Title:
Use of Roadside-green-cuttings for Anaerobic Digestion as a Potential Phytoremediator to Hinder Biogas Production Inhibition Through High Lead (Pb) Concentrations
Author(s):
López-Velarde, S.M., Rieker, C., Becerra-Jiménez, J., Bursche, J., Gaese, D.
Document(s):
Paper
Abstract:
The utilization of roadside-green-cuttings (grass) for anaerobic digestion increases the possibilities of using organic wastes as a renewable energy source. Grass can be used as a substrate to increase biogas yield. Nevertheless, the anaerobic digestion of this kind of wastes can be limited due to the fact that they could be contaminated with heavy metals, caused especially from traffic emissions and industrial activity. For this reason the biogas production of grass from a busy road were assessed. Samples of roadside-grass were washed with an organosulphid, which is used for the removal of heavy metals from wastewater. Anaerobic digestion of the washed and unwashed roadside-grass was compared. Results from the anaerobic digestion of the unwashed grass were much more effective, than the one of the washed grass. A second experiment was carried out and co-fermentation of manure and farm-grass was prepared for anaerobic digestion. Lead was added in the concentrations 500, 1000 and 2000 mg Pb2+/kg. The results showed that the higher the lead concentration, the lower the inhibition of the biogas yield. The grass could be acting as phytoremediator for high lead concentrations. The grass could contain organic compounds, which can assimilate heavy metals.
Keywords:
anaerobic digestion, heavy metals, inhibitors, grass
Topic:
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Anaerobic digestion for biogas production
Event:
20th European Biomass Conference and Exhibition
Session:
2DV.3.29
Pages:
1465 - 1467
ISBN:
978-88-89407-54-7
Paper DOI:
10.5071/20thEUBCE2012-2DV.3.29
Price:
FREE
