Population equivalent or unit per capita loading, (PE), in waste-water treatment

Industrial wastewater treatment

Industrial wastewater treatment covers the mechanisms and processes used to treat waters that have been contaminated in some way by anthropogenic industrial or commercial activities prior to its release into the environment or its re-use....

 is the number expressing the ratio of the sum of the pollution load

Sewage

Sewage is water-carried waste, in solution or suspension, that is intended to be removed from a community. Also known as wastewater, it is more than 99% water and is characterized by volume or rate of flow, physical condition, chemical constituents and the bacteriological organisms that it contains...

 produced during 24 hours by industrial facilities and services to the individual pollution load in household sewage

Sewage

Sewage is water-carried waste, in solution or suspension, that is intended to be removed from a community. Also known as wastewater, it is more than 99% water and is characterized by volume or rate of flow, physical condition, chemical constituents and the bacteriological organisms that it contains...

 produced by one person in the same time.

For practical calculations, it is assumed that one unit equals to 54 grams of BOD

Biochemical oxygen demand

Biochemical oxygen demand or B.O.D. is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period. The term also refers to a chemical procedure for...

per 24 hours.

{| class="wikitable" border="1"

|+ Population equivalents of wastewater from some industries
|-
! Type
! Activity
! BOD PE
[inhab/(unit/d)]
|-
| Food
| Canning (fruit/vegetables)
| 500
|-
||
| Pea processing
| 85-400
|-
||
| Tomato
| 50-185
|-
||
| Carrot
| 160-390
|-
||
| Potato
| 215-545
|-
||
| Citrus fruit
| 55
|-
||
| Chicken meat
| 70-1600
|-
||
| Beef
| 20-600
|-
||
| Fish
| 300-2300
|-
||
| Sweets/candies
| 40-150
|-
||
| Sugar cane
| 50
|-
||
| Dairy (without cheese)
| 20-100
|-
||
| Dairy (with cheese)
| 100-800
|-
||
| Margarine
| 500
|-
||
| Slaughter house
| 10-100
|-
||
| Yeast production
| 21000
|-
| Confined animals breeding
| Pigs
| 35-100
|-
||
| Dairy cattle (milking room)
| 1-2
|-
||
| Cattle
| 65-150
|-
||
| Horsens
| 65-150
|-
||
| Poultry
| 15-20
|-
| Sugar-alcohol
| Alkohol distillation
| 4000
|-
| Drinks
| Brewery
| 150-350
|-
||
| Soft drinks
| 50-100
|-
||
| Wine
| 5
|-
| Textiles
| Cotton
| 2800
|-
||
| Wool
| 5600
|-
||
| Rayon
| 550
|-
||
| Nylon
| 800
|-
||
| Poliester
| 3700
|-
||
| Wool washing
| 2000-4500
|-
||
| Dyeing
| 2000-3500
|-
||
| Textile bleaching
| 250-350
|-
| Leather and tannaries
| Tanning
| 1000-3500
|-
||
| Shoes
| 300
|-
| Pulp and paper
| Pulp
| 600
|-
||
| Paper
| 100-300
|-
||
| Pulp and paper integrated
| 1000-10000
|-
| Chemical industrial
| Paint
| 20
|-
||
| Soap
| 1000
|-
||
| Petroleum rafinery
| 1
|-
||
| PVC
| 200
|-
| Steelworks
| Foundry
| 12-30
|-
||
| Lamination
| 8-50
|}