Txawm hais tias kev ua liaj ua teb nqaij qaib tau nce hauv kev muaj koob npe hauv tebchaws Africa xyoo dhau los, nws yog qhov tseem ceeb ua haujlwm me me.Hauv ob peb xyoos dhau los, txawm li cas los xij, nws tau dhau los ua kev lag luam loj, nrog ntau tus tub ntxhais hluas ua lag luam tsom rau cov txiaj ntsig zoo nkauj ntawm kev muab.Cov neeg nqaij qaib ntau dua 5 000 tam sim no muaj ntau heev tab sis qhov kev txav mus rau kev tsim khoom loj tau ua rau muaj kev txhawj xeeb rau pej xeem txog kev pov tseg pov tseg.Qhov teeb meem no, nthuav, kuj muaj txiaj ntsig zoo.
Kev tsim khoom loj dua tau nthuav tawm ntau yam kev sib tw, tshwj xeeb tshaj yog hais txog kev pov tseg pov tseg.Cov lag luam me tsis nyiam cov neeg saib xyuas ib puag ncig tab sis kev lag luam nrog cov teeb meem ib puag ncig yuav tsum ua raws li cov qauv kev nyab xeeb ib puag ncig.
Interestingly, qhov kev sib tw ntawm cov khib nyiab khib nyiab yog muab sijhawm rau cov neeg ua liaj ua teb los daws cov teeb meem loj: qhov muaj thiab cov nqi hluav taws xob.Hauv qee lub tebchaws African, ntau qhov kev lag luam yws txog tus nqi siab ntawm lub zog thiab ntau tus neeg nyob hauv nroog siv cov tshuab hluav taws xob vim tias lub zog tsis muaj kev ntseeg siab.Kev hloov pauv ntawm cov khib nyiab pov tseg rau hauv hluav taws xob los ntawm kev siv biodigesters tau dhau los ua qhov kev cia siab txaus nyiam, thiab ntau tus neeg ua liaj ua teb tau tig mus rau nws.
Kev hloov pauv ntawm cov khib nyiab pov tseg rau hauv hluav taws xob yog ntau tshaj qhov nyiaj ntxiv, vim tias hluav taws xob yog cov khoom lag luam tsawg hauv qee lub tebchaws African.Lub biodigester yog ib qho yooj yim los tswj, thiab tus nqi tsim nyog, tshwj xeeb tshaj yog thaum koj saib cov txiaj ntsig mus ntev
Ntxiv nrog rau kev tsim hluav taws xob biogas, txawm li cas los xij, biogas pov tseg, cov khoom siv los ntawm biodigester project, yuav ua rau ib puag ncig ncaj qha vim nws cov nyiaj ntau, siab concentration ntawm ammonia nitrogen thiab organic teeb meem, thiab tus nqi ntawm kev thauj mus los, kev kho mob thiab kev siv. siab.Cov xov xwm zoo yog biogas pov tseg los ntawm biodigester muaj txiaj ntsig zoo dua qub, yog li peb yuav siv tag nrho cov khoom pov tseg biogas li cas?
Cov lus teb yog biogas chiv.Biogas pov tseg muaj ob hom: ib qho yog kua (biogas slurry), suav txog li 88% ntawm tag nrho.Qhov thib ob, cov khoom seem (biogas residue), suav txog li 12% ntawm tag nrho.Tom qab biodigester pov tseg yog muab rho tawm, nws yuav tsum tau precipitated rau ib lub sij hawm ntawm lub sij hawm (secondary fermentation) ua kom cov khoom thiab kua cais lawm.Khoom - kua separatorkuj tseem siv tau los cais cov kua thiab cov khoom seem biogas pov tseg.Biogas slurry muaj cov khoom noj xws li muaj nitrogen, phosphorus thiab potassium, nrog rau cov kab mob xws li zinc thiab hlau.Raws li kev txiav txim siab, biogas slurry muaj tag nrho cov nitrogen 0.062% ~ 0.11%, ammonium nitrogen 200 ~ 600 mg / kg, muaj phosphorus 20 ~ 90 mg / kg, muaj poov tshuaj 400 ~ 1100 mg / kg.Vim nws cov nyhuv nrawm, kev siv cov khoom noj muaj txiaj ntsig zoo, thiab tuaj yeem nqus tau sai los ntawm cov qoob loo, nws yog ib hom zoo dua ntau cov txiaj ntsig ceev compound fertilizer.Cov khoom siv biogas residue chiv, cov khoom noj khoom haus thiab biogas slurry yog qhov zoo ib yam, muaj 30% ~ 50% organic teeb meem, 0.8% ~ 1.5% nitrogen, 0.4% ~ 0.6% phosphorus, 0.6% ~ 1.2% potassium, tab sis kuj nplua nuj nyob rau hauv humic. acid ntau tshaj 11%.Humic acid tuaj yeem txhawb kev tsim cov av sib sau ua ke, txhim kho av fertility tuav thiab cuam tshuam, txhim kho av lub cev thiab tshuaj lom neeg, cov nyhuv amelioration av yog qhov pom tseeb heev.Qhov xwm ntawm biogas residue fertilizer yog tib yam li cov organic chiv, uas belongs rau cov nyhuv lig fertilizer thiab muaj qhov zoo tshaj plaws mus sij hawm ntev.
Kev tsim cov tshuab siv biogasslurryua kua chiv
Lub biogas slurry yog pumped mus rau hauv lub tshuab yug me nyuam rau deodorization thiab fermentation, thiab ces cov fermented biogas slurry yog sib cais los ntawm cov khoom-kua sib cais ntaus ntawv.Cov kua sib cais yog pumped rau hauv lub elemental complexing reactor thiab lwm yam tshuaj chiv chiv ntxiv rau complexing cov tshuaj tiv thaiv.Lub complexing tshuaj tiv thaiv kua yog pumped rau hauv kev sib cais thiab los nag system kom tshem tawm cov insoluble impurities.Cov kua dej sib cais tau muab tso rau hauv lub tshuab hluav taws xob chelating, thiab cov kab uas xav tau los ntawm cov qoob loo yog ntxiv rau cov tshuaj tiv thaiv chelating.Tom qab cov tshuaj tiv thaiv tiav lawm, cov kua chelate yuav tau muab tso rau hauv lub tank tiav kom tiav lub raj mis thiab ntim.
Kev tsim cov cuab yeej siv biogas residue los ua cov organic chiv
Cov khib nyiab biogas cais tau tov nrog straw, ncuav mog qab zib thiab lwm cov ntaub ntawv crushed rau ib qho me me, thiab cov ntsiab lus noo noo tau hloov mus rau 50% -60%, thiab C / N piv tau hloov kho rau 25: 1.Cov kab mob fermentation tau muab tso rau hauv cov khoom sib xyaw, thiab tom qab ntawd cov khoom siv los ua ib pawg sib xyaw, qhov dav ntawm pawg tsis tsawg dua 2 meters, qhov siab tsis tsawg tshaj li 1 meters, qhov ntev tsis txwv, thiab lub tank. Cov txheej txheem aerobic fermentation kuj tseem siv tau.Ua tib zoo saib xyuas qhov kev hloov ntawm noo noo thiab kub thaum lub sij hawm fermentation kom lub aeration nyob rau hauv pawg.Nyob rau theem pib ntawm fermentation, cov dej noo yuav tsum tsis pub tsawg tshaj 40%, txwv tsis pub nws tsis tsim nyog rau kev loj hlob thiab kev loj hlob ntawm cov kab mob, thiab cov dej noo yuav tsum tsis txhob siab dhau, uas yuav cuam tshuam rau qhov cua.Thaum qhov kub ntawm pawg nce mus rau 70 ℃, lub compost turner tshuabyuav tsum tau siv tig pawg kom txog thaum nws tag nrho rotted.
Kev sib sib zog nqus ntawm cov organic chiv
Tom qab cov khoom fermentation thiab maturation, koj tuaj yeem sivorganic chiv ua khoom sivrau kev ua haujlwm tob.Ua ntej, nws tau ua tiav rau hauv cov hmoov nplej organic chiv.Covtxheej txheem ntawm powdery organic chivyog qhov yooj yim.Ua ntej, cov khoom raug crushed, thiab tom qab ntawd cov impurities hauv cov khoom raug tshuaj xyuas los ntawm kev siv atshuaj ntsuam tshuab, thiab thaum kawg lub ntim tuaj yeem ua tiav.Tab sis ua rau hauvgranular organic chiv, granular organic ntau lawm txheej txheem yog ntau complex, thawj cov khoom rau crush, tshuaj ntsuam tawm impurities, cov khoom rau granulation, thiab ces cov hais rauziab, cua txias, txheej, thiab thaum kawg ua kom tiavntim.Ob txoj kev tsim khoom muaj lawv tus kheej qhov zoo thiab qhov tsis zoo, cov hmoov organic chiv cov txheej txheem yog qhov yooj yim, kev nqis peev me me, tsim nyog rau lub Hoobkas tshiab qhib organic chiv,granular organic chiv ntau lawm txheej txheemyog complex, peev yog siab, tab sis granular organic chiv tsis yooj yim rau agglomerate, daim ntawv thov yog yooj yim, cov nyiaj txiag nqi yog siab dua.
Post lub sij hawm: Jun-18-2021