7Pereboom J H F, et al. Methanogenic granule development in full scale internal circulation reactors[J]. Wat Sci Tech, 1994, 30 (8): 9-12.
8Ayazi Shamlou P, Rajarajan J, Ison A P. Gas holdup liquid circulation velocity and shear rate in an external loop airlift containing non-Newtonian polymer solutions[J]. Bioprocess Engineering, 1998, 19: 399-402.
