Title:
A New Waste Free Technology for Recovery of Ligno-Cellulose as Biogas as Energy Source and as Feedstock for Chemical Products
Author(s):
Beschkov, V., Angelov, I., Kirov, V.
Document(s):
Paper
Abstract:
Biogas production from organic waste is one of the most promising ways to recycle carbon dioxide to produce energy and chemical products. The wasted enormous amounts of ligno-cellulosic waste from agriculture are very attractive as raw materials for biogas production. Biogas can be upgraded and used as fuel or to be converted to syngas by dry reforming to get chemical products. The present paper shows some results from pilot scale study on biogas production from hay. Various methods for pre-treatment of cellulose were tested: sulfuric acid digestion, heat explosion, microwave treatment and simple mechanical grinding. The latter seems very promising for its simplicity and relatively good biogas yields. A consecutively connected set of four bioreactors operating at mesophilic temperature mode was constructed. The substrate was ground hay mixed with cow dung as inoculum. The experimental data showed high biogas yield with methane concentration reaching 80% vol.The cascade of bioreactors can operate autonomously in parallel under different conditions. Optionally the biogas can be upgraded by carbon dioxide absorption to produce carbonate/bicarbonate mixture and almost pure methane. The latter could be used to produce organic chemicals as formic acid or methanol.
Keywords:
biogas, cellulose, syngas, upgrading, digestion
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Anaerobic Digestion for Biogas and Biomethane Production
Event:
29th European Biomass Conference and Exhibition
Session:
2CV.3.8
Pages:
585 - 588
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-2CV.3.8
Price:
FREE
