## How is bod pound day calculated?

Pounds of BOD per day per acre or pounds BOD divided by acres. Using the pounds formula to find pounds of BOD — 8.34 (constant) x . 38 mgd (flow) x 220 mg/L (BOD concentration) — your answer should be 697 pounds BOD/day.

**What is 8.34 in water treatment?**

The FLOW is what is coming into the plant or or from the primary clarifier and will be presented as MGD. 8.34 is always there – it is my conversion, it is a constant. * The bottom of this formula is talking about what is currently UNDER aeration (what is already in my aeration basin).

### How do you calculate detention time?

The simplest way to calculate detention time is to divide the volume of the container by the flow rate into the container. The theoretical detention time of a container is the same as the amount of time it would take to fill the container if it were empty.

**What is the formula for mg L?**

as grams per 1,000 liters, which may be converted to mil- ligrams per liter (mg/L). Therefore, 1 g/m3 = 1 mg/L = 1 ppm. Likewise, one milligram per cubic meter (mg/m3) is the same concentration in water as one microgram per liter (ug/L), which is about 1 ppb.

## How is COD load calculated?

BOD (or COD) load: Units: kg/day 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.

**How is dry 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 .

### What is the pounds formula in wastewater?

Most operators in the water industry have put to memory the “Pound Formula” by multiplying the flow or volume of water in MG or MGD by 8.34 pounds per gallon and then by the dosage in ppm, the pounds of chlorine needed is calculated.

**What unit is MGD?**

Annex 4 Table of conversion factors for metric and english units

U.S. Customary | U.S. Customary or Metric |
---|---|

1 gpm (gallon per minute) | = 3.7854 l/min (liters per minute) |

= 0.063090 l/s (liters per second) | |

1 mgd | = 694.44 gal/min |

= 1.5472 ft3/s |

## What is detention period?

Detention period is defined as the time for which the water was in the tank. And overflow rate is the velocity with which the tank fills.

**How do you convert mg L to LBS?**

- Dosage, mg/l = (Demand, mg/l) + (Residual, mg/l)
- (Gas) lbs = Vol, MG x ppm or mg/L x 8.34 lbs/gal.
- HTH Solid (lbs) =
- (Vol, MG) x (ppm or mg/L) x 8.34 lbs/gal.
- Liquid (gal) = (Vol, MG) x (ppm or mg/L) x 8.34 lbs/gal.

### How do you convert mg L to mg kg?

If you know the density of the solution expressed in kg/l, you can divide your value in mg/l by the density so that (mg/l) / (kg/l) results in a value in mg/kg.