RT Journal Article
T1 Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?
A1 Longo, Stefano
A1 Frison, Nicola
A1 Renzi, Daniele
A1 Fatone, Francesco
A1 Hospido Quintana, Almudena
K1 Short cut enhanced nutrient abatement (SCENA)
K1 Side-stream treatment
K1 Life cycle analysis (LCA)
K1 Life cycle cost (LCC)
K1 Monte carlo analysis
K1 Sludge phosphorus availability
AB The environmental and economic benefits and burdens of including the first Short Cut Enhanced Nutrient Abatement (SCENA) into a real municipal wastewater treatment plant were evaluated using life cycle assessment (LCA) and life cycle cost (LCC). The implications of accomplishing nitrogen (N) removal and phosphorus (P) recovery via nitrite in the side stream were assessed taking into account the actual effluent quality improvement, the changes in the electricity and chemical consumption, N2O, CO2 and CH4 emissions and the effects of land application of biosolids, among others. In addition, a case-specific estimation of the P availability when sludge is applied to land, therefore replacing conventional fertilizer, was performed. Furthermore, to account for the variability in input parameters, and to address the related uncertainties, Monte Carlo simulation was applied.The analysis revealed that SCENA in the side stream is an economic and environmentally friendly solution compared to the traditional plant layout with no side-stream treatment, thanks to the reduction of energy and chemical use for the removal of N and P, respectively. The uncertainty analysis proved the validity of the LCA results for global warming potential and impact categories related to the consumption of fossil-based electricity and chemicals, while robust conclusions could not be drawn on freshwater eutrophication and toxicity-related impact categories. Furthermore, three optimization scenarios were also evaluated proving that the performance of the WWTP can be further improved by, for instance, substituting gravitational for mechanical thickening of the sludge or changing the operational strategy to the chemically enhanced primary treatment, although this second alternative will increase the operational cost by 5%. Finally, the outcomes show that shifting P removal from chemical precipitation in the main line to biologically enhanced uptake in the side stream is key to reducing chemicals use, thus the operational cost, and increasing the environmental benefit of synthetic fertilizers replacement
PB Elsevier BV
SN 0043-1354
YR 2017
FD 2017-09-06
LK http://hdl.handle.net/10347/15803
UL http://hdl.handle.net/10347/15803
LA eng
NO LONGO, STEFANO, FRISON, NICOLA, RENZI, DANIELE, FATONE, FRANCESCO and HOSPIDO, ALMUDENA, 2017, Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?. Water Research. 2017. Vol. 125, p. 478-489. DOI 10.1016/j.watres.2017.09.006. Elsevier BV
NO S. Longo and A. Hospido belong to the Galician Competitive Research Group GRC2013-032 and to the CRETUS strategic Partnership (AGRUP2015/02), co-funded by FEDER (EU). Besides, S. Longo and A. Hospido are supported by ‘ENERWATER’ Coordination Support Action that has received founding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 649819, while N. Frison, F. Fatone and D. Renzi are supported by ‘SMART-Plant’ Innovation Action that has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 690323. The authors would also like to thank the reviewers for their valuable comments
DS Minerva
RD 27 abr 2026