Removal of monomer delignification products by laccase from Trametes versicolor

► Effect of laccase on lignin derived phenolic monomers in wheat straw hydrolyzates. ► Identification of three reaction groups of phenolic monomers towards laccase (LRG). ► Compounds of LRG-B and -C important in respect to detoxification for fermentation. ► Different results comparing phenolic monomer analytic and total phenol content. ► HS-SPME/GC-MS powerful method analyzing volatile compounds in hydrolyzates.