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INTRODUCTIONInthelastdecades,Chineseurbanpopula tionincreasedrapidlyasaresultoftheaccelerat edeconomicdevelopmentandurbanization .Atthesametime ,theestimatedoftheamountofmunicipalsolidwaste (MSW )generatedandcollectedperpersonperdayhasbeengrowingyearbyyea… 相似文献
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填埋已成为我国城市生活垃圾的一种主要处理方式。对填埋过程中产生的垃圾渗滤液进行分析评价并进行处理,已成为防止其造成二次污染的一个必要环节。基于对洛阳市盘龙冢垃圾填埋场渗滤液处理处置的必要性和紧迫性的分析,采用单项污染指数法对其水质进行分析评价,对其污染现状进行分析和讨论,并对其处理现状进行了深入调查。 相似文献
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结合我国实际和生活垃圾填埋场产生的渗滤液对环境的影响,对一种能够有效处理渗滤液的回灌方法进行了初步研究.回灌试验考虑到渗滤液水质复杂多变,具有高COD含量、高NH3-N含量和高重金属离子的特点,主要采取厌氧回灌.研究内容主要有两个方面:一方面,对试验垃圾渗滤液进行回灌试验,研究回灌法对垃圾渗滤液中CODcr、NH3-N、NO3-N、NO2-N等各项指标的去除效果;另一方面,主要通过改变pH值和改变依据CODcr调节的水力负荷值来研究对渗滤液回灌效果的影响因素。 相似文献
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The influence of calcination temperature on TiO2 nanotubes' catalysis for TiO2/UV/03 was investigated. TiO2 nanotubes (TNTs) were prepared via the sol-gel method and calcined at 300--700 ℃, which were labeled as TNTs-300, TNTs-400, TNTs-500, TNTs-600 and TNTs-700, respectively. TNTs were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). It is found that TNTs calcined at 400 ℃ showed the best thermal stability. When the calcination temperature increased from 400 ℃ to 700 ℃, the special structure of tubes was destroyed and gradually converted into nanorods and/or particles. The transformation from anatase to rutile occurred at 600 ℃, and the rutile phase was enhanced when the calcination temperature was increased to over 600 ℃. The calcina- tion temperature's influence on TNTs' adsorption activity for for TiO2/UV/O3 was investigated in landfill leachate solution chemical oxygen demand (COD) and catalytic activity In landfill leachate solution, the adsorption activity of COD decreased in the reduced order of TNTs-300, TNTs-400, TNTs-500, TNTs-600 and TNTs-700. In photocatalytic ozonation, TNTs-400 showed the best catalytic activity while TNTs-700 exhibited the worst. In other three processes, the COD removal of TNTs-300/UV/O3 was higher than those of TNTs-500/UV/O3 and TNTs-600/UV/O3 in the first 20 rain, and then became close to those of the latter two in the following 40 rain. Compared with TNTs-300 and TNTs- 400, TNTs-600 had the best anti-fouling activity, while TNTs-500 and TNTs-700 had lower anti-fouling activity than the former three. In photocatalytic ozonation, the calcination temperature of 400 ℃ was appropriate when TNTs were obtained at the synthesis temperature of 105 ℃. 相似文献
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人工湿地是近几年出现的垃圾渗滤液处理技术,通过其中的湿地植物、微生物和床体的协同作用,达到对渗滤液中污染物质的有效去除,其结构与功能决定了其在垃圾渗滤液处理上的优势.国内外的应用实例显示了其处理效果,同时也反映了对进水的要求,在进水浓度较高的情况下,需要进行相应的预处理,达到进水要求. 相似文献
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在对固体废弃物渗滤液的污染检测过程中,由于传统方法是采用渗滤液迅速导电的特点进行污染检测的,渗滤液导电率一旦受到外界因素的影响,就会产生电流波动,造成检测误差大的问题。为此,提出了基于小波熵算法的固态废弃物渗滤液的污染检测优化方法。利用小波系数阈值对固态废弃物渗滤液的污染信号特征及软阀值进行有效的提取,将软阈值映射在具有污染信号能量分布特性的小波熵范围中,依据污染信号在不同分解尺度上会带有不同小波熵的特点,可以自适应地确定污染信号高频系数分量的阈值,从而完成对固态废弃物渗滤液的污染检测。仿真分析表明,基于小波熵算法的固态废弃物渗滤液的污染检测优化方法精准率高,实用性强。 相似文献
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漯河市垃圾渗滤液处理厂采用"混凝沉淀-A/O-MBR-NF/RO"工艺处理垃圾渗滤液。该工艺日处理200m3垃圾渗滤液,出水水质满足国家生活垃圾填埋污染控制标准(GB16889-2008)。本文介绍了该渗滤液处理系统的工艺流程,总结分析了工艺设计的要点。 相似文献