Chii chaunofanira kuteerera paunenge uchishandisa BOD5 mita?

Chii chaunofanira kutarisisa paunenge uchishandisa iyoBOD analyzer:
1. Kugadzirira usati waedza
1. Batidza magetsi ebiochemical incubator maawa masere chiyedzo chisati chaitwa, uye dzora tembiricha kuti ishande zvakanaka pa20°C.
2. Isa mvura yekuedza dilution, mvura inoculation uye inoculation dilution mvura muincubator uye uzvichengete pakupisa nguva dzose kuitira kushandiswa gare gare.
2. Mvura sampuli pretreatment
1. Apo pH kukosha kwemuenzaniso wemvura haisi pakati pe6.5 ne7.5; tanga waitisa bvunzo yakaparadzana kuti uone huwandu hunodiwa hwehydrochloric acid (5.10) kana sodium hydroxide solution (5.9), wobva waita neutralize sampu, zvisinei nekuti kune kunaya. Kana iyo acidity kana alkalinity yemuyedzo wemvura yakakwira zvakanyanya, yakakwira-concentration alkali kana asidhi inogona kushandiswa kune neutralization, kuve nechokwadi kuti chiyero hachisviki 0.5% yehuwandu hwesampu yemvura.
2. Pamienzaniso yemvura ine shoma shoma yeklorini yemahara, chlorine yemahara inozonyangarika mushure mekusiiwa kwemaawa 1-2. Kune masampuli emvura apo chlorine yemahara haigone kupera mukati menguva pfupi, huwandu hwakakodzera hwesodium sulfite solution inogona kuwedzerwa kubvisa chlorine yemahara.
3. Mienzaniso yemvura inounganidzwa kubva mumvura ine tembiricha yakaderera yemvura kana madhamu eutrophic inofanira kupiswa nekukurumidza kusvika pa20°C kuti ibudise kunze kweokisijeni yakanyungudika yakawanda mumvura. Kana zvisina kudaro, mhinduro dzekuongorora dzichave dzakaderera.
Paunenge uchitora sampuli kubva kumvura ine tembiricha yepamusoro yemvura kana marara ekuyerera kwemvura, inofanira kukurumidza kutonhodzwa kusvika pa20 ° C, zvikasadaro mhedzisiro yekuongorora ichave yakakwirira.
4. Kana sampu yemvura ichaongororwa isina ma microorganisms kana kusakwana kwe microbial basa, sampuli inofanira kuiswa inoculated. Zvakadai seanotevera marudzi emvura yetsvina yemaindasitiri:
a. Mvura yetsvina yemumaindasitiri iyo isati yagadziriswa biochemically;
b. Kupisa kwepamusoro uye kudzvinyirira kwakanyanya kana sterilized tsvina yemvura, kutarisisa kwakanyanya kunofanirwa kubhadharwa kune tsvina kubva kuindasitiri yekugadzira chikafu uye tsvina yemumba kubva kuzvipatara;
c. Yakasimba acidic uye alkaline maindasitiri tsvina yemvura;
d. Industrial wastewater ine high BOD5 kukosha;
e. Mvura yetsvina yemaindasitiri ine zvinhu zvine muchetura zvakaita semhangura, zingi, lead, arsenic, cadmium, chromium, cyanide, nezvimwe.
Iri pamusoro pemvura yetsvina yemaindasitiri inoda kurapwa nemamicroorganisms akakwana. Kunobva ma microorganisms ndeaya anotevera:
(1) Mushonga mukuru wetsvina yemumba isina kucheneswa yakaiswa pa20°C kwemaawa 24 kusvika ku36;
(2) Mvura yakawanikwa nekusefa sampuli kuburikidza nesefa bepa mushure mekunge bvunzo yapfuura yapera. Mvura iyi inogona kuchengetwa pa20 ℃ kwemwedzi mumwechete;
(3) Mvura inobva mumapombi ekuchenesa tsvina;
(4) Mvura yenzizi kana yedhamu ine tsvina yemudhorobha;
(5) Mhando dzebhakitiriya dzakapihwa nechiridzwa. Kuyera 0.2g yehutachiwana hwebhakitiriya, uidururire mu 100ml yemvura yakachena, funganya nguva dzose kusvikira mapundu akapararira, uise mu incubator pa 20 ° C uye rega imire kwemaawa 24-48, wozotora supernatant.