ABSTRACT
Sewage sludge is generated in the treatment process of sewage (waste) water, which has great resource recovery potential, but at the same time, it also contains a certain amount of pollution components. Thus, the research, development, and practice of efficient and safe utilization technology of sewage sludge have always been the focus of attention. In recent years, the feasibility of the pyrolysis process for sewage sludge treatment has been widely studied. This chapter firstly introduces the pyrolysis mechanism of sewage sludge; secondly, the key influencing factors of the sewage sludge pyrolysis process are described; then, the co-treatment of sewage sludge with other biomass/waste by pyrolysis is discussed; next, the control effects of pyrolysis process on the heavy metal pollution in sewage sludge are introduced; finally, the formation and transformation of polycyclic aromatic hydrocarbons (PAHs) during the disposal of sewage sludge through pyrolysis are discussed. This chapter can provide a basic understanding for people to understand and carry out sewage sludge pyrolysis.
