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Life cycle assessment of high rate algal ponds for wastewater treatment and resource recovery

The Science of the total environment, 2018-05, Vol.622-623, p.1118 [Peer Reviewed Journal]

Copyright © 2017 Elsevier B.V. All rights reserved. ;Attribution-NonCommercial-NoDerivs 3.0 Spain info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/3.0/es/ ;ISSN: 0048-9697 ;EISSN: 1879-1026 ;DOI: 10.1016/j.scitotenv.2017.12.051 ;PMID: 29890581

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Title:
Life cycle assessment of high rate algal ponds for wastewater treatment and resource recovery
Author: Arashiro, Larissa Terumi ; Montero, Neus ; Ferrer, Ivet ; Acién, Francisco Gabriel ; Gómez, Cintia ; Garfí, Marianna
Subjects: Aigües residuals ; Aprofitament ; Biogas ; Biogàs ; Desenvolupament humà i sostenible ; Energies ; Enginyeria ambiental ; Environmental impact assessment ; Environmental Monitoring - methods ; Fertilizer ; Life cycle assessment ; Microalgae ; Microalgae - growth & development ; Plantes de tractament ; Ponds ; Recursos energètics renovables ; Resource recovery ; Tractament de l'aigua ; Waste Disposal, Fluid - methods ; Waste Water - chemistry ; Wastewater treatment and reuse ; Àrees temàtiques de la UPC
Is Part Of: The Science of the total environment, 2018-05, Vol.622-623, p.1118
Description: The aim of this study was to assess the potential environmental impacts associated with high rate algal ponds (HRAP) systems for wastewater treatment and resource recovery in small communities. To this aim, a Life Cycle Assessment (LCA) was carried out evaluating two alternatives: i) a HRAP system for wastewater treatment where microalgal biomass is valorized for energy recovery (biogas production); ii) a HRAP system for wastewater treatment where microalgal biomass is reused for nutrients recovery (biofertilizer production). Additionally, both alternatives were compared to a typical small-sized activated sludge system. An economic assessment was also performed. The results showed that HRAP system coupled with biogas production appeared to be more environmentally friendly than HRAP system coupled with biofertilizer production in the climate change, ozone layer depletion, photochemical oxidant formation, and fossil depletion impact categories. Different climatic conditions have strongly influenced the results obtained in the eutrophication and metal depletion impact categories. In fact, the HRAP system located where warm temperatures and high solar radiation are predominant (HRAP system coupled with biofertilizer production) showed lower impact in those categories. Additionally, the characteristics (e.g. nutrients and heavy metals concentration) of microalgal biomass recovered from wastewater appeared to be crucial when assessing the potential environmental impacts in the terrestrial acidification, particulate matter formation and toxicity impact categories. In terms of costs, HRAP systems seemed to be more economically feasible when combined with biofertilizer production instead of biogas. On the whole, implementing HRAPs instead of activated sludge systems might increase sustainability and cost-effectiveness of wastewater treatment in small communities, especially if implemented in warm climate regions and coupled with biofertilizer production.
Publisher: Netherlands: Elsevier
Language: English
Identifier: ISSN: 0048-9697
EISSN: 1879-1026
DOI: 10.1016/j.scitotenv.2017.12.051
PMID: 29890581
Source: Recercat

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Life cycle assessment of high rate algal ponds for wastewater treatment and resource recovery

Copyright © 2017 Elsevier B.V. All rights reserved. ;Attribution-NonCommercial-NoDerivs 3.0 Spain info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/3.0/es/ ;ISSN: 0048-9697 ;EISSN: 1879-1026 ;DOI: 10.1016/j.scitotenv.2017.12.051 ;PMID: 29890581

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