Nrog rau kev loj hlob thoob ntiaj teb tseem ceeb ntawm cov peev txheej dej sustainability thiab kev tiv thaiv ib puag ncig, kev siv thev naus laus zis kho dej khib nyiab tau dhau los ua ib qho tseem ceeb ntawm cov khoom siv niaj hnub hauv nroog thiab kev lag luam. Kev kho dej khib nyiab tsis yog ib qho kev ua haujlwm -kauj ruam tab sis yog ib qho kev tsim qauv, ntau-theem purification txheej txheem. Cov txheej txheem no feem ntau muab faib ua peb theem tseem ceeb, txhua lub hom phiaj tshwj xeeb ntawm cov pa phem nyob rau hauv ib ntu zuj zus los xyuas kom meej tias cov dej ntws tawm los yog rov siv dua zaum kawg ua tau raws li cov qauv nruj.
► Kev Kho Mob Tseem Ceeb: Cov kauj ruam hauv paus rau kev tshem tawm cov khoom
Kev kho mob thawj zaugyog qhov pib ntawm tag nrho cov txheej txheem dej khib nyiab, nrogNws lub hom phiaj tseem ceeb yog qhov kev sib cais ntawm cov khib nyiab los ntawm cov kua los ntawm kev siv lub cev. Cov dej khib nyiab nyoos nkag mus rau hauv qhov chaw kho mob thawj zaug ntws losib tug bar screen system. Cov txheej txheem no ua lub lim dej loj los cuam tshuam cov khoom pov tseg loj xws li lub raj mis yas, cov ntaub, thiab cov ceg ntoo, tiv thaiv lawv los ntawm kev txhaws lossis ua rau cov twj thiab cov kav dej hauv cov chaw kho mob tom ntej.
Tom qab ntawd, cov dej khib nyiab nkag musib tug grit chamberqhov twg qhov khiav ceev yog txo, cia cov denser inorganic hais (xws li xuab zeb thiab gravel) los ntawm lub ntiajteb txawj nqus. Tom qab kev soj ntsuam ua ntej thiab tshem tawm grit, cov dej khib nyiab tau coj mus rau hauvib tug thawj clarifier. Ntawm no, cov dej ntws tau qeeb zuj zus ntxiv, muab sijhawm txaus rau cov khoom siv hluav taws xob tshem tawm los daws teeb meem, tsim qhov hu ua thawj sludge. Kev kho mob tseem ceeb txo qis cov ntsiab lus tshem tawm ntawm cov dej khib nyiab, yog li txo cov load ntawm cov theem tom ntej, ntau txoj kev kho kab mob lom. Nws yog ib qho tseem ceeb ua ntej pretreatment kauj ruam uas ua kom muaj kev ruaj ntseg ntawm tag nrho cov system.
► Kev Kho Mob Thib Ob: Lub Ntsiab Tseem Ceeb ntawm Kev Ua Kom Zoo
Tom qab kev kho thawj zaug, cov dej khib nyiab tseemmuaj ntau cov organic yaj thiab qee cov tshuaj colloidal, uas yog lub hom phiaj tseem ceeb rau kev tshem tawm hauv kev kho mob theem nrab.Kev kho mob thib ob, feem ntau hu ua kev kho mob lom neeg, qhov tseem ceeb yog ua raws li tus kheej thiab txhim kho tus kheej ntawm tus kheej - cov txheej txheem huv hauv dej, siv cov kev ua haujlwm metabolic ntawm cov kab mob kom txo qis cov pa phem no.
Tam sim no, feem ntau siv tshuab kho mob thib ob yogcov txheej txheem activated sludge thiab nws cov hloov kho ntau yam.Lub hauv paus ntawm txoj kev no yog qhovaeration tank, qhov twg oxygen tau muab los cog qoob loo loj ntawm cov neeg ua haujlwm sludge flocs uas muaj cov kab mob, protozoa, thiab lwm yam kab mob. Cov kab mob no siv cov organic teeb meem hauv cov dej khib nyiab ua "khoom noj," ua rau cov pa roj carbon dioxide, dej, thiab cov kab mob tshiab. Cov sib tov ces ntws mus rau hauvib tug thib ob clarifier,qhov twg cov activated sludge settles thiab cais los ntawm cov dej kho. Feem ntau ntawm cov sludge no yogrov qab mus rau lub aeration tankkom tswj tau cov microbial concentration, thaum ib qho me me ntawm cov sludge ntau dhau raug tshem tawm ntawm lub cev rau kev ua haujlwm ntxiv. Cov txheej txheem oxidation ditch, kev hloov pauv ntawm cov txheej txheem activated sludge, yog txaus siab rau nws cov txheej txheem yooj yim ntws, kev ua haujlwm ruaj khov, thiab muaj zog tiv thaiv kev poob siab. Ntxiv thiab,txheej txheem biofilmyog lwm txoj kev kho mob tseem ceeb thib ob. Nyob rau hauv txoj kev no, cov kab mob txuas mus rau saum npoo ntawm cov xov xwm tshwj xeeb los ua ib qho biofilm. Raws li cov dej khib nyiab ntws los ntawm qhov chaw no, cov pa phem yog adsorbed thiab degraded los ntawm biofilm.
► Kev Kho Mob Thib Ob: Kev polishing Advanced rau siab -Cov kua dej zoo
Kev kho mob tertiary, kuj hu uakev kho mob siab heev,sawv cev rau qib siab tshaj ntawm kev lim dej pov tseg. Nws tsis yog tus qauv zoo hauv txhua qhov chaw kho mob thiab feem ntau yog ua haujlwm thaum cov dej ntws tawm yuav tsum ua kom tau raws li cov kev cai tshwj xeeb tso tawm lossis npaj rau cov peev txheej rov qab thiab rov siv dua. Nws lub hom phiaj yogkom tshem tawm cov kuab paug tshwj xeeb uas nyob tom qab kev kho mob thib ob kom tsim tau cov dej zoo heev -.Cov thev naus laus zis siv nyob rau theem no muaj ntau haiv neeg thiab tsom mus rau ntau yam. Piv txwv li, txhawm rau tiv thaiv eutrophication ntawm dej lub cev, nitrogen thiab phosphorus tshem tawm yog tsim nyog. Qhov no tuaj yeem ua tiav los ntawmoptimizing cov txheej txheem kho biological (xws li cov txheej txheem A2 / O) lossis los ntawm kev ntxiv cov tshuaj lom neeg. Rau qee qhov recalcitrant taug qab organic pollutants, txoj kev nyiamqhibcarbon adsorptionlos yogCov txheej txheem oxidation siab heev (AOPs)tuaj yeem siv rau lawv tshem tawm. Yog tias cov dej kho tau npaj rau kev tsim khoom lag luam lossis tshwj xeeb hauv nroog tsis yog- siv tau, nws yuav xav taumembrane filtration technologies (xws li rov qab osmosis)tshem tawm cov ntsev yaj thiab txawm tias me me. Thaum kawg, kev tua kab mob yog ib kauj ruam tseem ceeb los xyuas kom muaj kev nyab xeeb ntawm dej. Qhov no feem ntau ua tiav siv txoj hauv kev xws li ultraviolet (UV) hluav taws xob, ozonation, lossis chlorination kom tua cov kab mob pathogenic thiab kab mob hauv dej, ua kom cov dej ntws tawm raws li cov qauv kev noj qab haus huv. Cov dej uas tau ua tiav kev kho mob tuaj yeem siv tau zoo nyob rau hauv ntau yam kev siv, suav nrog kev ua kom txias, kev tsim kho hauv nroog, kev ntxuav kev, thiab txawm tias ecological replenishment, ua ib qho tseem ceeb lav rau kev ua tiav cov peev txheej dej.