Abstract
Recycling waste into biogas not only provides energy source material, but also reduces the concentration of organic matter in the recycled raw material. The paper studies energy potential and rate of sewage sludge digestion, once combined at municipal plants with chicken manure and sugar beet pulp. A laboratory biogas plant with batch reactors was used for trials. A specific yield of biogas from activated sludge was 597.97±154.75 ml/g OM, specific yield of methane – 9.93±3.16 ml/g OM. The rate of organic matter digestion was 19.31%. Adding broiler chicken manure and sugar beet pulp into the bioreactor had a positive effect on fermentation. The specific yield of biogas increased to 978.39±166.32, bagasse – up to 1089.12±195.26 ml/g OM. The specific yield of methane increased, respectively, to 44.75±12.9 and 16.24±8.16 ml/g OM. The organic matter degradation rate increased to 30.61%, bagasse – to 33.94%. Thus, chicken manure and sugar beet pulp added into the bioreactor increases the efficiency of sludge treated into biogas, which is most likely due to increased mass fraction of organic matter and normalized carbon-nitrogen ratio in the bioreactor.
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More From: IOP Conference Series: Earth and Environmental Science
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