TOWARDS CONTROLLING DIOXINS EMISSIONS FROM POWER BOILERS FUELED WITH SALT-LADEN WOOD WASTE

An evaluation of the dioxins emissions from a power boiler fuelled wit h salt-laden wood waste has provided insights on potential control tec hnologies. Whereas a reduction in stack particulate levels does not pr eclude a corresponding reduction in dioxins emissions, good combustion conditions, in combination with an efficient secondary collection dev ice for particulate removal, were found to offer effective control (st ack emissions of 0.064 to 0.086 ng TEQ/m(3)). Regarding minimization o f dioxins formation at source, a preliminary assessment of the possibl e beneficial effect of an attenuated chlorine:sulphur ratio was encour aging. A more accurate assessment requires additional trials, preferab ly longer in duration, to eliminate any possible memory effects. Crown copyright (C) 1997 Elsevier Science Ltd.