Izindaba - Ulwazi mayelana nomhlaziyi we-COD BOD

KuyiniIsihlaziyi se-COD BOD?

I-COD (Chemical Oxygen Demand) kanye ne-BOD (Biological Oxygen Demand) ziyizilinganiso ezimbili zenani lomoya-mpilo odingekayo ukuze kuhlukaniswe izinto eziphilayo emanzini. I-COD iyisilinganiso somoya-mpilo odingekayo ukuze kuhlukaniswe izinto eziphilayo ngamakhemikhali, kanti i-BOD iyisilinganiso somoya-mpilo odingekayo ukuze kuhlukaniswe izinto eziphilayo ngebhayoloji, kusetshenziswa amagciwane.

I-COD/BOD analyzer iyithuluzi elisetshenziselwa ukukala i-COD kanye ne-BOD yesampula yamanzi. Laba bahlaziyi basebenza ngokulinganisa ukuhlushwa komoya-mpilo kusampula yamanzi ngaphambi nangemva kokuba izinto eziphilayo zivunyelwe ukuwohloka. Umehluko ekuhlushweni komoya-mpilo ngaphambi nangemva kwenqubo yokuwohloka usetshenziselwa ukubala i-COD noma i-BOD yesampula.

Ukulinganiswa kwe-COD kanye ne-BOD kuyizinkomba ezibalulekile zekhwalithi yamanzi futhi kuvame ukusetshenziselwa ukuqapha ukusebenza kahle kwezitshalo zokuhlanza amanzi amdaka kanye nezinye izinhlelo zokuhlanza amanzi. Ziphinde zisetshenziselwe ukuhlola umthelela ongaba khona wokukhipha amanzi amdaka emizimbeni yemvelo yamanzi, njengoba amazinga aphezulu ezinto eziphilayo emanzini anganciphisa okuqukethwe yi-oxygen emanzini futhi alimaze impilo yasemanzini.

I-CODG-3000 (Inguqulo engu-2.0) I-Industrial COD Analyzer1

I-CODG-3000 (Inguqulo engu-2.0) I-Industrial COD Analyzer2

I-BOD ne-COD kulinganiswa kanjani?

Kunezindlela eziningana ezingasetshenziswa ukukala i-BOD (Biological Oxygen Demand) kanye ne-COD (Chemical Oxygen Demand) emanzini. Nasi isifinyezo esifushane sezindlela ezimbili eziyinhloko:

Indlela yokuxuba: Endleleni yokuxuba, umthamo wamanzi owaziwayo uxutshwa nenani elithile lamanzi okuxuba, eliqukethe amazinga aphansi kakhulu ezinto eziphilayo. Isampula exutshwe ibe isifakwa esikhumbeni isikhathi esithile (ngokuvamile izinsuku ezi-5) ekushiseni okulawulwayo (ngokuvamile ama-20°C). Ukuhlushwa komoya-mpilo esibonelweni kulinganiswa ngaphambi nangemva kokuxuba. Umehluko ekuhlushweni komoya-mpilo ngaphambi nangemva kokuxuba usetshenziselwa ukubala i-BOD yesampula.

Ukuze kulinganiswe i-COD, kulandelwa inqubo efanayo, kodwa isampula iphathwa nge-chemical oxidizing agent (njenge-potassium dichromate) esikhundleni sokufuthwa. Ukuhlushwa komoya-mpilo okusetshenziswa ukusabela kwamakhemikhali kusetshenziselwa ukubala i-COD yesampula.

Indlela ye-Respirometer: Endleleni ye-respirometer, isitsha esivaliwe (esibizwa ngokuthi i-respirometer) sisetshenziselwa ukukala ukusetshenziswa kwe-oxygen kwama-microorganisms njengoba ephula izinto eziphilayo kusampula yamanzi. Ukuhlushwa kwe-oxygen ku-respirometer kulinganiswa esikhathini esithile (ngokuvamile izinsuku ezi-5) ekushiseni okulawulwayo (ngokuvamile ama-20°C). I-BOD yesampula ibalwa ngokusekelwe esilinganisweni lapho ukuhlushwa kwe-oxygen kwehla khona ngokuhamba kwesikhathi.

Kokubili indlela yokuxuba kanye nendlela ye-respirometer kuyizindlela ezijwayelekile ezisetshenziswa emhlabeni wonke ukukala i-BOD kanye ne-COD emanzini.

Uyini umkhawulo we-BOD kanye ne-COD?

I-BOD (Biological Oxygen Demand) kanye ne-COD (Chemical Oxygen Demand) ziyizilinganiso zenani lomoya-mpilo odingekayo ukuze kugaywe izinto eziphilayo emanzini. Amazinga e-BOD kanye ne-COD angasetshenziswa ukuhlola ikhwalithi yamanzi kanye nomthelela ongaba khona wokukhipha amanzi angcolile emizimbeni yemvelo yamanzi.

Imikhawulo ye-BOD kanye ne-COD yizindinganiso ezisetshenziswa ukulawula amazinga e-BOD kanye ne-COD emanzini. Le mikhawulo ivame ukubekwa yizikhungo ezilawulayo futhi isekelwe emazingeni amukelekayo ezinto eziphilayo emanzini angeke abe nomthelela omubi emvelweni. Imikhawulo ye-BOD kanye ne-COD ivame ukuvezwa ngama-milligram e-oxygen ngelitha lamanzi (mg/L).

Imikhawulo ye-BOD isetshenziselwa ukulawula inani lezinto eziphilayo emanzini angcolile akhishwa emanzini emvelo, njengemifula namachibi. Amazinga aphezulu e-BOD emanzini anganciphisa okuqukethwe yi-oxygen emanzini futhi alimaze impilo yasemanzini. Ngenxa yalokho, izitshalo zokuhlanza amanzi angcolile kudingeka zihlangabezane nemikhawulo ethile ye-BOD lapho zikhipha ukungcola kwazo.

Imikhawulo ye-COD isetshenziselwa ukulawula amazinga ezinto eziphilayo kanye nezinye izinto ezingcolisayo emanzini angcolile ezimboni. Amazinga aphezulu e-COD emanzini angabonisa ukuba khona kwezinto ezinobuthi noma eziyingozi, futhi anganciphisa nokuqukethwe komoya-mpilo emanzini futhi alimaze impilo yasemanzini. Izikhungo zezimboni ngokuvamile ziyadingeka ukuze zihlangabezane nemikhawulo ethile ye-COD lapho zikhipha amanzi azo angcolile.

Sekukonke, imikhawulo ye-BOD kanye ne-COD iyithuluzi elibalulekile lokuvikela imvelo nokuqinisekisa ikhwalithi yamanzi emizimbeni yemvelo yamanzi.

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Isikhathi sokuthunyelwe: Jan-04-2023