摘要：The characteristics and role of solar energy as heat source for enhancing excess sludge reduction were investigated. TS and TVS removal were 36.9% and 44% (summer), 29.3% and 27.5% (autumn), and 18.5% and 24.8% (winter), respectively.The average temperatures inside and outside the reactor in summer, autumn, and winter on sunny day were 46.3 °C and 28.3 °C, 43.5 °C and 26.1 °C, and 25 °C and 15.3 °C, respectively; On rainy day, the average temperatures inside and outside the reactor were 38.9 °C and 26.4 °C, 28.5 °C and 22.4 °C, and 16.8 °C and 12.8 °C, respectively. The average temperatures inside the reactor in summer, autumn, and winter on sunny day were higher than those outside, and the relationship between the temperatures was 18.3 °C, 17.4 °C, and 9.7 °C, respectively; On rainy day, the relationship was 12.1 °C, 6.1 °C, and 4.1 °C, respectively.
