1. Membrane Fouling
Yog hais tias daim nyias nyias txo qis los yog effluent ua turbid, ib qho kev ntsuam xyuas ntawm pretreatment efficiency, sludge concentration, thiab aeration uniformity yog tsim nyog. Kev tu lossis kho qhov kev ua haujlwm yuav tsum tau ua tam sim kom rov ua haujlwm zoo li qub. Membrane fouling yog ib qho txhaum hauv MBR systems, ua rau txo cov membrane flux thiab deterioration ntawm effluent zoo. Thaum daim nyias nyias fouling tshwm sim, thawj kauj ruam yog los xyuas kom meej lub pretreatment efficiency. Yog tias qhov kev kho ua ntej tsis zoo, cov khib nyiab loj, roj, xuab zeb, thiab lwm yam khoom tuaj yeem nkag mus rau hauv daim nyias nyias, ua rau fouling. Hauv qhov no, kev ua haujlwm ntawm cov khoom siv pretreatment, xws li cov ntxaij vab tshaus, grit chambers, thiab flotation tanks, yuav tsum tau kuaj xyuas kom ntseeg tau tias lawv ua haujlwm zoo thiab tshem tawm cov impurities ntawm cov dej khib nyiab.
Qhov thib ob, cov sludge concentration yuav tsum tau kuaj xyuas. High sludge concentration exacerbates membrane fouling; Yog li ntawd, sludge paug tswj yog xav tau los txo cov sludge concentration. Nyob rau tib lub sijhawm, aeration uniformity yuav tsum tau kuaj xyuas. Tsis sib xws aeration ua rau qhov tsis sib xws ntawm daim nyias nyias ntawm daim nyias nyias, ua rau qee qhov chaw ntawm daim nyias nyias mus ua kom cov kab mob sib kis, ua rau daim nyias nyias fouling. Hauv qhov no, cov txheej txheem thiab kev ua haujlwm ntawm cov kav dej aeration yuav tsum tau hloov kho kom ntseeg tau tias muaj kev sib haum xeeb.
Tom qab kuaj xyuas cov xwm txheej saum toj no, yog tias daim nyias nyias fouling txuas ntxiv mus, kev tu lub sijhawm lossis kev hloov pauv ntawm kev ua haujlwm tsis yog tsim nyog. Txoj kev ntxuav muaj xws li huab cua- dej rov qab ntxuav thiab tshuaj ntxuav; txoj kev tu kom tsim nyog yuav tsum raug xaiv raws li qib ntawm daim nyias nyias fouling. Kho cov kev khiav hauj lwm tsis muaj xws li txo cov membrane flux thiab nce aeration kom txo tau cov membrane fouling.
2. Cov khoom siv daws teeb meem
Tsis sib xws aeration tuaj yeem daws tau los ntawm kev kho qhov teeb tsa ntawm cov kav dej aeration. Rau lub twj tso kua mis ua haujlwm tsis zoo, lubrication thiab tu yuav tsum tau ua kom tsis tu ncua los tiv thaiv kev kaw haujlwm vim muaj teeb meem kev siv tshuab thiab ua kom cov khoom siv ruaj khov. Tsis sib xws aeration yog ib qho ntawm cov khoom siv ua haujlwm tsis zoo thaum lub sijhawm ua haujlwm MBR. Tsis sib xws aeration ua rau qhov tsis sib xws ntawm daim nyias nyias ntawm daim nyias nyias, ua rau qee qhov chaw ntawm daim nyias nyias mus ua kom cov kab mob sib kis, ua rau daim nyias nyias fouling. Tsis sib xws aeration kuj cuam tshuam rau microbial kev loj hlob thiab metabolism, txo cov kev kho mob lom.
Txhawm rau daws qhov teeb meem ntawm qhov tsis sib xws ntawm aeration, qhov teeb tsa ntawm cov kav dej aeration tuaj yeem hloov kho. Qhov kev teeb tsa ntawm cov kav dej aeration yuav tsum tsim nyog kom ntseeg tau tias muaj kev sib haum xeeb. Piv txwv li, annular aeration los yog porous aeration txoj kev yuav siv tau los ua kom cov uniformity ntawm aeration. Nyob rau tib lub sijhawm, qhov kev ua haujlwm ntawm cov kav dej aeration yuav tsum tau kuaj xyuas tsis tu ncua, thiab cov blockages yuav tsum tau muab tshem tawm sai sai kom ntseeg tau tias cov aeration zoo li qub.
Cov twj tso kua mis tsis ua haujlwm kuj yog ib qho khoom siv tsis ua haujlwm thaum lub sijhawm ua haujlwm ntawm MBR systems. Cov twj tso kua mis muaj kev cuam tshuam rau cov neeg kho tshuab hnav thiab corrosion thaum ua haujlwm, ua rau lawv ua haujlwm tsis zoo. Txhawm rau tiv thaiv kev poob qis vim lub twj tso kua mis tsis ua haujlwm, lub tshuab lubrication tsis tu ncua thiab kev saib xyuas cov twj tso kua mis yog tsim nyog. Lubrication thiab kev saib xyuas tuaj yeem txo cov neeg kho tshuab hnav thiab txuas ntxiv lub neej kev pabcuam ntawm cov twj. Nyob rau tib lub sijhawm, kev ua haujlwm ntawm cov twj tso kua mis yuav tsum tau kuaj xyuas tsis tu ncua txhawm rau txheeb xyuas tam sim thiab daws cov teeb meem uas muaj peev xwm.