Deteriorating settling kev ua tau zoo ntawm activated sludge yog ib qho ntawm cov laj thawj rau sludge turnover nyob rau hauv lub thib ob settling tso tsheb hlau luam. Qhov deterioration no yog tshwm sim los ntawm cov hauv qab no:
1. Tsis txaus Load
Qhov no ua rau muaj BOD tsawg heev -sludge load hauv bioreactor. Cov kab mob hauv cov kab mob activated sludge, tsis muaj cov as-ham, ua rau nws tus kheej - oxidation, ua rau cov flocs poob lawv cov adsorption thiab flocculation zog, ua rau cov sludge bulking thiab ua haujlwm tsis zoo.
2. Cov tshuaj muaj kuab lom muaj tshuaj lom
Flocs yuav tawg mus rau ntau qhov sib txawv, thaum kawg ua rau kev tawg ntawm cov sludge flocs thiab qhov txo qis hauv kev ua haujlwm ntawm sludge.
3. Tus nqi pH ntau dua 9 lossis tsawg dua 6
Nyob rau hauv cov ntaub ntawv no, kev soj ntsuam piv piv feem ntau qhia tau hais tias qeeb activated sludge settling, turbid supernatant, thiab txawm floating activated sludge flocs rau saum npoo.
4. Ntau dhau kev ua pa hauv thaj chaw Aerobic
Tshaj- aeration tuaj yeem ua rau cov activated sludge tawg lossis txawm tias pib ua haujlwm - oxidation, ua rau nws nyuaj rau cov activated sludge kom daws sai sai tom qab nkag mus rau hauv lub tank thib ob.
5. Ua kom Sludge Concentration
Txhawm rau kom muaj kev ua haujlwm zoo thaum lub caij ntuj no, cov chaw kho dej khib nyiab feem ntau ua rau kom cov sludge concentration ua ntej. Txawm li cas los xij, raws li cov sludge concentration nce, nws qhov kev daws teeb meem sai sai poob.
6. Cov kab mob Filamentous loj heev
Cov activated sludge dhau los ua xoob, nws qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom.
7. Cov dej kub tsawg
Cov dej kub qis inhibits cov haujlwm ntawm cov kab mob flocs, uas ua rau tsis zoo sludge daws kev ua haujlwm. Tsis tas li ntawd, nyob rau hauv qis- ib puag ncig qhov kub thiab txias, kev ua haujlwm microbial txo qis, lub sij hawm yuav tsum tau decompose organic teeb meem nce, thiab lub sij hawm ua kom tiav cov av thiab sludge- dej sib cais yog ntev, ua rau qeeb sludge nyob rau hauv lub thib ob settling tank.
