RT Journal Article T1 Effect of char addition on anaerobic digestion of animal by-products: evaluating biogas production and process performance A1 Arenas, Cristian A1 William, Meredith A1 Snape, Collin Edward A1 Gómez, Xiomar A1 González, Juan Francisco A1 Martínez, Elia Judith AB The effect of char addition on the digestion of animal by-products was evaluated as a way for enhancing the performance of the process. Two different types of carbonaceous materials were tested as carbon conductive elements to improve biological treatment. One was derived from a torrefaction process intended for increasing the energy density of lignocellulosic biomass, and the other was obtained from a hydrothermal carbonisation process. In this research, batch digestion systems of animal waste samples were evaluated at a volatile solid (VS) ratio of 1:1 inoculum–substrate (where the content of the substrate in the system was 1.69 ± 0.2 g). The system reported a baseline methane yield of 380 L CH4 kg VS-1 which increased on average to 470 L CH4 kg VS-1 following to the addition of char. The presence of char allowed a faster degradation of the lipid and protein material, reducing inhibitory interactions. The use of Fourier transformed infrared spectroscopy was applied for elucidating the predetermination of the degradation process and bring an insight into the greater degradation potential attained when carbon materials are used for enhancing microbial performance. PB Springer YR 2020 FD 2020-04-07 LK https://hdl.handle.net/20.500.14352/124335 UL https://hdl.handle.net/20.500.14352/124335 LA eng NO Arenas, Cristian Bernabé, et al. «Effect of Char Addition on Anaerobic Digestion of Animal By-Products: Evaluating Biogas Production and Process Performance». Environmental Science and Pollution Research, vol. 27, n.o 19, julio de 2020, pp. 24387-99. DOI.org (Crossref), https://doi.org/10.1007/s11356-020-08828-8. NO Ministerio de Economía y Competitividad DS Docta Complutense RD 26 feb 2026