Introduction to the principle of IC anaerobic reactors

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It is a new type of anaerobic reactor that follows the UASB format; its volume load can reach up to 20 kg·m3·d-1. The reactor consists of two reaction chambers, one at the top and one at the bottom, each with different fluid dynamics characteristics and functions. The upper and lower reaction chambers are connected by an internal recirculation device; when organic wastewater enters the reaction chambers, most of the organic substances are degraded in the lower reaction chamber. The biogas generated in the lower reaction chamber is blocked by the gas collector and cannot enter the upper reaction chamber. The biogas collected by the gas collector can only enter the gas-liquid separator through the lift pipe. Once the biogas enters the lift pipe, it mixes with the fermentation liquid inside the pipe, resulting in a decrease in the density of that fermentation liquid. This creates a density difference between it and the fermentation liquid outside the pipe, and it is this density difference that drives the fermentation liquid to be continuously lifted upward to the gas-liquid separator. The fermentation broth from which biogas has been separated in the gas-liquid separator is then returned to the lower reaction chamber through a return pipe, thus enabling continuous circulation of the fermentation broth.