Biogas Production Enhancement through Chicken Manure Co-Digestion with Pig Fat

Abstract

Chicken manure and pig fat are found abundantly around the globe, and there is a challenge to get rid of them. This waste has considerable energy potential to be recovered into fuel, but extracting this energy from some by-products, especially fat, isn’t an easy task. When anaerobic digestion technology stepped to the level of anaerobic co-digestion, the utilisation of hardly degradable waste became feasible. Our research was conducted on anaerobic co-digestion of chicken manure as the primary substrate with pig fat as a fat reach supplement in a semi-continuous mode at different organic load rates. The influence of fat waste on the process of biogas production from chicken manure and the composition of the obtained products was determined using an organic load rate of 3.0–4.5 kg VS·(m3·day)−1. A sturdy and continuously growing biogas production was observed at all organic load rates, implying the synergetic effect on chicken manure and pig fat co-digestion. The highest specific methane yield, 441.3 ± 7.6 L·kg VS−1, was observed at an organic load rate of 4.5 kg VS·(m3·day)−1. The research results showed that co-digestion of chicken manure with pig fat is an appropriate measure for fat utilisation and contributes to the increase in biogas yield, methane concentration, and overall methane yield at investigated organic load rates.

The feasibility of using biogas generated from livestock manure as an alternative energy source: A South African perspective

“…According to Buivydas et al (2022), co-digestion of pig fat and chicken manure was a feasible and justifiable utilisation of waste for biogas production. The authors conducted their experiments in a semicontinuous mode where they evaluated the influence of fat waste using different organic loading rates (OLR) from 3.0 to 4.5 kgVS/m 3 .day.…”

Microbial Growth Rate Kinetics in Biogas Production by Anaerobic Digestion of Chicken Manure

“…The biodigester was then kept at the surrounding temperature. This digester technology is simple and peculiar to other technologies listed by Buivydas et al (2022), for constructing anaerobic digesters for either CM or majority of other feedstock. A new technology coupling leach bed reactors and continuous stirred tank reactor (LBR-CSTR) is economically feasible for the digestion of CM coming with several important benefits (Kalogiannis et al, 2022).…”

“…Because in some occasions, codigestion is carried out to improve digestate quality for agricultural application (Johari et al, 2023). For instance, anaerobic co-digestion of pig fat/piggery waste and CM contributed to obtainable energy rise and enhanced biogas production with increasing organic loading rate (Buivydas et al, 2022;Olukanni & Ojukwu, 2021). Previous findings shows that additives such as magnetide, granular activated carbon and biochar had also proven to be an effective enhancers that are suitable for maintaining a desired environment for CM undergoing decay, even though co-feedstock of a primary substrate selected for digestion is often seen as an additive too (Alskory et al, 2021;Cahyono et al, 2023;Ziganshina & Ziganshin, 2022).…”

Two-Phase Anaerobic Digestion of Corn Steep Liquor in Pilot Scale Biogas Plant with Automatic Control System with Simultaneous Hydrogen and Methane Production

“…Anaerobic digestion (AD) of organic waste is an attractive biotechnology, in which the microorganisms degrade the complex organic matter to simpler components under anaerobic conditions to produce biogas and fertilizer [1,2]. After AD processes, the biogas can be upgraded to biomethane, which is considered an attractive renewable energy alternative to natural gas.…”