YiniI-COD BOD analyzer?
I-COD (Chemical Oxygen Demand) kanye ne-BOD (Biological Oxygen Demand) yizilinganiso ezimbili zenani lomoya-mpilo odingekayo ukuze kuhlinzekwe izinto eziphilayo emanzini.I-COD isilinganiso somoya-mpilo odingekayo ukuze kuhlinzekwe izinto eziphilayo ngamakhemikhali, kuyilapho i-BOD iyisilinganiso somoya-mpilo odingekayo ukuze kuhlakazwe izinto eziphilayo ngokwezinto eziphilayo, kusetshenziswa ama-microorganisms.
I-COD/BOD analyzer iyithuluzi elisetshenziswa ukukala i-COD ne-BOD yesampula yamanzi.Lezi zihlaziyi zisebenza ngokulinganisa ukugcwala komoyampilo kusampula yamanzi ngaphambi nangemva kokuba izinto eziphilayo sezivunyelwe ukuba ziqhekeke.Umehluko ekugxilweni komoyampilo ngaphambi nangemuva kwenqubo yokuhlukaniswa usetshenziselwa ukubala i-COD noma i-BOD yesampula.
Izilinganiso ze-COD ne-BOD ziyizinkomba ezibalulekile zekhwalithi yamanzi futhi zivame ukusetshenziselwa ukuqapha ukusebenza kahle kwezitshalo zokuhlanza amanzi angcolile nezinye izinhlelo zokuhlanza amanzi.Zibuye zisetshenziselwe ukuhlola umthelela ongaba khona wokukhipha amanzi angcolile emizimbeni yemvelo yamanzi, njengoba amazinga aphezulu ezinto eziphilayo emanzini anganciphisa okuqukethwe komoyampilo emanzini futhi alimaze impilo yasemanzini.
Ikalwa kanjani i-BOD ne-COD?
Kunezindlela ezimbalwa ezingasetshenziswa ukukala iBOD (Biological Oxygen Demand) kanye neCOD (Chemical Oxygen Demand) emanzini.Nasi isifinyezo esifushane sezindlela ezimbili eziyinhloko:
Indlela yokuhlanjululwa: Ngendlela yokuhlanjululwa, umthamo owaziwayo wamanzi uhlanjululwa ngenani elithile lamanzi ahlanjululwayo, aqukethe amazinga aphansi kakhulu ezinto eziphilayo.Isampula elihlanjululiwe libe selifakwa isikhathi esithile (imvamisa izinsuku ezi-5) ezingeni lokushisa elilawulwayo (ngokuvamile lingama-20°C).Ukugcwala komoyampilo kusampula kukalwa ngaphambi nangemva kokufukamela.Umehluko ekugxilweni komoyampilo ngaphambi nangemva kokufukamela usetshenziselwa ukubala i-BOD yesampula.
Ukukala i-COD, kulandelwa inqubo efanayo, kodwa isampula iphathwa nge-chemical oxidizing agent (efana ne-potassium dichromate) esikhundleni sokufukanyelwa.Ukuhlangana komoyampilo osetshenziswa ukusabela kwamakhemikhali kusetshenziselwa ukubala i-COD yesampula.
Indlela ye-Respirometer: Ngendlela ye-respirometer, isitsha esivaliwe (okuthiwa i-respirometer) sisetshenziselwa ukukala ukusetshenziswa kwe-oxygen yama-microorganisms njengoba ephula izinto eziphilayo kusampula yamanzi.Ukuhlushwa komoya-mpilo ku-respirometer kukalwa ngesikhathi esithile (ngokuvamile izinsuku ezingu-5) ekushiseni okulawulwayo (ngokuvamile ku-20 ° C).I-BOD yesampula ibalwa ngokususelwe esilinganisweni lapho ukugxiliswa komoyampilo kwehla khona ngokuhamba kwesikhathi.
Kokubili indlela yokuhlanjululwa kanye nendlela ye-respirometer izindlela ezijwayelekile ezisetshenziswa emhlabeni wonke ukukala i-BOD ne-COD emanzini.
Uyini umkhawulo we-BOD ne-COD?
I-BOD (i-Biological Oxygen Demand) kanye ne-COD (Chemical Oxygen Demand) yizilinganiso zenani lomoya-mpilo odingekayo ukuze kuhlinzekwe izinto eziphilayo emanzini.Amazinga e-BOD kanye ne-COD angasetshenziswa ukuhlola ikhwalithi yamanzi kanye nomthelela ongaba khona wokukhipha amanzi angcolile ezindaweni zemvelo zamanzi.
Imikhawulo ye-BOD ne-COD ingamazinga asetshenziselwa ukulawula amazinga e-BOD ne-COD emanzini.Le mikhawulo ivamise ukubekwa ama-ejensi alawulayo futhi isekelwe emazingeni amukelekayo ezinto eziphilayo emanzini angeke abe nomthelela omubi emvelweni.Imikhawulo ye-BOD ne-COD ivamise ukuvezwa ngamamiligremu omoya-mpilo ilitha ngalinye lamanzi (mg/L).
Imikhawulo ye-BOD isetshenziselwa ukulawula inani lezinto eziphilayo emanzini angcolile akhishelwa emanzini emvelo, njengemifula namachibi.Amazinga aphezulu e-BOD emanzini anganciphisa izinga le-oxygen emanzini futhi alimaze impilo yasemanzini.Ngenxa yalokho, izitshalo zokuhlanza amanzi angcolile zidingeka ukuthi zihlangabezane nemikhawulo ethile ye-BOD lapho zikhipha ukungcola kwazo.
Imikhawulo ye-COD isetshenziselwa ukulawula amazinga ezinto eziphilayo nokunye ukungcola emanzini angcolile ezimbonini.Amazinga aphezulu e-COD emanzini angabonisa ukuba khona kwezinto ezinobuthi noma eziyingozi, futhi anganciphisa okuqukethwe komoyampilo emanzini futhi alimaze ukuphila kwasemanzini.Izikhungo zezimboni ngokuvamile zidingeka ukuthi zihlangabezane nemikhawulo ethile ye-COD lapho zikhipha amanzi azo angcolile.
Sekukonke, imikhawulo ye-BOD ne-COD ingamathuluzi abalulekile okuvikela imvelo nokuqinisekisa ikhwalithi yamanzi emizimbeni yemvelo yamanzi.
Isikhathi sokuthumela: Jan-04-2023
