Title:
Anaerobic Codigestion of Tomato Pomace (Peels Plus Seeds) with Buffalo Sludge Improves Methane Production
Author(s):
Chiariotti, A., Rossi, E., Scalella, R., La Mantia, M.C., Monti, F., Santangelo, E.
Document(s):
Paper
Poster
Abstract:
The buffalo farming and the cultivation of tomatoes for processing are largely spread in southern Italy. Both produce consistent quantities of residues (sludge and peels plus seeds) raising disposal issues. The work intended to identify the optimal inoculum/substrate ratios (ISR) of buffalo sludge (BS) and tomato pomace (TP) for the anaerobic digestion. TP extracted from a commercial variety of tomatoes were used in a batch experiment in an Automatic Methane Potential Test System (AMPTS). The glass reactors were fed with BSand TPin four different Inoculum/Substrate (BS/TP) ratios (ISR)(3.6, 2, 1, 0.5), based on volatile solid (VS) contents. The cumulated methane production increased with the reduction of ISR passing from 7.3 (ISR 3.6) to 10.9 (ISR 1) NL CH4 L-1. The lowest amount was showed by ISR 0.5 (0.6 NL CH4 L-1). ISR 0.5 excluded, the percentage of methane present in the biogas was relatively high, from 76.4% (ISR 2) to 69.1% (BS). The results highlighted the potential of the BS/TP codigestion and the synergy that can be obtained with an optimal substrate inoculum ratio (ISR). The pH level and the VS concentration of TP appears the key factors.
Keywords:
biogas, residues, circular economy
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Anaerobic Digestion for Biogas and Biomethane Production
Event:
29th European Biomass Conference and Exhibition
Session:
2CV.3.4
Pages:
581 - 584
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-2CV.3.4
Price:
FREE
