Abstract
english
Highlights
The internal circulation (IC) anaerobic reactor is a successful development based on the UASB reactor of the third generation of high-rate anaerobic reactor
Filamentous bacteria and Methanobacterium were the main microorganisms of the anaerobic granular sludge
The sizes of the granules at different stages are shown in Fig. 2, which shows that, with changing hydraulic retention time (HRT), the diameter of granular sludge changed greatly
Summary
The internal circulation (IC) anaerobic reactor is a successful development based on the UASB reactor of the third generation of high-rate anaerobic reactor. The UASB reactor is considered desirable in high-strength organic wastewater treatment because of its high biomass concentration and rich microbial diversity. Compared with the UASB reactor, the IC anaerobic reactor, which has a smaller site area, higher-diameter ratio, higher organic load, more stable outlet water quality and stronger capacity of impact-resistance load[4], is suitable for a wide range of organic wastewater treatment[5,6,7]. The IC anaerobic reactor is well capable of removing COD removal and performs excellently at high loading rates at medium-high temperature, but it consumes high amounts of energy at medium-high temperature. The IC anaerobic reactor has lower processing ability when operated at ambient temperature, it can save energy and reduce costs. It is important to research IC anaerobic reactor treatment at ambient temperature
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