Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Espagne → Alternativas a la gestión actual de lodos de fosas sépticas en pequeñas poblaciones rurales : el caso de San Agustín (Teruel)

Universidad Miguel Hernández de Elche (2016)

Alternativas a la gestión actual de lodos de fosas sépticas en pequeñas poblaciones rurales : el caso de San Agustín (Teruel)

Barrena Gómez, Raquel

Titre : Alternativas a la gestión actual de lodos de fosas sépticas en pequeñas poblaciones rurales : el caso de San Agustín (Teruel)

Auteur : Barrena Gómez, Raquel

Université de soutenance : Universidad Miguel Hernández de Elche

Grade : Máster Universitario en Gestión, Tratamiento y Valorización de Residuos Orgánicos 2016

Résumé
Teruel is a province characterized by a large number of municipalities with very low population, more than one third of the municipalities does not reach the 100 registered inhabitants (34.4%) and 81.36% have less than 500 inhabitants. Many of these municipalities have significant seasonal fluctuations in population, which hinder their waste management, especially the case of sludge remaining after the water purification process of urban origin. In rural areas these waters are usually stored in septic tanks or settling basins, which are usually emptied by an authorized agent. The objective of this study was to evaluate possible alternatives to the current management, such as the use of sewage sludge for biogas production or organic amendment. For this goal, the potential for aerobic and anaerobic biodegradability of different samples of faecal sludge from a municipality from Teruel (San Agustin) was evaluated. To carry out this research, parameters as pH, electrical conductivity, total and volatile solids and COD were determined in septic sludge. Also, this waste was treated by a dynamic respirometry and an anaerobic biodegradability test, and the final digestate was stabilized in aerobic conditions. Finally, a germination test was employed to assess the degree of maturity of the final material obtained after the process. The results showed that septic sludge had enough potential to degrade both aerobically and anaerobically, proposing as possible alternatives aerobic stabilization (for example, composting) and / or anaerobic digestion. However, the digestate obtained should undergo further treatment before agricultural use. This digestate showed lower degradability than untreated sludge and phytotoxicity was reduced by aerobic stabilization. However, this aerobic stabilised digestate did not reached the values of germination test established for its use as organic amendment

Présentation

Version intégrale (3 Mb)

Page publiée le 4 février 2021