| Title |
Performance of Anaerobic Co-digestion of Pig Slurry with Pineapple (Ananas comosus) Bio-waste Residues |
| ID_Doc |
27259 |
| Authors |
Azevedo, A; Gominho, J; Duarte, E |
| Title |
Performance of Anaerobic Co-digestion of Pig Slurry with Pineapple (Ananas comosus) Bio-waste Residues |
| Year |
2021 |
| Published |
Waste And Biomass Valorization, 12.0, 1 |
| DOI |
10.1007/s12649-020-00959-w |
| 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 degrees C). Three hydraulic retention time were performed, one for the reference scenario (T-0) and two for AcoD trials (T-1, T-2). Feeding mixtures (20:80; v:v) of pineapple peel liquor and pig slurry, with an OLR of 1.46 +/- 0.04 g TVS L-reactor(-1) day(-1) 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 CH4 g TVSadded-1, in comparison with that obtained with pig slurry substrate (0.31 L CH4 g VSadded-1). The AD performance showed a total volatile solids and chemical oxygen demand removal efficiency of 23% to 47% and 26% to 48%, comparing T-0 with the average of T-1 and T-2, respectively. The digester stability, evaluated by specific energetic loading rate, was below the limit (0.4 day(-1)) throughout the trials. Pig slurry co-digestion with pineapple peel liquor seems to be a promising approach for potential bioenergy recovery. [GRAPHICS] . |
| Author Keywords |
Biogas; Waste management; Pineapple; Pig slurry; Circular economy |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000516961500003 |
| WoS Category |
Environmental Sciences |
| Research Area |
Environmental Sciences & Ecology |
| PDF |
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