Ishishini ngokuqinisekileyo liya kuvelisa inani elikhulu lamanzi amdaka, amanzi amdaka aqulathe i-oyile, izinto eziqinileyo ezinqunyanyisiweyo, isinyithi esinzima, kunye nezinye izinto ezinobungozi kunye nogwebu, ukukhutshwa ngokuthe ngqo kuya kungcolisa okusingqongileyo. I-Environmental Monitoring Bureau ineemfuno eziphezulu zokunyanga ilindle kunye novavanyo olungqongqo. Inkqubo yokucocwa kwamanzi amdaka inzima, kwaye kulula ukuhlangabezana neengxaki ze-foam kwinkqubo yonyango.

Ukucocwa kogutyulo ngokwenqanaba lokwahlulahlula, kwahlulwe kwaba yinye, ezimbini, ezintathu zokunyanga amanzi. Nangona kunjalo, ngenxa yenkqubo yonyango kunye nomgangatho wamanzi amdaka, inkqubo yokucocwa kwamanzi amdaka kulula ukuyikhupha, nto leyo iyimfuneko yokusebenzisa i-defoamer yokucoca i-lindle for defoaming.

Ukucocwa kogutyulo nokuba igwebu elibangelwa ngamacandelo omgangatho wamanzi, okanye igwebu elibangelwa yinkqubo yonyango. Ukungaphathwa ngexesha elifanelekileyo kuya kuba nefuthe elibi kwinkqubo yonyango, echaphazela ukukhutshwa komgangatho wamanzi. Ukuze ucombulule ingxaki ye-foam emanzini amdaka, ukongeza i-defoamer yindlela efanelekileyo.
Ngokweempawu zobuchwepheshe bokucocwa kwamanzi amdaka kunye nomgangatho wamanzi, i-defoamer yokucoca amanzi amdaka ephuhlisiwe yifomula egxininisiweyo ye-defoamer eyenziwe nge-polyether kunye ne-silicone. I-defoamer iphuhliswa ziinjineli ze-defoamer zobuchwephesha, inomsebenzi olungileyo, kwaye inokusombulula iingxaki ezahlukeneyo zogwebu kunyango lwamanzi amdaka. Le defoamer idityaniswe ngezinto ezikumgangatho ophezulu, uxinaniso lwefomula luphezulu, kwaye lunokongezwa ngokuthe ngqo kwinkqubo yokucoca ugutyulo. Kuphela isixa esincinci esifunekayo ukufezekisa isiphumo esihle sokwenza amagwebu. Ngokweenkqubo ezahlukeneyo ze-foam kunye nexabiso le-foam, isixa songezwa ngokufanelekileyo; Xa usebenzisa, sebenzisa amaxesha angama-1 ukuya ku-5 ukuhlanjululwa kwamanzi ukuze udibanise ngokulinganayo okanye udibanise ngokuthe ngqo (ulula ukubeka emva kokuhlanjululwa, kufuneka usebenzise ngokukhawuleza), unokuphinda udibane nomenzi wokusetyenziswa okuthe ngqo.