Muaj ntau txoj hauv kev rho tawm raucog cog,xws li cov kuab tshuaj rho tawm, rho tawm ultrasonic, rho tawm microwave, thiab rho tawm cov enzyme, thiab rho tawm cov kua supercritical, microwave-pab rho tawm, thiab lwm yam.
Ua ntej tshaj plaws, cia saib cov tshuaj hnyav hnyav rho tawm. Lub hauv paus ntsiab lus yog tias peb rho tawm cov khoom xyaw zoo los ntawm cov nroj tsuag ntuj hauv lawv qhov ua tau zoo. Txoj hauv kev rho tawm cov khoom xyaw uas muaj txiaj ntsig zoo los ntawm kev siv qhov sib txawv sib tov ntawm cov khoom xyaw hauv cov nroj tsuag hauv cov kuab tshuaj feem ntau nyob hauv tus txheej txheem. Nws siv cov nroj tsuag ntuj ua raw khoom. Nws yog thawj zaug zom thiab muab tso rau hauv lub thawv, thiab tom qab ntawd peb ntxiv qhov tsim nyog ntawm cov kuab tshuaj kom sib xyaw, thiab tom qab ntawd siv cov txheej txheem ntawm dipping, percolation, decoction, reflux thiab txuas ntxiv mus rho tawm cov khoom xyaw nquag. Nws yog ib qho tseem ceeb kom nco ntsoov tias Peb Yuav tsum xaiv cov kuab tshuaj uas yog miscible nrog kev daws teeb meem.
Hauv txhua qhov txheej txheem ntawm kev rho tawm, muaj ntau yam cuam tshuam rau qhov rho tawm ntawm cov khoom xyaw zoo, xws li cov tshuaj hnyav, qhov sib piv ntawm cov khoom siv rau kua, qhov kub thiab lub sijhawm thaum rho tawm, thiab ntxiv rau.