Employing process exhausts from steps I and III as oxygen sources yields the additional benefit of effectively treating effluent ozone contained in those streams, as ozone, which is hazardous to human health, readily decomposes to oxygen at elevated temperatures. The direct emissions of the thermal treatment of organic wastes and ozone were calculated per kg product produced from each process step, and are given in Table . Non-specific process emissions and consumed auxiliaries of thermal waste treatment were estimated from the multi-input allocation model for thermal treatment of waste solvents presented by Seyler et al., wastes generated by the paracetamol process. As it was assumed that all aqueous waste streams would be mixed before treatment, the average wastewater properties of the combined aqueous process wastes were determined, which are given in Table .