Mahinga matua me nga waahanga hanganga:
I raro i te mahi o te whakamahana hau wera me te whakakorikori i roto i te waahanga oumu, ka whakahekehia e te kiriata whakawehe CH₂Cl₂ i runga i te mata, ko te wahanga o te hau hau ka whakapoipohia ki te wai, ka whakamahia tetahi waahanga o te hau hiku karekau hei whakamaroke hau whakamaroke, me te ko tetahi atu waahanga ka tukuna ki te punaha whakaora hau hiku. Ka whiriwhiria e matou he waro whakakoi te anga kokonati, he pai ake te kaha o te whakaurunga CH₂Cl₂, te pai o te purenga me te pai o te hydrophobicity. I roto i te ahua o te tank adsorption whakapae, he nui te kaha o te utaina waro, he tiketike te mahi ngawari, he iti iho te hau o te hiku o CH₂Cl₂ i te 20mg / m³, a ko te tere whakaora he nui atu i te 99.97%.