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

• Published in: International journal of hydrogen energy 2023-07, Vol.48 (56), p.21360-21371
• Main Authors: Jokhio, Ikirsha, Qureshi, Sundus Saeed, Sahito, Abdul Razzaq, Qureshi, Mehr-un-Nisa, Lashari, Imtiaz Ahmed, Mubarak, N.M., Tripathi, Manoj, Al-Mohaimeed, Amal M., elshikh, Mohamed S.
• Format: Article
• Language: English
• Subjects: Anaerobic Co-Digestion; Banana plant waste; Bio-methane; Biogas; Sewage sludge
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2022.04.238

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 best-achieved 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. •Banana plant wastes (BPW) with sewage sludge (SS) improved anaerobic co-digestion.•Co-digestion 60:40 wt% of BPW to SS produced 732.15 NmL/gVS.•Alkalinity treatment with 0.75 gm NaOH/gVS improved bio-methane production.•The kinetics of bio-methane production follows Gompertz model.