Muaj ntau hom carbon qhov chaw. Nws yog ib qho tseem ceeb los xaiv ib qho uas haum rau koj cov txheej txheem tshwj xeeb. Tsis txhob ntxiv lawv random. Xaiv qhov zoo carbon qhov yuav cawm koj teeb meem tom qab.
I. Vim li cas Ntxiv Cov Khoom Siv Hluav Taws Xob?
Kev kho dej khib nyiab tso siab rau cov kab mob kom txo qis cov pa phem, tshwj xeeb tshaj yog nyob rau hauv denitrification thiab tshem tawm phosphorus. Cov kab mob yuav tsum haus cov pa roj carbon monoxide (COD / BOD) kom ua haujlwm.
Yooj yim muab: Carbon qhov chaw="khoom noj" rau cov kab mob.
1. Denitrification (lub ntsiab yog vim li cas)
Nitrate nitrogen (tag nrho nitrogen) hauv cov dej khib nyiab yuav tsum tau hloov mus rau hauv cov pa nitrogen los ntawm denitrifying cov kab mob kom dim.
Cov kab mob no yuav tsum haus cov pa roj carbon monoxide. Cov pa roj carbon tsis txaus nyob rau hauv lub zog yuav ua rau muaj nitrogen ntau dhau.
2. Kev tshem tawm cov phosphorus lom
Accumulating phosphorus kab mob xav tau cov pa roj carbon monoxide tso tawm phosphorus thaum lub sij hawm anaerobic. Cov pa roj carbon tsis txaus ua rau kev tshem tawm cov phosphorus tsis zoo thiab tag nrho cov phosphorus ntau dhau.
3. Kev tuav tswj kev ua ub no ntawm cov kab mob lom
Tsis txaus cov organic teeb meem (piv txwv li, cov dej ntws hauv nroog, cov dej kho hauv tsev, tom qab- kho cov khoom siv roj ntsha) ua rau cov kab mob tshaib plab, cov sludge xoob, tsis muaj kev daws teeb meem, thiab txo qis kev kho mob.
II. Thaum twg Carbon Source Ntxiv Yuav Tsum Tau?
Carbon supplementation feem ntau tsim nyog yog tias ib qho ntawm cov xwm txheej hauv qab no tau ntsib:
1. Tsawg C / N piv (tsawg carbon, siab nitrogen), feem ntau pom nyob rau hauv cov dej khib nyiab, pov tseg cov khib nyiab pov tseg, tsev tua tsiaj / tsiaj txhu pov tseg, thiab tsawg- cov dej khib nyiab hauv nroog.
2. Tsis tu ncua tshaj cov qauv rau tag nrho cov nitrogen thiab tag nrho phosphorus nyob rau hauv cov effluent.
3. Siab dhau DO nyob rau hauv lub tank kho lom neeg, sludge dawb, tsis muaj qhov sib piv, thiab tsawg microbial biomass.
4. Cov txheej txheem: Tom qab- kho denitrification txheej txheem xws li AO, A²/O, MBR, denitrification lim, thiab tob- txaj lim.
Cov pa roj carbon ntau: Sodium acetate, qabzib, methanol, cov khoom sib xyaw carbon, muaj ethanol, thiab lwm yam.
III. Yuav ua li cas kom tau txais cov pa roj carbon tshem tawm yam tsis muaj cov pa roj carbon sab nraud
Txoj Kev: Siv cov pa roj carbon uas twb muaj lawm hauv lub cev, lossis ntxiv nrog cov pa roj carbon monoxide, los hloov cov khoom siv carbon.
1. Ua ntej siv cov pa roj carbon monoxide hauv cov dej khib nyiab (Ntau tshaj tus nqi-Txuag)
• Txhim kho kev faib tawm kom zoo: Ua ntej pub zaub mov siab -COD cov dej khib nyiab ntau (cov khoom siv concentrated, ntxuav cov dej khib nyiab, thiab cov dej khib nyiab) rau hauv thaj chaw anaerobic / anoxic rau denitrification thiab phosphorus tshem tawm.
• Shorten Aerobic Retention: Tsis txhob depleting tag nrho cov organic carbon nyob rau hauv aerobic cheeb tsam; khaws qee cov pa roj carbon monoxide rau denitrification hauv thaj chaw anoxic.
• Txo Pem Hauv Ntej-End Aeration: Khaws cov pa oxygen (DO) nyob rau hauv lub tank aerobic hauv qab qib siab (tswj 1-2 mg/L) kom tiv thaiv cov pa roj carbon monoxide los ntawm oxidized thiab noj yam tsis tsim nyog.
2. Sludge/In-System Carbon Source Reuse (Mainstream Solution)
• Sludge Hydrolysis thiab Acidification: Qhia tshaj cov sludge thiab thawj cov sludge rau hauv lub tank hydrolysis kom zom cov phab ntsa thiab tso tawm cov roj fatty acids (VFAs), uas yog siab -cov pa roj carbon zoo endogenous thiab rov qab mus rau thaj tsam anoxic.
• Lub hauv paus sedimentation sludge rov qab los: Cov sludge los ntawm lub hauv paus sedimentation tank muaj ib tug loj npaum li cas ntawm cov dej nyoos carbon thiab xa rov qab mus rau upstream anaerobic / anoxic cheeb tsam.
• Hydrolysis acidification tank efficiency txhim kho: Txhim kho hydrolysis zom cov organic molecules loj rau hauv me me, yooj yim muaj carbon molecules.
3. Kev hloov kho cov txheej txheem (hais txog carbon deficiency ntawm nws qhov chaw)
• Kho cov txheej txheem zoning: Xyuas kom lub anoxic zone precedes aerobic zone (tus qauv AO/A²/O), ua ntej cov pa roj carbon denitrification.
• Tshem tawm ntau dhau ua ntej- aeration kom tsis txhob depleting cov pa roj carbon qhov chaw ntws.
• High-nitrogen, qis- carbon wastewater: Ntxiv ua ntej- denitrification kom siv tau cov dej nyoos carbon.
4. Qhia qhov pheej yig cov pa roj carbon monoxide (tsis suav nrog cov khoom lag luam uas tau muag)
Siv cov nroj tsuag- cov khoom pov tseg los hloov pauv cov khoom siv carbon: Tsuas yog siv cov peev txheej tsim nyog rau koj cov kev xav tau tshwj xeeb; zam kev siv tsis raug cai thiab ib txwm ua me me - kev sim ua ntej siv cov peev txheej muaj.
• Siab -cov dej khib nyiab ntau hauv cov nroj tsuag, xws li cov khib nyiab hauv chav ua noj, txiv hmab txiv ntoo tev residue, distiller cov nplej, hmoov txhuv nplej siab, thiab cov txiv hmab txiv ntoo thiab zaub ua kua dej pov tseg.
• Cov dej khib nyiab los ntawm kev tu cov nroj tsuag, ntxuav hauv pem teb, thiab khib nyiab syrup/ starch -raws li kua.
Cov no suav hais tias yog siv pov tseg thiab tsis yog "ntxiv cov khoom lag luam carbon."
5. Kev tswj xyuas kev ua haujlwm tsis zoo
• Tswj tus nqi rov qab: Tswj kom zoo nitrification cawv rov qab thiab sludge rov qab los kom muaj kev sib cuag txaus ntawm carbon thiab nitrogen.
• Tswj MLSS (Mixed Lime Sludge Concentration): Sib tw sludge ntim rau thauj khoom; zam qhov muag tsis pom kev nce siab kom sib tw rau carbon.
• Kev tswj cov dej paug tawm: Tsis txhob muaj sludge tawm ntau dhau los ntawm cov txheej txheem tshem tawm phosphorus kom ntseeg tau tias cov metabolism hauv ib txwm muaj ntawm polyphosphate- khaws cov kab mob.
Ntxiv carbon=Tsis txaus cov organic carbon nyob rau hauv cov dej nyoos; microorganisms tsis muaj zaub mov, cuam tshuam nitrogen thiab phosphorus tshem tawm.
Txhawm rau kom tsis txhob ntxiv cov pa roj carbon monoxide ntxiv: Ua ntej txo cov pov tseg (tso cov pa roj carbon tsawg) + kais muaj peev xwm (sludge / rov siv dua) + txheej txheem kev hloov kho, siv qhov system tus kheej cov pa roj carbon monoxide ua thaub qab.
