Sugarcane-bagasse-ash in enhanced mesophilic Co-digestion for biogas and nutrient recovery: A concept of developing rural circular bioeconomy

Shahid Mumtaz, Yasir Abbas, Iftikhar Ahmad, Ahmed Hassan, Muhammad Farhan Saeed, Sining Yun, Zainab M. Almarhoon, Mohamed Shelkh, Ahmed M. Hassan, P. Rosaiah, Maduru Suneetha, Awais Ahmad

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Conductive agro-industrial wastes as accelerants in the anaerobic digestion (AD) of organic waste is a good technique for developing a rural circular economy, such as producing bioenergy and biofertilizer. This study disclosed the a role of sugar cane bagasse ash (SCBA) in enhancing the bioenergy (biogas) yield and digestate fertility via anaerobic co-digestion (AcoD) of buffalo dung (BD) and vegetable residue (VR) under mesophilic conditions (37 ᴼC). Firstly, an optimal BD/VR ratio (1:3) was determined based on biogas yield by introducing five different BD/VR ratios (1:0, 3:1, 1:1, 1:3, and 0:1) into AcoD systems. Secondly, the biogas yield was increased further by adding SCBA at five different concentrations (0, 0.5, 1, 1.5, and 2 wt%). Experimental results disclosed that the 1.5 wt% of SCBA gave the highest cumulative biogas yield (153.67 mL/g VS), COD removal rate (31.18%), and fertility (5.08%). Moreover, a framework is suggested to understand the role of SCBA in the enhanced DIET mechanism. This work documents an environmentally friendly and economical technique for developing a rural circular bioeconomy via the AD of organic agro-waste.

Original languageEnglish
Article number116691
JournalEnvironmental Research
Volume237
DOIs
Publication statusPublished - Nov 15 2023

Keywords

  • Anaerobic-co-digestion
  • Bioeconomy
  • Biogas yield
  • Nutrient recovery
  • Organic waste
  • Sugar cane bagasse ash

ASJC Scopus subject areas

  • Biochemistry
  • General Environmental Science

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