Zdu mndandanda mosalekeza lamba vacuum fyuluta ndi chipangizo olimba-zamadzimadzi kulekana motsogozedwa ndi vacuum negative.Mwadongosolo, gawo la fyuluta limakonzedwa motsatira njira yopingasa kutalika, yomwe imatha kumaliza kusefera, kutsuka, kuumitsa ndi kusinthika kwa nsalu zosefera.Chipangizocho chili ndi kusefera kwakukulu, mphamvu yayikulu yopanga, kuchapa bwino, kutsika kwa chinyezi cha keke ya fyuluta ndi ntchito yosinthika, mtengo wotsika wokonza.Itha kugwiritsidwa ntchito polekanitsa olimba-zamadzimadzi muzitsulo, migodi, makampani opanga mankhwala, kupanga mapepala, chakudya, mankhwala, kuteteza zachilengedwe ndi zina, makamaka mu gypsum dehydration mu flue gas desulfurization (FGD).