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Performance of Anaerobic Co-digestion of Pig Slurry with Pineapple (Ananas comosus) Bio-waste Residues.
- Source :
- Waste & Biomass Valorization; 2021, Vol. 12 Issue 1, p303-311, 9p
- Publication Year :
- 2021
-
Abstract
- Agro-food industries produce large amounts of bio-waste, challenging innovative valorisation strategies in the framework of circular economy principles. Anaerobic digestion technology is an interesting route to stabilise organic matter and produce biogas as a renewable energy source. This paper aimed to study the optimal performance conditions for anaerobic co-digestion (AcoD) of pig slurry with pineapple (Ananas comosus) peel bio-waste. The anaerobic digestion (AD) trials were performed at lab scale, in a continuous stirred reactor, for 16 days' hydraulic retention time in mesophilic conditions (37 ± 1 °C). Three hydraulic retention time were performed, one for the reference scenario (T<subscript>0</subscript>) and two for AcoD trials (T<subscript>1</subscript>, T<subscript>2</subscript>). Feeding mixtures (20:80; v:v) of pineapple peel liquor and pig slurry, with an OLR of 1.46 ± 0.04 g TVS L<superscript>−1</superscript><subscript>reactor</subscript> day<superscript>−1</superscript> were used during AD/AcoD trials, presenting high values for soluble chemical oxygen demand and C/N ratio. This operational conditions highlight bioenergy recovery up to 0.58 L CH<subscript>4</subscript> g TVS<subscript>added</subscript><superscript>−1</superscript>, in comparison with that obtained with pig slurry substrate (0.31 L CH<subscript>4</subscript> g VS<subscript>added</subscript><superscript>−1</superscript>). The AD performance showed a total volatile solids and chemical oxygen demand removal efficiency of 23% to 47% and 26% to 48%, comparing T<subscript>0</subscript> with the average of T<subscript>1</subscript> and T<subscript>2</subscript>, respectively. The digester stability, evaluated by specific energetic loading rate, was below the limit (0.4 day<superscript>−1</superscript>) throughout the trials. Pig slurry co-digestion with pineapple peel liquor seems to be a promising approach for potential bioenergy recovery. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18772641
- Volume :
- 12
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Waste & Biomass Valorization
- Publication Type :
- Academic Journal
- Accession number :
- 148189399
- Full Text :
- https://doi.org/10.1007/s12649-020-00959-w