A protease-producing Stenotrophomonas rhizophila MT1 isolated from sludge samples of shrimp ponds was selected to evaluate extracellular proteases. Enzyme activity reached the highest value of 139.02 U/mL after 60 h of culture. The isolate produced the highest protease activity in the culture medium containing 1% casein (w/v) with an inoculum size of 10% (v/v) and an agitation speed of 180…