SYNERGISTIC EFFECT OF CO-DIGESTING DIFFERENT MIX RATIOS OF WATER HYACINTH AND COW-DUNG FOR BIOGAS PRODUCTION.

• Ochuko Mary Ojo

  1Department of Civil and Environmental Engineering, the Federal University of Technology, Akure, PMB 704, Ondo State, Nigeria

• J O Babatola

  ATODATECH LLC, 742 Locust St, #301, Pasadena, CA, USA 91101.

• A A Adesina

  3Department of Mechanical Engineering, the Federal University of Technology, Akure, PMB 704, Ondo State, Nigeria

• A O Akinola

  1. Department of Mechanical Engineering, The Federal University of Technology Akure, Ondo State. Nigeria.

• Olurinde Lafe

  Centre for Renewable Energy, the Federal University of Technology, Akure, PMB 704, Ondo State, Nigeria

The synergistic effect of co-digesting water hyacinth (WH) with cow-dung (CD) for optimum biogas production was evaluated. Different mix ratios of WH to CD were digested in a laboratory scale anaerobic digester over a retention time of 40 days. The volume of biogas produced was determined using water displacement method. The ultimate biogas yield and synergy factors for all the mixes were calculated. The third order polynomial curve for the different mixes had a R² value of 0.9834 which is quite significant. The curve also showed that the highest ultimate biogas yield of 141.72 L was produced by 2 WH: 8 CD and impressively makes it the best CD-aided WH digestion mix. The highest synergy factor of 1.31 was observed for 2 WH: 8 CD which collaborates the fact that the best mix of CD-aided WH digestion in terms of biogas yield is 2 WH: 8 CD.

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