Study on the co-pyrolysis behavior of sewage sludge and water hyacinth

Abstract

The purpose of this study is to investigate the thermal behavior and their interaction patterns of SS and WH co-pyrolysis. The mixture was non-isothermally heated at different heating rates (20,30,40°C/min) using a thermogravimetric analyzer under N2 atmosphere and reaction temperature range of 20 – 800°C . The study found that both SS and WH pyrolysis can be divided into three parts, in order of water release zone, major volatile fraction release zone, and slow carbonization zone. The individual pyrolysis performance of WH(CPI=26.17) was significantly better than that of SS (CPI=6.22), and the co-pyrolysis of samples with different mixing ratios showed inhibition or promotion, with W7S3 showing the strongest promotion  interaction. From the viewpoint of thermal behavior and kinetics, co-pyrolysis of SS and WH is highly feasible, and the proportion of WH should be appropriately increased in practical engineering applications to achieve more effective utilization of waste.