印染污泥固化及稳定化处理研究

Study on solidification/stabilization treatment of textile dyeing sludge

采用水泥、粉煤灰和煤渣作为固化剂对印染污泥进行固化/稳定化处理,并探讨了固化/稳定化的最佳工艺条件。当水泥、粉煤灰和煤渣的掺量分别为0.15、0.02和0.08 kg/kg,养护天数为6 d时,印染污泥固化块抗压强度达到330kPa,含水率为44.6%,符合填埋场的进场标准。固化块浸出液中Cr、Cu、Ni、Pb、Zn和COD浓度同固化前相比,分别降低了88.9%、83.3%、88.9%、47.4%和69.3%,Cd则均未检出。固化剂对印染污泥中重金属及COD等污染物具有较好的固定作用。

Sludge from textile dyeing was solidified and stabilized by using cement,PFA and cinder as the solidifying agents,and the optimum conditions of sludge solidification/stabilization were analyzed.Under the dosage of cement,PFA and cinder of 0.15,0.02 and 0.08 kg/kg,respectively,and curing time of 6 days,the compressive strength of the solidified sludge block reached 330 kPa while the moisture content of the solidification block reached 44.6%,which met with the standards of landfill.Compared with the untreated textile dyeing sludge,the concentration of Cr、Cu、Ni、Pb、Zn and COD of the leaching from the sludge solidification block was reduced by 88.9%、83.3%、88.9%、47.4% and 69.3%,respectively,the Cd was undetectable.Solidifying agents have good effects on the solidification and stabilization of organic and heavy metal in textile dyeing sludge.