Title:
Characterizing the Energy Performance of Hemp Straw Anaerobic Digestion at Pilot Scale
Author(s):
Asquer, C., Canu, M., Carboni, G.
Document(s):
Paper
Slide presentation
Abstract:
Under the framework of an experimental project about industrial hemp cultivation, the production of biogas from the straw obtained after the seed harvest was investigated. In the present paper, hemp straw was treated in an anaerobic digestion pilot plant at unusually high total solids (TS) content and organic loading rate (OLR). The TS in the feeding mixture varied from 4 to 14 %wt and the OLR in the range of 2÷4.5 kgVS·d-1, while the TS in the sludge increased up to 12 %wt. To improve the efficiency of the anaerobic digestion process multiple management strategy were adopted changing the feedstock composition, adding hydrolytic enzymatic compound, and applying continuous digestate recirculation. The different TS and OLR levels identified two treatments applied. The evolution of the energy performance achieved was analyzed: significant increase in the gas production rate of biogas and methane with increments of TS and OLR were obtained. No difference was observed in the specific biogas and methane production yields. The latter might represent characteristic values of the selected substrate at the pre-treating and operating conditions adopted. This approach was effective in providing the authors with information on the biogas generation reliable for industrial applications.
Keywords:
anaerobic digestion, biogas, hemp, yield
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Anaerobic digestion for biogas and biomethane production
Event:
30th European Biomass Conference and Exhibition
Session:
4DO.7.2
Pages:
641 - 647
ISBN:
978-88-89407-22-6
Paper DOI:
10.5071/30thEUBCE2022-4DO.7.2
Price:
FREE
