The effect of bioleaching on sewage sludge pyrolysis.
The effects of bioleaching on sewage sludge pyrolysis were studied. Sewage sludge was treated by bioleaching with solid concentrations of 6% (w/v), 8% (w/v), 10% (w/v). Results showed that bioleaching treatment could modify the physicochemical properties of sewage sludge and enhance the metals removal. The optimum removal efficiencies of heavy metals were achieved with solid concentration of 6% (w/v) bioleaching treatment: Cu, 73.08%; Zn, 78.67%; Pb, 24.65%; Cd, 79.46%. The characterization results of thermogravimetric analysis (TGA) showed that the bioleached sewage sludge with a 6% (w/v) solid concentration treatment was the easiest to decompose. Pyrolytic experiments of bioleached sewage sludge were performed in a laboratory-scale fixed bed reactor. Results indicated that bioleaching treatment greatly influenced the product yields and gas composition.
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Zhihua
Z
Chen
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; SafeCleen Technologies Co. Ltd, Wuhan 430074, China. Electronic address: mianhu_hust@126.com.
Mian
M
Hu
Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
Baihui
B
Cui
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Shiming
S
Liu
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; SafeCleen Technologies Co. Ltd, Wuhan 430074, China. Electronic address: adren840609@gmail.com.
Dabin
D
Guo
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: xiaobo1958@126.com.
Bo
B
Xiao
D042763:Acidithiobacillus; D019149:Bioreactors; D002104:Cadmium / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry; D008670:Metals / Q000737:chemistry; D019216:Metals, Heavy / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000737:chemistry; D015032:Zinc / Q000737:chemistry
D002104:Cadmium; D003300:Copper; D007854:Lead; D008670:Metals; D019216:Metals, Heavy; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical; D015032:Zinc
Bioleaching; Pyrolysis; Sewage sludge