Ingaruka ziterwa na ogisijeni ikabije (COD) mumazi kubuzima bwabantu nibidukikije ni ngombwa. COD ikora nk'ikimenyetso cy'ingenzi cyo gupima ubunini bw’imyanda ihumanya muri sisitemu yo mu mazi. Urwego rwa COD ruzamutse rwerekana umwanda ukabije, uteza ingaruka zikomeye kubidukikije ndetse nubuzima rusange.

Ibinyabuzima bifite ubumara byinjira mu mazi birashobora kwangiza ibinyabuzima byo mu mazi, harimo n’amafi, kandi birashobora kwirundanyiriza mu ruhererekane rw’ibiribwa, amaherezo bikinjira mu mubiri w’umuntu bikabatera uburozi budakira. Kurugero, kumara igihe kinini uhura nibintu nka DDT byajyanye ningaruka mbi kuri sisitemu yimitsi, kwangirika kwumwijima, imikorere mibi yumubiri, hamwe nihungabana rishobora kuvuka mumyororokere na genetike, harimo no kongera ibyago byo kuvuka bidasanzwe hamwe na kanseri.

Urwego rwo hejuru rwa COD narwo ruhungabanya ubuziranenge bw’amazi no guhungabanya ibidukikije. Iyo imyanda ihumanya yinjiye mu nzuzi no mu biyaga bitavuwe ku gihe, ibyinshi byinjira mu mwobo wo hasi. Igihe kirenze, ibyo bintu byegeranijwe bigira ingaruka zigihe kirekire mubuzima bwamazi. Ibi bigaragarira muburyo bubiri bwibanze: icya mbere, impfu nyinshi z’ibinyabuzima byo mu mazi zishobora kubaho, guhungabanya urusobe rw’ibinyabuzima kandi bishobora gutuma habaho gusenyuka kw'ibinyabuzima byose byo mu mazi; icya kabiri, uburozi bugenda buhoro buhoro bioaccumule mubinyabuzima nk'amafi n'ibishishwa. Kurya abantu kurya ibiryo byanduye byanduye bituma habaho kwimura no kwegeranya ibyo bintu byangiza mumubiri, bikagira ingaruka zikomeye kumagara maremare, harimo kanseri, imikorere mibi yiterambere, hamwe nihindagurika ryimiterere.

Byongeye kandi, urugero rwinshi rwa COD rwangiza ubushobozi busanzwe bwo kwisukura bwamazi. Kwangirika kw'ibintu kama bitwara ogisijeni yashonze (DO), kandi iyo ogisijeni irenze igipimo cya reoxygene, urwego rwa DO rushobora kugabanuka kuri zeru, bikaviramo imiterere ya anaerobic. Mu bihe nk'ibi, ibikorwa bya mikorobe ya anaerobic birakomeza, bitanga gaze ya hydrogène sulfide kandi bigatuma amazi yijimye kandi agasohora impumuro mbi - ibyo bikaba ari ibintu bisanzwe byerekana umwanda ukabije.

Gukoresha abasesengura COD bigira uruhare runini mugukurikirana no gukumira urugero rwa COD rukabije. Isesengura rya Boqu'COD rikoreshwa cyane mugusuzuma amazi yo hejuru, amazi yubutaka, imyanda yo mu ngo, n’amazi y’inganda. Ifasha byihuse ibizamini byihutirwa no gusesengura neza amazi ashingiye kuri laboratoire, ikaba igikoresho kinini cyo gukurikirana ibidukikije no kurwanya umwanda.