Kudiwa kwemakemikari okisijeni, inozivikanwawo semakemikari okisijeni kushandiswa, kana COD kwenguva pfupi, inoshandisa kemikari oxidants (yakadai sepotassium dichromate) kuokisisa uye kuodza zvinhu zvinogoneka (senge organic matter, nitrite, ferrous salts, sulfides, etc.) mumvura, uyezve kushandiswa kweOkisijeni kunoverengerwa zvichienderana nehuwandu hweasara oxidant.Kufanana ne biochemical oxygen kudiwa (BOD), chiratidzo chakakosha chechiyero chekusvibiswa kwemvura.Iyo unit yeCOD ndeye ppm kana mg/L.Iko kudiki kukosha, kuderera kwechiyero chekusvibiswa kwemvura.Muchidzidzo chekusvibiswa kwenzizi uye maindasitiri emvura yetsvina, pamwe nekushanda uye manejimendi ekuchenesa mvura yetsvina, chinhu chakakosha uye nekukurumidza kuyerwa COD kusvibiswa parameter.
Chemical okisijeni kudiwa (COD) inowanzo shandiswa sechiratidzo chakakosha kuyera zviri mukati meiyo organic matter mumvura.Iyo yakakura iyo kemikari yeokisijeni inodiwa, iyo yakanyanya kukomba iyo muviri wemvura unosvibiswa neorganic zvinhu.Pakuyera kudiwa kwemakemikari okisijeni (COD), zviyero zvakayerwa zvinosiyana zvichienderana nekudzikisa zvinhu mumuenzaniso wemvura uye nzira dzekuyera.Nzira dzinonyanya kushandiswa dzekutsunga pari zvino iacidic potassium permanganate oxidation nzira uye potassium dichromate oxidation nzira.
Organic nyaya inokuvadza zvakanyanya kumaindasitiri emvura masisitimu.Kunyatsotaura, kudiwa kwemakemikari okisijeni kunosanganisirawo inorganic kuderedza zvinhu zviripo mumvura.Kazhinji, sezvo huwandu hwezvinhu zvipenyu mumvura yetsvina hwakakura kupfuura huwandu hwezvinhu zvisingaoneki, kemikari yeokisijeni inodiwa inowanzo shandiswa kumiririra huwandu hwese hwezvinhu zvakasimukira mumvura yetsvina.Pasi pemamiriro ekuyera, organic matter iyo isina nitrogen mumvura inogadziriswa nyore nyore ne potassium permanganate, nepo organic matter ine nitrogen yakanyanya kuoma kuora.Naizvozvo, kushandiswa kweokisijeni kwakakodzera kuyera mvura yechisikigo kana mvura yakaraswa yakajairika ine nyore oxidized organic zvinhu, nepo organic maindasitiri emarara ane zvimwe zvakaomarara anowanzo shandiswa kuyera kemikari kudiwa kweokisijeni.
Kukanganisa kweCOD pamasisitimu ekurapa mvura
Kana mvura ine huwandu hwakakura hwezvinhu zvakasikwa ikapfuura nepakati peiyo desalination system, inosvibisa iyo ion exchange resin.Pakati pavo, zvakanyanya nyore kusvibisa anion exchange resin, nekudaro kuderedza resin exchange resin.Organic matter inogona kudzikiswa ne50% panguva yepretreatment (coagulation, clarification and filtration), asi organic matter haigone kubviswa zvine mutsindo mu desalination system.Naizvozvo, mvura yekugadzira-up inowanzounzwa mubhailer kuti ideredze pH kukosha kweiyo boiler mvura., zvichikonzera kuora kwehurongwa;dzimwe nguva organic zvinhu zvinogona kuunzwa muutsi system uye condensate mvura, kuderedza pH kukosha, izvo zvinogona zvakare kukonzera system corrosion.
Pamusoro pezvo, yakawandisa organic zvinhu zviri mumhepo inotenderera inosimudzira kuberekana kwehutachiona.Naizvozvo, zvisinei nekubvisa munyu, boiler mvura kana kutenderera kwemvura masisitimu, iyo yakadzika COD, zviri nani, asi parizvino hapana yakabatana nhamba index.
Cherechedza: Mukutenderera kwemvura inotonhorera, kana COD (KMnO4 nzira) iri> 5mg / L, hutano hwemvura hwakatanga kuipa.
Kukanganisa kweCOD pane ecology
High COD yemukati zvinoreva kuti mvura ine huwandu hukuru hwekudzikisa zvinhu, zvikuru zvinosvibisa organic.Iyo COD yakakwira, ndiko kunowedzera kusvibiswa kweorganic mumvura yerwizi.Kunobva kusvibiswa kwezvinhu izvi kunowanzova mishonga yezvipembenene, makemikari emiti, organic fetereza, nezvimwewo. Kana zvikasarapwa nenguva, zvinosvibisa zvakawanda zveorganic zvinogona kuvharidzirwa nevhu riri pazasi perwizi ndokuiswa, zvichikonzera chepfu isingaperi kuupenyu hwemumvura mune mashoma anotevera. makore.
Mushure mekunge huwandu hukuru hwehupenyu hwemumvura hwafa, zvipenyu zviri murwizi zvichaparadzwa zvishoma nezvishoma.Kana vanhu vakadya zvipenyu zvakadaro mumvura, vanotora huwandu hwakawanda hwehupfu kubva kune zvipenyu izvi uye vozviunganidza mumuviri.Iyi chepfu inowanzova carcinogenic, deformational, uye mutagenic, uye inonyanya kukanganisa hutano hwevanhu.Pamusoro pezvo, kana mvura yemurwizi yakasvibiswa ikashandiswa pakudiridzira, zvirimwa nembesa zvinokanganiswawo uye zvinokura zvisina kunaka.Izvi zvirimwa zvakasvibiswa hazvigoni kudyiwa nevanhu.
Zvisinei, kudiwa kwekemikari yepamusoro yeokisijeni hazvirevi kuti pachava nenjodzi dzataurwa pamusoro apa, uye mhedziso yekupedzisira inogona kuwanikwa chete kuburikidza nekuongorora kwakadzama.Semuyenzaniso, ongorora mhando dzeorganic matter, izvi zvinokonzeresa sei pamhando yemvura uye ecology, uye kana zvichikuvadza muviri wemunhu.Kana kuongororwa kwakadzama kusingagoneke, unogona zvakare kuyera kemikari okisijeni kudiwa kwesamu yemvura zvakare mushure memazuva mashoma.Kana kukosha kwacho kudonha zvakanyanya kana zvichienzaniswa neukoshi hwekare, zvinoreva kuti zvinhu zvinodzikisa zviri mumvura zvinonyanya kuparara nyore nyore.organic zvinhu zvakadaro zvinokuvadza kumuviri wemunhu uye Biological njodzi idiki.
Nzira dzakajairika dzekushatisa mvura yetsvina yeCOD
Parizvino, adsorption method, chemical coagulation method, electrochemical method, ozone oxidation method, biological method, micro-electrolysis, etc. inzira dzakajairika dzeCOD tsvina yemvura.
COD yekuona nzira
Rapid digestion spectrophotometry, iyo COD yekuona nzira yeLianhua Company, inogona kuwana chaiyo mibairo yeCOD mushure mekuwedzera reagents uye kugaya sampuli pa165 madhigirii kwemaminitsi gumi.Zviri nyore kushandisa, ine yakaderera reagent dosage, yakaderera kusvibiswa, uye yakaderera simba kushandiswa.
Nguva yekutumira: Feb-22-2024
