臭氧氧化法深度处理生活垃圾焚烧厂沥滤液  被引量:4

Advanced treatment of leachate from MSW incineration by ozonation

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作  者:穆永杰[1] 叶杰旭[2] 孙德智[1] 

机构地区:[1]北京林业大学水体污染源控制技术北京市重点实验室,北京100083 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090

出  处:《环境工程学报》2013年第4期1535-1540,共6页Chinese Journal of Environmental Engineering

基  金:北京市教育委员会科技成果转化与产业化项目(2009);哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金项目(QAK201007)

摘  要:采用臭氧氧化法对生活垃圾焚烧厂沥滤液经生化处理后的废水(称沥滤液生化处理水)进行深度处理。实验结果表明,COD降解速率随废水pH的提高明显增加,其中pH=10.5时的COD降解速率常数约为pH=4时的5.8倍。在臭氧投量为52.92 mg/min、pH=10.5的条件下反应70 min后,UV254和COD去除率分别达到84.7%和59.3%。向反应体系投加叔丁醇后COD去除率下降了约15%,由羟自由基氧化去除的COD占总COD去除量的26.7%。毒性实验结果表明,沥滤液生化处理水的96 h-EC50为38%,经臭氧氧化进一步处理后出水的96 h-EC50为77%,表明经臭氧深度处理后沥滤液生化处理水的毒性明显降低。Leachate from municipal solid waste (MSW) incineration was advanced treated by ozonation af ter biological treatment. The results showed that, the constant of COD degradation rate increased with the increase of pH value obviously. The rate constant at pH = 10.5 was 5.8 times as high as that at pH = 4. When the ozone dosage was 52.92 mg/min, the pH value was 10.5 and the reaction time was 70 min, the removal efficiencies of UV2s4 and COD were 84.7% and 59.3% , respectively. COD removal efficiency decreased about 15% by the addition of tert-butyl alcohol(TBA) in the reaction system. The COD removed by hydroxyl radical oxidation accounted for 26.7% of the total COD removal quantity. The toxicity experiment results showed that 96 h-ECs0of the influent was 38% and 96 h-ECs0of the effluent after ozonation was 77%. This fact demonstrates that the toxicity of the wastewater after ozonation could be reduced markedly.

关 键 词:生活垃圾焚烧厂 沥滤液臭氧氧化 小球藻 毒性 

分 类 号:X703[环境科学与工程—环境工程]

 

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