关键词: 污泥, 厌氧消化, 气化, 燃烧, 微生物燃料电池

Abstract: Treatment and disposal of municipal sewage sludge is one of the hot issues in recent years，and the potential utilization of sludge as energy is gradually attracting the attention of researchers. On the basis of introduction of sludge composition and properties，the main technologies and methods of utilization of sludge as energy were summarized，including anaerobic digestion，pyrolysis，gasification，combustion，microbial fuel cells and so on. In this paper each technology or method was discussed in the aspects of its principle，process，products and pollution control. The process of combustion and co-combustion can provide a way to realize energy conversion directly and has been promoted and applied nowadays. But it has the disadvantages of high costs and subsequent problems such as pollution gases and ash disposal during the process. Secondary pollution such as pollution gas emission can be avoided using gasification and pyrolysis，but the process and equipment are relatively complicated，preventing their industrial applications. Anaerobic digestion and microbial fuel cell technologies can achieve not only sludge reduction，but also energy production through the action of microorganisms，and they seem to be the likely direction of utilizing sludge as energy.

Key words: sewage sludge, anaerobic digestion, gasification, combustion, microbial fuel cells