DEGRADA O DE RESíDUOS ORG NICOS PROVENIENTES DA SUINOCULTURA EMPREGANDO O PROCESSO DE BIOAUMENTA O

The application of organic waste from swine in the soil can supply the demand for nitrogen in plants.However, continuous applications or high doses, can cause serious environmental and human health. Thusthe objectives of this study were 1) to study the effect of bioaugmentation in accelerating the degradation ofswine manure in the soil and 2) evaluate the reduction of nitrogen leaching forms, with emphasis on nitrate.To this end, three experiments were conducted: 1) studying the effect of inoculation with bacteria of thegenus Bacillus in the rate of respiration in soil fertilized with swine manure, 2) inoculation effect in reducingthe pollutant load of pig manure by evaluating the COD, organic nitrogen and ammonia, and 3) effect ofinoculation on nitrogen leaching forms (ammonia, nitrite and nitrate) in soils fertilized with swine manure.The inoculum used was a mixture of three species in equal amounts, namely: B. subtilis, B. licheniformisand B. polymyxa. CO2 production was not increased due to inoculation of the microorganism, but there wasa reduction of organic load in the second experiment, showing that inoculation enhanced the degradation.The decrease in nitrate leaching with the accumulation of ammonia, shown in the third experiment showsthe denitrification reaction involving the reduction of nitrate to ammonia via nitrite in a process calledammonification, which justifies the degradation without increased production of CO2.