Biochar-assisted dark fermentative biohydrogen generation: Statistical approach for integrated optimization of peach pomace hydrolysis and biochar production

ÖZMIHÇI S., Iscan K. B., KARAPINAR İ., EROL M., Mustafov S. D., Kelkitlioglu K., ...Daha Fazla

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.223, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 223
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.ijhydene.2026.154337
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, Chemical Abstracts Core, Chimica, Compendex, Environment Index, INSPEC
  • Anahtar Kelimeler: Peach pomace, Box-Behnken experimental design, Biochar, Acid hydrolysis, Biohydrogen fermentation
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Peach pomace (PP) was valorized into biochar (BC) and employed successfully to enhance biohydrogen production from PP hydrolysate (PPH) via dark fermentation. Box-Behnken Design (BBD) was applied to optimize BC production parameters, including temperature (300-650 degrees C), residence time (60-240 min), and heating rate (1-20 degrees C/min). The optimal BC was obtained at 650 degrees C, 88 min, and 20 degrees C/min, maximizing C--C band transmittance and exhibiting favorable structural and surface properties. PP was hydrolyzed under optimized conditions (pH 5.8, 100 degrees C, 62 min), achieving 86% sugar recovery. Batch experiments were conducted under mesophilic conditions with varying BC and substrate concentrations. The maximum biohydrogen yield of 2.86 mmol H2/mmol total sugar and a production rate of 0.26 mmolH2/h were obtained at 1 g/L BC and 10 g/L total sugar concentration. The addition of BC markedly improved biohydrogen production by 1.65-fold compared to the control, clearly demonstrating that BC plays a crucial role in improving biohydrogen.