CWWTP are sanitation facilities formed by the coupling of an aerobic post-treatment (i.e. activated sludge, extended aeration, etc.) with a primary anaerobic treatment (i.e. UASB). In these combined arrangements, usually biogas produced in the UASB units is used to drive mechanical energy for aeration requirements in the secondary treatment (i.e. Activated Sludge, AS). Quality of effluents from CWWTP is similar to those from AS processes but combined treatments could become completely self-sufficient in energy consumption. In this manner, CWWTP improve the carbon-sequestration potential in the sanitation sector by increasing the capture of methane-rich biogas and its energy utilization. This study show how effluent quality parameters and energy demand in the AS unit can be influenced by control, sludge external recirculation and aeration strategies. Modelling and simulation tests, have allowed identifying operational conditions for potential energy savings and rational use of the biogas energy available in a full-scale CWWTP treating municipal sewage.
Una revisión de los factores de emisión fue realizada en diversas metodologías asociadas a la cuantificación de la huella de carbono. Asimismo, se hizo un análisis de las fuentes de emisión que liberan los gases efecto invernadero (GEI), de las instalaciones (en un límite geográfico) e incidencias de los GEI según la incertidumbre (resultado de la cuantificación que caracteriza la dispersión de los valores).
Greenhouse gas emissions from the waste sector account for only 4% of the total production, with wastewater management accounting for accurately 8 to 10% of this contribution. Wastewater disposal and treatment activities, mainly contributes to non-CO 2 gases such as methane (CH 4 ) and nitrous oxide (N 2 O). Capturing or avoiding these emissions is thus both a concern and an opportunity. The clean development mechanism (CDM) offers an instrument to internalize global climate concerns into the design of wastewater treatment facilities. Properly designed facilities could improve effluent quality and optimize the abatement of greenhouse gas emissions, thus ensuring additional revenues to pay for capital, operation and maintenance costs and possibly justify higher levels of wastewater treatment. This document summarizes the experience of the "Rio Frio CDM project" in Colombia, as an example of what is achievable through the CDM application in wastewater treatment upgrade in developing countries. This document summarizes the scope of the project, the methodology used to establish current greenhouse emissions and future reductions, and the estimated financial results.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.