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Innovative low-temperature disintegration (process temperature 55 °C and oxygen concentration 0.2 mg/dm3) can be an economically rational technology to intensifying energy production from renewable sources. The proposed process can achieve a degree of disintegration—under optimal conditions—of about 50%, which is excellent when compared with other methods of feed pre-treatment. The low-temperature disintegration of distillation residue and waste-activated sludge before the co-fermentation process increased biogas production by 30% and methane production by 65% (over a 26 d duration). The obtained results confirm that the low-temperature disintegration method can be effectively used to pre-prepare this type of feed. At the same time, it was discovered that the Gompertz model can be used to mathematically describe the biogas accumulation curves in the methane co-fermentation processes of the tested feeds (the correlation coefficients were higher than 0.98).

The growing need for sustainable energy generation has sparked interest in exploring alternative biogas sources. In recent years, insects have emerged as a promising substitute for traditional feedstocks in biogas production due to their high protein and lipid content, rapid growth rate, and low environmental impact. This literature review aims to provide an overview of the advances in insect employment for sustainable energy generation. It presents a comprehensive analysis of the existing literature, highlighting the potential of insects as viable and renewable biogas sources, the challenges associated with insect rearing and processing, and the technological innovations in optimizing their utilization. The review also discusses the economic viability and environmental benefits of employing in-sects in biogas production and future research directions in this emerging field. The nutrient content of fermentable or biodegradable organic materials will serve as an ingredient in the production of biogas/biomethane. Nutrient-rich insect frass will eliminate the need for co-digestion with another feedstock, as previously examined. Currently, insect waste is not a familiar feedstock for biogas production, as its first utilization dates back to 2018, when 177-225 mL/g TS of biomethane was realized.

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