Reuse of Enzymatic Hydrolyzed Residues from Sugarcane Bagasse to Cultivate Lentinula edodes

In the conversion process of lignocellulose into fuel ethanol, the enzymatic hydrolyzed or fermented lignocellulosic residues are produced as byproducts. In order to further recycle these byproducts, this study used the enzymatic hydrolyzed residues of sugarcane bagasse (EHRSCB) as the media for culturing Lentinula edodes. The sugarcane bagasse (SCB), pretreated by liquid hot water (LHW), was hydrolyzed for 120 h with cellulase to obtain the EHR-SCB. The EHR-SCB was mixed with wheat bran and gypsum powder in a certain proportion to make six kinds of media. The media containing 50% and 60% EHR-SCB could cultivate Lentinula edodes, due to their rational ratio of carbon to nitrogen and mineral contents. Compared with Lentinula edodes sold in the market, the one cultured in the medium containing 50% EHR-SCB had a little higher content of amino acids except cysteine and proline, and mineral elements except zinc, while that cultured in the medium containing 60% EHR-SCB had a lower content of amino acids except serine, glutamic acid, glycine, methionine, tyrosine, and arginine, and mineral elements except selenium, copper, chromium, and manganese. After harvesting Lentinula edodes, the mushroom residues might be further used as media for obtaining value-added products or composting for manure.