Zhang Dongqing, He Pinjing, Shao Liming, Jin Taifeng, Han Jingyao
State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tong]i University, Shanghai 200092, China.
J Environ Sci (China). 2008;20(12):1534-40. doi: 10.1016/s1001-0742(08)62562-0.
The high water content of municipal solid waste (MSW) will reduce the efficiency of mechanical sorting, consequently unfavorable for beneficial utilization. In this study, a combined hydrolytic-aerobic biodrying technology was introduced to remove water from MSW. The total water removals were proved to depend on the ventilation frequency and the temporal span in the hydrolytic stage. The ventilation frequency of 6 times/d was preferable in the hydrolytic stage. The hydrolytic span should not be prolonged more than 4 d. At this optimal scenario, the final water content was 50.5% reduced from the initial water content of 72.0%, presenting a high water removal efficiency up to 78.5%. A positive correlation was observed between the organics losses and the water losses in both hydrolytic and aerobic stages (R = 0.944, p < 0.01). The evolutions of extracellular enzyme activities were shown to be consistent with the organics losses.
城市固体废弃物（MSW）的高含水量会降低机械分选效率，因此不利于其资源化利用。本研究引入了水解-好氧生物干燥技术来去除城市固体废弃物中的水分。结果表明，总水分去除量取决于水解阶段的通风频率和时间跨度。水解阶段的通风频率为每天6次较为适宜。水解时间跨度不应延长超过4天。在这种最佳情况下，最终含水量从初始的72.0%降低了50.5%，水分去除效率高达78.5%。在水解阶段和好氧阶段，有机物损失与水分损失之间均呈现正相关（R = 0.944，p < 0.01）。细胞外酶活性的变化与有机物损失一致。
