Izindaba - Ingabe izilinganiso ze-COD ne-BOD ziyalingana?

Ingabe izilinganiso ze-COD ne-BOD ziyalingana?

Cha, i-COD ne-BOD azifani; nokho, zihlobene kakhulu.
Zombili ziyimingcele ebalulekile esetshenziselwa ukuhlola ukugcwala kokungcola kwezinto eziphilayo emanzini, yize zihlukile ngokwemigomo yokulinganisa kanye nobubanzi.

Okulandelayo kunikeza incazelo eningiliziwe yomehluko kanye nobudlelwano babo:

1. Isidingo Se-Oksijini Yamakhemikhali (i-COD)

· Incazelo: I-COD ibhekisela enanini lomoya-mpilo odingekayo ukuze kufakwe amakhemikhali kuzo zonke izinto eziphilayo emanzini kusetshenziswa i-oxidizing agent enamandla, ngokuvamile i-potassium dichromate, ngaphansi kwezimo ze-acidic enamandla. Ivezwa ngama-milligram omoya-mpilo ngelitha (mg/L).
· Isimiso: Ukushiswa kwamakhemikhali. Izinto eziphilayo zishiswa ngokuphelele ngama-reagent amakhemikhali ngaphansi kwezimo zokushisa okuphezulu (cishe amahora ama-2).
· Izinto ezilinganisiwe: I-COD ilinganisa cishe zonke izinto eziphilayo, okuhlanganisa izinto ezibolayo nezibolayo.

Izici:
· Ukulinganisa okusheshayo: Imiphumela ngokuvamile ingatholakala zingakapheli amahora angu-2-3.
· Ububanzi bokulinganisa: Amanani e-COD ngokuvamile adlula amanani e-BOD ngoba indlela ihlanganisa zonke izinto ezikwazi ukubola ngamakhemikhali.
· Ayinawo umbalo ocacile: I-COD ayikwazi ukuhlukanisa phakathi kwezinto eziphilayo ezibolayo nezibolayo.

2. Isidingo Se-Oxygen Ye-Biochemical (i-BOD)

· Incazelo: I-BOD ibhekisela enanini lomoya-mpilo oncibilikisiwe odliwa yizinto ezincane ngesikhathi sokubola kwezinto eziphilayo ezibola emanzini ngaphansi kwezimo ezithile (ngokuvamile ezingama-20 °C izinsuku ezi-5, ezibizwa ngokuthi i-BOD₅). Iphinde ivezwe ngama-milligram ngelitha (mg/L).
· Isimiso: Ukushiswa kwezinto eziphilayo. Ukuwohloka kwezinto eziphilayo yizinto ezincane ezisebenza nge-aerobic kulingisa inqubo yokuzihlanza yemvelo eyenzeka emizimbeni yamanzi.
· Izinto ezilinganisiwe: I-BOD ilinganisa kuphela ingxenye yezinto eziphilayo ezingabola ngokwezinto eziphilayo.

Izici:
· Isikhathi eside sokulinganisa: Isikhathi esijwayelekile sokuhlola izinsuku ezi-5 (BOD₅).
· Ibonisa izimo zemvelo: Inikeza ukuqonda ngamandla okusetshenziswa komoya-mpilo kwezinto eziphilayo ezindaweni zemvelo.
· Ukucaciswa okuphezulu: I-BOD isabela kuphela ezintweni eziphilayo ezibolayo.

3. Ukuxhumana kanye nezicelo ezisebenzayo

Naphezu kokungafani kwazo, i-COD ne-BOD zivame ukuhlaziywa ndawonye futhi zidlala indima ebalulekile ekuhlolweni kwekhwalithi yamanzi kanye nokwelashwa kwamanzi amdaka:

1) Ukuhlola ukubola kwezitshalo:
Isilinganiso se-BOD/COD sivame ukusetshenziswa ukuhlola ukuthi kungenzeka yini izindlela zokwelapha ngebhayoloji (isb., inqubo yodaka olusebenzayo).
· I-BOD/COD > 0.3: Ibonisa ukubola okuhle, okuphakamisa ukuthi ukwelashwa kwezinto eziphilayo kuyafaneleka.
· I-BOD/COD < 0.3: Ibonisa inani elikhulu lezinto eziphilayo ezingaguquki kanye nokubola okungekuhle. Ezimweni ezinjalo, izindlela zokwelapha zangaphambi kwesikhathi (isb., i-oxidation ethuthukisiwe noma i-coagulation sedimentation) zingadingeka ukuze kuthuthukiswe ukubola, noma ezinye izindlela zokwelapha ngokomzimba namakhemikhali zingadingeka.

2) Izimo zohlelo lokusebenza:
· I-BOD: Isetshenziswa kakhulu ukuhlola umthelela wokukhishwa kwamanzi amdaka emvelweni ezindaweni zamanzi zemvelo, ikakhulukazi maqondana nokuncipha komoya-mpilo kanye namathuba awo okubangela ukufa kwezilwane zasemanzini.
· I-COD: Isetshenziswa kabanzi ekuqapheni ngokushesha imithwalo yokungcoliswa kwamanzi amdaka ezimbonini, ikakhulukazi lapho amanzi amdaka equkethe izinto ezinobuthi noma ezingaboli. Ngenxa yamandla ayo okulinganisa okusheshayo, i-COD ivame ukusetshenziswa ekuqapheni ngesikhathi sangempela kanye nokulawula izinqubo ezinhlelweni zokwelashwa kwamanzi amdaka.

Isifinyezo Somehluko Omkhulu

Isici	I-COD (Isidingo Se-Oxygen Yamakhemikhali)	I-BOD (Isidingo Se-Oxygen Ye-Biochemical)
Isimiso	Ukushiswa kwamakhemikhali	Ukushiswa kwezinto eziphilayo (umsebenzi we-microbial)
I-Oxidant	Ama-oxidant anamandla amakhemikhali (isb., i-potassium dichromate)	Ama-microorganisms e-aerobic
Ububanzi bokulinganisa	Kuhlanganisa zonke izinto eziphilayo ezikwazi ukubola ngamakhemikhali (kufaka phakathi ezingabola)	Izinto eziphilayo ezibolayo kuphela
Ubude bokuhlolwa	Okufushane (amahora angu-2–3)	Isikhathi eside (izinsuku ezi-5 noma ngaphezulu)
Ubudlelwano bezinombolo	I-COD ≥ I-BOD	I-BOD ≤ I-COD

Isiphetho:

I-COD kanye ne-BOD ziyizinkomba ezihambisanayo zokuhlola ukungcola kwezinto eziphilayo emanzini kunezilinganiso ezilinganayo. I-COD ingabhekwa njenge "isidingo esiphezulu se-oxygen" sayo yonke into ephilayo ekhona, kanti i-BOD ibonisa "amandla okusetshenziswa kwe-oxygen yangempela" ngaphansi kwezimo zemvelo.

Ukuqonda umehluko kanye nobudlelwano phakathi kwe-COD ne-BOD kubalulekile ekwakheni izinqubo zokwelashwa kwamanzi amdaka ezisebenzayo, ukuhlola ikhwalithi yamanzi, kanye nokusungula amazinga okukhipha amanzi afanele.

I-TP TN CODMn Nitrate nitrogen COD BOD I-Ammonia nitrogen analyzer

I-Shanghai Boqu Instrument Co., Ltd. igxile ekuhlinzekeni uhla olubanzi lwezihlaziyi zamanzi ze-COD kanye ne-BOD ezisebenza kahle kakhulu online. Amathuluzi ethu okuhlaziya ahlakaniphile avumela ukuqapha ngesikhathi sangempela nangokunembile, ukudluliselwa kwedatha okuzenzakalelayo, kanye nokuphathwa okusekelwe efwini, ngaleyo ndlela kube lula ukusungulwa kahle kohlelo lokuqapha amanzi olukude noluhlakaniphile.

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Isikhathi sokuthunyelwe: Septhemba-10-2025