Amashubhu wokuhlola we-Chemigen Oxygen (COD) angamathuluzi adingekayo wokuhlaziywa kwekhwalithi yamanzi, esetshenziswa kabanzi ekuhlolweni komasipala, kwezimboni nakwezemvelo. Lawa mashubhu akhethekile enzelwe ukubekezelela amazinga okushisa aphezulu kanye nezimo zamakhemikhali ezinokhahlo ngesikhathi senqubo yokugaya i-Cod. Masingene kwizici ezibalulekile kanye nemikhuba emihle yokusebenzisa amashubhu wokuhlola ama-COC.