How do you calculate aeration rate?

How to calculate Aeration Tank Volume? Hence O2 required 350/0.20 =1750 kg/day. one more point to be consider the Depth of aeration Tank, suppose it is 4 metre depth select 0.5 or 0.6 kg/cm² in blower side.

How do you calculate the volume of a aeration tank?

Example #2: For an assumed aeration tank MLSS of 2100 mg/L and.
Solution: The HRT and F:M ratio can be calculated using the last three.
VMG = V*7.48/1,000,000 = 170,275*7.48/1,000,000 = 1.27 MG.
HRT = 24*VMG/Qo = 24*1.27/3.5 = 8.7 hours.
F:M = (8.34*So*Qo)/(8.34*%Vol*X*VMG) = (175*3.5)/(0.75*2100*1.27)

How is sludge age calculated in aeration tank?

The sludge age of an activated sludge process can be calculated by dividing the pounds of suspended solids or MLSS in the aeration tanks by the pounds of suspended solids that enter the aeration tanks (Equation I. 10).

How is standard aeration efficiency calculated?

Another measure is the Standard Aeration Efficiency or SAE, which is the SOTR divided by power used. The resulting measurement is pounds of oxygen per horsepower per hour of operation.

How do you calculate STP capacity?

Multiply your Minimum Population (P) by 150 to get your daily estimated wastewater production. For example, a three bed house with a Minimum Population (P) of 5 people would have a daily estimated wastewater production of 750 litres per day (5 x 150).

How do you calculate BOD of aeration tank?

BOD (or COD) load: Units: kg/day The concentration of BOD (in mg/l) in the influent can be used to calculate the total BOD load per day being treated. This is simply done by multiplying the BOD in mg/l by the daily effluent volume in cubic metres (m3) and dividing the product by 1000.

What is sludge age formula?

Gould Sludge Age (GSA) The GSA is calculated by dividing the pounds (or kg) of MLSS in the aeration tank by the pounds (or kg) of total suspended solids entering the aeration tank as shown schematically in Figure No. 1.

How is sludge calculated?

Calculation : The daily sludge mass produced = ( 100,000 ) ( 0.080 ) = 8,000 kg dry SS / day. Since 97 % MC is 3 % SC or approximately 30 kg dry SS / m 3 sludge, the daily volume produced is 8,000 / 30 = 267 m 3 .

How big is an activated sludge aeration basin?

Waste activated sludge (WAS) calculations in your plant may be based on data similar to the following: An activated sludge process has three aeration basins. Each basin is 90 feet long, 45 feet wide, and 12 feet deep. The mixed liquor suspended solids (MLSS) concentration is 2,750 mg/L. There are two clarifiers.

How to calculate activated sludge waste water treatment?

The activated sludge operational parameters calculated by the Excel formulas in the spreadsheet are: recycle activated sludge flow rate, Q r; waste activated sludge flow rate, Q w, and aeration tank food to microorganism ratio, F:M. The equations used are as follows: Q r = (X – X o)/ (X w – X) Q w = (8.34* V * X)/ (8.34* SRT * X w)

What happens to activated sludge when it is aerated?

Primary effluent (or plant influent) is mixed with return activated sludge to form mixed liquor. The mixed liquor is aerated for a specified length of time. During the aeration the activated sludge organisms use the available organic matter as food producing stable solids and more organisms.

What are the operational parameters of activated sludge?