Some strains having decoloration and degradation effects on reactive red PBLwere isolated
from sludge from bioreactors of a dye factory. Through re-screening, one strain, named asTS4, was
found to have a better decoloration performance and identified preliminarily asBacillus Sp.
Experimental results show that the effect of decoloration is influenced by temperature, pH value and
oxygen supply conditions. The optimum growth condition for the strain is 37℃, pH=7. 8 and sealed
culture. In addition, this strain can endure the reactive red PBL to a concentration of200 mg/L, and
the decoloration performance of a single strain isweaker thanmixed strains.