Management of pig manure in anaerobic lagoons with added biological substrates

Abstract

In this experience pH, T°, redox potential, concentration of sulfides, BOD5, COD, Escherichia coli and coliforms NMP were estimated in stabilization lagoons using a preparation of bacterium for commercial use as biological activator enzyme action. Three of them (T1) on first September 2014, were introduced 285 g of a concentrate of 1.5 billion / g of microorganisms without excipients, the three other (T2) were untreated. At 30 and 60 days of aggregate external biological substrate 10 samples per lagoon each treatment was collected and evaluated on the organic substrate the variables. The bacterium grows the best methane the higher the Tº (T1). The redox stable in T1 values correspond to a reducing environment, rich in hydrogen gas, and therefore, suitable for the growth of strictly anaerobic microorganisms, which indicate decreased elimination of H2S, pH in the presence of T1 benefited these sulphide-oxidizing bacterium preventing the formation of odors associated with the release of H2S. The addition of biological activators of enzymatic action to increase the anaerobic depuration increases the elimination of small lagoon organic matter retention times.