Table 1 . Measured variables for feces and urine.

	Feces unit	Urine unit
Variable	of measure	of measure
Generation	g/cap/day	L/cap/day
Frequency of defecation	motions/24 hr	urinations/24 hr
Water content	% total mass	% total mass
Organic composition	% total mass	% dry mass
Components of solids	% total mass	% total mass
Inorganic composition	% dry mass	% dry mass
Daily excretion of elements	g/cap/day	g/cap/day, mg/L
Chemical nature
pH	pH	pH
COD and BOD	mg/g wet mass	mg/L
Physical form
Bristol stool form	Linear scale (1–7)
Diarrhea prevalence	% of population