生活垃圾填埋场渗滤液超临界水氧化试验研究
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X52

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国家自然科学基金(U1404523)


Experimental research on treatment of municipal waste landfill leachate using supercritical water oxidation
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    摘要:

    采用间歇式超临界水氧化反应装置,用过氧化氢为氧化剂,对生活垃圾填埋场渗滤液进行处理,考察了反应温度、压力、停留时间等因素对氧化效果的影响。结果表明:超临界水氧化对渗滤液COD和TOC的去除率随着反应温度、压力、停留时间的增加而显著提高。当渗滤液原水COD、TOC和BOD的质量浓度分别为8 119、2 289和971 mg/L时,在反应温度405℃,压力25 MPa,停留时间37.1 s的条件下,经超临界水氧化反应后,渗滤液中COD和TOC的去除率分别达到了98.8% 和97.6%。此外,超临界水氧化反应能明显改善渗滤液的可生化性,反应后渗滤液的生化比由0.12提高到0.55。

    Abstract:

    Municipal waste landfill leachate was treated with a batch-type supercritical water oxidation process, with hydrogen peroxide as the oxidant. The impacts of reaction temperature, pressure, and retention time on oxidation efficiency were studied. The results show that the COD and TOC removal efficiency of leachate treated with supercritical water oxidation improved with the increase of reaction temperature, pressure, and retention time. After supercritical water oxidation, the efficiencies of removal of COD and TOC reached 98. 8% and 97. 6%, respectively, under the conditions that the concentrations of COD, TOC, and BOD in untreated leachate were 8119 mg/L, 2 289 mg/L, and 971 mg/L, respectively; the reaction temperature was 405℃; pressure was 25 MPa; and the retention time was 37. 1 seconds. The results show that supercritical water oxidation could effectively improve the biodegradability of landfill leachate. The ratio of biodegradability of leachate increased from 0. 12 to 0. 55.

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龚为进,魏永华,赵亮,等.生活垃圾填埋场渗滤液超临界水氧化试验研究[J].水资源保护,2017,33(2):59-62.(GONG Weijin, WEI Yonghua, ZHAO Liang, et al. Experimental research on treatment of municipal waste landfill leachate using supercritical water oxidation[J]. Water Resources Protection,2017,33(2):59-62.(in Chinese))

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  • 收稿日期:2016-06-15
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  • 在线发布日期: 2017-03-24
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