关键词: 厌氧内循环反应器, 结构原理, 水力特性, 工程应用, 优化

Abstract: As one of the third-generation of anaerobic bioreactors，anaerobic internal circulation （IC） bioreactor has as advantages in high volume efficiency，energy saving，small floor area and high height/diameter ratio. It has become an important technology in high concentration organic wastewater treatment in recent years. This paper introduced the configuration principle and hydraulic characteristics of IC reactor. The configuration of IC reactor is equivalent to two of up flow anaerobic sludge blanket（UASB） series，with internal circulation. The hydraulic characteristics include two important parameters as up-flow velocity and system pressure drop. The start-up，substrates inhibition characteristic，and applications of IC reactor was overviewed. The prospect of IC reactor to treat livestock wastewater with high ammonia nitrogen was analyzed. The optimization orientation of IC reactor’s configuration and process was also discussed.

Key words: anaerobic internal circulation reactor, configuration principle, hydraulic characteristics, engineering applications, optimization