RT info:eu-repo/semantics/article
T1 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
A1 Díaz Villalobos, Israel
A1 Díaz Curbelo, Alina
A1 Pérez Lemus, Nereida
A1 Fernández-Polanco Fernández de Moreda, Fernando
A1 Pérez Elvira, Sara Isabel
K1 Anaerobic digestion
K1 Organic micropollutants
K1 Sewage sludge
K1 Traceability
K1 Thermal hydrolysis
AB 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.
PB Elsevier
SN 0960-8524
YR 2020
FD 2020
LK http://uvadoc.uva.es/handle/10324/40677
UL http://uvadoc.uva.es/handle/10324/40677
LA spa
NO Bioresource Technology, Febrero 2020, 305, 123028
NO Producción Científica
DS UVaDOC
RD 24-nov-2024