Comparison of glucose yield from rubberwood sawdust (RSD), growth medium (GM), and mushroom spent medium (MSM) under different sodium hydroxide pretreatment techniques

Abstract

Large quantities of oyster mushroom (Pleurotus sajor caju. )spent medium (MSM) were disposed of as agricultural waste to the environment and thereby constituting environmental pollution. Therefore the study was conducted to examine the feasibility of using MSM as glucose source in comparison to RSD and GM under different NaOH pretreatment techniques and at the same enzymatic saccharification condition. The composition analysis proved that decreases in lignocellulosic contents occurred after cultivation of The amount of lignin, hemicelluloses, and cellulose in MSM showed lower values than those in RSD and GM which were 22.40, 27.93, and 27.97% respectively. The surface morphology of MSM appeared to be rough and broken and traces of hyphen on the fibre surface were observed as a result from the mushroom cultivation process. RSD and FM had an even and smooth flat surface, indicating a rigid and highly ordered surface structure. The highest glucose yield were obtained from MSM under all three NaOH pretreatment techniques (autoclaving at 121°C, heating in water bath, soaking at room temperature), that were 31.07, 30.13, and 21.97, g/ dry substrate respectively. The amount of glucose obtained from RSD and GM under the same treatments were comparable.

Mechanical, Physical, and Chemical Properties of Mycelium-Based Composites Produced from Various Lignocellulosic Residues and Fungal Species

“…Therefore, the differences in the water absorption abilities of various MBCs were found to be related to differences in the chemical components of the composites. Accordingly, the water absorption ability of MBCs in this study was influenced by the cellulose content in the substrate, of which rice straw was found to contain higher cellulose content (39-43% dry mass basis) than corn husk (30-35% dry mass basis) and sawdust (33-38% dry mass basis) [98][99][100][101]. In addition, Robertson et al [102] found that the absorption ability of MBCs was reduced when smaller particle-sized substrates were used.…”

“…This outcome was in accordance with the findings reported by Appels et al [26] and could be explained by the fact that fungal colonization can change the composition of lignocellulosic residues that are susceptible to thermal degradation. This study found that the thermal degradation values of corn husk (containing 30-35% cellulose, 31-37% hemicellulose, and 8-14% lignin of dry mass basis) and sawdust (containing 33-38% cellulose, 29-31% hemicellulose, and 28-29% lignin of dry mass basis and 33-38% dry mass basis) were similar [98][99][100][101], but they differed from rice straw (containing 39-43% cellulose, 23-25% hemicellulose, and 12-20% lignin of dry mass basis). These results are supported by the findings of other previous studies, which reported that the type of lignocellulosic residues had no influence on thermal degradation due to the similar cellulose content [97,[109][110][111].…”

Renewable Carbohydrates: Advancements in Sustainable Glucose Production and Optimization

“…On the other hand, there is limited utilization of sawdust to produce glucose. One among previous studies (within [2018][2019][2020][2021][2022][2023] discovered is a study by Hassan et al (2018).…”