Tính toán công nghệ SBR trong xử lý nước thải

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Tên dự án

Địa điểm

Chủ đầu tư

Nhà thầu

Người thiết kế

Ngày tính toán

INFLUENT

Q (m³/d)

Temperature (°C)

BOD5 (mg/l)

COD (mg/l)

TSS (mg/l)

TKN (mg/l)

T-P (mg/l)

Alkalinity (mg/l as CaCO₃)

INFLUENT PARAMETERS

NH4-N (mg/l)

bCOD (mg/l)

rbCOD (mg/l)

nbVSS (mg/l)

iTSS (mg/l)

VSS (mg/l)

KINETICS

Heterotrophic Organisms at 20°C

Max specific growth rate (gVSS/gVSS.day)

Yield Biomass (gVSS/gbCOD)

Ks (gbCOD/m³)

Kd (gVSS/gVSS.day)

fd (unitless)

Temperature Coefficient MSGR

Temperature Coefficient Kd

Temperature Coefficient Ks

Autotrophic Nitrification Organisms at 20°C

Max specific growth rate (gVSS/gVSS.day)

Yield Biomass (gVSS/g NH4-N)

Kn (gNH4-N/m³)

Ko (g/m³)

Kdn (gVSS/gVSS.day)

fdn (unitless)

Temperature Coefficient MSGRn

Temperature Coefficient Kn

Temperature Coefficient Kdn

KINETICS OUTPUT

Heterotrophic Organisms at T°C

Max specific growth rate (gVSS/gVSS.day)

Yield Biomass (gVSS/gbCOD)

Ks (gbCOD/m³)

Kd (gVSS/gVSS.day)

fd (unitless)

Autotrophic Nitrification Organisms at T°C

Max specific growth rate (gVSS/gVSS.day)

Yield Biomass (gVSS/g NH4-N)

Kn (g NH4-N/m³)

Ko (g/m³)

Kdn (gVSS/gVSS.day)

fdn (unitless)

Specific grow rate (gVSS/gVSS.d)

Safe Factor (TKN peak/TKN)

Aerobic Sludge Age θ_XA (d)

Net Autotrophic Yield Y_NA (gVSS/gVSS)

Net Autotrophic Yield with cell-debris Y_NAE (gVSS/gVSS)

Anoxic Phase Time/Cycle Time & Nitrogen Blance

T_AOX/ T_P Ratio

Effective Sludge Age θ_XE (d)

Net Hertetrophic Yield Y_NH

Net Hertetrophic Yield with Cell-debris Y_NHE

Hertetrophic Biomass (g/d)

Autotrophic Biomass (g/d)

N in biomass N_X(g/m³)

N oxidied N_OX (g/m³)

Substrate utilization rate coefficient under Anoxic conditions

Potential Denitrification N_DP (g/m³)

N_DP/N_OX

Select cycle and calculate solids mass

Internal recirculation ratio R

End-of-cycle nitrate S_NO (g/m³)

Denitrified nitrogen N_D (g/m³)

Biomass production P_XVSS (g/d)

Biomass production P_XTSS (g/d)

Cycle time T_C (h)

Settle–Draw–Idle time T_S,D,I (h)

Process time T_P (h)

Overall sludge age θ_X (d)

Solids mass in reactor M_XT (g)

SVI (mL/g)

X_S (g/m³)

Volume after decant V₀ (m³)

Fill volume V_F (m³)

Ratio V₀/V_F

Reactor volume V_T (m³)

End-of-cycle solids concentration X_T (g/m³)

Hydraulic retention time HRT (h)

Alkalinity requirement calculation

Influent alkalinity (g CaCO₃/m³)

Alkalinity for nitrification (g CaCO₃/m³)

Alkalinity to maintain pH 6.8–7.0 (g CaCO₃/m³)

Alkalinity recovered from denitrification (g CaCO₃/m³)

Supplemental alkalinity required (g CaCO₃/m³)

Supplemental alkalinity mass (g CaCO₃/d)

Oxygen requirement calculation

Oxygen for COD oxidation (kg/d)

Oxygen for nitrification (kg/d)

Oxygen credit from denitrification (kg/d)

Safety factor

Total oxygen required (kg/d)

System oxygen uptake rate (kg/m³·cycle·h)

CALCULATE SOTR

Relative transfer rate to clean water (α)

Diffuser fouling factor (f)

Relative DO saturation to clean water (β)

Elevation above sea level (m)

Operating DO in basin (mg/L)

Aeration basin temperature T (°C)

Diffuser submergence depth (m)

Standard oxygen transfer rate, SOTR (kg/h)

Standard oxygen transfer efficiency, SOTE (%)

Air flowrate (m³/min·cycle)

SBR CONFIGURATION (FROM CALCULATION RESULTS)

Total V_t of all tanks (m³)

Number of SBR tanks

V_t per tank (m³)

V₀ – volume at start of cycle (m³)

Vf – fill/decant volume per cycle (m³)

T_aox – Anoxic + fill period (h)

T_ae – Aerobic period (h)

T_s+d+i – Settle + decant + idle (h)

T_s – Settling time (h)

T_d – Decant time (h)

Decanter capacity (m³/h)

Mixing energy in anoxic phase (W/m³)

Mixing power per SBR tank (kW)

Air flowrate per SBR tank (m³/min·cycle)

Waste sludge volume (decant phase) (m³/cycle)

BUFFER TANK & FEED PUMP

Average hourly flow Q (m³/h)

Flow pumped to SBR during FILL (m³/h)

V_Buffer,min – minimum working volume (m³)

V_{Buffer,design} – design volume (m³)

Tính toán công nghệ SBR trong xử lý nước thải

Thiết kế, cải tạo & tối ưu vận hành hệ thống xử lý nước thải

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Tính toán công nghệ SBR trong xử lý nước thải

Thiết kế, cải tạo & tối ưu vận hành hệ thống xử lý nước thải