Although the phenol compounds consist of various
substances including vanilic acid, syringic
acid, p-coumaric acid, galic acid, ferulic acid,
caffeic acid, and sinapic acid, in this study the
ferulic acid is verified as a core substance in
growing algae. In addition, it is verified that the
concentration of this substance is largely
affected by the amount of barley straw and the
extraction time.