J. Rodrigueziglesias et al., SOLID-STATE ANAEROBIC-DIGESTION OF UNSORTED MUNICIPAL SOLID-WASTE IN A PILOT-PLANT SCALE DIGESTER, Bioresource technology, 63(1), 1998, pp. 29-35
Citations number
18
Categorie Soggetti
Energy & Fuels","Biothechnology & Applied Migrobiology",Agriculture
An anaerobic digestion of municipal solid waste (MSW) was carried out
in a pilot-scale reactor to study anaerobic fermentation as it happens
in a sanitary landfill. The reactor was not inoculated and the MSW us
ed was taken from the COGERSA landfill site in Asturias, Spain. The ex
periments were performed in an opaque PVC reactor at 36 +/- 1 degrees
C. Water was added in the same proportion as the daily rainfall at the
landfill sire. The pH of the leachates was low (5.5-6.1 approximately
) from days 40 to 170 when it began to increase to neutral. 2.25 litre
s of the leachates produced (previously treated with NaOH and NaHCO3 u
ntil day 300) were recirculated from day 120 to the end of the experim
ent Leachate chemical oxygen demand decreased with time, reaching leve
ls of approx 2000 mg/l by the end of this study. Volatile fatty acids
presented a similar behaviour: The main metals found in the leachates
were Fe, Mn and Zn. The methane percentage reached a maximum value of
66%. (C) 1997 Elsevier Science Ltd. All rights reserved.