Year: 2025
Type: article
Abstract: Municipalities are entrusted with solid waste management to avoid rapid fill-up of landfills, provide apt sustainable solid waste management solutions, and mitigate greenhouse gas emissions. Slaughterhouses are major contributors to environmental degradation, water pollution and global warming. In the current study, the waste generated from animal slaughter houses in Limuru was calculated, the potential of Limuru municipality slaughterhouse waste to generate biogas and bio-electricity and organic bio-fertilizer investigated and the waste greenhouse gases emission potential was also computed. Inadequate information on abattoir resource recovery and utilization formed the need for this cross-sectional study conducted from January to March 2024. Four selected slaughter houses in Limuru municipality, Kenya, were selected; namely Limuru, Bahati, Makutano and Ngecha. Aniebo mathematical computation models were used to determine the amount of slaughterhouse from the number of animals processed. The results exhibited that 1739.479 tonnes of abattoir waste is generated annually. Anaerobic digestion produced 92.1924 m3 of biogas annually as per the Rao model. This translated to electricity production potential of 49.3229 kWh p.a and heat production potential of 71.4484 kWh p.a as a form of resource recovery. There was 549.0512 m3 reduction of greenhouse gases using biogas technology which translated to positive impact on environmental safety, public health and GHG emission reduction.
Authors: Mbugua J. K, Waswa A. G, Mbui D. N
Institutions: South Eastern Kenya University, University of Nairobi
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4410264692