Menene Buƙatar Oxygen Oxygen (BOD)?
Buƙatar Oxygen Oxygen (BOD) Hakanan aka sani da buƙatar oxygen biochemical. Yana da cikakkiyar ma'auni mai nuna abun ciki na abubuwan da ke buƙatar iskar oxygen kamar mahaɗan kwayoyin halitta a cikin ruwa. Lokacin da kwayoyin halitta da ke cikin ruwa ke hulɗa da iska, ƙwayoyin cuta na aerobic suna rushe shi, kuma adadin iskar oxygen da ake bukata don sanya shi inorganic ko gasified ana kiransa biochemical oxygen demand, wanda aka bayyana a ppm ko mg/L. Mafi girman darajar, mafi yawan gurɓataccen yanayi a cikin ruwa kuma mafi tsanani gurbatawa. A haƙiƙa, lokacin da za a bazuwar kwayoyin halitta gaba ɗaya ya bambanta da nau'insa da yawansa, nau'in da adadin ƙwayoyin cuta, da yanayin ruwa. Sau da yawa yana ɗaukar kwanaki goma ko ɗaruruwan kwanaki don gaba ɗaya oxidize da bazuwa. Bugu da ƙari, Wani lokaci saboda tasirin ƙarfe mai nauyi da abubuwa masu guba a cikin ruwa, ayyukan ƙwayoyin cuta suna hanawa har ma da kashe su. Don haka, yana da wahala a auna BOD daidai. Don rage lokacin, buƙatar iskar oxygen ta kwana biyar (BOD5) gabaɗaya ana amfani da ita azaman ƙayyadaddun ƙayyadaddun ƙididdiga na ƙwayoyin cuta a cikin ruwa. BOD5 yana kusan daidai da 70% na yawan iskar oxygen don cikakken bazuwar oxidative. Gabaɗaya magana, koguna masu BOD5 ƙasa da 4pm ana iya cewa ba su da gurɓata yanayi.
Yadda za a gwada buƙatun oxygen na Biochemical?
Kayan aikin gano BOD mai sauƙin aiki yana da matukar mahimmanci don gano ingancin ruwa. Na'urar BOD5 ta Lianhua tana amfani da hanyar matsa lamba daban-daban (manometric) mara mercury, wanda zai iya gwada ruwa mai ɗauke da ƙwayoyin cuta ba tare da ƙara abubuwan sinadarai ba, kuma ana iya buga sakamakon ta atomatik. Jagoran fasaha na haƙƙin mallaka.
Menene Buƙatar Oxygen Chemical (COD)?
Bukatar iskar oxygen (COD) shine adadin iskar oxygen da ake buƙata don oxidize gurɓataccen yanayi da wasu rage abubuwa a cikin ruwa ƙarƙashin wasu yanayi tare da wakili mai oxidizing (kamar potassium dichromate ko potassium permanganate), wanda aka bayyana a cikin milligrams na oxygen cinye kowace lita na samfurin ruwa. lamba ce. COD muhimmiyar alama ce da aka saba amfani da ita don kimanta ingancin ruwa. Chemical oxygen bukatar yana da halaye na sauki da sauri ƙaddara hanya. Potassium chromate, wani wakili na oxidizing, na iya gaba daya oxidize kwayoyin abubuwa a cikin ruwa, kuma yana iya oxidize sauran abubuwa masu ragewa. Potassium permanganate mai oxidant na iya kawai oxidize kusan kashi 60% na abubuwan halitta. Babu ɗayan waɗannan hanyoyin guda biyu da za su iya nuna ainihin halin da ake ciki na lalata gurɓataccen gurɓataccen ruwa a cikin ruwa, saboda babu ɗayansu ya bayyana adadin kwayoyin halitta waɗanda ƙananan ƙwayoyin cuta za su iya oxidize. Sabili da haka, ana amfani da buƙatar oxygen na biochemical sau da yawa a cikin nazarin ingancin ruwa wanda kwayoyin halitta suka gurɓata.
A halin yanzu, gano COD ya zama ruwan dare gama gari a cikin ruwa, kuma masana'antu, masana'antar najasa, gundumomi, koguna da sauran masana'antu suna buƙata. Fasahar gano COD ta Lianhua na iya samun ingantaccen sakamako cikin sauri cikin mintuna 20 kuma ana amfani da ita sosai.
Lokacin aikawa: Afrilu-27-2023
