Abstract
Effective treatment of livestock feces and urine is necessary to prevent surface and ground water from being polluted. In this study, thermophilic oxic process (TOP) was applied to the treatment of swine waste. The proper environment condition for the thermophilic bacteria was investigated. The results were summarized as follows : It was impossible to treat swine waste by TOP. As for the reason, the calorie of swine waste lacked for the calorie of water evaporation and temperature rising. However, it could be treated by adding food oil as an assistant calorie source. When BOD5 load was 3 kg·m-3·day-1, aeration rate was 100l·m-3·min-1 and 120ml of food oil was added, 86% of carbon was converted to CO2 and 98% of water was evaporated in one cycle. ATP concentration and the number of thermophilic bacteria became the highest values under 55% of average water content in one cycle. And in this experiment 7 hours for the duration time of over 60°C in one cycle was suitable for maintaining 55% of average water content. The temperature condition of over 60°C was also very important to increase microbial activity.
