城市垃圾生物干化最佳工艺参数的优化研究

对董村综合垃圾处理厂的有机垃圾进行生物干化,以正交试验确定其最佳工艺运行参数。利用生活垃圾生物干化反应仓开展垃圾生物干化中试试验,以新鲜餐厨垃圾为试验材料,通过正交试验来探讨工艺参数(堆高、初始含水率、通风方式、翻堆方式)对干化效果的影响变化,从而确定生物干化的最佳工艺参数。试验结果表明:垃圾生物干化工艺中各因素影响水分去除率的大小顺序为:翻堆方式>通风方式>初始含水率>堆高。垃圾生物干化的最佳工艺条件如下:堆高1.5 m,初始含水率60%,通风方式(通风10 min,静止30 min),翻堆方式为2天1翻。

OPTIMIZATION OF PROCESSING PARAMETERS OF ORGANIC MSW BIO-DRYING BY ORTHOGONAL TESTS

In order to explore the optimum technological parameters for biological drying of MSW，fresh household garbage was used as materials of biological drying in Dongcun village waste disposal field for biological drying pilot test． The optimum parameters were determined by measuring effects of the orthogonal tests on piled height，initial moisture content，aeration mode，and turning method． The result shows that the influencing factors sequence by their effect on biological drying for MSW is as follows: turning method ＞ aeration mode ＞ initial moisture content ＞ piled height． The optimum technological parameters group for biological drying is as follows: a piled height of 1. 5 m，initial moisture content of 60%，aeration time of 10 min ( ON) /30 min( OFF) ，and pile turning frequency of 1 time for 2 days．