Ib qho khoom siv roj ntau cov roj tank yog ib qho khoom siv siv hauv cov txheej txheem ntawm kev rho tawm cov roj tseem ceeb los ntawm cov khoom siv cog. Cov kev tso tsheb hlau no feem ntau yog ua los ntawm cov hlau tsis xeb thiab tuaj yeem sib txawv hauv qhov loj nyob ntawm cov ntsuas ntawm kev ua haujlwm.
Extraction tank ua haujlwm los ntawm kev siv cov kuab tshuaj, xws li ethanol lossis hexane, kom yaj cov roj tseem ceeb los ntawm cov khoom ntoo. Cov kuab tshuaj yog tom qab ntawd evaporated tawm, tawm hauv qab cov roj tseem ceeb.
Muaj ib qho tseem ceeb roj rho tawm hauv lub tank yog qhov tseem ceeb rau kev rho tawm cov roj tseem ceeb ntawm cov khoom siv cog. Tus txheej txheem no tso cai rau cov txiaj ntsig tseem ceeb ntawm cov roj tseem ceeb piv rau cov txheej txheem ib txwm muaj, xws li ua kom didillation.
Zuag qhia tag nrho cov roj, tseem ceeb roj rho tawm cov hlau hluav taws xob ua rau cov roj tseem ceeb hauv kev tsim cov roj muaj txiaj ntsig zoo thiab ua tau zoo.
