Experimental Study on Fly Ash for Conditioning of Specific Resistance of Sludge Water


Discharge of sludge from water works into waters will result in the increased deterioration of water environment. Therefore, an experimental study was conducted on the addition of conditioning agent to improve sludge dewatering performance. The result shows that coagulation is inadaptable to the treatment of sludge from water works and use of powdered coal ash from power plant as conditioning agent can greatly reduce the specific resistance of sludge and the dewatering performance can be improved. The optimal dosage of fine powdered coal is 20g/100mL and coarse powdered coal is 30g/100mL. Powdered coal is mixed with sludge to form filter cake, which is blended with coal in certain proportion to make into fuel. So that incineration of sludge from water works can be realized.

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Liu, B. and Ding, P. (2013) Experimental Study on Fly Ash for Conditioning of Specific Resistance of Sludge Water. Journal of Geoscience and Environment Protection, 1, 22-25. doi: 10.4236/gep.2013.12005.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Liu, H., & Xu, J. H. (2001). Survey on the development of sludge water treatment in waterworks at home and abroad. China Water and Wastewater, 17, 24-26.
[2] Novak, J. T., & Mark, L. (1977). The use of polymers for improving chemical sludge dewatering on sand bed. AWWA, 69, 106-109.
[3] Lu, J. J., Wang, Y. L., Hou, L., et al. (2005). Fractal characteristics and scale dependence of mature granular sludge in anaerobic baffled reactor (ABR). Environmental Science, 26, 119-123.
[4] John, T. N. (1999). Conditioning, filtering and expressing waste activated sludge. Journal of Environmental Engineering, 125, 816-824. http://dx.doi.org/10.1061/(ASCE)0733-9372(1999)125:9(816)
[5] Kopp, J., & Dichtl, N. (2001). Prediction of full-scale dewatering results of sewage sludge by the physical water distribution. Water Science Technology, 43, 135-143.
[6] Xu, Q., Zhang, C. M., & Zhao, L. J. (2003). The technology and equipment of sludge disposal. Beijing, Chemical Industry Press, 19- 26.
[7] Fei, X. L., & Cui, F. Y. (2004). Experimental research on sludge dewatering property at waterworks in Xiamen City. Water and Wastewater Engineering, 4, 1-5.

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