Estudo da hidrólise no processo de codigestão anaeróbia de resíduos sólidos orgânicos

Abstract

The production of solid waste has diversified sharply in their qualitative and quantitative aspects, causing major environmental impacts due to the improper disposal of this waste in the environment, thus altering the quality of soil, water bodies and air. On average about 50% of municipal solid waste is a putrescible organic fraction, which is subject to fermentation, and the remaining 50% corresponds to recyclable materials and inert waste. Anaerobic digestion is an alternative that stands out for the treatment of organic waste, due to the production o f methane as a final product, and is considered a renewable source of energy. This study analyzed the hydrolytic process in anaerobic co - digestion of vegetable waste (VW) and anaerobic sludge from sanitary sewage (ASSS), at room temperature and with total solids of 4% in anaerobic batch reactor, monitored at three experimental stages. The experimental system was designed and installed in monitored on Station Experimental of Biological Treatments of Sewage from the State University of Paraiba in Campina Grande, PB. The substrate used in the reactor feed was prepared from VW mixture along with ASSS, coming from UASB. The products of anaerobic biostabilization process that were in semi-solid form were monitored weekly for a total period of 198 days. For all three experimental stages, the analyzed results indicated that occurred: reductions in pH; solubilization of the CODTotal and NTK; and increased production of the CODFiltered, VFA and N-NH4 . Therefore, the conditions of room temperature and low total solids favored hydrolytic process the substrate.