1. Management challenges for a more decentralized treatment and reuse of domestic wastewater in metropolitan areas
- Author
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Walter Alfredo Tejerina, Martín Alejandro Iribarnegaray, Liliana Beatriz Moraña, María Soledad Rodriguez-Alvarez, and Lucas Seghezzo
- Subjects
Engineering ,media_common.quotation_subject ,0208 environmental biotechnology ,Septic tank ,METROPOLITAN AREAS ,02 engineering and technology ,010501 environmental sciences ,Development ,Reuse ,01 natural sciences ,Ciencias de la Tierra y relacionadas con el Medio Ambiente ,law.invention ,WASTEWATER REUSE ,law ,SALTA ,Waste Management and Disposal ,Filtration ,0105 earth and related environmental sciences ,Water Science and Technology ,media_common ,DECENTRALIZED SANITATION ,DOMESTIC WASTEWATER ,Wastewater reuse ,Anaerobic sludge ,Waste management ,business.industry ,Oceanografía, Hidrología, Recursos Hídricos ,Public Health, Environmental and Occupational Health ,Environmental engineering ,DECENTRALIZED WASTEWATER TREATMENT SYSTEMS ,Pollution ,Metropolitan area ,020801 environmental engineering ,Wastewater ,Sewage treatment ,business ,CIENCIAS NATURALES Y EXACTAS - Abstract
In a case study located in suburban sectors of the metropolitan area of the Lerma Valley (Valle de Lerma), in the province of Salta (Argentina), 24 informal decentralized wastewater treatment systems (DWWTS) were evaluated. The analyzed systems had three general configurations: A, septic tank; B, septic tank combined with upflow anaerobic sludge blanket (UASB) reactor; C, septic tank combined with UASB and a final filtration step. Statistically significant differences (p < 0.05) were observed in effluent quality, measured as total coliforms, thermotolerant coliforms, and chemical oxygen demand (COD). Treatment A was the most inefficient, and was statistically different from B and C; there were no significant differences between the latter two. Thermotolerant coliform concentrations were high in all analyzed systems and did not comply with local discharge standards in soakaway pits or in the ground. The lack of a final disinfection step in these systems is thus a weakness that needs to be addressed. The formal inclusion of DWWTS in urban planning could reduce overall investment costs, as long as the best technologies are selected for each case. Incorporation of DWWTS in formal urban planning requires an open debate in which the social perspectives of all relevant users need to be considered. Fil: Iribarnegaray, Martín Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina Fil: Rodriguez Alvarez, Maria Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina Fil: Moraña, Liliana Beatriz. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina Fil: Tejerina, Walter Alfredo. Universidad Nacional de Salta. Facultad de Ingeniería; Argentina Fil: Seghezzo, Lucas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina
- Published
- 2017
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