Environmental Technology ChimH409 (2-0-1) Michel Verbanck 2012 Universite Libre de Bruxelles Bruface Dept Water Pollution Control

Course structure Part 1. Introduction (incl. generic methods) Part 2. Air pollution control engineering Part 3. Water & wastewater treatment Part 4. Solid and hazardous wastes

Part 2. Air pollution control engineering Gaseous Particulates

Henry's Law states that the amount of a gas that dissolves into a liquid is proportional to the partial pressure that gas exerts on the surface of the liquid. where, C A = concentration of A, [mol/L] K H =equilibrium constant (Henry's Law constant), [mol/L-atm] p A =partial pressure of A, [atm]

Packed Bed Scrubber

Impingement separators (impactors)

LbLb LcLc

Electrostatic Precipitator (ESP)

Design of Electrostatic Precipitators The efficiency of removal of particles by an Electrostatic Precipitator is given by η = fractional collection efficiency w = electrokinetic velocity (drift velocity), m/s. A = available collection area, m 2 Q = volumetric flow rate m 3 /s

In practice, on a real industrial site: What are the characteristic removal efficiencies for each implemented step ? [refer also to the technical visit at Brussels-Energy incineration plant]

poor ! excellent