The variations of pH, VFA, TP, biogas production, COD, TS, VS during the process of thermophilic anaerobic digestion for food waste were studied at the temperature of 55 ℃. The results showed that, during the process of the digestion, pH raised and then went down. The concentration of TVFA went up while that of DVFA went first up then down. The biogas production of this process was 43 211 mL and the average biogas production rate of consumed TS was 158.98 mL/g TS. After the digestion, the removal rate of COD in the digestion fluid was 38.76% , while that of TP, TS and VS was 98.87% , 31.71% and 50.24% respectively. Salmonella, Dysentery bacillus, Escherichia coil and Fecal coliform couldn＇ t be found in the digestion residues after the thermophilic anaerobic digestion, which contained abundant organic matters, nitrogen, phosphor, kalium and Bacillus ,Actinomycetes.
Techniques and Equipment for Environmental Pollution Control