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-  2015 

污泥的生物干化及其热值变化
Bio-drying of Dewatered Sludge and Changes of Calorific Value

DOI: 10.6054/j.jscnun.2014.12.025

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Abstract:

探讨了物料配比、翻堆方式和通风量对脱水污泥生物干化的影响,分析了污泥生物干化前后热值的变化情况.结果表明,当污泥与园林垃圾的配比为5:2时,温度峰值最高,达54.6℃,物料含水率下降了11.22%,且VS去除率最高;与不翻堆的试验相比,翻堆试验的最终含水率为45.98%,比不翻堆的低2.54%;当通风量为0.5m3/h时,有利于堆体温度的上升和强化干化效果.采用最佳的生物干化条件对污泥进行预干化处理后,堆体的含水率从60.45%降至42.57%;干化后物料的低位热值达到9763.3kJ/kg,有良好的热值资源化前景.
: This study evaluated the effects of material ratio, turning and ventilation on bio-drying of dewatered sludge and the changes of calorific value. Results showed that the peak temperature was the highest and reached 54.6℃ when the sludge and garden waste ratio was 52. The moisture content decreased by 11.22% with the highest VS degradation rate. Compared with no turning, the final water content of turning process was 45.95%, 2.54% lower than that in no turning. The ventilation rate of oxygen was 0.5m3/h in the experiment was conducive to the increase of the pile temperature and strengthening the drying effect. The moisture content of the pile pre-dried with optimal condition decreased from 60.45% to 42.57%. The low calorific value of dried material reached 9763.3kJ/kg. The utilization of calorific value has a good prospect

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