Sewage Discharge Given Oxygen Demand And Ultimate Bod Both Calculator

Formula Used:

\[ Q_{od} = \frac{\frac{BOD_5}{BOD_u} \times (O_r + (D_{O2} \times Q_w \times X_R))}{Q_i - Q} \]

5 Days BOD:

kg/m³

Ultimate BOD:

kg/m³

Oxygen Required:

kg/s

Oxygen Demand of Biomass:

Volume of Wasted Sludge per day:

m³/s

MLSS in Returned or Wasted Sludge:

kg/m³

Influent BOD:

kg/m³

Effluent BOD:

kg/m³

Sewage Discharge given Oxygen Demand:

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1. What is Sewage Discharge given Oxygen Demand?

Sewage Discharge given Oxygen Demand is a measure used to determine the volume of sewage that can be discharged based on its oxygen demand and the ultimate Biochemical Oxygen Demand (BOD). It helps in assessing the environmental impact of wastewater discharge.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q_{od} = \frac{\frac{BOD_5}{BOD_u} \times (O_r + (D_{O2} \times Q_w \times X_R))}{Q_i - Q} \]

Where:

\( Q_{od} \) — Sewage Discharge given Oxygen Demand (m³/s)
\( BOD_5 \) — 5 Days BOD (kg/m³)
\( BOD_u \) — Ultimate BOD (kg/m³)
\( O_r \) — Oxygen Required (kg/s)
\( D_{O2} \) — Oxygen Demand of Biomass
\( Q_w \) — Volume of Wasted Sludge per day (m³/s)
\( X_R \) — MLSS in Returned or Wasted Sludge (kg/m³)
\( Q_i \) — Influent BOD (kg/m³)
\( Q \) — Effluent BOD (kg/m³)

Explanation: This formula calculates the sewage discharge capacity based on oxygen demand parameters and BOD levels in wastewater treatment systems.

3. Importance of Sewage Discharge Calculation

Details: Accurate calculation of sewage discharge is crucial for environmental protection, regulatory compliance, and designing efficient wastewater treatment systems that minimize ecological impact.

4. Using the Calculator

Tips: Enter all required parameters with appropriate units. Ensure Influent BOD is greater than Effluent BOD for valid calculation. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BOD5 and Ultimate BOD?
A: BOD5 measures oxygen demand over 5 days, while Ultimate BOD represents the total oxygen required for complete decomposition of organic matter.

Q2: Why is oxygen demand important in sewage discharge?
A: Oxygen demand indicates the pollution load and helps determine the treatment required before discharge to prevent oxygen depletion in receiving waters.

Q3: What factors affect sewage discharge calculations?
A: Treatment efficiency, biomass characteristics, oxygen requirements, and regulatory standards all influence discharge calculations.

Q4: How accurate is this calculation method?
A: This method provides a reliable estimate for planning purposes, but actual field conditions may require adjustments based on specific treatment plant performance.

Q5: Can this calculator be used for industrial wastewater?
A: While the principles are similar, industrial wastewater may require additional parameters and considerations due to different pollutant characteristics.