Core Classification thiab Functions of Water Treatment Structures
Cov qauv kev kho dej ua haujlwm ua cov hlab ntsha hauv lub cev rau kev kho lossis ntxuav cov dej khib nyiab. Raws li cov txheej txheem kev kho mob tshwj xeeb ua haujlwm, lawv tuaj yeem faib dav rau hauv peb hom hauv qab no:
Cov qauv kho lub cev: Cov no tshem tawm impurities los ntawm lub cev txhais tau tias xws li lub ntiajteb txawj nqus, tshuaj ntsuam xyuas, thiab pom. Piv txwv li:
Cov ntxaij vab tshaus/Grit Racks: Tsim los cuam tshuam cov khib nyiab loj; Qhov sib nrug ntawm cov tuav feem ntau yog li ntawm 5 txog 20 hli (raws li *Standard for Design of Outdoor Drainage* [GB50014-2021]).
Grit Chambers: Tsim los tshem tawm cov xuab zeb loj dua 0.2 hli, nrog lub sijhawm hydraulic khaws cia li ntawm 30 txog 60 vib nas this.
Sedimentation Tanks: Muab faib ua kab rov tav- hom ntws (nrog rau qhov chaw thauj khoom ntawm 1.0–3.0 m³ / (m²·h)) thiab ntsug- hom ntws (nrog rau qhov siab tshaj tawm ntawm 0.3–0.5 mm / s).
Cov Khoom Siv Tshuaj Kho Mob: Cov no suav nrog cov coagulation tso tsheb hlau luam (suav nrog kev sib ntxiv ntawm cov coagulants xws li PAC / PAM) thiab cov tshuaj tua kab mob (yuav tsum muaj cov tshuaj chlorine tiv tauj ntau dua lossis sib npaug li 30 feeb), thiab lwm yam.
Cov qauv kev kho mob lom neeg: Piv txwv suav nrog aeration tanks siv nyob rau hauv cov txheej txheem activated sludge (feem ntau tuav cov sludge concentration ntawm 2,000–4,000 mg/L) thiab biofilters (ua haujlwm nrog tus nqi thauj khoom ntawm 0.1–0.4 kg BOD₅/m³·d).
Tsim thiab nthuav kev siv ntawm cov qauv tsim
High -Kev ua tau zoo txawv ntawm cov lim tank:
V-Cov Lim Lim: Cov yam ntxwv los ntawm kev pom tus nqi ntawm 6-10 m / h thiab rov qab siv zog ntawm 15 L / (m²·s).
Activated Carbon Filters: Siv cov pa roj carbon activated nrog iodine tus nqi ntau dua lossis sib npaug li 1,000 mg / g; feem ntau yog siv rau kev kho dej siab tshaj (tertiary).
Membrane Treatment Units: Feature ultrafiltration membranes nrog pore qhov ntau thiab tsawg ntawm 0.01 txog 0.1 μm thiab flux tus nqi ntawm 50-100 LMH (litres ib square meter ib teev).
Cov Txheej Txheem Siv Cov Txheej Txheem Tshaj Tawm: Piv txwv suav nrog cov av ntub dej (ua haujlwm nrog cov khoom siv hydraulic ntawm 5-10 cm / d) thiab cov sib nqus sib nqus tso tsheb hlau luam (siv lub zog sib nqus ntawm 0.5-1.0 T).
Cov Txheej Txheem Xaiv thiab Cov Txheej Txheem Txheej Txheem rau Cov Txheej Txheem
Cov ntaub ntawv tseem ceeb raug xa mus los ntawm * Phau Ntawv Qhia Txog Kev Siv Dej thiab Kev Tsim Kho Dej * thiab EPA cov qauv; piv txwv:
Nto loading tus nqi rau theem nrab sedimentation tso tsheb hlau luam: 0.6-1.2 m³ / (m²·h) rau cov txheej txheem activated sludge;
Rau cov txheej txheem AAO, Hydraulic Retention Time (HRT) yog 1-2 teev nyob rau hauv cheeb tsam anaerobic thiab 4-8 teev hauv thaj chaw aerobic.
Rau qhov tseeb engineering tej yaam num, tus tsim yuav tsum tau kho raws li cov yam ntxwv zoo dej (xws li, intensified pretreatment yuav tsum tau thaum COD tshaj 300 mg / L).
