Population equivalent

Population equivalent or unit per capita loading, (PE), in waste-water treatment is the number expressing the ratio of the sum of the pollution load produced during 24 hours by industrial facilities and services to the individual pollution load in household sewage produced by one person in the same time.
For practical calculations, it is assumed that one unit equals to 54 grams of BOD per 24 hours.^[1]

$PE =\dfrac{BOD\ load\ from\ industry\ \left [\dfrac{kg}{day}\right ]}{0.054\ \left [\dfrac{kg}{inhab \cdot day}\right ]}$

Population equivalents of wastewater from some industries^[2]

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
	Horses	65-150
	Poultry	15-20
Sugar-alcohol	Alcohol distillation	4000
Drinks	Brewery	150-350
	Soft drinks	50-100
	Wine	5
Textiles	Cotton	2800
	Wool	5600
	Rayon	550
	Nylon	800
	Polyester	3700
	Wool washing	2000-4500
	Dyeing	2000-3500
	Textile bleaching	250-350
Leather and tanneries	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 refinery	1
	PVC	200
Steelworks	Foundry	12-30
	Lamination	8-50

References

1. In Poland BOD₅ of 1 person = 60g O₂/day (Central Statistical Office, Poland)
2. Marcos von Sperling; Carlos Augusto de Lemos Chernicharo (2005). Biological wastewater treatment in warm climate regions, vol. 1. IWA Publishing. p. 72. ISBN 978-1-84339-002-2. Cite uses deprecated parameter |coauthors= (help)