Funda ngomhloli osheshayo we-BOD

I-BOD (i-Biochemical Oxygen Demand), ngokusho kwencazelo evamile kazwelonke, i-BOD ibhekisela kumakhemikhali ezinto eziphilayo.
Ukufuna komoya-mpilo kubhekisela kumoya-mpilo oncibilikisiwe osetshenziswa amagciwane kuyinqubo ye-biochemical Chemical yokubola ezinye izinto ezifakwa oxidizable emanzini ngaphansi kwezimo ezithile.
Umthelela we-BOD: Indle yasekhaya kanye namanzi angcolile ezimbonini aqukethe inani elikhulu lezinto ezihlukahlukene eziphilayo. Lapho lezi zinto eziphilayo zibola emanzini ngemva kokungcolisa amanzi, zisebenzisa inani elikhulu le-oxygen encibilikisiwe, ngaleyo ndlela ziphazamise ukulingana komoya-mpilo emanzini, ziwohloke izinga lamanzi, futhi zibangele ukufa kwezinhlanzi nezinye izinto eziphilayo zasemanzini ngenxa ye-hypoxia. . Izinhlanganisela eziphilayo eziqukethwe emanzini ziyinkimbinkimbi futhi kunzima ukunquma ingxenye ngayinye. Abantu bavame ukusebenzisa umoya-mpilo osetshenziswa izinto eziphilayo emanzini ngaphansi kwezimo ezithile ukuze baveze ngokungaqondile okuqukethwe kwezinto eziphilayo emanzini, futhi isidingo somoya-mpilo we-Biochemical singenye yezinkomba ezibalulekile. Iphinde ikhombise ukubola kwezinto eziphilayo emanzini angcolile.
Iyini i-BOD5: (BOD5) ibhekisela enanini le-oxygen encibilikisiwe esetshenziswa lapho isampula ifakwe endaweni emnyama (20 ± 1) ℃ izinsuku ezingu-5 ± 4 amahora.
I-Microbial electrode iyinzwa ehlanganisa ubuchwepheshe be-microbial nobuchwepheshe bokutholwa kwe-electrochemical. Ikakhulukazi iqukethe i-electrode ye-oxygen encibilikisiwe kanye nefilimu ye-microbial immobilized enamathiselwe ngokuqinile endaweni yayo yokuphefumula. Umgomo wokuphendula izinto ze-BOD ukuthi uma ifakwa endaweni engaphansi engenazo izinto ze-B0D ezingeni lokushisa elingaguquki kanye nokugcwala komoyampilo okuncibilikisiwe, ngenxa yomsebenzi othile wokuphefumula wama-microorganisms, ama-molecule e-oksijini ancibilikisiwe ku-substrate asakazekela ku-electrode oxygen ngokusebenzisa. i-membrane ye-microbial ngezinga elithile, futhi i-electrode ye-microbial ikhipha amandla amanje; Uma into ye-BOD yengezwa esixazululweni esingezansi, i-molecule yento izosakazeka kulwelwesi lwe-microbial kanye ne-molecule ye-oxygen. Ngenxa yokuthi i-microorganism kulwelwesi izokwenza i-Anabolism into ye-BOD futhi idle umoya-mpilo, i-molecule ye-oksijini engena ku-electrode yomoya-mpilo izoncishiswa, okungukuthi, izinga lokusabalalisa lizoncishiswa, amandla okukhipha i-electrode azoncishiswa, futhi azokwehla. kunani elisha eliqinile phakathi kwamaminithi ambalwa. Phakathi kwebanga elifanele lokugxilisa ingqondo kwe-BOD, kukhona ubudlelwano bomugqa phakathi kokuncipha kokuphumayo kwe-electrode yamanje kanye nokugxiliswa kwe-BOD, kuyilapho kukhona ubudlelwano bobuningi phakathi kokugxilisa ingqondo kwe-BOD nevelu ye-BOD. Ngakho-ke, ngokusekelwe ekunciphiseni kwamanje, i-BOD yesampula yamanzi ahloliwe inganqunywa.
I-LH-BODK81 I-Biological Chemical Oxygen ifuna inzwa ye-BOD microbial tester esheshayo, uma kuqhathaniswa nezindlela zokulinganisa ze-BOD zendabuko, lolu hlobo olusha lwenzwa yokubona lunezinzuzo eziningi. Okokuqala, izindlela zokulinganisa ze-BOD zendabuko zidinga inqubo ende yokulima, ngokuvamile ethatha izinsuku ezingu-5-7, kuyilapho izinzwa ezintsha zithatha imizuzu embalwa kuphela ukuqedela isilinganiso. Okwesibili, izindlela zokulinganisa zendabuko zidinga inani elikhulu lama-reagents amakhemikhali namathuluzi engilazi, kuyilapho izinzwa ezintsha zingadingi noma yimaphi ama-reagents noma amathuluzi, ukunciphisa izindleko zokuhlola kanye nokutshalwa kwezimali kwabasebenzi. Ukwengeza, izindlela zokulinganisa ze-BOD zendabuko ziyakwazi ukubhekana nezimo zemvelo ezifana nezinga lokushisa nokukhanya, kuyilapho izinzwa ezintsha zingakala ezindaweni ezihlukahlukene futhi ziphendule ngokushesha izinguquko.
Ngakho-ke, lolu hlobo olusha lwenzwa ye-optical lunamathemba okusebenza abanzi. Ngaphezu kokusetshenziswa emkhakheni wokuqapha izinga lamanzi, le nzwa ingasetshenziswa futhi emikhakheni ehlukahlukene efana nokudla, imithi, ukuvikelwa kwemvelo, nokutholwa kwezinto eziphilayo ekufundiseni elabhorethri.