"Steam distillation of essential oil crops produces residual distillation wastewater that is released into the environment. This study evaluated the effects of three plant hormones [methyl jasmonate (MJ); gibberellic acid (GA3); and salicylic acid (SA)] at three concentrations and the residual distillation water from 15 plant species applied as foliar spray on biomass yields, essential oil content, and essential oil yield of Mentha ×piperita 'Black Mitcham' and Mentha spicata 'Native'. Overall, the application of SA at 1000 mg·L−1 increased biomass yields of both species.
It was shown that the distillation wastewater of sage, thyme, and rosemary contained antioxidants and could be used as an ingredient in marinades for turkey meat to inhibit lipid oxidation and the development of rancid off-flavors.
This study demonstrated that the residual distillation water of some aromatic plant species may be used as a tool for increasing essential oil content or essential oil yields of peppermint and spearmint crops.
The essential oil analyses indicated that peppermint oil contained α-pinene, β-pinene, sabinene, myrcene, l-limonene, 1.8 cineole, paracimene, transsabinenehydrate, l-menthone, menthofuran, d-isomenthone, b-bourbonene, menthyl acetate, neo-menthol, b-cariophyllene, l-menthol, pulegone, germacrene-d, and piperitone.
The spearmint essential oil contained α-pinene, β-pinene, sabinene, myrcene, l-limonene, 1.8 cineole, cis-ocimene, y-terpinene, 3-octyl acetate, 3-octanol, transsabinenehydrate, b-bourbonene, terpinene-4-ol, b-cariophyllene, dihydrocarvone, transdihydrocarvyl acetate, transb-farnesene, α-terpineol, geracrene-d, l-carvone, cis-carvyl acetate, transcarveol, cis-carveol, cis-jasmone, and viridiflorol.
This study demonstrated that the residual distillation water of some aromatic plant species, a waste product from distillation that is currently released into rivers and streams, may have an effect on crop species and may be used as a tool for increasing essential oil content or essential oil yields of peppermint and spearmint crops."
Source -
Effect of Plant Hormones and Distillation Water on Mints