Wastewater sludge is classified as a difficult dewatering material (DDM) due to the high cake specific resistance (CSR). On the other hand, fly ash is classified as an easy dewatering material (EDM), which suggests that it might be able to improve the dewaterability of wastewater sludge. The water content and cake specific resistance of dewatered sludge without the addition of fly ash were 80% and 2.9×1014 kg/m, respectively. When 50% (by dry weight) fly ash was added to the sludge, the water content and cake specific resistance decreased to 29.4% and 2.9×1013 kg/m, respectively. The cake specific resistance and water content decreased with increasing fly ash additions. Therefore, the production of sludge cake can be reduced by adding fly ash, which can help minimize the social and environmental problems caused by the need to dispose of wastewater sludge.
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机译：由于高滤饼比电阻（CSR），废水污泥被归类为难脱水材料（DDM）。另一方面，粉煤灰被归类为易脱水材料（EDM），这表明它可能能够提高废水污泥的脱水性。不添加粉煤灰的脱水污泥的含水量和饼比电阻分别为80％和2.9×10 14 kg / m。当向污泥中添加50％（以干重计）的粉煤灰时，水含量和滤饼比电阻分别降至29.4％和2.9×10 13 kg / m。随着粉煤灰添加量的增加，滤饼的电阻率和水含量降低。因此，可以通过添加粉煤灰来减少污泥饼的产生，这可以帮助最小化由于需要处理污泥而引起的社会和环境问题。
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