Te mōhiotanga mō te tātaritanga COD BOD

Me pēhea te ine i te BOD me te COD?

He maha ngā tikanga ka taea te whakamahi hei ine i te BOD (Te Tono Hāora Koiora) me te COD (Te Tono Hāora Matū) i roto i te wai. Anei tētahi tirohanga poto mō ngā tikanga matua e rua:

Tikanga whakakōkī: I roto i te tikanga whakakōkī, ka whakakōkīhia he nui o te wai e mōhiotia ana ki tētahi nui o te wai whakakōkī, he iti noa iho ngā taumata o te matū waro kei roto. Kātahi ka whakakōkīhia te tauira whakakōkī mō tētahi wā motuhake (e 5 ngā rā te nuinga) i te pāmahana whakahaeretia (e 20°C te nuinga). Ka inehia te kukū o te hāora i roto i te tauira i mua atu, ā, i muri i te whakakōkī. Ka whakamahia te rerekētanga o te kukū o te hāora i mua atu, ā, i muri i te whakakōkī hei tatau i te BOD o te tauira.

Hei ine i te COD, ka whaihia tētahi tukanga ōrite, engari ka rongoatia te tauira ki tētahi matū whakapūkara (pērā i te pāhare pākawa dichromate) kaua ki te whakatōkia. Ko te kukū o te hāora e pau ana i te tauhohenga matū ka whakamahia hei tatau i te COD o te tauira.

Tikanga ine manawa: I roto i te tikanga ine manawa, ka whakamahia he ipu hiri (e kiia ana ko te ine manawa) hei ine i te nui o te hāora e pau ana i ngā moroiti i a rātou e wawahi ana i ngā mea rauropi i roto i te tauira wai. Ka inehia te kukū hāora i roto i te ine manawa i roto i tētahi wā motuhake (e 5 ngā rā te nuinga) i te pāmahana whakahaeretia (e 20°C te nuinga). Ka tatauhia te BOD o te tauira i runga i te tere o te hekenga o te kukū hāora i roto i te wā.

He tikanga paerewa te tikanga whakananu me te tikanga respirometer e whakamahia ana puta noa i te ao hei ine i te BOD me te COD i roto i te wai.

He aha te rohenga o te BOD me te COD?

Ko te BOD (Te Tono Hāora Koiora) me te COD (Te Tono Hāora Matū) he ine i te nui o te hāora e hiahiatia ana hei wawahi i ngā mea rauropi i roto i te wai. Ka taea te whakamahi i ngā taumata BOD me te COD hei aromatawai i te kounga o te wai me te pānga pea o te tukunga o te wai para ki roto i ngā wai tūturu.

Ko ngā herenga BOD me COD he paerewa e whakamahia ana hei whakahaere i ngā taumata o te BOD me te COD i roto i te wai. Ko ēnei herenga ka whakatakotoria e ngā tari whakahaere, ā, e ahu mai ana i ngā taumata e whakaaetia ana o te matū rauropi i roto i te wai, kāore e pā kino ki te taiao. Ko ngā herenga BOD me COD ka whakaatuhia i roto i ngā mirikaramu o te hāora mō ia rita o te wai (mg/L).

Ka whakamahia ngā herenga BOD hei whakahaere i te nui o ngā mea rauropi i roto i te wai para e tukuna ana ki ngā wai tūturu, pērā i ngā awa me ngā roto. Ka taea e ngā taumata tiketike o te BOD i roto i te wai te whakaiti i te nui o te hāora o te wai, me te kino hoki ki ngā mea ora o te wai. Nō reira, me tutuki i ngā whare maimoatanga wai para ngā herenga BOD motuhake i te wā e tukuna ana ō rātou wai para.

Ka whakamahia ngā herenga COD hei whakahaere i ngā taumata o ngā mea rauropi me ētahi atu poke i roto i ngā wai para ahumahi. Ka taea e ngā taumata COD teitei i roto i te wai te tohu i te noho mai o ngā matū paitini, ngā matū kino rānei, ā, ka taea hoki te whakaiti i te nui o te hāora o te wai me te kino ki ngā mea ora i roto i te wai. Ko te tikanga, me tutuki e ngā whare ahumahi ngā herenga COD motuhake i te wā e tukuna ana ā rātou wai para.

I te nuinga, he mea nui ngā herenga BOD me COD hei tiaki i te taiao me te whakarite i te kounga o te wai i roto i ngā wai tūturu.