B. Sarapatka, FACTORS INFLUENCING BIOGAS PRODUCTION DURING FULL-SCALE ANAEROBIC FERMENTATION OF FARMYARD MANURE, Bioresource technology, 49(1), 1994, pp. 17-23
Citations number
14
Categorie Soggetti
Energy & Fuels","Biothechnology & Applied Migrobiology",Agriculture
Farmyard manure was subjected to anaerobic fermentation in airtight di
gesters for approximately 30 days. The annual biogas production was 0.
9 m(3) per large animal unit per clay with three different production
levels evident: a summer period, a transitional period and a winter pe
riod, when biogas production was 1.1, 0.75 and 0.55 m(3) per animal un
it per day, respectively The research focused on the factors influenci
ng equipment operation for farmyard manure anaerobic fermentation and
biogas production. The factors discussed in this paper can be divided
into three different groups: (i) main independent factors (natural con
ditions, transition to summer and/or winter feeding); (ii) main factor
s affected by the operational conditions (composition of feed, aerobic
stage); and (iii) secondary factors that may nor influence fermentati
on under optimum operational conditions (feed quality, quantity and qu
ality of bedding, technology of farmyard manure removal). Once the inf
luence of secondary and partly, main controllable factors had been eli
minated, higher biogas production could be expected mostly in the tran
sitional and winter periods, up to 0.85 and 0.65 m(3) per large animal
unit per day; the annual average biogas production would then reach 0
.95 m(3) per large animal unit.