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oai:uvadoc.uva.es:10324/406772021-05-21T21:24:18Zcom_10324_1173com_10324_931com_10324_894col_10324_1371

Traceability of organic contaminants in the sludge line of wastewater treatment plants: A comparison study among schemes incorporating thermal hydrolysis treatment and the conventional anaerobic digestion Díaz Villalobos, Israel Díaz Curbelo, Alina Pérez Lemus, Nereida Fernández-Polanco Fernández de Moreda, Fernando Pérez Elvira, Sara Isabel Producción Científica The traceability of conventional pollutants and 10 organic microcontaminants in the sludge line of a wastewater treatment plant (WWTP) was evaluated. The application of thermal hydrolysis (TH) as pre-treatment to anaerobic digestion (AD) or as inter-treatment (between two AD stages) was considered and compared with the conventional digestion scheme. TH scenarios reduced the mass flow rate of biosolids (40–60%) as well as the ratio of solids (50–100%), organic matter (5–26%) and nitrogen (8–13%) destined to biosolids. Micropollutants showed a strong tendency to accumulate in the solid phase (more than 90% were sorbed) in spite of thermal and dewatering processes, but TH scenarios exhibited greater removal efficiency (80%) in comparison to conventional AD (50%), reducing the ratio of micropollutants destined to biosolids from a conventional 48% to 7–8%. These findings reveal that TH could increase the value of biosolids from sewage sludge treatment because of greater removal of pollutants and dewaterability. 2020-03-17T19:11:25Z 2020-03-17T19:11:25Z 2020 info:eu-repo/semantics/article Bioresource Technology, Febrero 2020, 305, 123028 0960-8524 http://uvadoc.uva.es/handle/10324/40677 10.1016/j.biortech.2020.123028 123028 Bioresource Technology 305 spa https://www.sciencedirect.com/science/article/pii/S0960852420302972 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier SI