Nhau - COD neBOD zviyero zvakaenzana here?

Zviyero zveCOD neBOD zvakaenzana here?

Kwete, COD neBOD haisi pfungwa imwe chete; zvisinei, vane ukama hwapedyo.
Ose ari maviri maparamita akakosha anoshandiswa kuongorora kuwanda kwezvinosvibisa zvipenyu mumvura, kunyangwe zvichisiyana maererano nechiyero chekuyera uye chiyero.

Izvi zvinotevera zvinopa tsananguro yakadzama yekusiyana kwavo uye hukama:

1. Chemical Oxygen Demand (COD)

Tsanangudzo: COD inoreva kuwanda kweokisijeni inodiwa kuisa mumakemikari zvinhu zvese zviri mumvura uchishandisa mushonga wakasimba weoxidizing, kazhinji potassium dichromate, pasi pemamiriro easidhi yakasimba. Inoratidzwa mumamirigiramu eokisijeni parita (mg/L).
· Nheyo: Chemical oxidation. Organic zvinhu zvinonyatso oxidized kuburikidza nemakemikari reagents pasi pepamusoro-tembiricha mamiriro (anenge maawa maviri).
Zvinhu zvakayerwa: COD inoyera angangoita ese organic komisheni, kusanganisira ese ari maviri biodegradable uye asiri-biodegradable zvinhu.

Hunhu:
Kuyerwa nekukasira: Mibairo inogona kuwanikwa mukati meawa 2–3.
· Kuyera kuyerwa kwakakura: Huwandu hweCOD hunowanzo pfuura huwandu hweBOD nekuti iyo nzira inoverengera kune ese makemikari oxidizable zvinhu.
· Kushaya hunhu: COD haikwanise kusiyanisa pakati pezvinhu zvipenyu nezvisingaparadzike.

2.Biochemical Oxygen Demand (BOD)

Tsanangudzo: BOD inoreva kuwanda kweokisijeni yakanyungudika inopedzwa netupukanana panguva yekuora kweiyo biodegradable organic zvinhu mumvura pasi pemamiriro chaiwo (kazhinji 20 °C kwemazuva mashanu, inotaridzwa seBOD₅). Inoratidzwawo mumamirigiramu parita (mg/L).
· Musimboti: Biological oxidation. Kushatiswa kweiyo organic matter ne aerobic microorganisms inotevedzera echisikigo yekuzvichenura maitiro anoitika mumiviri yemvura.
Zvinhu zvakayerwa: BOD inoyera chete chidimbu cheorganic matter chinogona kuparadzwa.

Hunhu:
· Yakareba nguva yekuyera: Iyo yakajairwa bvunzo yenguva mazuva mashanu (BOD₅).
· Inoratidza mamiriro echisikigo: Inopa nzwisiso mune chaiyo yekushandisa oxygen kugona kweiyo organic nharaunda munzvimbo dzechisikigo.
· Hunhu hwepamusoro: BOD inopindura chete kune biodegradable organic zvinhu.

3. Kubatana uye Kunoshanda Zvikumbiro

Pasinei nekusiyana kwavo, COD neBOD zvinowanzoongororwa pamwechete uye kuita basa rakakosha mukuongorora kwemhando yemvura uye kurapwa kwemvura yetsvina:

1) Kuongorora biodegradability:
Iyo BOD/COD reshiyo inowanzoshandiswa kuongorora kugona kwebiological kurapwa nzira (semuenzaniso, activated sludge process).
· BOD/COD > 0.3: Inoratidza kunaka kwebiodegradability, zvichiratidza kuti kurapwa kwebiological kwakakodzera.
· BOD/COD < 0.3: Inoratidza chikamu chepamusoro chezve refractory organic matter uye kuderera kwe biodegradability. Mumamiriro ezvinhu akadaro, nzira dzekutanga dzekurapa (semuenzaniso, advanced oxidation kana coagulation sedimentation) inogona kudikanwa kuwedzera biodegradability, kana dzimwe nzira dzekurapa-kemikari yemuviri dzingadikanwa.

2) Maitiro ekushandisa:
BOD: Inonyanya kushandiswa kuongorora maitiro ezvakatipoteredza ekuyerera kwemvura yetsvina pamitumbi yemvura chaiyo, kunyanya maererano nekuderera kweokisijeni uye kugona kwayo kukonzera kufa kwehupenyu hwemvura.
· COD: Inoshandiswa zvakanyanya kukurumidza kutarisa kusvibiswa kwemvura yemaindasitiri, kunyanya kana mvura yetsvina iine chepfu kana kuti isiri-biodegradable zvinhu. Nekuda kwekukurumidza kuyera kugona kwayo, COD inowanzo shandirwa chaiyo-nguva yekutarisa uye kudzora maitiro mumasisitimu ekuchenesa mvura.

Pfupiso yeCore Differences

Hunhu	COD (Chemical Oxygen Demand)	BOD (Biochemical Oxygen Demand)
Principle	Kemikari oxidation	Biological oxidation (microbial chiitiko)
Oxidant	Chakasimba chemakemikari oxidants (semuenzaniso, potassium dichromate)	Aerobic microorganisms
Chiyero chekuyera	Inosanganisira ese makemikari oxidizable organic zvinhu (kusanganisira isiri-biodegradable)	Chete biodegradable organic matter
Nguva yekuedza	Pfupi (maawa 2–3)	Yakareba (mazuva mashanu kana kupfuura)
Nhamba yehukama	COD ≥ BOD	BOD ≤ COD

Mhedziso:

COD neBOD zviratidzo zvinopindirana zvekuongorora kusvibiswa kwemvura mumvura kwete zviyero zvakaenzana. COD inogona kutariswa se "theoretical yakanyanya kudiwa okisijeni" yezvese organic zvinhu zviripo, nepo BOD inoratidza "chaiyo yekushandisa oxygen kugona" pasi pemamiriro echisikigo.

Kunzwisisa mutsauko uye hukama pakati peCOD neBOD kwakakosha pakugadzira nzira dzinoshanda dzekuchenesa mvura yetsvina, kuongorora mhando yemvura, uye kumisikidza miitiro yakakodzera yekuburitsa.

TP TN CODMn Nitrate nitrogen COD BOD Ammonia nitrogen analyzer

Shanghai Boqu Instrument Co., Ltd. inonyanya kupa huwandu hwakakwana hwemhando yepamusoro yeCOD uye BOD yepamhepo yemhando yemvura analyzer. Yedu yehungwaru yekuongorora zviridzwa inogonesa chaiyo-nguva uye kwakaringana kutarisa, otomatiki data kutapurirana, uye gore-yakavakirwa manejimendi, nekudaro kufambisa kugadzika kwakanaka kweiyo kure uye nehungwaru yekutarisa mvura system.

Nyora meseji yako pano ugotitumira

Nguva yekutumira: Sep-10-2025