Imboni nakanjani izokhiqiza inani elikhulu lamanzi angcolile, amanzi angcolile aqukethe uwoyela, okuqinile okumisiwe, izinsimbi ezisindayo, nezinye izinto eziyingozi kanye negwebu, ukuchithwa okuqondile kuzongcolisa indawo ezungezile. I-Environmental Monitoring Bureau inezidingo eziphezulu zokuhlanza indle kanye nokuhlolwa okuqinile. Inqubo yokuhlanza amanzi angcolile iyinkimbinkimbi, futhi kulula ukubhekana nezinkinga zegwebu ngesikhathi sokwelashwa.

Ukwelashwa kwendle ngokwezinga lokuhlukaniswa, ihlukaniswe yaba eyodwa, ezimbili, ezintathu zokwelashwa kwamanzi. Kodwa-ke, ngenxa yenqubo yokwelashwa kanye nekhwalithi yendle, inqubo yokuhlanza indle kulula ukuyibhula, okuyisidingo sokusebenzisa i-defoamer yokwelashwa kwendle ukuze kukhishwe amagwebu.

Ukwelashwa kwendle kungakhathaliseki ukuthi igwebu elibangelwa izingxenye zekhwalithi yamanzi, noma igwebu elibangelwa inqubo yokwelapha. Ukwelashwa okufika ngesikhathi kuzoba nomthelela omubi ohlelweni lokwelapha, okuthinta ukukhishwa kwekhwalithi yamanzi. Ukuze uxazulule inkinga ye-foam emanzini angcolile, ukwengeza i-defoamer kuyindlela enhle.
Ngokwezici zobuchwepheshe bokuhlanza indle kanye nekhwalithi yamanzi, i-defoamer yokuhlanza indle eyakhiwe iyifomula egxilile ye-defoamer eyakhiwe nge-polyether ne-silicone. I-defoamer ithuthukiswa onjiniyela be-defoamer abangochwepheshe, inokusebenza okuhle, futhi ingaxazulula izinkinga ezahlukahlukene zegwebu ekuhlanzeni indle. Le defoamer ihlanganiswa nezinto ezingavuthiwe zekhwalithi ephezulu, ukugxilwa kwefomula kuphakeme uma kuqhathaniswa, futhi ingengezwa ngokuqondile enqubweni yokuhlanza indle. Inani elincane kuphela elidingekayo ukuze kuzuzwe umphumela omuhle wokukhipha amagwebu. Ngokusho kwezinhlelo ezihlukene zokugwedla kanye nenani legwebu, inani lengezwe ngokufanele; Uma usebenzisa, sebenzisa izikhathi ezi-1 kuya kwezi-5 zokuhlanjululwa kwamanzi ukuze wengeze ngokulinganayo noma wengeze ngokuqondile (kulula ukusendlalela ngemva kokuhlanjululwa, okudingeka ukusebenzise ngokushesha ngangokunokwenzeka), ungase futhi uthintane nomkhiqizi ukuze usetshenziswe okuthile.