He ōrite ngā inenga COD me BOD?

2. Te Hiahia Hāora Matū koiora (BOD)

· Whakamāramatanga: Ko te BOD e pā ana ki te nui o te hāora rewa e pau ana i ngā moroiti i te wā e pirau ana ngā mea waro pirau i roto i te wai i raro i ngā āhuatanga motuhake (e 20 °C te nuinga mō ngā rā e 5, e tohuhia ana ko te BOD₅). Ka whakaatuhia hoki i roto i ngā mirikaramu ia rita (mg/L).
· Mātāpono: Te waikura koiora. Ko te whakahoro o ngā mea rauropi e ngā moroiti ā-hauora e whakatauira ana i te tukanga purenga-ā-roto e puta ana i roto i ngā wai.
· Ngā matū i inehia: Ka ine noa te BOD i te wāhanga o ngā mea rauropi ka taea te pirau i te taha koiora.

Ngā Āhuatanga:
· Te roa o te wā ine: Ko te roanga whakamātautau paerewa he 5 rā (BOD₅).
· E whakaata ana i ngā āhuatanga o te taiao: E whakarato ana i te māramatanga ki te kaha o te whakamahinga hāora o ngā mea rauropi i roto i ngā taiao taiao.
· Teitei te motuhaketanga: Ka aro noa te BOD ki ngā matū waro pirau-koiora.

3. Hononga me ngā Whakamahinga Whaihua

Ahakoa ō rāua rerekētanga, ka tātarihia ngātahitia te COD me te BOD, ā, he mea nui tā rāua mahi i roto i te aromatawai i te kounga wai me te maimoatanga wai para:

1) Te aromatawai i te pirau o te koiora:
Ko te ōwehenga BOD/COD e whakamahia whānuitia ana hei aromatawai i te whaihua o ngā tikanga maimoatanga koiora (hei tauira, te tukanga paru whakahohe).
· BOD/COD > 0.3: He tohu pai mō te pirau-koiora, e tohu ana he pai te maimoatanga koiora.
· BOD/COD < 0.3: E tohu ana i te nui o te ōwehenga o ngā mea waro ātete-kore, ā, he ngoikore te pirau-koiora. I roto i ēnei āhuatanga, me whakamahi pea ngā tikanga maimoatanga-mua (hei tauira, te whakahāngaitanga matatau, te whakatōtōtanga toto rānei) hei whakarei ake i te pirau-koiora, me whakamahi rānei i ētahi atu huarahi maimoatanga ā-tinana-matū.

2) Ngā horopaki tono:
· BOD: E whakamahia ana hei aromatawai i te pānga ā-taiao o te tukunga wai para ki ngā wai tūturu, inā koa mō te whakahekenga o te hāora me tōna kaha ki te mate i ngā mea ora i roto i te wai.
· COD: He whānuitia te whakamahinga mō te aroturuki tere i ngā kawenga parahanga waipara ahumahi, inā koa kei roto i te waipara he matū paitini, he matū kore-pirau rānei. Nā te tere o te ine, he maha ngā wā ka whakamahia te COD mō te aroturuki wā-tūturu me te whakahaere tukanga i roto i ngā pūnaha maimoatanga waipara.

Whakarāpopototanga o ngā Rerekētanga Matua