Opätovné získavanie fosforu úpravou čistiarenského kalu
Due to increasing phosphorus (P) consumption it is necessary to investigate its secondary sources. Sewage sludge and sewage sludge ash (SSA) from WWTPs contain a significant amount of P and therefore we can consider them as possible alternative sources. Up to now, many technologies have been developed to P recovery from sewage sludge or SSA. Considering to their complexity most of the technologies have been tested only under laboratory or pilot scale. This article informs about possibilities of P recovery and discusses further research.