Cibiyar juyawa scraper ne yadu ake amfani da ruwa aiki a sedimentation tafkin dumping, dukan injin kaya ne aiki a kan aiki gada cibiyar. Ruwan datti yana gudana zuwa kewaye da tank ta hanyar tsakiyar daidaitaccen ruwan ruwa. Tare da rage gudun gudun, an raba abubuwan da aka dakatar a cikin ruwan datti kuma an sanya su a ƙarƙashin tafkin, ta hanyar scraper don tattara ƙasa zuwa tsakiyar tank, ta hanyar matsin lamba na ruwa don cire su daga bututun ƙasa.
Girman ƙirar kayan aiki, dole ne a ƙayyade shi bisa ga buƙatun mai amfani, bisa ga dandamali.