The control of phenolic pollutants has an important role in protecting humans/animals/environment and it is in line with the European Green Deal’s aims of clean water, healthy soil and biodiversity. The overall goal of the Project is to raise the scientific and innovative excellence in the field of phenolic contaminants removal from wastewater contributing to national and regional scientific and economic growth and well-being. The main objective of BioCompWaterClean implies the utilization of novel bio-functionalized magnetite-geopolymer composites for the removal of phenolic compounds from wastewater. BioCompWaterClean will implement smart biowaste management principles in order to synthesize functionalized composites performing as valuable adsorbents/biocatalysts for wastewater treatment. In line with the principles of green and sustainable chemistry, the synthetic routes will be optimized toward minimization of energy and raw materials consumption. An additional element of the implemented smart biowaste management will include the proposed solution for the disposal of solid waste material remained after water treatment processes by its incorporation into the construction material. Therefore, the development of novel adsorbents/biocatalysts for phenolic wastewater treatment by combining the fundamental knowledge with tools of smart biowaste management will provide new opportunities for the development of modern lines for the purification of municipal and industrial wastewater, as well as the improvement of already existing water treatment systems, all in an attempt to reach zero-waste technology. The knowledge gained within this project will strengthen the scientific capacities of individual institutions and their participants, and by its extensive dissemination the collaboration with interested stakeholders will be intensified. This will create excellent starting conditions toward the establishment of circular economy in the wastewater treatment sector.