Bed energy dissipation rate of super-high-rate anaerobic bioreactor

In order to guide po-wer matching and operation optimization of super-high-rate anaerobic bioreactor (SAB), and accelerate the engineering application of SAB, this work mainly concentrated on energy dissipation characteristics of SAB under the states of nonfludized bed, fluidizaed bed and transportation bed, respectively, which were investigated by using anaerobic granular sludge, simulation influent and gas production. The SAB was filled with 1.5 L, 2.5 L and 3.5 L anaerobic granular sludge, respectively, and was fed with sulfuric acid solution (0.5%, w/w). Gas was produced by chemical reaction between sulfuric acid and saturated sodium bicarbonate. Bed energy dissipation rate (φ) models were established under the states of nonfludized bed and fluidized bed, respectively. The predictions from these models agree well with the experimental data and, therefore, they can be used to estimate φ of SAB. The maximum φ under the states of nonfludized bed, granular sludge agglomeration, liquid-solid two-phase fluidizaed bed and gas-liquid-solid tree-phase fluidized bed are 0.143 W/m3, 4.449 W/m3, 2.173 W/m3 and 11.132 W/m3, respectively. Thereinto, the maximum φ value of 11.132 W/m3 is one of the basic parameters for power matching.