污泥热水解产物中重金属对油麦菜生长的影响

Effect of Heavy Metals in Sludge Thermal Hydrolysate on the Germination Growth of Lactuca Sativa L

研究了污泥热水解产物中四种重金属的形态分布,以及污泥热水解产物对植物生长的影响。结果表明,热水解过程中,Zn、Cu、Cd和Pb有84%～98%转移到固相中,并且在固相中主要以残渣态存在。污泥水解液促进了油麦菜生长,污泥水解泥饼则对油麦菜生长表现出抑制效果。

Studies are carried out on the form distribution of four heavy metals in the sludge thermal hydrolysate and its effect on plant growth. Results show that in the process of thermal hydrolysis, 84% to 98% of Zn, Cu, Cd, and Pb is transmitted into solid phase and exists there mostly in the form of residual. Sludge hydrolyte will promote the growth of Lactuca sativa L while the hydrolyzed sludge cake will restrain its growth.