Isano iri hagati ya COD na BOD

Kuvuga COD na BOD
Mu magambo yumwuga
COD isobanura imiti ya Oxygene ikenewe. Imiti ya Oxygene isabwa ni ikintu cyingenzi cyerekana ubwiza bw’amazi, ikoreshwa mu kwerekana ingano yo kugabanya ibintu (cyane cyane ibinyabuzima) mu mazi. Ibipimo bya COD bibarwa hakoreshejwe okiside ikomeye (nka potasiyumu dichromate cyangwa potassium permanganate) kugira ngo ivure ingero z’amazi mu bihe bimwe na bimwe, kandi ingano ya okiside ikoreshwa irashobora kwerekana hafi urugero urugero rw’imyanda ihumanya mu mibiri y’amazi. Ninini agaciro ka COD, niko umubiri wamazi uhumanye nibintu kama.
Uburyo bwo gupima imiti ya ogisijeni ikenerwa cyane cyane harimo uburyo bwa dichromate, uburyo bwa potasiyumu permanganate hamwe nuburyo bushya bwa ultraviolet. Muri byo, uburyo bwa potasiyumu dichromate ifite ibisubizo byo gupima byinshi kandi birakwiriye mugihe gikenewe neza, nko gukurikirana amazi mabi yinganda; mugihe uburyo bwa potasiyumu permanganate bworoshye gukora, mubukungu kandi bufatika, kandi burakwiriye kumazi yo hejuru, amasoko y'amazi n'amazi yo kunywa. Gukurikirana amazi.
Impamvu ziterwa na ogisijeni ikomoka ku miti ikunze kuba ifitanye isano n’ibyuka byoherezwa mu nganda, imyanda yo mu mijyi n’ibikorwa by’ubuhinzi. Ibintu kama no kugabanya ibintu biva muri ayo masoko byinjira mumazi yamazi, bigatuma indangagaciro za COD zirenga igipimo. Mu rwego rwo kurwanya COD ikabije, hagomba gufatwa ingamba zifatika zo kugabanya ibyuka bihumanya bituruka ku masoko y’umwanda no gushimangira kurwanya umwanda w’amazi.
Muri make, umwuka wa ogisijeni ukenera ni ikimenyetso cyingenzi kigaragaza urugero rw’imyanda ihumanya y’amazi. Dukoresheje uburyo butandukanye bwo gupima, dushobora kumva umwanda wamazi hanyuma tugafata ingamba zijyanye no kuvura.
BOD isobanura Biochemiki Oxygene isabwa. Umwuka wa ogisijeni ukomoka kuri biohimiki (BOD5) ni igipimo cyuzuye cyerekana ibirimo ibintu bisaba ogisijeni nkibintu kama mumazi. Iyo ibintu kama biri mumazi bihuye numwuka, byangirika na mikorobe mikorobe kandi bigahinduka organic cyangwa gaze. Ibipimo bya ogisijeni ikomoka kuri biohimiki isanzwe ishingiye ku kugabanuka kwa ogisijeni mu mazi nyuma yo kwitwara ku bushyuhe runaka (20 ° C) mu minsi runaka (ubusanzwe iminsi 5).
Impamvu zituma ogisijeni ikenerwa cyane ya biohimiki irashobora kuba irimo ibintu byinshi kama kama mumazi, byangirika na mikorobe kandi bigakoresha ogisijeni nyinshi. Kurugero, inganda, ubuhinzi, amazi yo mumazi, nibindi bisaba ko ogisijeni ikomoka kuri biohimiki igomba kuba munsi ya 5mg / L, mugihe amazi yo kunywa agomba kuba munsi ya 1mg / L.
Uburyo bwa ogisijeni ikenerwa na biohimiki ikubiyemo uburyo bwo kuyikoresha no kuyitera, aho igabanuka rya ogisijeni yashonze nyuma y’icyitegererezo cy’amazi yinjijwe mu bushyuhe buri gihe kuri 20 ° C mu minsi 5 ikoreshwa mu kubara UMUBIRI. Byongeye kandi, igipimo cya ogisijeni ikomoka ku binyabuzima ikenerwa na ogisijeni ikomoka ku miti CO (COD) irashobora kwerekana umubare w’imyanda ihumanya mu mazi bigoye ko mikorobe ibora. Iyi myanda ihumanya igoye kubora itera kwangiza cyane ibidukikije.
Umwuka wa ogisijeni ukomoka ku binyabuzima (umutwaro wa BOD) urakoreshwa kandi mu kwerekana ingano y’ibintu bitunganyirizwa kuri buri gipimo cy’ibikorwa byo gutunganya amazi mabi (nka filtri y’ibinyabuzima, ibigega bya aeration, nibindi). Ikoreshwa mukumenya ingano yibikorwa byo gutunganya amazi mabi nigikorwa nogucunga ibikoresho. ibintu by'ingenzi.
COD na BOD bifite ibintu bihuriweho, ni ukuvuga ko bishobora gukoreshwa nkigipimo cyuzuye kugirango kigaragaze ibirimo umwanda wangiza mumazi. Imyitwarire yabo kuri okiside yibintu kama iratandukanye rwose.
COD: Uburyo butinyitse kandi butabujijwe, muri rusange bukoresha potasiyumu permanganate cyangwa potasiyumu dichromate nka okiside, ikongerwaho no gusya cyane. Yita kuburyo bwihuse, bwuzuye kandi butagira ubugome, kandi igahindura ibintu byose kama mugihe gito binyuze muri spekitifotometometrie, dichromate Ingano ya ogisijeni yakoreshejwe ibarwa nuburyo bwo gutahura nkuburyo, bwandikwa nka CODcr na CODmn ukurikije bitandukanye okiside. Mubisanzwe, potasiyumu dichromate ikoreshwa mugupima imyanda. Agaciro ka COD gakunze kuvugwa mubyukuri ni agaciro ka CODcr, na potasiyumu permanganate nigiciro cyapimwe kumazi yo kunywa n'amazi yo hejuru bita indangagaciro ya permanganate, nayo agaciro ka CODmn. Ntakibazo oxydeant ikoreshwa mugupima COD, agaciro ka COD niko kiyongera, niko umwanda ukabije wanduye.
UMUBIRI: Ubwoko bworoheje. Mu bihe byihariye, ibinyabuzima byifashishwa mu kubora ibinyabuzima byangirika mu mazi kugira ngo bibare ingano ya ogisijeni yashonze ikoreshwa mu binyabuzima. Witondere intambwe ku yindi. Kurugero, niba igihe cya okiside yibinyabuzima ari iminsi 5, byandikwa nkiminsi itanu ya biohimiki. Oxygene ikenerwa (BOD5), bihuye na BOD10, BOD30, BOD yerekana urugero rwibinyabuzima byangirika mumazi. Ugereranije na okiside ikaze ya COD, biragoye ko mikorobe itera okiside ibintu bimwe na bimwe kama, bityo agaciro ka BOD gashobora gufatwa nkimyanda Ubwinshi bwibintu kama bishobora kwangirika.
, ifite akamaro gakomeye mugutunganya imyanda, kwisukura imigezi, nibindi.

COD na BOD byombi byerekana ubunini bwimyanda ihumanya mumazi. Ukurikije igipimo cya BOD5 / COD, hashobora kuboneka ibipimo byerekana ibinyabuzima byangiza imyanda:
Inzira ni: BOD5 / COD = (1-α) × (K / V)
Iyo B / C ＞ 0.58, biodegradable rwose
B / C = 0.45-0.58 biodegradabilite nziza
B / C = 0.30-0.45 Biodegradable
0.1B / C ＜ 0.1 Ntabwo biodegradable
BOD5 / COD = 0.3 mubisanzwe bishyirwaho nkurugero rwo hasi rwimyanda ishobora kwangirika.
Lianhua irashobora gusesengura byihuse ibisubizo bya COD mumazi muminota 20, kandi irashobora gutanga reagent zitandukanye, nka porojeri yifu, reagent yamazi na reagent yabanje gukorwa. Igikorwa gifite umutekano kandi cyoroshye, ibisubizo byihuse kandi byukuri, ikoreshwa rya reagent ni rito, kandi umwanda ni muto.
Lianhua irashobora kandi gutanga ibikoresho bitandukanye byo kumenya BOD, nkibikoresho bikoresha uburyo bwa biofilm kugirango bipime vuba BOD muminota 8, na BOD5, BOD7 na BOD30 bikoresha uburyo butandukanye bwumuvuduko ukabije wa mercure, bikwiranye nibintu bitandukanye byo gutahura.