Plaub theem ntawm Activated Sludge Acclimation

Qhia dej rau lub tshuab hluav taws xob lom thiab pib lub tshuab nqus dej.

Txuas ntxiv qhia dej kom txog thaum tsim tau qhov dej tob tob mus txog. Homogenize cov inoculated sludge nyob rau hauv lub bio reactor. Pib aeration siv lub tshuab tshuab aeration, maj mam nce lub aeration tus nqi thaum lub sij hawm nruam dej taw qhia tom qab sludge inoculation kom txog thaum lub siab tshaj plaws aeration tus nqi mus txog. Ua kom rov ua haujlwm sab hauv, sau lub tank aeration nrog dej khib nyiab, tom qab ntawd nres cov dej ntws, tsuas yog cov khoom siv aeration rau oxygenate lub tank rau 1-2 hnub.

Txuas ntxiv qhia dej mus rau hauv lub tank thib ob sedimentation. Thaum lub tank yog ib nrab puv, kaw tawm sab hauv recirculation nyob rau hauv lub bio reactor thiab pib lub sedimentation tank scraper thiab sludge rov qab twj tso kua mis. Qhov no tso cai rau cov activated sludge nyob rau hauv lub thib ob sedimentation tank yuav tsum tau sai sai sau thaum lub sij hawm pib acclimation theem thiab rov qab mus rau lub biological kho tank. Kho cov sludge rov qab los ntawm kev soj ntsuam cov sludge rov qab los; Feem ntau, nws yuav tsum tau tswj ntawm 50% thiab 100%. Thaum lub thib ob sedimentation tank nce mus txog nws cov dej ua hauj lwm ib txwm, saib xyuas cov activated sludge mob thiab tswj cov influent txaus kom txog rau thaum indistinct flocculent teeb meem tshwm. Hauv qhov no, tsim nyog nce thiab hloov cov dej kom ntxiv cov as-ham. Thaum lub sij hawm no, kho qhov muaj zog txaus tus nqi thiab lub sijhawm ua haujlwm ntawm lub tshuab ua haujlwm raws li qhov muaj txiaj ntsig zoo, dej zoo, thiab kev xav tau aerobic oxygen.

Thaum cov dej khib nyiab thib ob pib dhau mus, ncua ib ntus kev kho cov dej khib nyiab tom ntej (kev kho ua ntej, tshuaj tua kab mob) thiab tso cov dej pov tseg ncaj qha, hla cov txheej txheem no.

Tom qab lub tank kho lom neeg mus txog nws cov dej ua haujlwm li qub, tsis tu ncua saib xyuas cov pa oxygen (DO) concentration (siv cov pa oxygen meter) thiab tshem tawm cov khib nyiab (MLSS) concentration hauv lub tank kho lom neeg los txiav txim seb tus nqi aeration puas txaus thiab kho kom tsim nyog. Thaum lub sij hawm activated sludge acclimation, cov pa oxygen concentration yuav tsum ua raws li cov xwm txheej hauv qab no:

a) Tsawg yaj oxygen concentration nyob rau hauv lub influent thiab rov qab sludge, yuav tsum tau ib tug siab ntawm oxygenation;
b) Anoxic influent, xav tau cov pa oxygen txaus kom hloov pauv sai sai rau hauv ib puag ncig oxygenated;
c) Khoom noj khoom haus- cov dej khib nyiab nplua nuj, yuav tsum muaj cov pa oxygen ntau ntau los txhawb kev loj hlob ntawm microbial.

Thaum lub sij hawm sludge acclimation, qhov tsawg kawg nkaus yaj cov pa oxygen concentration yuav tsum xyuas kom meej tias DO concentration ntawm qhov hluav taws xob effluent ntawm lub tank kho lom tsis tsawg tshaj li 1.0 mg / L.

Nyob rau hauv thawj theem ntawm acclimation, vim qhov tsawg concentration ntawm activated sludge, ib tug loj npaum li cas ntawm biochemical metabolic npuas yuav tsim thaum lub sij hawm aeration. Feem ntau, tsis tas yuav ntsuas kev kho mob, thiab cov npuas dej maj mam txo qis thaum cov kab mob acclimate. Yog tias tsim nyog, kev ntsuas xws li txau cov tee dej tuaj yeem siv los tshem tawm cov npuas dej.

Thaum lub sijhawm no, thaum saib xyuas cov pa oxygen, qhov sib piv ntawm 30 feeb (SV30) thiab cov khoom noj tsis zoo ntawm cov activated sludge yuav tsum tau saib xyuas.

Thaum pib ntawm theem no, cov sludge - dej sib tov xim yog zoo ib yam li cov influent. Raws li aeration txuas ntxiv, particle loj nce, kho qhov kev ua tau zoo, thiab xim maj mam tig xim av. Thaum lub sij hawm no, qhov activated sludge settling ratio tuaj yeem ncav cuag 5-20%.

Kev ntsuam xyuas cov khoom noj kom ntseeg tau tias muaj kev loj hlob ntawm microbial. Thaum lub sij hawm acclimation txheej txheem, BOD: N: P piv yuav tsum tau khaws cia ntawm kwv yees li 100: 5: 1. Yog tias qhov piv txwv no tsis tuaj yeem ua tiav, cov as-ham yuav tsum tau ntxiv los kho nws.

Thaum lub sij hawm no, cov txheej txheem acclimation yog qhov tseem ceeb ua kom tiav. Cov ntsiab lus tseem ceeb ntawm cov sludge- cov dej sib tov raug saib xyuas, txheeb xyuas, thiab sau tseg rau kev siv thaum lub sijhawm ua haujlwm ib txwm ua. Thaum cov activated sludge concentration mus txog qhov kev teev tseg thiab ua kom ruaj khov, cov txheej txheem acclimation tuaj yeem suav tias yog qhov tseem ceeb ua tiav. Tom qab kev kho kab mob lom thiab sedimentation, cov effluent suspended solids yuav tsum ua raws li cov qauv. Tshaj sludge yuav tsum tau tso tawm raws li kev ua haujlwm tiag tiag.

Lub hom phiaj ntawm theem no yog los sau cov kev ua haujlwm tsis zoo, suav nrog cov kev ntsuas tseem ceeb xws li lub tshuab ua kom cov sludge 30-feeb kev sib piv (SV30), biomicroscopic kuaj tau, sludge rov qab piv, thiab tshaj sludge tawm. Qhov no muab cov ntaub ntawv siv rau kev ua haujlwm ib txwm muaj.

Thaum lub influent concentration yog tsawg thiab sludge loj hlob tsis zoo, sludge rov piv yuav tsum tau nce; conversely, thaum sludge bulking tshwm sim, qhov ratio yuav tsum tau txo. Thaum lub sij hawm no thiab thoob plaws hauv ib txwm ua hauj lwm, cov sludge rov qab ratio yuav tsum tau nruj me ntsis tswj. Tsis txaus sludge rov tuaj yeem ua rau:

Kev ua kom tsis txaus sludge los kho cov pa phem, feem ntau tshwm sim 1-2 lub lis piam ua ntej lub kaw lus pib;

Sludge tshuav ntev dhau lawm hauv lub tank sedimentation, ua rau muaj kev cuam tshuam anaerobic, ntab sludge, thiab tsw;

Ib txheej tuab sludge nyob rau hauv lub thib ob sedimentation tank, nce suspended solids nyob rau hauv lub effluent;

Nrog rau cov pa oxygen txaus txaus, nitrification tshwm sim hauv lub tank kho lom neeg, tejzaum nws ua rau denitrification hauv lub tank sedimentation thiab nce sludge ntim.

Tom qab theem plaub thiab ua tiav ntawm cov txheej txheem acclimation, tag nrho cov kev khiav hauj lwm tsis ua hauj lwm ntawm cov activated sludge yuav tsum nyob rau hauv tus tsim tswj ntau yam thiab kuj ruaj khov.