Biochar; Cellulose; Circular economy; Constructed wetlands; Micropollutants; Charcoal; biochar; Water Pollutants, Chemical; Wastewater; Germany; Wetlands; Charcoal/chemistry; Water Pollutants, Chemical/analysis; Cellulose/chemistry; Waste Disposal, Fluid/methods; Wastewater/chemistry; Admixture; Constructed wetland; Micropollutant removals; Municipal wastewaters; Post treatment; Waste water treatment plants; Wastewater effluents; Waste Disposal, Fluid; Environmental Engineering; Environmental Chemistry; Waste Management and Disposal; Pollution
Abstract :
[en] This study aimed to evaluate the suitability of biochar produced by pyrolysis from recovered wastewater cellulose and activated biologically as an admixture in Constructed Wetlands (CWs) when applied as a post-treatment step to remove micropollutants (MPs) from municipal wastewater effluent. Two planted vertical flow mesocosm CWs with cellulose-based admixtures of different origins (plant residue and recovered toilet paper) were fed with a municipal wastewater effluent representative for rural catchments. The results showed an average MPs elimination of 89.1 % for the activated biochar produced from recovered cellulose when 15 relevant compounds are considered and a reduction of the risk from compounds cocktail below the maximum acceptable level having diclofenac, carbamazepine, PFOS, ciprofloxacin and clarithromycin as main risk drivers (Risk Quotient > 1). The implementation of a circular approach to reduce MPs was finally conducted for the Blies catchment (Saarland region in Germany) characterized by low population density and small, sensitive water bodies. This approach demonstrates the feasibility of combining cellulose recovery with a fine sieve in large wastewater treatment plants (WWTPs) and providing biochar produced from recovered cellulose as an admixture to small WWTP where CW is an affordable solution for MP mitigation.
Disciplines :
Civil engineering
Author, co-author :
VENDITTI, Silvia ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
SALMERON GARCIA, Irene ; University of Luxembourg > Faculty of Science, Technology and Medicine > Department of Engineering > Team Joachim HANSEN
NUNEZ TAFALLA, Paula ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
Hobus, Inka; Wupperverbandsgesellschaft für integrale Wasserwirtschaft mbH, Untere Lichtenplatzer Straße 100, D-42289 Wuppertal, Germany
Kolisch, Gerd; Wupperverbandsgesellschaft für integrale Wasserwirtschaft mbH, Untere Lichtenplatzer Straße 100, D-42289 Wuppertal, Germany
HANSEN, Joachim ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
External co-authors :
yes
Language :
English
Title :
Biochar from recovered cellulose as new admixture in constructed wetlands for micropollutant removal: A circular approach.
The presented outcomes are part of the North-West European Interreg project VB WOW (Wider business Opportunities for raw materials from Wastewater \u2013 NWE project number 619). The authors would like to acknowledge the support from all the partners involved in the project and the Syndicat Intercommunal de d\u00E9pollution des eaux r\u00E9siduaires de l'Ouest (SIDERO) which kindly provided the wastewater.
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