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

Ingabe izilinganiso ze-COD ne-BOD ziyalingana?

Cha, i-COD ne-BOD aziwona umqondo ofanayo; nokho, bahlobene eduze.
Womabili amapharamitha angukhiye asetshenziselwa ukuhlola ukugcwala kokungcola kwemvelo emanzini, nakuba ehluka ngokwemigomo yokulinganisa kanye nobubanzi.

Okulandelayo kunikeza incazelo enemininingwane yokwehluka kwabo kanye nobudlelwano:

1. Isidingo Se-Chemical Oxygen (COD)

· Incazelo: I-COD ibhekisela enanini lomoya-mpilo odingekayo ukuze kukhishwe ngamakhemikhali zonke izinto eziphilayo emanzini kusetshenziswa i-oxidizing agent, ngokuvamile i-potassium dichromate, ngaphansi kwezimo ezine-asidi eqinile. Ivezwa ngamamiligremu omoya-mpilo ilitha ngalinye (mg/L).
· Isimiso: Chemical oxidation. Izinto eziphilayo zifakwe i-oxidized ngokuphelele ngama-reagents amakhemikhali ngaphansi kwezimo zokushisa okuphezulu (cishe amahora angu-2).
· Izinto ezilinganisiwe: I-COD ikala cishe zonke izinhlanganisela eziphilayo, okuhlanganisa kokubili izinto ezibolayo nezingaboli.

Izici:
· Ukulinganisa okusheshayo: Imiphumela ngokuvamile ingatholakala phakathi namahora angu-2–3.
· Ibanga elibanzi lokulinganisa: Amanani e-COD ngokuvamile adlula amanani e-BOD ngoba indlela ihlanganisa zonke izinto ezixutshwa ngamakhemikhali.
· Iyantula imininingwane ethile: I-COD ayikwazi ukuhlukanisa phakathi kwezinto eziphilayo ezingaboli nezingaboli.

2.Isidingo se-Oxygen ye-Biochemical (BOD)

· Incazelo: I-BOD ibhekisela enanini lomoya-mpilo oncibilikisiwe osetshenziswa amagciwane ngesikhathi sokubola kwento ephilayo ebolayo emanzini ngaphansi kwezimo ezithile (imvamisa engu-20 °C izinsuku ezingu-5, okuchazwa ngokuthi BOD₅). Iphinde ivezwe ngama-milligram ilitha ngalinye (mg/L).
· Isimiso: Biological oxidation. Ukucekelwa phansi kwento ephilayo yizidalwa ezincane ze-aerobic kulingisa inqubo yemvelo yokuzihlanza okwenzeka emanzini.
· Izinto ezilinganisiwe: I-BOD ikala ingxenye yento ephilayo engacekelwa phansi ngokwezinto eziphilayo.

Izici:
· Isikhathi eside sokulinganisa: Ubude besikhathi sokuhlola obujwayelekile izinsuku ezi-5 (BOD₅).
· Ibonisa izimo zemvelo: Inikeza ukuqonda mayelana namandla okusebenzisa umoya-mpilo wangempela wezinto eziphilayo endaweni yemvelo.
· Ukucaciswa okuphezulu: I-BOD isabela ngokukhethekile ezintweni eziphilayo ezingaboli.

3. Ukuxhumana kanye Nezicelo Ezisebenzayo

Naphezu kokuhlukana kwazo, i-COD ne-BOD zivame ukuhlaziya ndawonye futhi zibambe iqhaza elibalulekile ekuhloleni izinga lamanzi kanye nokwelashwa kwamanzi angcolile:

1) Ukuhlola i-biodegradability:
Isilinganiso se-BOD/COD sivame ukusetshenziselwa ukuhlola ukuthi kungenzeka yini izindlela zokwelapha zebhayoloji (isb, inqubo yodaka eyenziwe yasebenza).
· BOD/COD > 0.3: Ibonisa ukubola okuhle kwe-biodegradability, iphakamisa ukuthi ukwelashwa kwebhayoloji kufanelekile.
· I-BOD/COD < 0.3: Ibonisa ingxenye ephezulu yezinto eziphilayo eziphikisayo kanye nokubola kwe-biodegradability okubi. Ezimweni ezinjalo, izindlela zokwelapha ngaphambi kwesikhathi (isb., i-oxidation ethuthukisiwe noma i-coagulation sedimentation) ingase idingeke ukuze kuthuthukiswe ukubola kwe-biodegradability, noma ezinye izindlela zokwelapha ngamakhemikhali angadingeka.

2) Izimo zohlelo lokusebenza:
I-BOD: Isetshenziselwa kakhulu ukuhlola umthelela wemvelo wokuchitheka kwamanzi angcolile emanzini emvelo, ikakhulukazi mayelana nokuncipha komoyampilo kanye namandla awo okubangela ukufa kwezilwane zasemanzini.
· I-COD: Isetshenziselwa kakhulu ukuqapha ngokushesha imithwalo yokungcoliswa kwamanzi angcolile ezimbonini, ikakhulukazi lapho amanzi angcolile equkethe izinto ezinobuthi noma ezingaboli. Ngenxa yekhono layo lokulinganisa ngokushesha, i-COD ivame ukuqashwa ukuze kuqashwe ngesikhathi sangempela kanye nokulawulwa kwenqubo kumasistimu okuhlanza amanzi angcolile.

Isifinyezo Somehluko Oyinhloko

Isici	I-COD (Isidingo Se-Chemical Oxygen)	I-BOD (i-Biochemical Oxygen Demand)
Isimiso	I-Chemical oxidation	I-Biological oxidation (umsebenzi we-microbial)
I-oxidant	Ama-chemical oxidants aqinile (isb, i-potassium dichromate)	Ama-microorganisms we-Aerobic
Ububanzi bokulinganisa	Kufaka phakathi zonke izinto eziphilayo ezingaxutshwa ngamakhemikhali (kuhlanganise ne-non-biodegradable)	I-biodegradable organic matter kuphela
Ubude besikhathi sokuhlola	Kufushane (2–3 amahora)	Yinde (izinsuku ezi-5 noma ngaphezulu)
Ubudlelwano bezinombolo	I-COD ≥ BOD	BOD ≤ COD

Isiphetho:

I-COD ne-BOD yizinkomba ezihambisanayo zokuhlola ukungcoliswa kwemvelo emanzini kunezinyathelo ezilinganayo. I-COD ingabhekwa "njengesidingo se-oksijini esiphezulu" sazo zonke izinto eziphilayo ezikhona, kuyilapho i-BOD ibonisa "amandla okusebenzisa umoya-mpilo wangempela" ngaphansi kwezimo zemvelo.

Ukuqonda umehluko nokuhlobana phakathi kwe-COD ne-BOD kubalulekile ekuklameni izinqubo ezisebenzayo zokuhlanza amanzi angcolile, ukuhlola ikhwalithi yamanzi, nokusungula izindinganiso ezifanele zokulahla.

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

I-Shanghai Boqu Instrument Co., Ltd. igxile ekuhlinzekeni ngohlu olubanzi lwezihlaziyi zekhwalithi zamanzi ezisebenza ku-inthanethi ze-COD ne-BOD esebenza ku-inthanethi. Amathuluzi ethu okuhlaziya ahlakaniphile anika amandla ukuqapha kwesikhathi sangempela nokunembile, ukudluliswa kwedatha okuzenzakalelayo, nokuphathwa okusekelwe emafini, ngaleyo ndlela kusiza ukusungulwa okuphumelelayo kwesistimu yokuqapha amanzi okude nohlakaniphile.

Bhala umyalezo wakho lapha futhi usithumelele wona

Isikhathi sokuthumela: Sep-10-2025