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

doi:10.1016/j.envres.2023.116691

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

Environ Res. 2023 Nov 15;237(Pt 1):116691. doi: 10.1016/j.envres.2023.116691. Epub 2023 Aug 11.

Authors

Affiliations

¹ Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Punjab, 61100, Pakistan.
² Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China.
³ Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Punjab, 61100, Pakistan. Electronic address: iftikharahmad@cuivehari.edu.pk.
⁴ Department of Architectural Engineering, College of Engineering, UAE University, United Arab Emirates.
⁵ Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
⁶ Faculty of Engineering and Technology, Future University in Egypt, New Cairo, 11835, Egypt.
⁷ Department of Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, India.
⁸ School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk, 38541, South Korea. Electronic address: msunithachem@gmail.com.
⁹ Department of Organic Chemistry, University of Cordoba, Spain.

PMID: 37574097
DOI: 10.1016/j.envres.2023.116691

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.

Keywords: Anaerobic-co-digestion; Bioeconomy; Biogas yield; Nutrient recovery; Organic waste; Sugar cane bagasse ash.