微波和堿诱导预处理对污泥溶解和随后好氧消化的影响。
Effects of microwave and alkali induced pretreatment on sludge solubilization and subsequent aerobic digestion.
机构信息
Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, ROC.
出版信息
Bioresour Technol. 2011 Sep;102(17):7633-40. doi: 10.1016/j.biortech.2011.05.031. Epub 2011 May 19.
Individual and combined effects of microwave (MW) and alkali pretreatments on sludge disintegration and subsequent aerobic digestion of waste activated sludge (WAS) were studied. Pretreatments with MW (600W-85°C-2 min), conventional heating (520 W-80°C-12 min) and alkali (1.5 g NaOH/L - pH 12-30 min) achieved 8.5%, 7% and 18% COD solubilization, respectively. However, combined MW-alkali pretreatment synergistically enhanced sludge solubilization and achieved 46% COD solubilization, 20% greater than the additive value of MW alone and alkali alone (8.5+18%=26.5%). Moreover, the results of the batch aerobic digestion study on MW-alkali pretreated sludge showed 93% and 63% reductions in SCOD and VSS concentrations, respectively, at 16 days of SRT. The VSS reduction was 20% higher than that of WAS without pretreatment.
研究了微波（MW）和碱预处理对污泥解体的单独和联合作用，以及随后对废活性污泥（WAS）的好氧消化。MW（600W-85°C-2 min）、常规加热（520 W-80°C-12 min）和碱（1.5 g NaOH/L - pH 12-30 min）预处理分别实现了 8.5%、7%和 18%的 COD 溶解。然而，MW-碱联合预处理协同增强了污泥的溶解，实现了 46%的 COD 溶解，比 MW 单独和碱单独的加和值（8.5+18%=26.5%）高出 20%。此外，MW-碱预处理污泥的批量好氧消化研究结果表明，在 SRT 为 16 天时，SCOD 和 VSS 浓度分别降低了 93%和 63%。与未经预处理的 WAS 相比，VSS 减少了 20%。
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