期刊
WATER AND ENVIRONMENT JOURNAL
卷 30, 期 3-4, 页码 203-210出版社
WILEY
DOI: 10.1111/wej.12188
关键词
anaerobic digestion; energetic potential capture; PS: WAS ratio; sludge management practices
This work aimed the study of methane yield using different proportions of primary sludge (PS) and waste activated sludge (WAS) for anaerobic digestion (AD) conversion. Three trials were carried out: T1 (60 : 40, v/v), T2 (80 : 20, v/v) and T3 (100 : 00, v/v) to estimate the best proportion in comparison with a reference scenario, T0 (40 : 60, v/v). AD was performed in mesophilic conditions with a hydraulic retention time (HRT) of 15 days and an organic loading rate (OLR) expressed in total volatile solids (TVS) of 1.62 +/- 0.06 kg(TVS) m(-3) day(-1). Biogas production for trials T1 and T2 increased from 45 to 71% in comparison with T0. The experimental methane production along trials was used to assess the energy recovery corresponding to increases from 32 to 55%. The most suitable trial to be implemented at real-scale is T1, applying a lower PS solid retention time combined with an increase of WAS thickening.
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