Análise da atividade metanogênica específica da co-digestão de lixiviado de aterro sanitário com água residuária de suinocultura

Abstract

Swine wastewater (SW) and landfill leachate and potential environmental impacts of difficult reversal. An alternative for the treatment of both is an anaerobic digestion which can be optimized with a combination of more than one substrate. Please inquire about the subject of the environmental impact analysis in the waste area by means of the Specific Methanogenic Activity test (SMA). To meet the objective, the volumetric methane production method was used from NaOH displacement. Firstly, with adapted eudiometric materials, a characterization of the substrates and sludge was carried out, to perform AME tests. In the SMA assays, 11 treatments were used, two to control the endogenous methanogenic activity and the others for the study of Substrate/ Microorganism ratio (S/M) 1: 1, 1: 2 and 3: 5, as well as leachate proportions of 10, 20 and 30%. In the first test, 191.19 ml was obtained as the highest methane production average for the reactor containing 10% leachate and S/M 3: 2 ratio. Alkalinity and volatility analysis showed favorable results for anaerobic digestion, while analysis of the removal of solids and COD presented values higher than 50%. However, from the results of SMA, there was a possibility of inhibition due to the amount of leachate. In this way, a further SMA test is performed, using the S/M ratios in question, with 3, 6 and 9% of leachate. In this test, a higher methane production wasobserved in relation to the tests with higher concentrations of leachate. For example, a co-digestion of the landfill leachate in SW presents an alternative for the treatment of both.