Strategies to reduce short-chain organic acids and synchronously establish high-rate composting in acidic household waste.
The aim of this study was to document whether addition of lime or increased amount of bulking agent would ensure, efficiently, a predictable composting process in acidic SSOW applicable in full scale plants. The results show that both lime addition and increasing the amount of bulking agent relative to waste support the development of high-rate respiration in composting. Both strategies are considered efficient in establishing desired microbial composting processes of acid household waste. Reduction in the content of different organic acids and loss on ignition were higher when more bulking agent was used compared with adding 5% lime to the acidic SSOW. Respiration was completely repressed in samples with 10% lime, where pH remained high. In addition fat and protein seem to degrade faster with increasing amount of bulking agent.
Bergersen
Ove
O
Bioforsk - Soil and Environment Division, Frederik A. Dahls vei 20, N-1432 As, Akershus, Norway. ove.bergersen@bioforsk.no
Bøen
Anne S
AS
Sørheim
Roald
R
D000143:Acids / Q000737:chemistry*; D001105:Archaea / Q000378:metabolism*; D001673:Biodegradation, Environmental; D017610:Calcium Compounds / Q000737:chemistry*; D005191:Family Characteristics; D006863:Hydrogen-Ion Concentration; D009930:Organic Chemicals / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D012988:Soil Microbiology; D018505:Waste Management / Q000379:methods*; D014866:Waste Products
D000143:Acids; D017610:Calcium Compounds; D009930:Organic Chemicals; D010087:Oxides; D014866:Waste Products; C016538:lime