Recent advancements in strategies to improve anaerobic digestion of perennial energy grasses for enhanced methane production

Recent Advances in Miscanthus Macromolecule Conversion: A Brief Overview

“…Earlier studies described the methane production from miscanthus in the following yields (mL CH 4 /g volatile solids): from 229.5 (no pretreatment) to 327.4 (H 2 O 2 pretreatment) [90] for M. floridulus without and with five pretreatment methods (NaOH pretreatment, H 2 O 2 pretreatment, hot water pretreatment, microaerobic pretreatment, HCl pretreatment); 198.6 for M. × giganteus [91,92]; from 247.1 to 266.5 for M. sinensis, M. floridulus, M. × giganteus and M. lutarioriparius [92]; 190 for M. sacchariflorus and 100 for M. × giganteus [93]. These results are also outlined in the review paper by Song et al [94] who highlighted the research into anaerobic fermentation of perennial energy grasses (pennisetum showed the best result and gave the methane concentration of up to 311 mL CH 4 /g volatile solids). As for lignocellulosic substrates from plant-based residues, their conversion into biogas is most widely studied because this process contributes to an efficient waste management and is the main source for bioenergy.…”

Valorization of crop residues and animal wastes: Anaerobic co-digestion technology

“…Continuous digesters include plug-flow systems, expanded granular sludge blankets, continuous stirred tank reactors, up-flow anaerobic sludge blanket reactors, internal circulation reactors, while batch AcoD processes employ hybrid and sequential batch reactors [ 134 ]. The application of a continuous-feed digester is often preferred over a batch digester for several reasons [ 132 , 135 ]. It requires a smaller reactor space.…”

Co-digestion approach for enhancement of biogas production by mixture of untreated napier grass and industrial hydrolyzed food waste

“…The profile of Napier grass holds significant potential to be studied for biogas generation. Most reported studies have focused on using treated Napier grass to produce biogas, including chemical pretreatment with sodium hydroxide or deep eutectic solvents ( Pinpatthanapong et al, 2022 ; Gundupalli et al, 2023 ), biological pretreatment with mixed cultures enzyme ( Rangseesuriyachai et al, 2023 ), and physical pretreatment with sonication ( Song et al, 2023 ). However, there are limited studies on the use of untreated Napier grass.…”