污泥处置方法的研究

主要讨论了经粉煤灰与石灰稳定后的污泥与天然土壤组成的改良土壤的性质及种植可能性。研究表明,只要控制稳定化污泥在改良土壤中所占百分比,所选植株的发芽及产量都不受影响,并且植株组织中未发现Cu、Mn等重金属累积。因此,将污泥采用粉煤灰和石灰稳定后用于改良土壤不失为一种污泥处置方法。

STUDY OF SUSTAINABLE DEVELOPMENTAL METHOD OF SLUDGE DISPOSAL

In this paper,the feasibility of planting on a mixture of soil and the stabilized sludge (dewatered sludge was stabilized by pulverized fuel ash(PFA)and lime according to the ratio of sludge:PFA:lime equaled to 60∶35∶5)was studied.Two kinds of plants, Agropyron Elongatum and Cynodon Dactyulon, were used in this study.Natural soil obtained locally was amended by addition of the lime/PFA stabilized sludge at the rates of 0,2 5,5,10,15 and 25%(w/w).This study indicated that Agropyron Elongatum was more suitable than Cynodon Dactyulon to plant on the amended soil.The germination and yields of Agropyron Elongatum were not affected so long as the ratio of stabilized sludge to amended soil was controlled not higher than 10%. And,there was no Cu and Mn accumulation in the shoot tissues upon stabilized sludge addition. So that it might be a sustainable developmental method of sludge disposal by using stabilized sludge to amended soil.