Physical Pretreatment of Water Hyacinth for Biogas Production
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Abstract
The objective of this work was to study the effect of physical pretreatment of water hyacinth by size reductionon biogas production and biogas production was estimated by biochemical methane potential (BMP). The BMP work was performed using 120-ml serum bottles. The ratio of water hyacinth to cow dung was 5:1 (wet weight). The six size ranges of water hyacinth were pretreated as: less than 5, 5-10, 10-15, 15-20, 20-25 and 25-30 mm. respectively, while the cow dung served as control. And compare the six size ranges with the size range of 40-50 mm. (no pretreatment). During 39-day incubation period within a room temperature range of 28.1 to 32.0oC, The steady state, the six size ranges and no pretreatment had methane percentages between 47.05 and 53.48. The average of daily biogas production was 18.52±10.80 ml. The biogas yield of water hyacinth with the size of less than 5 mm. was highest of 0.26 m3/kg VS. Furthermore, the size ranges of 5-10, 10-15, 15-20, 20-25 and 25-30 mm. had biogas yields of 0.25, 0.23, 0.21, 0.21 and 0.20 m3/kg VS, respectively. The overall results showed that pretreating Water Hyacinth by size reduction did statistically affect the volume of cumulative biogas produced (Sig <0.05).
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References
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