LEDERER Tomáš Technical University of Liberec

Operational Experiences with a Nanofibre Biomass Carrier used for the Treatment of Toxic Industrial Wastewaters

Co-authors KŘIKLAVOVÁ Lucie

Biofilm processes are very often used for the treatment of low biodegradable or toxic contaminants. The main advantages of a biofilm biotechnology are a higher residence time and concentration of biomass in the bioreactor. Crucial requirements for any carrier are excellent colonization, the maximum specific surface area, optimal density and ease of production. Based on these crucial parameters the Technical University of Liberec developed new types of biomass carriers which are based on the use of different kinds of polymeric nanofibre materials. The key component is a yarn which consists of a carrier fibre supporting a layer of nanofibres with a diameter in the order of hundreds of nanometres. A priority of the nanofibre carriers, presented previously (Kriklavova 2013), is a large protected specific surface area which promotes the initial adhesion and rapid development of the biofilm. The aim of this contribution is to present long-term full-scale operational experiences with the first type of nanofibre carrier applied for the treatment of industrial wastewaters from production of chloramines and perchlorate bleach. The bioreactor with the nanofibre carrier is operated under real conditions in parallel with a conventional activated sludge system. A direct comparison of the efficiency of both the systems and an evaluation of their mechanical properties are presented in this contribution. The full-scale application of the nanofibre carrier confirmed its potential to stabilize the treatment process.