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BioTechnologia
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3/2017
vol. 98
 
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abstract:
RESEARCH PAPERS

Optimizing biomethanation of a lignocellulosic biomass using indigenous microbial-cellulases systems

Chima Ngumah
1
,
Jude Ogbuli
1
,
Justina Orji
1
,
Ekperechi Amadi
1
,
Chris Nweke
1
,
Jude Allino
2

  1. Department of Microbiology, Federal University of Technology, Owerri, Nigeria
  2. Department of Chemistry, Federal University of Technology, Owerri, Nigeria
BioTechnologia vol. 98(3) C pp. 245-255 C 2017
DOI: https://doi.org/10.5114/bta.2017.70802
Online publish date: 2018/01/02
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Studies on enhancing biomethanation were performed to ascertain whether amending lignocellulosic biomass waste with indigenous microbial-cellulases systems will improve biomethane output. To evaluate this, gastrointestinal contents of slaughtered beef cattle were treated with inocula derived from the guts of giant African land snail (Archachatina marginata ) and worker termites (Coptotermes formosanus ), individually as well as combined. The fed-batch method operating at prevailing ambient room temperatures (30 ± 2EC) for a hydraulic retention time (HRT) of 60 days was adopted. Feedstock slurry without amendment, amended with Archachatina marginata -derived inoculum, amended with Coptotermes formosanus -derived inoculum, and amended with Archachatina marginata: Coptotermes formosanus (50 : 50%) mixed inocula yielded cumulative biomethane of 65.26 ml/g VS, 63.21 ml/g VS, 125.99 ml/g VS, and 97.16 ml/g VS, respectively. Physicochemical analysis of feedstock and digestates revealed increased reductions in lignin, hemicelluloses, and celluloses (lignocelluloses) in trials amended with microbial-cellulases systems. This study revealed that among the experiments assayed, the trial amended with the cellulases system from Coptotermes formosanus yielded the highest cumulative biomethane.
keywords:

anaerobic digestion, biogas, bio-augmentation, recalcitrant biowaste


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