Domestication of inoculums in treating food waste by thermophilic anaerobic digestion

The effects of different adding quomodos of food waste during domestication on the aerogenical activities of inoculum were studied. The best domesticating means was investigated. The sludge was domesticated by different means at themophilic temperature(55℃) to be the inoculums of thermophilic anaerobic digestion for food waste. The microorganism forms of sludge were observed. The variation of pH value and VFA concentration during domestication were considered. The aerogenical activities of sludge domesticated by different means were compared. The results showed that the microorganism form of sludge treated by adding food waste was changed from sphericity to bacillus and distributed dispersedly. Moreover, the aerogenical activity was enhanced. There into, the aerogenical activity of sludge domesticated with the food waste addition of 2.5 g (0.5percent of sludge's mass)per day and the duration of 20 d was the largest. It was 135.65 mL/(g·d) and significantly larger than any other adding quomodos of food waste during domestication. The microorganism community of sludge was improved by domesticated. The largest aerogenical activities of sludge can be obtained by using the best domesticating means and the gas production can also be enhanced.