| Title | Biochar from recovered cellulose as new admixture in constructed wetlands for micropollutant removal: A circular approach |
|---|---|
| ID_Doc | 23493 |
| Authors | Venditti, S; Salmeron, I; Tafalla, PN; Hobus, I; Kolisch, G; Hansen, J |
| Title | Biochar from recovered cellulose as new admixture in constructed wetlands for micropollutant removal: A circular approach |
| Year | 2024 |
| Published | |
| Abstract | 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 posttreatment 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. |
| https://doi.org/10.1016/j.scitotenv.2024.172055 |
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