本研究目的乃在探討以生物淋溶法去除大型污水處理廠三種污泥中重金屬銅、鋅之可能性。結果顯示，經生物淋溶後，硫氧化菌對濃縮池及消化槽污泥之氧化活性較大。濃縮池及消化槽污泥之pH, ORP 及硫酸鹽之變化及銅、鋅之去除率皆顯著比曬乾床污泥大。在經16天淋溶後，銅、鋅在濃縮池及消化槽污泥之主要鍵結態由與有機物鍵結態轉為與碳酸鹽鍵結態。 To investigate the effect of bioleaching on the removal of Cu and Zn from varying kinds of sludge from large wastewater treatment plant for evaluate the possibility of treatment, three kinds of sludge (thickener, digester and drying-bed) were tested. Results indicate that oxidizing activity of sulfur-oxidizing bacteria to the sludge was greatest in the sludge of both thickener and digester. The changes of pH, ORP and sulfates in the sludge of both thickener and digester were faster than that in drying-bed sludge whereas the removal efficiencies of the total extractable Cu and Zn in the sludge of both thickener and digester were also significantly higher than that in drying-bed sludge. The mainly partitioning pool of Cu and Zn in both thickener and digester sludge after 16 days of bioleaching were switched to carbonates fraction.
