Environmental Investigation on Co-Combustion of Sewage Sludge and Coal Gangue:SO_2,NO_x and Trace Elements Emissions

To relieve the environmental issues of massive waste material,the integrated method of co-combustion of sewage sludge(SS) and coal gangue(CG) were proposed and systematically investigated,with emphasis on environmental influences.The SO_2 and NO_x,as well as the trace elements release behavior during mono-combustion and co-combustion of SS and CG were studied with regard to the effects of their chemistries and structures.Results show that co-combustion is beneficial for lowering SO_2 emission while partly increases NO emission.However,a synergic effect on both desulfurization and denitrification can be expected at ca.800 ℃.With respect of trace elements,SS revealed high heavy metal concentration,especially for Zn and Cu,while the concentrations in CG were generally within the Clarke value range.An enhanced retention of trace elements during co-combustion was observed.On the basis of the results,it can be expected that with proper operation,co-combustion of SS and CG can be a promising method for the disposal ...To relieve the environmental issues of massive waste material,the integrated method of co-combustion of sewage sludge(SS) and coal gangue(CG) were proposed and systematically investigated,with emphasis on environmental influences.The SO_2 and NO_x,as well as the trace elements release behavior during mono-combustion and co-combustion of SS and CG were studied with regard to the effects of their chemistries and structures.Results show that co-combustion is beneficial for lowering SO_2 emission while partly中华人民共和国商务部、中华人民共和国文化部、中华人民共和国环保部、中华人民共和国海关总署、国务院发展研究中心、国家旅游局、国家能源局、国家外国专家局、中国国际贸易促进委员会、国家开发银行、中国进出口银行、陕西省人民政府、国际欧亚科学院、上海合作组织秘书处、