Zhang Dong-Qing, He Pin-Jing, Shao Li-Ming
State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
Waste Manag. 2009 Nov;29(11):2816-23. doi: 10.1016/j.wasman.2009.06.024. Epub 2009 Jul 15.
One aerobic and two combined bio-drying processes were set up to investigate the quantitative relationships of sorting efficiency and combustion properties with organics degradation and water removal during bio-drying. Results showed that the bio-drying could enhance the sorting efficiency of municipal solid waste (MSW) up to 71% from the initial of 34%. The sorting efficiency was correlated with water content negatively (correlation coefficient, r=-0.89) and organics degradation rate positively (r=0.92). The higher heating values (HHVs) were correlated with organics degradation negatively for FP (i.e. the sum of only food and paper) (r=-0.93) but positively for the mixing waste (MW) (r=0.90), whereas the lower heating values (LHVs) were negatively correlated with water content for both FP (r=-0.71) and MW (r=-0.96). Other combustion properties depended on organics degradation performance, except for ignition performance and combustion rate. The LHVs could be greatly enhanced by the combined process with insufficient aeration during the hydrolytic stage. Compared with FP, MW had higher LHVs and ratios of volatile matter to fixed carbon. Nevertheless, FP had higher final burnout values than MW.
设置了一个好氧生物干燥过程和两个组合生物干燥过程，以研究生物干燥过程中分类效率和燃烧特性与有机物降解及水分去除之间的定量关系。结果表明，生物干燥可将城市固体废物（MSW）的分类效率从初始的34%提高到71%。分类效率与含水量呈负相关（相关系数r = -0.89），与有机物降解率呈正相关（r = 0.92）。对于食品和纸张之和（FP），高热值（HHV）与有机物降解呈负相关（r = -0.93），而对于混合废物（MW）则呈正相关（r = 0.90），而对于FP（r = -0.71）和MW（r = -0.96），低热值（LHV）均与含水量呈负相关。除着火性能和燃烧速率外，其他燃烧特性取决于有机物降解性能。在水解阶段通气不足的组合过程可大大提高低热值。与FP相比，MW具有更高的低热值和挥发物与固定碳的比率。然而，FP的最终 burnout 值高于MW。
