Currently, the livestock sectors of Bangladesh are blooming at an incredible rate. In addition to the higher economic gain from this sector, the burden of managing a vast amount of waste has attracted the attention of environmentalists. Producing biogas and resource recovery can be a valuable solution to manage these wastes and produce clean energy. The present analysis aims to determine the bioresource potential of livestock waste in all divisions of Bangladesh. Total biogas, bioelectricity, biofertilizer, methane, and heat energy generation potential are estimated for 2020-21. Prospective manure production from livestock waste was highest in Dhaka (50.53 Mtyr À1 ) and lowest in Sylhet (14.51 Mtyr À1 ). It is estimated that 17652.2 million m 3 of biogas could have been produced from only livestock manure. The total biogas potential from livestock waste was 25520.9 million m 3 in 2020-21. Prospective annual methane production was 15277.3 million m 3 , while 467.4 petajoules of heat energy could have been produced from this sector. The estimated bioelectricity potential was 45.4 terawatts. hours (TWh), while annual biofertilizer production could be 29.81 million tons. Using biomethane in place of diesel could avoid yearly greenhouse gas (GHG) emissions of 42,500 kilotons of CO 2 equivalent and reduce 28,800 kilotons of CO 2 in Bangladesh. The outcome of this study can serve as a benchmark guideline for potential investors and policymakers to ensure optimal investment to produce bioenergy from livestock waste in different regions of Bangladesh.

Increasing prices of conventional energy sources and ongoing environmental pollution have encouraged policymakers to search for sustainable energy resources. In developing countries, livestock waste is often mismanaged and negatively impacts the environment. Bioenergy production from agricultural and animal wastes can be a viable solution. This study conducted a month‐wise survey on a multipurpose farm and a dairy farm in Chattogram, Bangladesh, to estimate the bioenergy potential from farm livestock waste. Based on the survey, mathematical modeling was applied to estimate the selected farm's theoretical bioelectricity, biogas and biofertilizer production potential. The analysis shows that the multipurpose and dairy farm have an annual biogas production potential of 209,660.2 and 1,205,035.5 m3, generating 3.77E+05 and 2.17E+06 kWhyr−1 of bioelectricity, respectively. The multipurpose farm and the dairy farm could generate 982.03 and 16092.49 tons of bio manure yearly and had an annual biofertilizer potential of 64.36 and 2090.91 tons. Both environmental and economic analyses show that both farms have good greenhouse gas mitigation potential and can earn significant revenue by selling electricity and biofertilizer in the market. The outcome can provide valuable guidelines for policymakers to invest in bioenergy production from farm animal waste.