MBBR rau Winery Wastewater: Case Study on Performance, Microbial Dynamics & Design

MBBR Kev Kho Mob Winery Wastewater-A Case Study on Performance, Microbial Dynamics, and Engineering Implications

Abstract

Cov ntaub ntawv ntxaws ntxaws no nthuav tawm cov kev tshawb pom ntawm ib qho kev tshawb fawb ywj pheej tsom rau kev soj ntsuam kev ua tau zoo thiab kev ua haujlwm tau zoo ntawm Moving Bed Biofilm Reactor (MBBR) txheej txheem rau kev kho cov dej khib nyiab winery -ib qho kev sib tw effluent uas muaj zog raws caij nyoog hloov pauv, siab organic zog, qis pH, thiab muaj cov tshuaj tiv thaiv zoo li polyphenols. Lub hom phiaj tseem ceeb yog txhawm rau tshawb xyuas cov txheej txheem kev ua tau zoo nyob rau hauv kev simulated fluctuating loads, nrog rau ib qho tseem ceeb ntawm cov lus teb hloov thiab kev ua tiav zoo nyob rau hauv cov tub ntxhais microbial cov zej zog- ob qho tib si kab mob thiab fungal. Cov kev tshawb fawb siv ntau-theem kev sim tsim, sib txuas cov kev ntsuas dej zoo sib xws nrog cov txheej txheem qib siab molecular (siab-throughput sequencing) thiab biopolymer characterization (Extracellular Polymeric Substances analysis). Cov txiaj ntsig tau pom tias MBBR teeb tsa ua tiav kev tshem tawm cov pa phem thiab ruaj khov thoob plaws ntau qhov chaw thau khoom. Qhov tseem ceeb, txoj kev tshawb no muab cov lus piav qhia txog kev ruaj ntseg no los ntawm kev sib txuas cov kev ua tau zoo mus rau kev ua tiav hauv cov koom haum microbial, uas tshwj xeeb, kev ua siab ntev ua kom muaj txiaj ntsig hauv kev ntxhov siab. Cov kev tshawb pom muaj cov ntaub ntawv tseem ceeb, pov thawj-raws li kev nkag siab rau kev tsim, kev ua haujlwm, thiab kev ua kom zoo ntawm cov kab mob lom rau cov dej khib nyiab raws caij nyoog, txuas ntxiv qhov cuam tshuam dhau ntawm kev lag luam winery mus rau lwm qhov kev lag luam agro- cov ntawv thov kev lag luam nrog cov ntaub ntawv zoo sib xws.

1. Kev Taw Qhia thiab Kev Tshawb Fawb Lub Hom Phiaj

Kev kho cov dej khib nyiab winery ua rau muaj teeb meem sib txawv rau cov txheej txheem lom neeg. Tsim feem ntau thaum lub sijhawm ua haujlwm tu thiab los ntawm kev nchuav, cov dej khib nyiab no tau txheeb xyuas los ntawm qhov sib txawv heev thiab muaj pes tsawg leeg raws li lub caij nyoog vintage thiab bottling. Nws cov ntaub ntawv tshuaj muaj xws li cov ntsiab lus siab ntawm biodegradable substrates (qab zib, ethanol, organic acids) nrog rau ntau dua recalcitrant thiab inhibitory compounds, tshwj xeeb tshaj yog polyphenols. Qhov kev sib xyaw ua ke no tuaj yeem ua rau cov txheej txheem tsis ruaj khov hauv cov tshuab uas tsis muaj biomass txaus khaws cia thiab microbial ntau haiv neeg.

Lub Moving Bed Biofilm Reactor (MBBR) thev naus laus zis, uas siv cov khoom siv yas buoyant los txhawb kev loj hlob ntawm cov ntaub ntawv biofilm txuas nrog thaum tseem tswj xyuas cov biomass raug tshem tawm, nthuav tawm cov lus cog tseg. Nws qhov txiaj ntsig zoo nyob hauv-nrog rau cov khoom ntim ntim siab, kev ua haujlwm siab rau kev poob siab, kev cog lus hneev taw, thiab txo cov sludge ntau lawm-yog qhov theoretically zoo- haum rau cov dej khib nyiab winery. Txawm li cas los xij, kev nkag siab zoo ntawm nws cov kev txwv kev ua haujlwm, qhov tshwj xeeb microbial ecology uas tsim nyob rau hauv cov dej khib nyiab, thiab cov zej zog cov tswv yim hloov tau xav tau.

Yuav kom daws tau qhov kev paub tsis sib xws, qhov kev tshawb fawb no tau tsim nrog lub hom phiaj tseem ceeb hauv qab no:

1. Txhawm rau ntsuas qhov ua tau zoo ntawm kev kho mob (COD, phenol tshem tawm) ntawm tus kws tsav dav hlau- teev MBBR cov kab ke hla ib qho spectrum ntawm cov nqi thauj khoom organic simulating raws caij nyoog hloov pauv.
2. Txhawm rau taug qab kev hloov pauv ntawm cov khoom siv organic tshwj xeeb (qab zib, kua qaub, ethanol, phenols) txhawm rau txheeb xyuas txoj hauv kev degradation thiab muaj peev xwm npaum li cas - txwv cov kauj ruam.
3. Txhawm rau txheeb xyuas qhov tsim thiab muaj pes tsawg leeg ntawm microbial Extracellular Polymeric Substances (EPS) nyob rau hauv ob qho tib si biofilm thiab ncua sij hawm raws li ib qho kev qhia txog biochemical ntawm microbial kev nyuaj siab teb thiab aggregate stability.
4. Txhawm rau ua tus yam ntxwv ntawm cov qauv thiab kev ua tiav ntawm cov kab mob thiab cov kab mob fungal siv siab -throughput sequencing, yog li txuas cov microbiological hloov ncaj qha rau kev ua haujlwm thiab kev ua haujlwm ntawm lub cev.
5. Txhawm rau muab cov kev tshawb pom no rau hauv cov txheej txheem tsim vaj tsev tsim nyog rau kev tsim thiab kev ua haujlwm ntawm tag nrho - nplai MBBR kho cov khoom siv hluav taws xob sib txawv.

2. Cov ntaub ntawv thiab cov txheej txheem kev sim

2.1 Pilot-Scale MBBR System Setup

The study was conducted using a laboratory-scale MBBR reactor constructed from clear acrylic with a total working volume of 4.4 liters. The reactor was equipped with a fine-bubble aeration system at the base to maintain oxygen saturation and ensure continuous mixing and carrier circulation. The biofilm support media consisted of commercially available K3 polyethylene carriers (MBBR19,specific surface area >500 m² / m³), ​​ntxiv ntawm volumetric filling piv ntawm 30%, uas yog nyob rau hauv qhov zoo tshaj plaws ntau yam rau MBBR lag luam. Lub twj tso kua mis peristaltic muab cov khoom noj tsis tu ncua, thiab lub kaw lus tau ua haujlwm ntawm lub sijhawm Hydraulic Retention Time (HRT) tas li ntawm 3 teev. Dissolved Oxygen (DO) tau ua tib zoo khaws cia ntawm 3.9 ± 0.3 mg / L thoob plaws txhua theem kev sim kom ntseeg tau tias muaj kev mob aerobic tag nrho.

2.2 Simulated Dej khib nyiab thiab cov theem ua haujlwm

Cov khoom siv hluav taws xob tau tsim los ntawm diluting cov qhabnias, siab -lub zog ua haujlwm dej cawv (thawj COD ~ 220,000 mg / L) nrog dej kais. Txhawm rau kom muaj kev loj hlob zoo ntawm microbial, macronutrients tau ntxiv rau hauv daim ntawv ntawm ammonium chloride (NH₄Cl) thiab monopotassium phosphate (KH₂PO₄) kom tswj tau COD: N: P piv ntawm kwv yees li 100: 5: 1. Cov kev tshawb fawb tau teeb tsa ua peb ntu ua haujlwm sib law liag, txhua lub sijhawm ntev txaus kom ua tiav- lub xeev cov xwm txheej (raws li tau hais los ntawm COD ruaj khov tshaj li 5 hnub sib law liag). Cov theem sawv cev nce qib nce hauv cov organic thauj khoom:

• Theem 1 (Low Load): Target influent COD ≈ 500 mg/L
• Theem 2 (nruab nrab Load): Target influent COD ≈ 1,000 mg/L
• Theem 3 (High Load): Target influent COD ≈ 1,500 mg/L

Qhov kev tsim no tso cai rau kev soj ntsuam ncaj qha ntawm kev hloov kho thiab kev ua haujlwm gradients.

2.3 Analytical Framework thiab Sampling Protocol

Pab neeg tshawb fawb tau siv cov txheej txheem nruj, ntau-tiered analytical raws tu qauv:

• Kev soj ntsuam cov txheej txheem niaj hnub: Kev ntsuas txhua hnub ntawm COD muaj txiaj ntsig thiab cov dej ntws tawm (siv cov txheej txheem spectrophotometric), pH, DO, thiab kub. Tag nrho cov ntsiab lus phenolic kuj tau saib xyuas txhua hnub los ntawm Folin-Ciocalteu txoj kev.
• Cov ntsiab lus Organic Speciation: Thaum mus txog qhov ruaj khov- xeev nyob rau hauv txhua theem, cov qauv ua kua dej sib xyaw tau txheeb xyuas siv High-Kev Ua Haujlwm Liquid Chromatography (HPLC) rau cov suab thaj (fructose, qabzib, sucrose) thiab cov organic acids (tartaric, malic, aceticol Chrom, thiab lwm yam), thiab lwm yam. Qhov no ua rau muaj kev sib npaug loj ntawm kev tshem tawm cov pa roj carbon.
• Microbial Matrix Analysis: Cov qauv biomass (ob qho tib si tshem tawm cov sludge thiab ua tib zoo sau biofilm) tau sau ib ntus rau EPS rho tawm. Ib txoj kev rho tawm thermal tau siv los cais Loosely Bound (LB) thiab Tightly Bound (TB) EPS feem. Cov ntsiab lus polysaccharide (PS) tau txiav txim siab los ntawm anthrone-sulfuric acid txoj kev, thiab cov ntsiab lus protein (PN) los ntawm Bradford txoj kev, tso cai rau kev suav ntawm PN / PS ratio- qhov taw qhia tseem ceeb ntawm biofilm cohesion thiab kev sib haum xeeb.
• Microbial Community Profiling: Thaum kawg ntawm txhua theem ua haujlwm, cov qauv biomass tau khaws cia rau DNA rho tawm. Illumina MiSeq siab-throughput sequencing tau ua lub hom phiaj ntawm cheeb tsam V3-V4 ntawm cov kab mob 16S rRNA noob thiab thaj tsam ITS1 rau cov kab mob fungi. Bioinformatic tsom xam muab cov ntaub ntawv ntawm microbial ntau haiv neeg (alpha thiab beta), lub zej zog muaj pes tsawg leeg ntawm phylum thiab genus theem, thiab cov txheeb ze ntawm cov tseem ceeb taxa.

3. Cov txiaj ntsig thiab hauv -Kev sib tham tob

3.1 Kev ua tau zoo thiab kho tau zoo

MBBR system qhia tau tshwj xeeb kev ruaj ntseg thiab kev ua haujlwm zoo. Raws li cov organic load nce stepwise los ntawm Theem 1 mus rau Theem 3, COD tshem tawm efficiency paradoxically txhim kho, nce los ntawm 76.1% mus rau 88.5%. Qhov no qhia tsis tau tsuas yog kam rau ua tab sis txhim khu kev ua haujlwm catabolic ntawm ntau dua substrate muaj. Qhov tseem ceeb tshaj, qhov zoo ntawm COD cov dej tsis zoo tseem nyob hauv siab, nyob qis dua 200 mg / L nyob rau hauv txhua rooj plaub-tus nqi uas ua tau raws li cov qauv siv rov qab nruj dua lossis tso tawm hauv ntau thaj tsam.

Kev tshem tawm tag nrho cov phenolics, cov tebchaw paub txog lawv cov khoom siv tshuaj tua kab mob, yog qhov tseem ceeb sib npaug. Kev tshem tawm tus nqi ruaj khov ntawm 79% thiab 80% nyob rau hauv nruab nrab thiab siab-load theem, qhia tias cov zej zog microbial acclimatized thiab xaiv rau phenol-degrading los yog phenol{5}}cov neeg mob siab ntev. Qhov kev muaj peev xwm los tswj cov tshuaj tiv thaiv kab mob yog qhov tseem ceeb rau kev kho cov dej khib nyiab.

3.2 Txoj hmoo ntawm Organic Constituents thiab txheej txheem kev pom

Cov ncauj lus kom ntxaws txog cov organic ua rau pom qhov tseem ceeb: txoj hauv kev degradation hauv MBBR tau ua haujlwm zoo rau feem ntau cov substrates. Qab zib thiab cov organic acids raug tshem tawm tag nrho, nrog rau cov concentrations hauv cov dej ntws hauv qab qhov ntsuas ntsuas ntsuas. Ib yam li ntawd, tshwj xeeb monomeric phenols tsis tau kuaj pom nyob rau hauv cov tshuaj tua kab mob.

Qhov tshwj xeeb tshwj xeeb yog ethanol. Thaum txo qis, nws tseem nyob tam sim no thiab tau suav los ua ntau dua 93% ntawm cov seem COD hauv cov dej ntws tawm thoob plaws txhua theem. Qhov no txheeb xyuas ethanol oxidation raws li qhov yuav muaj tus nqi - txwv cov kauj ruam hauv tag nrho cov txheej txheem mineralization nyob rau hauv cov kev sim. Rau cov kws tsim khoom, qhov no taw qhia lub hom phiaj tshwj xeeb rau kev ua kom zoo, xws li kho cov pa oxygenation lossis tshawb xyuas cov txheej txheem anaerobic / aerobic yog tias yuav tsum tau tshem tawm ethanol ntxiv.

3.3 EPS Dynamics: Microbial "Safety Net"

Kev soj ntsuam ntawm Extracellular Polymeric Tshuaj tau qhia meej meej microbial kev ntxhov siab. Tag nrho EPS cov ntsiab lus hauv ob qho tib si raug tshem tawm thiab txuas nrog biomass tau nce zuj zus nrog txhua qhov nce hauv kev thauj khoom organic. Qhov no yog qhov zoo-cov ntaub ntawv tshwm sim uas cov kab mob microbes tsim EPS ntau dua los ua kev tiv thaiv matrix thiab txhim kho substrate entrapment.

Qhov kev tshawb pom ntau dua yog qhov hloov pauv hauv EPS muaj pes tsawg leeg. Cov protein-rau-polysaccharide (PN/PS) piv tau nce tsis tu ncua los ntawm Theem 1 mus rau Theem 3. Txij li thaum cov proteins pab txhawb ntxiv rau cov txheej txheem kev ncaj ncees thiab hydrophobicity ntawm microbial aggregates dua li polysaccharides, ntau dua PN/PS ratio yog txuam nrog muaj zog, ntau dua thiab ntau dua {dense. Qhov kev hloov pauv biochemical no ncaj qha cuam tshuam nrog kev pom zoo sludge sedimentation thoob plaws hauv txoj kev tshawb fawb, piav qhia txog ib lub tswv yim rau kev ruaj ntseg ntawm lub cev - nws nquag txhim kho nws tus kheej cov khoom - cov kua dej sib cais hauv qab load.

3.4 Microbial Community Succession: Tus yuam sij rau Resilience

Qhov kev tshawb pom muaj txiaj ntsig zoo tshaj plaws tau tshwm sim los ntawm cov ntaub ntawv sib txuas, uas tau muab cov lus qhia txog qib molecular - ntawm kev hloov hauv zej zog.

• Bacterial Community Shifts: Lub zej zog tau ua tiav qhov kev ua tiav tiav. Thaum ntxov, qis dua -load theem, genera zoo li Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium (koom nrog phenol degradation) yog qhov tseem ceeb. Raws li kev thauj khoom thiab kev ntxhov siab (pH qis dua los ntawm cov kua qaub, ntau dua ethanol) tau nce hauv Phase 3, qhov kev hloov pauv tseem ceeb tshwm sim.Delftiatau tshwm sim raws li qhov tseem ceeb genus, tshwj xeeb tshaj yog nyob rau hauv cov sludge tshem tawm. Qhov no yog ib qho txiaj ntsig tseem ceeb, raws li hom Delftia tau sau tseg kom muaj peev xwm ua kom muaj zog hauv cov metabolism hauv kev ua kom cov organics tsis zoo, nthuav tawm cov peev xwm aerobic denitrification, thiab, qhov tseem ceeb, paub txog lawv kev ua siab ntev rau ib puag ncig kev ntxhov siab xws li pH qis thiab siab ethanol concentrations. Lub enrichment ntawm Delftia yog ib tug ncaj qha microbiological piav qhia rau lub kaw lus tswj kev ua tau zoo ntawm siab load.
• Fungal Community Stability: In contrast to the shifting bacterial populations, the fungal community was dominated with remarkable consistency (>94% txheeb ze abundance) los ntawm phylum Ascomycota, feem ntau cov genus Dipodascus. Fungi nyob rau hauv Dipodascus genus feem ntau pom muaj nyob rau hauv qab zib- ib puag ncig nplua nuj thiab muaj feem cuam tshuam rau kev degradation ntawm complex carbohydrates, sawv cev rau ib tug ruaj khov, tshwj xeeb feem ntawm kev kho mob consortium.

4. Cov ntsiab lus xaus thiab Kev Txhais Lus Txhais Kev Tsim Nyog

Qhov kev kawm tiav no ua pov thawj pom tau tias MBBR txheej txheem yog ib qho kev siv tau zoo thiab muaj peev xwm daws teeb meem rau cov teeb meem uas tshwm sim hauv kev kho dej khib nyiab. Nws hybrid ncua kev loj hlob / biofilm hom kev loj hlob txhawb kev sib txawv thiab hloov kho microbial ecosystem muaj peev xwm tuav cov kev hloov pauv tseem ceeb hauv cov organic thiab hydraulic loading thaum muaj txiaj ntsig zoo degrading inhibitory tebchaw.

Kev tshawb fawb txhais los ntawm kev soj ntsuam kev pom mus rau cov txiaj ntsig engineering los ntawm cov lus pom zoo hauv qab no:

1. Tsim rau Variability: Lub zog tseem ceeb ntawm MBBR yog tuav qhov sib txawv, tab sis qhov no yuav tsum tau txais kev txhawb nqa los ntawm kev sib npaug ntawm cov dej ntws txaus. Cov kws tsim qauv tsim qauv yuav tsum ua qhov tseem ceeb txaus ntsuas lub tank ntim kom dampen lub sijhawm ntev heev thiab lub caij nyoog txaus thiab qhov siab tshaj plaws ntawm cov khoom lag luam.
2. Ua haujlwm nrog Biological Insight: Cov neeg ua haujlwm yuav tsum nkag siab tias lub zej zog microbial yog tus kheej - optimizing. Tsis yog kev cuam tshuam hnyav, kev txhawb nqa yog qhov tseem ceeb. Qhov no suav nrog kev ua kom ruaj khov, txaus oxygenation (tshwj xeeb tshaj yog hais txog ethanol degradation tus nqi) thiab tsis txhob muaj pH poob siab uas tuaj yeem ua rau lub zej zog tsim, hloov kho.
3. Leverage Microbial Indicators: Kev saib xyuas yuav tsum txuas ntxiv mus dhau qhov tsis muaj qhov tseem ceeb. Sludge Volume Index (SVI) los yog kev soj ntsuam microscopic tuaj yeem muab kev ceeb toom ntxov ntawm kev ntxhov siab. Txoj kev tshawb fawb tau lees paub tias qhov kev sib haum xeeb zoo yog txuas nrog kev noj qab haus huv microbial teb (nce PN / PS piv).
4. Xav txog theem lossis Hybrid Systems: Rau cov dej khib nyiab uas xav tau kev tshem tawm ntau dua, qhov kev txheeb xyuas ntawm ethanol raws li cov khoom seem seem qhia tias cov kauj ruam ua ntej anaerobic (xws li, rau acidogenesis) lossis cov txheej txheem oxidation hauv qab no tuaj yeem ua ke nrog MBBR rau kev kho kom tiav.

Hauv cov ntsiab lus, qhov kev tshawb fawb no muab cov ntaub ntawv pov thawj, kev tshawb fawb -rov qab daim ntawv qhia txog kev siv MBBR thev naus laus zis hauv kev lag luam cawv. Tsis tas li ntawd, cov ntsiab cai tseem ceeb uas tsis tau pom dua -hais txog kev xaiv cov kab mob microbial, EPS- kev ruaj ntseg nruab nrab, thiab kev vam meej hauv zej zog nyob rau hauv kev ntxhov siab- yog dav siv rau kev kho mob lom ntawm ntau lwm yam raws caij nyoog, siab - lub zog agro- cov dej khib nyiab hauv kev lag luam, xws li cov khoom siv hluav taws xob, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob.