Ndi chiyaniCOD BOD analyzer?
COD (Chemical Oxygen Demand) ndi BOD (Biological Oxygen Demand) ndi miyeso iwiri ya kuchuluka kwa okosijeni wofunikira kuti awononge zinthu zamoyo m'madzi.COD ndi muyeso wa mpweya wofunikira kuti uwononge zinthu zamoyo, pamene BOD ndi muyeso wa mpweya wofunikira kuti uwononge zinthu zamoyo pogwiritsa ntchito tizilombo toyambitsa matenda.
COD/BOD analyzer ndi chida chomwe chimagwiritsidwa ntchito kuyeza COD ndi BOD ya madzi.Ma analyzer amenewa amagwira ntchito poyesa kuchuluka kwa okosijeni m’madzi a m’madzi asanalole kuti zinthu zamoyo ziwonongeke.Kusiyana kwa mpweya wa okosijeni isanayambe komanso itatha kusweka kumagwiritsidwa ntchito kuwerengera COD kapena BOD ya chitsanzo.
Miyezo ya COD ndi BOD ndizizindikiro zofunika za madzi abwino ndipo nthawi zambiri amagwiritsidwa ntchito poyang'anira momwe malo opangira madzi akuwonongeka komanso njira zina zopangira madzi.Amagwiritsidwanso ntchito powunika momwe kutaya madzi onyansa m'madzi achilengedwe kungakhudzire, chifukwa kuchuluka kwa zinthu zamoyo m'madzi kumatha kuchepetsa mpweya wamadzi m'madzi ndikuwononga zamoyo zam'madzi.
Kodi BOD ndi COD zimayesedwa bwanji?
Pali njira zingapo zomwe zingagwiritsidwe ntchito kuyeza BOD (Biological Oxygen Demand) ndi COD (Chemical Oxygen Demand) m'madzi.Nazi mwachidule njira ziwiri zazikuluzikulu:
Njira yochepetsera: Mu njira yochepetsera, madzi odziwika amasungunuka ndi madzi enaake osungunuka, omwe amakhala ndi zinthu zochepa kwambiri za organic.Chitsanzo chochepetsedwacho chimayikidwa kwa nthawi yeniyeni (nthawi zambiri masiku 5) pa kutentha kolamulidwa (nthawi zambiri 20 ° C).Kuchuluka kwa okosijeni m'chitsanzocho kumayesedwa isanayambe kapena itatha kukulitsidwa.Kusiyana kwa ndende ya okosijeni isanayambe komanso itatha kukulitsidwa kumagwiritsidwa ntchito powerengera BOD ya chitsanzo.
Kuyeza COD, njira yofananira imatsatiridwa, koma chitsanzocho chimagwiritsidwa ntchito ndi mankhwala oxidizing agent (monga potassium dichromate) m'malo moyikidwa.Kuchuluka kwa okosijeni wogwiritsidwa ntchito ndi mankhwala kumagwiritsidwa ntchito powerengera COD ya chitsanzo.
Njira ya Respirometer: Mu njira ya respirometer, chidebe chosindikizidwa (chotchedwa respirometer) chimagwiritsidwa ntchito poyesa kugwiritsira ntchito mpweya wa tizilombo toyambitsa matenda pamene akuphwanya zinthu zamoyo m'madzi.Mpweya wa okosijeni mu respirometer umayesedwa pa nthawi yeniyeni (nthawi zambiri masiku 5) pa kutentha kolamulidwa (nthawi zambiri 20 ° C).BOD yachitsanzocho imawerengedwa kutengera mlingo womwe mpweya wa okosijeni umachepa pakapita nthawi.
Njira ya dilution ndi respirometer ndi njira zovomerezeka zomwe zimagwiritsidwa ntchito padziko lonse kuyesa BOD ndi COD m'madzi.
Kodi malire a BOD ndi COD ndi chiyani?
BOD (Biological Oxygen Demand) ndi COD (Chemical Oxygen Demand) ndi miyeso ya kuchuluka kwa mpweya wofunikira kuti uwononge zinthu zamoyo m'madzi.Miyezo ya BOD ndi COD ingagwiritsidwe ntchito kuwunika momwe madzi alili komanso momwe angakhudzire kutaya madzi oipa m'madzi achilengedwe.
Malire a BOD ndi COD ndi miyezo yomwe imagwiritsidwa ntchito poyang'anira kuchuluka kwa BOD ndi COD m'madzi.Malirewa nthawi zambiri amaikidwa ndi mabungwe olamulira ndipo amachokera ku milingo yovomerezeka ya zinthu zamoyo m'madzi zomwe sizidzasokoneza chilengedwe.Malire a BOD ndi COD amawonetsedwa mu ma milligrams a oxygen pa lita imodzi yamadzi (mg/L).
Malire a BOD amagwiritsidwa ntchito poyang'anira kuchuluka kwa zinthu zachilengedwe m'madzi onyansa omwe amatulutsidwa m'madzi achilengedwe, monga mitsinje ndi nyanja.Kuchuluka kwa BOD m'madzi kumatha kuchepetsa mpweya wamadzi m'madzi ndikuwononga zamoyo zam'madzi.Zotsatira zake, malo opangira madzi oyipa amafunikira kuti akwaniritse malire enieni a BOD potulutsa utsi wawo.
Malire a COD amagwiritsidwa ntchito kuwongolera kuchuluka kwa zinthu zachilengedwe ndi zoipitsa zina m'madzi otayira m'mafakitale.Kuchuluka kwa COD m’madzi kungasonyeze kukhalapo kwa zinthu zapoizoni kapena zovulaza, ndipo kungachepetsenso mpweya wa m’madzi ndi kuvulaza zamoyo za m’madzi.Mafakitale nthawi zambiri amafunikira kuti akwaniritse malire ake a COD akamathira madzi oipa.
Ponseponse, malire a BOD ndi COD ndi zida zofunika zotetezera chilengedwe ndikuwonetsetsa kuti madzi ali bwino m'madzi achilengedwe.
Nthawi yotumiza: Jan-04-2023
