Kwizwe lokusebenzisa izinto ezihlukileyo nokucleansa, ukuphatha izindiza kuyisiphephelo esikhulu sesikhathi. Izindiza ziyizinto ezingaphansi ekuphatheni kwemifula, na kumaqhina noma emazini okuphatha imifula. Lezi zindiza zingalula futhi zingabonakala njengokugcina amasiko, futhi zingaqondwa kakhulu. Ukususa noma ukusebenzisa kabusha kuzo kuyindlela engekhoyo futhi ibizwa ngokukhulu. Lokhu kukhona kulezi zinto zokuphatha okulinganayo isifiltara sesibhobho nesihlangothi izimashini zifika. Khumbula lokhu njengendlela eyinkulu yokususa amanzi kusuka kwe-sludge, okwenza ukuthi ibe yincane kakhulu futhi isebenziselwa ngokumangalisayo. Yilokhu okuhle kakhulu kokubhala izimboni ezinamandla okunakekela umhlaba ngokuthinteka kwezinkinga eziphambili.