| dc.description.abstract | Anaerobic digestion of waste mud is a process improving the characteristics of mud as a fertilizer and soil improver
owing to the existence of a group of anaerobic bacterial microorganisms occurring in fecal matter which
act on organic waste of vegetal and animal origin and produce a mixture of gases with large contents of methane
(CH4) known as biogas. Biogas is particularly efficient if used as a fuel. Thus, waste with high concentration
of nutrients and organic matter, ideal as fertilizers, can be used a fresh state because anaerobic treatment kills
pathogens and bad smells. This research shows how a digester of biosolids was used with a treatment volume
of 50 liters, a useful volume of 37.4 in thermophilic (53°C) and mesophilic (23°C) conditions; it was fed with
biological biosolids from the Plant of Sewage Treatment PTAR in the city of Cuenca. The plant was operated in
hydraulic retention times of 39 days. The fed biosolid is characterized by having an average of fecal coliforms of
2.06 E+6, total volatile solids of 2,8 % and helminthes eggs of 21 H.H/4g.ST. A reduction of fecal coliforms was
attained (97,2 NMP /g ST), which is under the Mexican norm (1000.NMP/ g ST) in relation to the amount of
helminthes eggs, with values up to 2.4 H.H/4g.ST. | |
