High-solid mesophilic methane fermentation of food waste with an emphasis on Iron, Cobalt, and Nickel requirements.
The effect of trace metals on the mesophilic methane fermentation of high-solid food waste was investigated using both batch and continuous experiments. The continuous experiment was conducted by using a CSTR-type reactor with three run. During the first run, the HRT of the reactor was stepwise decreased from 100 days to 30 days. From operation day 50, the reactor efficiency deteriorated due to the lack of trace metals. The batch experiment showed that iron, cobalt, and nickel combinations had a significant effect on food waste. According to the results of the batch experiment, a combination of iron, cobalt, and nickel was added into the CSTR reactor by two different methods at run II, and III. Based on experimental results and theoretical calculations, the most suitable values of Fe/COD, Co/COD, and Ni/COD in the substrate were identified as 200, 6.0, and 5.7 mg/kg COD, respectively.
College of Resources and Environment, Northwest A&F University, Yangling 712100, China.
Hong
H
Qiang
Dong-Li
DL
Lang
Yu-You
YY
Li
D001419:Bacteria / Q000187:drug effects / Q000378:metabolism; D056804:Biofuels / Q000032:analysis; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D003035:Cobalt / Q000494:pharmacology*; D005232:Fatty Acids, Volatile / Q000032:analysis; D005285:Fermentation / Q000187:drug effects*; D005502:Food; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D007501:Iron / Q000494:pharmacology*; D007700:Kinetics; D008697:Methane / Q000378:metabolism*; D009532:Nickel / Q000494:pharmacology*; D012037:Refuse Disposal / Q000295:instrumentation / Q000379:methods*; D013997:Time Factors; D014866:Waste Products / Q000032:analysis*
D056804:Biofuels; D005232:Fatty Acids, Volatile; D014866:Waste Products; D003035:Cobalt; D009532:Nickel; D007501:Iron; D008697:Methane