3 research outputs found
Performance of Anaerobic Co‑digestion of Pig Slurry with Pineapple (Ananas comosus) Bio‑waste Residues
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 (
T0) and two for AcoD trials (
T1, T2).
Feeding mixtures
(20:80; v:v) of pineapple peel liquor and pig slurry, with an OLR of 1.46 ± 0.04 g TVS L−
1
reactor 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 T0
with the average of T1
and T2,
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.info:eu-repo/semantics/publishedVersio