Microwave vs. alkaline-microwave pretreatment for enhancing Thickened Waste Activated Sludge and fat, oil, and grease solubilization, degradation and biogas production.
Journal of Environmental Management(2019)
摘要
The effects of microwave (MW) and combined alkaline-MW pretreatments on the co-digestion of TWAS:FOG mixtures with 20, 40 and 60% FOG were investigated. MW pretreatment at a high temperature of 175ᵒC was shown to be the most effective MW pretreatment option in solubilizing TWAS:FOG mixtures and boosting methane yield. MW pretreatment at 175ᵒC resulted in maximum solubilization (%) of 68.2% for the 20%FOG samples and a maximum methane yield that was 137% higher than the control for samples with 60%FOG. The combined alkaline-MW (NaOH-MW) pretreatment at pH 10 proved to be not an effective option for TWAS:FOG pretreatment before the anaerobic co-digestion. Despite the benefits of MW pretreatment on the TWAS:FOG samples, including a significant increase in solubilization, dewaterability improvement, high VS reductions, and high methane yield productions, the energy analysis resulted in negative net energy values for all MW-pretreated samples.
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关键词
Pretreatment,Microwave,Alkaline-microwave,Solubilization,Anaerobic co-digestion,FOG
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