Biochemical oxygen xav tau (BOD) sawv cev tus nqi oxygen noj los ntawm cov kab mob thiab lwm yam kab mob thaum lawv decompose organic teeb meem nyob rau hauv aerobic (oxygen tam sim no) cov xwm txheej ntawm qhov ntsuas kub. … Qhov lwj ntawm cov organic teeb meem hauv dej yog ntsuas raws li biochemical lossis tshuaj oxygen xav tau.
Yuav ua li cas yog qhov zoo ntawm cov pa oxygen xav tau?
A BOD qib ntawm 1-2 ppm yog suav tias zoo heev. Yuav tsis muaj ntau cov organic pov tseg tam sim no hauv cov dej. Cov dej uas muaj BOD qib ntawm 3-5 ppm yog suav tias yog huv si.
Ib co piv txwv ntawm biochemical oxygen thov?
Qhov chaw ntawm biochemical oxygen xav tau suav nrog topsoil, nplooj thiab cov khib nyiab ntoo; tsiaj quav; cov khoom siv hluav taws xob los ntawm cov ntaub ntawv thiab cov ntawv zeb, cov chaw kho dej khib nyiab, cov khoom noj khoom haus, thiab cov chaw ua zaub mov; ua tsis tiav septic systems; thiab lub nroog stormwater runoff.
Yuav ua li cas oxygen xav tau chav kawm 10?
Kev Xav Tau Los Ntawm Lub Neej (Biological Oxygen Demand) txhais tau tias yog tus nqi ntawm cov pa oxygen uas xav tau los ntawm cov kab mob aerobic kom tawg cov organic hauv cov qauv ntawm cov dej ntawm qhov kub thiab sijhawm.
Dab tsi ua rau cov pa roj ntsha lom neeg xav tau?
'Biochemical oxygen xav tau' yog qhov ntsuas ntawm ntau npaum li cas cov pa oxygen tau noj raws li microbes zom cov organic. … Kev xav tau oxygen biochemical siab tuaj yeem tshwm sim los ntawm: qib siab ntawm cov pa phem, feem ntau tshwm sim los ntawmcov dej khib nyiab kho tsis zoo; siab nitrate, uas ua rau cov nroj tsuag loj hlob.
