Lavandula dentata Solid Residue from Essential Oil Industry

Abstract

Essential oil industry produces a considerable amount of solid residues during the distillation process. These wastes are very rich in high added-value compounds like polyphenols. In this work, we have tentatively identified the polyphenols present in solid residues from the steam distillation and non-distilled extract of Lavandula dentata, and assessed for it total phenols and total flavonoid content. The antioxidant activity was estimated using tree different methods. The antimicrobial activity has been evaluated against sex bacterial strains. Both remarkably high phenolic content and radical scavenging activities were found in the metanolic and ethanolic extracts. In general, the residue material was found to exhibit higher phenolic content as well as antioxidant and radical scavenging activities than the non-distilled material. Finally, We concluded that the methanolic and ethanol residue extracts were a promising source of antioxidant and antimicrobial agents that can be exploited as health-promoting compounds in food or in cosmetic products.