ISO/DIS 13610

Sludge recovery, recycling, treatment and disposal — Determination of calorific value of sludge

Scope

This Document specifies a method for the determination of the gross calorific value of sludge at
constant volume and at the reference temperature 25 °C in a bomb calorimeter calibrated by
combustion of certified benzoic acid.
The result obtained is the gross calorific value of the sample at constant volume with both the water of
the combustion products and the moisture of the sludge as liquid water. In practice, sludge are burned
at constant (atmospheric) pressure and the water is not condensed but is removed as vapour with the
flue gases. Under these conditions, the operative heat of combustion to be used is the net calorific
value of the fuel at constant pressure. In this European Standard the net calorific value at constant
volume is described as it requires less additional determinations.
This method is applicable to all kinds of sludge