Abstract：
:The effect of two additives on anaerobic monodigestion of pig slaughterhouse waste was studied in three laboratory scale continuously stirred tank reactors (CSTRs) operated for 242-284 days at 35°C. A higher organic loading rate (OLR), namely 2.25 kg volatile solids (VS)/m(3)d with a hydraulic retention time (HRT) of 30 d was feasible with an additive containing Fe, HCl and trace elements while an OLR of 1.5 kg VS/m(3)d (HRT 30 d) led to instabilities in CSTR with an additive consisting of Fe and HCl and in CSTR without additives. Methane yields of ca. 700 dm(3) CH(4)/kg VS(fed) were obtained in all reactors under stable conditions. Both additives decreased H(2)S concentration of the biogas below detection limit 0.5 ppm while in a control reactor H(2)S concentration was up to 1900 ppm. In conclusion, the results suggest the possibility that additives may facilitate higher OLRs in monodigestion of pig slaughterhouse waste.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Bayr S,Pakarinen O,Korppoo A,Liuksia S,Väisänen A,Kaparaju P,Rintala Jdoi
10.1016/j.biortech.2012.06.009subject
Has Abstractpub_date
2012-09-01 00:00:00pages
106-13eissn
0960-8524issn
1873-2976pii
S0960-8524(12)00913-3journal_volume
120pub_type
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