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Hermann Yuven Wirngo Adeleke Isaac Bamgboye Ngwa Martin Ngwabie

Abstract

Over the past three decades, growing global interest has been in replacing fossil fuels with clean energy from renewable resources. As a result, biogas generation from biodegradable organic waste has become increasingly popular, and water hyacinth is a menace wherever it exists. This study aimed to assess the effectiveness of water hyacinth (Eichhornia crassipes) from River Wouri as a biogas substrate. Equal volumes (700 mL) of water hyacinth and poultry-based inoculum were prepared, each with a duplicate. The 8 substrates were placed in 1-liter plastic and incubated in a water bath at 37± 2 °C for 106 days. The substrates were subsampled before and after incubation to analyse the dry matter, moisture, volatile solids, ash contents, and pH. The volume of biogas produced from each digester was collected in plastic bags and measured every three days; hence, the methane produced was calculated. Results indicated an increase in the moisture contents of the substrates, while pH levels remained unchanged after incubation. The rate of destruction of volatile solids increased with the level of added inoculum. Biogas production started almost immediately for all the samples and largely followed a dome shape over the incubation period. Cumulative methane produced were 10.23, 11.84, 5.88, and 0.71 LCH4/kgVS, respectively, for 100% water hyacinth, 90% water hyacinth, 80% water hyacinth and 0% water hyacinth. This study demonstrates the effectiveness of the weed in biogas production, which could be an important method to manage River Wouri while generating renewable energy.


 

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Keywords

Anaerobic biodigester, Biogas, Inoculum, Methane, Water hyacinth

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Section
Research Articles

How to Cite

Biogas production from water hyacinth (Eichhornia crassipes) harvested from River Wouri, Douala, Cameroon. (2024). Journal of Applied and Natural Science, 16(2), 883-889. https://doi.org/10.31018/jans.v16i2.5631