Pilot-scale anaerobic digestion of screenings from wastewater treatment plants.
The anaerobic digestion of screenings from a municipal wastewater treatment plant was studied in a 90 L pilot-scale digester operated at 35 degrees C under semi-continuous conditions. In the first 4 weeks, a dry solids residence time of 28 days was applied, but the installation of inhibitory conditions was observed. Feeding was therefore suspended for 4 weeks to allow the digester to recover from inhibition, and then progressively increased up to a constant load of 6 kg of raw waste per week, corresponding to an average residence time of about 35 days of dry solids. At this stage, biogas production stabilized between 513 and 618 Nl/kg VS(added) per week, with methane contents around 61% v/v. The results of this work thereby supported the feasibility of (co-)digestion as a potential alternative treatment of screenings from municipal wastewater treatment plants.
Le Hyaric
Ronan
R
University of Lyon, INSA of Lyon, Lab. LGCIE, 20 av. A. Einstein, F-69621 Villeurbanne cedex, France. ronan.le-hyaric@insa-lyon.fr
Canler
Jean-Pierre
JP
Barillon
Bruno
B
Naquin
Pascale
P
Gourdon
Rémy
R
D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D056804:Biofuels / Q000032:analysis; D005232:Fatty Acids, Volatile / Q000032:analysis; D005602:France; D006863:Hydrogen-Ion Concentration; D009930:Organic Chemicals / Q000737:chemistry; D010865:Pilot Projects; D012722:Sewage / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
D056804:Biofuels; D005232:Fatty Acids, Volatile; D009930:Organic Chemicals; D012722:Sewage