info:eu-repo/semantics/article
Characterization and degradation process of sludge profiles inside a facultative pond (Patagonia, Argentina)
Fecha
2011-11Registro en:
Faleschini, Mauricio; Esteves, Jose Luis; Characterization and degradation process of sludge profiles inside a facultative pond (Patagonia, Argentina); IWA Publishing; Water Science And Technology; 64; 11; 11-2011; 2239-2245
0273-1223
1996-9732
CONICET Digital
CONICET
Autor
Faleschini, Mauricio
Esteves, Jose Luis
Resumen
To investigate the characteristics and degradation process in sludge profile, three sampling sessions were made in three different places inside the primary facultative pond of Puerto Madryn city, which was located in a region with a temperate climate in coastal Patagonia (Argentina). The sludge showed an extremely negative redox potential (between −441 and −282 mV) and elevated water content and organic matter concentration, ranging from 83.3 to 97.1% for porosity and from 22.5 to 64.4% for organic matter. The surface layer at the Outlet station during the summer showed the greatest concentration of pigments, reaching a maximum value of 10.6 mg/g for chlorophyll-a and 40.9 mg/g for phaeophytin, and a fast diminution with sediment depth. The important concentration of pigment in the surface layer, coincident with phytoplankton bloom in the water column, could support the importance of nitrogen removal via uptake and organic sedimentation in the water column. In warm months the degradation rate was clear, as reflected in a decrease in sediment layer, and even part of the clay bottom was captured inside an 8 cm core sample, registering extremely low concentrations of pigments, carbohydrates, proteins and lipids. The season and the degree of treatment have an influence on sludge characteristics and the organic matter degradation process.