time (HRT). For the fixed-film reactor, the maximum production rate was 6.20 L.CH4/L.d when operated at a loading rate of 259 g.VS/L.d (3 hrs HRT). The fixed-film reactor was capable of sustaining a loading of 778 g.VS/L.d (1 hr. HRT). The fixed-film reactor performed much better than the conventional reactors. The average biogas methane content from the fixed-film reactor (65.8%) was always higher than from the conventional reactors (61.6%). These results indicate that a large reduction of required reactor volume is possible through application of a fixed-film concept.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
