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Faculty of Polymer Technology is the only one in South East Europe offering holistic study programs in polymer technology, covering all aspects: Chemistry and Materials Science, Design and Simulation, Processing, Characterization of polymer materials and Applications.

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Wednesday, November 25, 2020

Start Circles pilot project for reuse of mineralised sewage sludge

Sewage sludge occurs in wastewater treatment process, regardles the wastewater technology applied. It presents up to 40% of wastewater treatment costs and therefore impacts every household water bill.

Sludge drying reed beds are a natural technology for sludge mineralisation, dewatering and stabilisation. The main benefits of the technology is its' low energy consumption and low operating costs. The technology is GHG emission-free. The case was contributed by LIMNOS Ltd.

The material obtained is humus, but in case of heavy metal containment, the material can be recycled for bioplastics.

Within the project the partner Faculty of polymer technology developed a biocomposite with recycled polypylen as matrix material and characterized it to see whether it could be used for parts for the water treatment process and with this close the waste circle.

For the compatibilization of humus into thermoplastic matrix the recycled polypropylene was chosen. To achive good distribution of humus inside the composite and also to prevent thermal and oxidative degradation lubricant, antioxidant and compatibilizer were added. Tests were done with addition of 15 wt.% and 30 wt.% of humus into the composite. The stiffness rise for 2 % and 13 %, the strength decreases for 15 % and 21 %, also the elongation at break decreases for 79 % and 87 % for the composites with 15 wt.% and 30 wt.% of humus respectively.

The sewage sludge can be used as filler for thermoplastic matrix for the static loaded parts with low deformation or low load.

Further efforts will be required to demonstrate the industrial application (company selected) and cost efficiency defined. Next step is to build a business model around the case.

More info about Start Circles HERE.

Picture 1: Compounding of a bioplstic composite (extruder die for two filaments (above) and water bath (below)

Picture 2: Bioplastic composite with 15 wt.% humus (lower part of the picture) and 30 wt.% of humus (upper part of the picture)

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Faculty of Polymer Technology is a private non-profit higher education and research institution based in Slovenj Gradec

Faculty of Polymer Technology is a private non-profit higher education and research institution based in Slovenj Gradec. It was founded in 2006 as Polymer Technology College and was promoted to Faculty by the Slovenian Quality Assurance Agency for Higher Education in February 2017.

Its founders are companies from Slovene plastics industry (Adient Slovenj Gradec d.o.o., Grammer Automotive Slovenija d.o.o., Plastika Skaza d.o.o., Kopur d.o.o., BSH Hišni aparati d.o.o. Nazarje), Regional institutions (Municipality of Slovenj Gradec, RRA Koroška d.o.o) and Industry associations/Research organisations (GIZ Grozd Plasttehnika, TECOS - Razvojni center orodjarstva Slovenije).

Others about us

Boris Maroh, inž. tehnol. pol.
Researcher - Polymer competence center Leoben GmbH

I will always remember countless debates from all the lectures that our group of eight students attended. We were the first generation of MA students of Polymer Technology. My Master’s degree enabled me to continue my career path in polymer materials abroad, as well as to continue my studies at University of Leoben.

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Igor Skaza,, Owner and Managing Director of
Plastika Skaza d.o.o.

The services that the Faculty of Polymer Technology offers help solve the problems that we encounter in our production and development of products. They help us reach our company goals. We have been successfully cooperating for many years; they offer quality solutions and are a responsive and a reliable partner that helps us grow and fulfil our mission – to create high quality products from Eco-friendly Plastics.

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Tadeja Rožanc,
Graduate

The faculty organises meetings with foreign experts and professionals, company visits, use of laboratory, and a whole list of practically oriented skills which definitely play a much more decisive role when talking to employers than the actual evaluation grades in the grade book.

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Žan Skodlar,
BA Student of Polymer Technology

The studies at FTPO are practically oriented and offer lectures from a range of professionals connected to the business sector as well, which quarantines high quality education for the students and enables them to have excellent employment opportunities.

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Education, Research and Industry cooperation

As the only academic institution focusing on polymer technology in Slovenia, Faculty of Polymer Technology bases its activities on three pillars: Education, Research and Industry cooperation. We provide our students with the necessary knowledge and skills to become innovative and competent engineers that are fit for responsible tasks in their future assignments. We support society and industry in Slovenia and beyond to cope with the increasingly competitive economic and rapidly changing technological environment by knowledge creation through innovative application oriented research on polymer materials and technologies, Know-How transfer and opportunities for life long learning. We live by our values – Responsiveness, Continuous improvement, Practical Attitude and Personal Approach – to achieve these goals.