Enhanced bio-methane and bio-hydrogen production using banana plant waste and sewage sludge through anaerobic co-digestion

The yield of bio-methane and bio-hydrogen was enhanced by co-digesting banana plant waste (BPW) and sewage sludge (SS). In stage 1, acclimatisation of the inoculum SS is performed in a continuous stirred tank reactor (CSTR), and its various parameters are analyzed daily. In stage 2, six different BPW to SS ratios is optimized and incubated in manual methane potential test setup (MMPTS) for 40 days. The highest bio-methane and bio-hydrogen yields were observed from R4 (60% BPW and 40% SS). In stage 3, the bestachieved ratio of BPW and SS are then treated with different doses of NaOH as an alkaline pre-treatment. The highest bio-methane was achieved from dose 2 (0.75 mol NaOH) as 620.8 NmL/day. The study shows that the co-digestion of the BWP with SS has promising potential for enhanced bio-methane and bio-hydrogen production.& COPY; 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

The yield of bio-methane and bio-hydrogen was enhanced by co-digesting banana plant waste (BPW) and sewage sludge (SS). Acclimatisation of the inoculum SS was performed in a continuous stirred tank reactor (CSTR), and its various parameters were analyzed daily. Six different BPW to SS ratios were optimized and incubated in a manual methane potential test setup (MMPTS) for 40 days, with R4 (60% BPW and 40% SS) showing the highest yields. Furthermore, the best achieved ratio of BPW and SS was treated with different doses of NaOH as an alkaline pre-treatment, and the highest bio-methane yield was observed with dose 2 (0.75 mol NaOH) at 620.8 NmL/day. The study demonstrates the promising potential of co-digestion of BPW and SS for enhanced bio-methane and bio-hydrogen production.