Iindaba - Ngaba i-COD kunye ne-BOD imilinganiselo iyalingana?

Ngaba imilinganiselo yeCOD kunye neBOD iyalingana?

Hayi, i-COD kunye ne-BOD azikho ingcamango efanayo; nangona kunjalo, zihlobene ngokusondeleyo.
Zombini iiparameters eziphambili ezisetyenziselwa ukuvavanya ukuxinwa kwezinto ezingcolisayo emanzini, nangona zihluke ngokwemigaqo yokulinganisa kunye nobubanzi.

Oku kulandelayo kunika inkcazo eneenkcukacha yeeyantlukwano kunye nobudlelwane babo:

1. Imfuno ye-Oxygen yeMichiza (COD)

· Inkcazelo: I-COD ibhekiselele kubungakanani beoksijini efunekayo ukuze kufakwe ikhemikhali yonke into ephilayo emanzini kusetyenziswa i-agent eyomeleleyo ye-oxidizing, eyi-potassium dichromate, phantsi kweemeko ezineasidi emandla. Ibonakaliswa ngeemilligrams zeoksijini ilitha nganye (mg / L).
· Umgaqo-siseko: I-chemical oxidation. Izinto eziphilayo zixutywe ngokupheleleyo ngee-reagents zeekhemikhali phantsi kweemeko eziphezulu zokushisa (malunga neeyure ezi-2).
· Izinto ezilinganisiweyo: I-COD ilinganisa phantse zonke iikhompawundi eziphilayo, kubandakanywa zombini imathiriyeli enokubola kunye ne-non-biodegradable.

Iimpawu:
· Umlinganiselo okhawulezayo: Iziphumo zinokufumaneka kwiiyure ezi-2–3.
· Uluhlu olubanzi lomlinganiselo: Amaxabiso e-COD agqithisa amaxabiso e-BOD kuba indlela ithatha zonke izinto ezinokonakalisa ikhemikhali.
· Ayinanto ikhethekileyo: I-COD ayinako ukwahlula phakathi kwezinto eziphilayo ezinokonakala kunye nezingaboliyo.

2.Imfuno ye-Oxygen yeBiochemical (BOD)

· Inkcazo: I-BOD ibhekiselele kwisixa se-oksijini enyibilikisiweyo esetyenziswe yi-microorganisms ngexesha lokubola kwe-biodegradable organic matter emanzini phantsi kweemeko ezithile (ngokuqhelekileyo i-20 °C iintsuku ezi-5, ezichazwe njenge-BOD₅). Ikwabonakaliswa ngeemilligrams ilitha nganye (mg/L).
· Umgaqo: Biological oxidation. Ukuthotywa kwe-organic matter yi-aerobic microorganisms ilinganisa inkqubo yendalo yokuzicoca eyenzeka kumanzi.
· Amachiza amisiweyo: I-BOD ilinganisa kuphela iqhezu le-organic matter enokonakala ngokwebhayoloji.

Iimpawu:
· Ixesha lokulinganisa ixesha elide: Ubude bovavanyo oluqhelekileyo ziintsuku ezi-5 (BOD₅).
· Ibonakalisa iimeko zendalo: Inika ingqiqo kweyona nto inokwenzeka yokusetyenziswa kweoksijini kwizinto eziphilayo kwindawo yendalo.
· Iimpawu eziphezulu: I-BOD iphendula ngokukodwa kwizinto eziphilayo ezinokonakala.

3. Unxibelelwano kunye nezicelo eziSebenzayo

Ngaphandle kokwahluka kwazo, i-COD kunye ne-BOD zihlala zihlalutywa kunye kwaye zidlala indima ebalulekileyo kuvavanyo lomgangatho wamanzi kunye nokucocwa kwamanzi amdaka:

1) Uvavanyo lwe-biodegradability:
Umlinganiselo weBOD/COD udla ngokusetyenziswa ukuvavanya ukubanakho kweendlela zonyango lwebhayoloji (umzekelo, inkqubo yodaka olusebenzayo).
· I-BOD/COD > 0.3: Ibonisa ukonakaliswa kakuhle kwezinto eziphilayo, icebisa ukuba unyango lwebhayoloji lufanelekile.
· I-BOD / COD <0.3: Ibonisa umlinganiselo ophezulu wezinto eziphilayo eziphikisayo kunye ne-biodegradability embi. Kwiimeko ezinjalo, iindlela zonyango lwangaphambili (umzekelo, i-oxidation ephezulu okanye i-coagulation sedimentation) inokufuneka ukunyusa ukubola kwe-biodegradability, okanye ezinye iindlela zonyango lwekhemikhali yomzimba zinokuba yimfuneko.

2) Iimeko zesicelo:
I-BOD: Isetyenziselwa ukuvavanya impembelelo ye-ikholoji yokukhutshelwa kwamanzi amdaka kumanzi endalo, ngakumbi malunga nokuphela kweoksijini kunye namandla ayo okubangela ukufa kobomi basemanzini.
I-COD: Isetyenziswa kakhulu ukujonga ngokukhawuleza imithwalo yokungcoliseka kwamanzi amdaka kwimizi-mveliso, ngakumbi xa amanzi amdaka equlethe izinto eziyityhefu okanye ezingaboliyo. Ngenxa yesakhono sayo sokulinganisa ngokukhawuleza, i-COD isoloko isetyenziselwa ukubeka iliso ngexesha lokwenyani kunye nolawulo lwenkqubo kwiinkqubo zokucocwa kwamanzi amdaka.

Isishwankathelo seeMahluko ezingundoqo

Uphawu	I-COD (Imfuno ye-Oxygen yeKhemikhali)	I-BOD (Imfuno ye-Oxygen yeBiochemical)
Umgaqo	Ukukhutshwa kweekhemikhali	I-Biological oxidation (umsebenzi we-microbial)
I-oxidant	Ii-oxidants zekhemikhali ezinamandla (umz., i-potassium dichromate)	Aerobic microorganisms
Ubungakanani bomlinganiselo	Ibandakanya yonke into ephilayo enokuxutywa nekhemikhali (kubandakanywa ne-non-biodegradable)	Kuphela i-biodegradable organic matter
Ubude bexesha lovavanyo	Mfutshane (2–3 iiyure)	Ixesha elide (iintsuku ezi-5 okanye ngaphezulu)
Ubudlelwane bamanani	COD ≥ BOD	BOD ≤ COD

Isiphelo:

I-COD kunye ne-BOD zizibonakaliso ezihambelanayo zokuvavanya ungcoliseko lwendalo emanzini kunokuba kulinganiswe amanyathelo alinganayo. I-COD inokuthathwa njenge "thiyori ephezulu yemfuno yeoksijini" yazo zonke izinto eziphilayo ezikhoyo, ngelixa iBOD ibonisa "eyona nto inokwenzeka yokusetyenziswa kweoksijini" phantsi kweemeko zendalo.

Ukuqonda umahluko kunye nobudlelwane phakathi kwe-COD kunye ne-BOD kubalulekile ekuyileni iinkqubo ezisebenzayo zokucocwa kwamanzi amdaka, ukuvavanya umgangatho wamanzi, kunye nokumisela imigangatho efanelekileyo yokulahla.

TP TN CODMn Nitrate nitrogen COD BOD Ammonia nitrogen analyzer

I-Shanghai Boqu Instrument Co., Ltd. igxile ekuboneleleni uluhlu olubanzi lwe-COD ephezulu yokusebenza kunye ne-BOD ye-intanethi yokuhlaziya umgangatho wamanzi. Izixhobo zethu zokuhlalutya ezihlakaniphile zenza ixesha lokwenyani kunye nexesha elichanekileyo lokubeka iliso, ukuhanjiswa kwedatha ngokuzenzekelayo, kunye nolawulo olusekwe kwifu, ngaloo ndlela kuququzelela ukusekwa ngokufanelekileyo kwenkqubo yokubeka iliso yamanzi ekude kunye nengqiqo.

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Ixesha lokuposa: Sep-10-2025