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Title: | Biogas optimisation processes and effluent quality: A review |
Authors: | Issah, Abdul-Aziz Kabera, Telesphore Kemausuor, Francis |
Keywords: | Anaerobic digestion Substrates Process factors Co-digestion Trace elements |
Issue Date: | 2019 |
Publisher: | Elsevier |
Abstract: | and also as a Municipal Solid Waste Management technique in the US in 1939, significant advances have been
developed to optimise the process in a sustainable manner. In practice, optimising anaerobic digesters to increase
biogas production dependent on a balanced pH (neutral), tolerable volatile fatty acids and alkalinity levels by
anaerobic bacteria. Others include maintaining suitable temperature regime, providing suitable organic loading
rate to prevent noxious conditions, well-balanced carbon to nitrogen ratio to limit ammonia build-up and
appropriate choice of substrates. In terms of biomass, lignocellulose substrates constitute the most abundant bioresource.
This resource however requires modification of the chemistry of the structure to improve its biodegradation,
biogas production and effluent quality. There have been attempts by most researchers to improve
lignocellulose biomass utilization in anaerobic digesters through delignification to prevent non-productive
binding of bacteria as well as reduce the crystalline in cellulose with the aim of making the holocellulose
fractions bioavailable. However, none of the techniques so far applied for the purpose of optimising biogas
production has attained the maximum theoretical biogas yield of 120,000–650,000 L t􀀀 1. Techniques frequently
applied include among others; pretreatment (chemical, biological, physical or their combinations), co-digestion,
application of inoculum or bio-augmentation, and supplementing anaerobic digesters with micronutrients and
nanoparticles. This review thus highlights research findings from authors in relation to factors influencing
effective degradation of lignin based biomass in other to ascertain the best possible strategies to scale up the
process. |
Description: | This article is published in Elsevier and also available at https://doi.org/10.1016/j.biombioe.2019.105449 |
URI: | 10.1016/j.biombioe.2019.105449 http://hdl.handle.net/123456789/13620 |
Appears in Collections: | College of Science
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