Further utilization of FBC and SDA by-products have to be improved and investigated, as disposal sites and disposal criteria limit disposal in several countries. In general, standards are set, per emission source, according to plant size, operating mode, combustion technology, fuel type and whether it is a new or existing plant. Efforts to limit the sulphur emissions to the levels set out in the national framework legislation have to be controlled by a permanent monitoring and reporting system and reported to the supervising authorities. Several monitoring systems, using both continuous and discontinuous measurement methods, are available. However, quality requirements vary.
Measurements are to be carried out by qualified institutes using measuring and monitoring systems.
To this end, a certification system can provide the best assurance. In the framework of modern automated monitoring systems and process control equipment, reporting does not create a problem. To obtain better comparability, data sets and prescribing regulations should be harmonized. Harmonization is also desirable for quality assurance of measuring and monitoring systems. This should be taken into account when comparing data.