Triple Batch Digesters in Series Method to Analyze Biogas Potential from Bioethanol Vinasse
Authors: Iqbal Syaichurrozi, Budiyono Budiyono, Siswo Sumardiono
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The purpose of this study was to investigate biogas production from bioethanol vinasse
using the simple method which was triple batch digester in series mode. Three
digesters (A, B, C) were used in laboratory scale and carried out in 30 days respectively.
The fresh rumen was added in substrates before that were put into each digester (A, B,
C). Ratio of COD/N in substrat was adjusted in variation of 1436/7, 400/7, 500/7,
600/7, 700/7. The results showed that in digester A, biogas was produced in large
amount a first time of fermentation. In digester B, biogas generated was less than that
in digester A. Meanwhile, in digester C, biogas was not produced again. Ratio of 500/7
and 600/7 generated the most biogas volume which was 9,322 and 9,168 mL.