Pre-treatment of banana leaves with alkaline banana winery bottle-washing wastewater to improve the anaerobic digestion process

Richard, Edwin N.

doi:10.1007/s13399-022-02727-3

Cited by 2 publications

(1 citation statement)

References 36 publications

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“…For example, Gunaseelan [22] found that banana peel produced a methane yield of 243-322 mL/g VS during LS-AD. Previous studies showed that LS-AD of banana leaf and stem achieved methane yields of 46-56 mL/g VS [41,42] and 146 to 347 mL/g VS [2,43], respectively. Jokhio, et al [44] found that batch LS-AD of mixed banana waste (stem and leaf) achieved a methane yield of 48 mL/g VS. Zhang, et al [45] reported that the methane yield of HS-AD of banana stem was 232 mL/g VS.…”

Section: Methane Production With Varying Biochar Dosagesmentioning

confidence: 99%

Enhancement of System and Environmental Performance of High Solids Anaerobic Digestion of Lignocellulosic Banana Waste by Biochar Addition

2023

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Banana waste, a lignocellulosic waste material, is generated in large quantities around the world. High Solids Anaerobic Digestion (HS-AD) of lignocellulosic waste can recover energy and reduce its environmental impacts. However, high carbon/nitrogen ratios and low water content in HS-AD can potentially cause system acidification and/or failure. This study investigated the addition of biochar to enhance the performance of HS-AD of mixed banana waste (peel, stem, and leaf). Biochemical methane potential assays with varying biochar dosages (2.5–30%) showed that 10% biochar addition increased methane yields by 7% compared with unamended controls. Semi-continuous HS-AD studies, without and with 10% biochar addition, were conducted at varying solids retention times (42, 35, and 28 days) for long-term performance evaluation. Biochar addition reduced volatile fatty acid accumulation, improved system stability, and increased methane production by 20–47%. The nutrient content of digestate from HS-AD of banana waste indicated its potential use as a bio-fertilizer. Life cycle assessment results showed that biochar addition to HS-AD resulted in greater environmental benefits in most categories compared with the unamended control, including eutrophication, ecotoxicity, and fossil fuel depletion when biochar was available within a radius of 8830 km.

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