Th. Chen et Ag. Hashimoto, EFFECTS OF PH AND SUBSTRATE - INOCULUM RATIO ON BATCH METHANE FERMENTATION, Bioresource technology, 56(2-3), 1996, pp. 179-186
Citations number
25
Categorie Soggetti
Energy & Fuels","Biothechnology & Applied Migrobiology",Agriculture
Batch digestion experiments were conducted to determine the effects of
inoculum:substrate ratio and initial medium pH on methane production
from glucose. A ratio between the chemical oxygen demands (GOD) of the
substrate and inoculum solids (SISR) was used to quantify the food to
microorganisms (FIM) ratio. Two periods of active methane production,
separated by a period of inactivity, characterized the fermentation.
The duration of inactivity was affected by both SISR and the initial m
edium pH. It decreased as SISR was decreased or when a higher initial
pH was used. With a SISR of 4.8 and a pH of 7.2 or 7.0, the inactive p
eriod was eliminated, indicating satisfactory coupling of the acid- an
d methane-forming phases. Ultimate methane yield at a SISR of 4.8 was
higher than at a SISR of 38.5. Copyright (C) 1996 Elsevier Science Ltd
.