Two-stage banana leaves wastes utilization towards mushroom growth and biogas production

Abstract

Banana leaves wastes (BL) were subjected to fungal treatment using Pleurotus ostreatus to produce edible mushrooms and biogas in the anaerobic digestion process. Effects of fungal treatment on mushrooms production, lignin degradation, trace elements compositions and biogas yield during the anaerobic digestion process were evaluated. Treatment with P.ostreatus for 36 d resulted in the production of 181 ± 19 g of edible mushrooms per 2 kg of BL with biological efficiency of 37 ± 4%. Lignin concentration in fungal treated BL decreased by 10% indicating an improvement on its digestibility. Important trace elements (Fe, Mn, Mo, Co and Ni) necessary for the improvement of the anaerobic digestion process were also significantly reduced (P < 0.05) during the fungal treatment process. The biogas yield for the fungal treated BL was 282 mL g −1 VS −1 of which this study suggests that could be improved through trace element supplementation during the anaerobic digestion process.

Stimulating Biogas Production from Steam-Exploded Birch Wood Using Fenton Reaction and Fungal Pre-Treatment

“…Then the water content of the samples was removed (using a centrifuge, 15,000 rpm, 10 min) and stored (at − 20 • C) to maintain a suitable humidity level for fungi cultivation. During the cultivation, the humidity level of the samples with PO and LE was adjusted at 88-95 % and 62-80 %, respectively (Richard et al, 2020;Schimpf et al, 2019). Upon finishing the pretreatment, the samples were sterilized at 120 • C for 15 min and cooled down at room temperature to prepare them for fungal pretreatment.…”