| Title | A Novel Adsorption/Co-Digestion/Pyrolysis Scheme for Potato Peel Waste Management to Fulfill the Sustainable Development Goals (SDGs) |
|---|---|
| ID_Doc | 12368 |
| Authors | Augustine, D; Abdelhaleem, A; Ookawara, S; Nasr, M |
| Title | A Novel Adsorption/Co-Digestion/Pyrolysis Scheme for Potato Peel Waste Management to Fulfill the Sustainable Development Goals (SDGs) |
| Year | 2024 |
| Published | |
| Abstract | While several studies have utilized potato peel to prepare biochar involved in dye adsorption from wastewater, there is still a research gap in managing the spent feedstock to minimize secondary pollution formation. Hence, this study focuses on recycling the exhausted potato peel-based biochar after methylene blue (MB) adsorption for dual biogas and char production. Biochar was synthesized from potato peel pyrolysis (at 600 degrees C for 2 h) and employed for MB removal according to Box-Behnken statistical design. The optimized time and adsorbent dosage were 55.2 min and 2.6 g/L, giving 81.76 +/- 4.34% removal at initial MB = 50 mg/L and pH = 9. The exhausted biochar was regenerated and supplemented to an anaerobic digester using a biochar: chicken droppings (CD) ratio of 1:4 (w/w) at 37 degrees C for 25 days. The biochar/CD synergy exhibited a bio-CH4 yield of 159.6 +/- 10.5 mL/g CODinitial greater than the sole CD digester by 32.4%. Another experiment was introduced to maintain a sustainable circular economy by thermally treating the anaerobic digestate at 500 degrees C for 60 min. The generated biochar acquired a yield of 0.62 g/g sludge-cake, exhibiting heterogenic surface and 52% carbon content. This novel adsorption/digestion/pyrolysis strategy enjoyed carbon credit and biogas/biochar selling, getting a 5.62-year payback period.Graphical AbstractCreated with BioRender.com (Agreement numberPE26SMHU1Y). |
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