title: Impact of food industrial waste on anaerobic co-digestion of sewage sludge and pig manure.
abstract: The performance of an anaerobic digestion process is much dependent on the type and the composition of the material to be digested. The effects on the degradation process of co-digesting different types of waste were examined in two laboratory-scale studies. In the first investigation, sewage sludge was co-digested with industrial waste from potato processing. The co-digestion resulted in a low buffered system and when the fraction of starch-rich waste was increased, the result was a more sensitive process, with process overload occurring at a lower organic loading rate (OLR). In the second investigation, pig manure, slaughterhouse waste, vegetable waste and various kinds of industrial waste were digested. This resulted in a highly buffered system as the manure contributed to high amounts of ammonia. However, it is important to note that ammonia might be toxic to the micro-organisms. Although the conversion of volatile fatty acids was incomplete the processes worked well with high gas yields, 0.8-1.0 m3 kg(-1) VS.
authors.affiliation: Department of Biotechnology, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden. marika.murto@biotek.lu.se
authors.forename: M
authors.initials: M
authors.lastname: Murto
authors.forename: L
authors.initials: L
authors.lastname: Björnsson
authors.forename: B
authors.initials: B
authors.lastname: Mattiasson
mesh_terms: D000818:Animals; D001421:Bacteria, Anaerobic; D019149:Bioreactors; D019649:Food Industry; D007220:Industrial Waste; D008372:Manure; D012722:Sewage / Q000737:chemistry*; D013552:Swine; D014675:Vegetables; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D007220:Industrial Waste; D008372:Manure; D012722:Sewage