مقاله Enhancement in mesophilic aerobic digestion of waste activated sludge by chemically assisted thermal pretreatment method : تی پی بین

خلاصه مقاله

The effects of hybrid microwave (MW)-alkali pretreatment methods on the efficiency of mesophilic aerobic digestion were studied. The MW-alkali pretreatment (95 °C-pH 12) was observed to enhance the sludge solubilization synergistically from 0.5% (raw) to 52.5% (MW-NaOH) and 48.7% (MW-KOH), which are 20% greater than the additive value of MW only and alkali only (16%_MW + 28.4%_NaOH = 44.4% and 16%_MW + 25.5_KOH = 41.5). The higher VSS solubilization was observed for hybrid MW-NaOH (53.9%) and MW-KOH (47.4%) methods. The batch mesophilic (35 °C) aerobic digestion system led to 81.1% TCOD degradation and 72.4% VSS degradation at 20 days of retention time, with 35% higher TCOD and VSS reduction in comparison with the control system. The filterability of microwave-alkali pretreated sludge was improved remarkably after aerobic digestion. Moreover, the proposed method is capable of effectively sanitize the sewage sludge and produce Class A biosolids.

نویسندگان

Vinay Kumar Tyagi [ Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, ROC ]

Shang-Lien Lo [ Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, ROC ]

کلمات کلیدی

Microwave alkali pretreatment methods Waste activated sludge Sludge solubilization Mesophilic aerobic digestion Class A biosolids

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Bioresource Technology

The journal's aim is to advance and disseminate knowledge in all the related areas of biomass, biological waste treatment, bioenergy, biotransformations and bioresource systems analysis, and technologies associated with conversion or production.

حوزه های تحت پوشش : Bioresource Technology