Effects of anaerobic/aerobic incubation and storage temperature on preservation and deodorization of kitchen garbage.
To develop a garbage recycling system for the purpose of the production of lactic acid (LA) to use as raw material for producing biodegradable plastics, the preservation and deodorization of garbage during storage are very important. Anaerobic incubation (i.e., storage) was prove to be more suitable than aerobic incubation during the garbage storage in terms of concentration of LA and soluble sugar, pH value, viable bacteria counts and offensive odour substances. This difference is due to a fact that the growth of putrefactive bacteria such as coliforms and Clostridium spp. appeared to be inhibited by anaerobic fermentation during the storage, because the fermentation caused a drop of garbage pH and generated inhibitory substances, i.e., bacteriocins. Under anaerobic condition, LA concentration in the stored garbage was found to be higher in the order: 37 > 25 > 50 > 5 degrees C, and the concentration of sugar accumulated during the 50 degrees C-storage was the highest. Among the conditions employed, the optimum condition for the storage of kitchen garbage was anaerobic at 5 degrees C.
Wang
Qunhui
Q
Department of Environmental Science and Engineering, Harbin Institute of Technology, Nagang, China.
Narita
Jun-ya
JY
Xie
Weimin
W
Ohsumi
Yukihide
Y
Kusano
Kohji
K
Shirai
Yoshihito
Y
Ogawa
Hiroaki I
HI
D001420:Bacteria, Aerobic / Q000378:metabolism*; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology; D001709:Biotechnology; D002241:Carbohydrates / Q000494:pharmacology; D003013:Clostridium / Q000378:metabolism*; D005735:Garbage; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism*; D012037:Refuse Disposal; D013696:Temperature; D013997:Time Factors
D002241:Carbohydrates; D019344:Lactic Acid; D010100:Oxygen