Fig. 1

a Response surface curve showing the effects of pH and peptone on the CMCase activity of B. subtilis IND19 in SSF using cow dung substrate. b Response surface curve showing the effects of pH and NaH2PO4 on the CMCase activity of B. subtilis IND19 in SSF using cow dung substrate. c Response surface curve showing the effects of peptone and NaH2PO4 on the CMCase activity of B. subtilis IND19 in SSF using cow dung substrate