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首页> 外文会议>IWA(International Water Association) International Conference on Wastewater Sludge as a Resource - Biosolids 2003; 20030623-25; Trondheim(NO) >Sludge pre-treatment with pulsed electric fields
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Sludge pre-treatment with pulsed electric fields

机译：脉冲电场处理污泥

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摘要

The anaerobic stabilization process depends - among other things - on the bio-availability of organic carbon. Through pre-treatment of the sludge which leads to the destruction of micro-organisms and to the setting-free of cell content substances (disintegration), the carbon can be microbially converted better and faster. Moreover, effects on the digestion are likely. However, only little experience is available in sludge treatment with pulsed electric fields. Laboratory-scale digestion tests have been run to analyse the influence of pulsed electric fields on the properties of sludge, anaerobic degradation, sludge water reload and foaming of digesters. The results will be compared with those of other disintegration methods (high pressure homogeniser, thermal treatment). The effect of pre-treatment on the sludge is shown by the COD release. Degrees of disintegration have been achieved up to 20%. The specific energy input was high. The energy consumption has been decreased by initial improvements (pre-heating to 55℃). The filament bacteria were partially destroyed. The foam reduction in the digesters was marginal. The anaerobic degradation performance has been improved in every case. The degradation rate of organic matter increased about 9%. Due to the increase of degradation, there is a higher reload of the sludge-water with COD and nitrogen compounds.
机译：除其他因素外，厌氧稳定过程取决于有机碳的生物利用度。通过污泥的预处理，导致微生物的破坏和细胞内物质的释放（分解），碳可以更好更快地被微生物转化。此外，可能会对消化产生影响。但是，只有很少的经验可用于脉冲电场的污泥处理。已经进行了实验室规模的消化测试，以分析脉冲电场对污泥特性，厌氧降解，污泥水重载和消化池泡沫的影响。将结果与其他崩解方法（高压均质机，热处理）进行比较。预处理对污泥的影响通过COD释放来显示。崩解程度已达到20％。比能量输入高。通过初步改进（预热至55℃）降低了能耗。细丝细菌被部分破坏。蒸煮器中的泡沫减少很少。在每种情况下，厌氧降解性能均得到改善。有机物的降解率提高了约9％。由于降解的增加，污泥水中的COD和氮化合物的重载量更高。

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