Imizi-mveliso ngokuqinisekileyo iya kuvelisa inani elikhulu lamanzi amdaka, amanzi amdaka aneoyile, izinto eziqinileyo ezixhonyiweyo, iintsimbi ezinzima, nezinye izinto eziyingozi kunye negwebu, ukukhutshwa ngokuthe ngqo kuya kungcolisa okusingqongileyo okungqongileyo. I-Environmental Monitoring Bureau ineemfuno eziphezulu zokunyangwa kwamanzi amdaka kunye novavanyo olungqongqo. Inkqubo yokunyangwa kwamanzi amdaka iyinkimbinkimbi, kwaye kulula ukudibana neengxaki zegwebu kwinkqubo yokunyangwa.

Unyango lwamanzi amdaka ngokwenqanaba lolwahlulo, lwahlulwe lwaba lunyango lwamanzi olunye, ezimbini, ezintathu. Nangona kunjalo, ngenxa yenkqubo yonyango kunye nomgangatho wamanzi amdaka, inkqubo yonyango lwamanzi amdaka kulula ukuyikhupha, nto leyo eyimfuneko yokusebenzisa i-sewage treatment defoamer ukucoca amanzi amdaka.

Unyango lwamanzi amdaka nokuba lubangelwa zizinto ezisemgangathweni wamanzi, okanye lubangelwa yinkqubo yokunyanga. Ukungalungiswa ngexesha elifanelekileyo kuya kuba nefuthe elibi kwinkqubo yokunyanga, okuchaphazela ukukhutshwa komgangatho wamanzi. Ukuze kusonjululwe ingxaki yegwebu emanzini amdaka, ukongeza i-defoamer yindlela elungileyo.
Ngokweempawu zobuchwepheshe bokucoca amdaka kunye nomgangatho wamanzi, i-defoamer yokucoca amdaka eyenziweyo yifomyula ehlanganisiweyo ye-defoamer eyenziwe nge-polyether kunye ne-silicone. I-defoamer yenziwe ziinjineli zee-defoamer ezingoochwephesha, ifanelekile, kwaye inokusombulula iingxaki ezahlukeneyo ze-foam ekucoceni amdaka. Le defoamer yenziwe ngezinto eziluhlaza ezikumgangatho ophezulu, uxinaniso lwefomyula luphezulu, kwaye inokongezwa ngokuthe ngqo kwinkqubo yokucoca amdaka. Kufuneka isixa esincinci kuphela ukuze kufezekiswe isiphumo esihle sokucocwa amdaka. Ngokweenkqubo ezahlukeneyo zokucocwa kwamdaka kunye nobungakanani be-foam, isixa songezwa njengoko kufanelekile; Xa usebenzisa, sebenzisa ukucocwa kwamanzi okuphindwe ka-1 ukuya ka-5 ukuze wongeze okanye wongeze ngokulinganayo (kulula ukuwenza emva kokucocwa, kufuneka uyisebenzise ngokukhawuleza), ungaqhagamshelana nomenzi ukuze uyisebenzise ngokuthe ngqo.