CEST Proceedings are published under the ISSN 2944-9820.
A simple and flexible flowsheet process for recycling efficiently and selectively metals from spent fluid cracking catalysts
(Corresponding) Soares H., (Corresponding) Sadeghi M., (Corresponding) Jesus J., (Corresponding) Pinto E., (Corresponding) Almeida A.
Topic:
Solid waste management
Fluid cracking catalysts (FCCs) are used in the oil industry to crack large molecules into smaller hydrocarbons of interest, such as gasoline and other products. Considering the large volume of FCCs waste generated on a yearly basis (about 20 thousand tons of spent FCCs worldwide) as well as its...Read more
Keywords:
Fluid cracking catalysts, simple and nearly-closed process, recovery of La, recovery of Al
An innovative and eco-friendly approach to recover gold (and copper) from gold fingers of waste printed circuit boards
Sousa P., Martelo L., Bastos M., Marques A., (Corresponding) Soares H.
Topic:
Sustainable supply of raw materials
Recycling waste printed circuit boards (WPCBs) is a complex problem worldwide and sustainable technologies are required. So, this work aims to offer an innovative (an European patent was submitted, EP 20216239.2 1) and more sustainable solution to recover high-value materials (gold and copper) from...Read more
Keywords:
E-waste, Printed circuit board recycling, Physical and chemical processes; Gold and copper recovery.
Evaluation of Pressure-Driven Membrane Processes for Nutrients Recovery from Dilute Effluents
Tsaridou C., Karanasiou A., (Corresponding) Plakas K., Karabelas A.
Topic:
Circular economy and industrial symbiosis
Results are presented from an ongoing R&D project, aiming at full utilization of dairy-industry effluents. Development of a membrane-based method is pursued, for treatment of digestate (after fermentation yielding bio-gas) to recover nutrients (N-NH4, P-PO4) and water for reuse/recycling or...Read more
Keywords:
nanofiltration, ultra-low-pressure reverse osmosis, dairy industry effluents, anaerobic digestate, ammonium and phosphorous recovery
A PRELIMINARY INVESTIGATION ON THE ACCEPTANCE OF THE USE OF URINE BASED FERTILIZERS: A COMPERATIVE SURVEY WITH FARMERS AND ENVIRONMENTAL ENGINEERS
OZKAN E., (Corresponding) AKDAG Y., BELER-BAYKAL B.
Topic:
New solutions for a better and sustainable agriculture
Source separated human urine, a highly concentrated solution of nutrients, may be recycled directly or indirectly for further use as fertilizer. While environmental engineers (EnvE) recommend and set the fundamentals of this practice for valorizing a wastewater stream, farmers are the immediate...Read more
Keywords:
source separated human urine, fertilizer, nutrient recovery/recycling, acceptance of farmers and environmental engineers as occupational groups, Ecological Sanitation (ECOSAN)
