Addition of molasses, corn steep liquor, and rice polish as economical sources to enhance the fungal biomass production of wheat straw by Arachniotus sp.

Abstract

This study was planned to see the additive effects of various industrial residues including molasses, rice polish, and corn steepliquor for the bioprocessing of wheat straw (WS) through solid-state fermentation (SSF) usingArachniotussp .as a fermenting agent. The performance of fungal-based WS (seed culture) was evaluated in terms of the favorable changes in crude protein (CP) contents. WS(5 g) was mixed with our selected carbon and nitrogen sources in a basal medium containing optimized salt concentrations to attainthe desired level of water and nutrients. An increased (P < 0.0001) CP value was observed at a 25:1 C:N ratio and maximum fungalprotein contents (13.40%) were found by mixing 0.4 mL of molasses, 0.8 g of rice polish, and 3.0 mL of corn steep liquor in treated WSat a setting time of 48 h in SSF. It was seen that the growth rate ofArachniotussp .was greatly improved by the addition of our selectedamounts of carbohydrate and nitrogen sources. Hence, our current results support the use of these economical byproducts for cheapbiomass production.