Abstract:

Due to the slow natural anaerobic fermentation characteristics of tomato stems and leaves, waste activated sludge was closed to be added into the digestor of tomato stems and leaves ( VS ratio of waste activated sludge and tomato stems and leaves of 1∶2) to improve substrate nutrient composition. Anaerobic granular sludge of 0. 1 g/ mL was inoculated to compenstaes the deficiency of methanogenesis microbes. Under such regulation, the removal rate of tomato stems and leaves was increased to more than 95 %, and the corresponding biogas yield of organie fermentation was improved to 263 mL/ g ( 7. 5 times improvement) . Meanwhile, methane volume fraction in biogas was also increased by 64.5%. This method achieves not only the goal of waste control by waste, but also that of the maximization of resource utilization

Key words: tomato stems and leaves')">tomato stems and leaves, anaerobic fermentation, anaerobic granular sludge, waste activated sludge