Experimental Study on New Technology for Solidifying/Stabilizing Papermaking Sludge

Abstract:

For better harmlessly treatment of papermaking sludge, a new technology for solidifying and stabling of sludge was studied. Papermaking sludge was solidified and stabilized by the solidifying agents including cement, powder fly ash (PFA) and cinder. The mechanical properties of solidified sludge block were evaluated by compressive strength, chemical oxygen demand (COD) and heavy metals concentration in the leachate from the solidified block were tested as well. When the solidifying agents has the following composition (cement 0.12kg/kg, PFA 0.02kg/kg and cinder 0.10kg/kg respectively), and the curing time was 6ds, the compressive strength of the solidified sludge blocks reached 360kPa. The results showed that cement and cinder were all positive in the compressed strength of sludge block. If they were mixed with PFA together, they could enhanced the solidification of organic and heavy metals in the sludge. Under this conditions, the COD in leachate from the solidified block was 115.7 mg/L, and the heavy metal concentration had reached the related national standards, after 6ds of curing time, water ratio of the solidified block kept from 35% to 40%, which met the prescribed standards of landfill.

• Periodical: Advanced Materials Research (Volumes 156-157)
• Pages: 84-89
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.156-157.84
• Online since: October 2010
• Authors: Xu Nan Ning, Shi Wen Li, Jing Yong Liu, Zuo Yi Yang, Zhu Ying
• Keywords: Compressive Strength, Heavy Metal, Papermaking Sludge, Solidification, Stabilisation

References

[1] S. Vladimir and J. E. Tim: Waste Management. Vol. 29(2009), p.1644.

[2] D. Wei, G.D. Zhang, T.B. Chen, B.T. Fu, M. Lei, D. Gao, B. Yue, B. Liu and J. Zhang: Ecology. Vol. 28 (2008), p.5095(in Chinese).

[3] R. R. Simard, R. Baziramakenga, S. Yelle and J. Coulombe: Canadian Journal of Soil Science. Vol. 78 (1998). p.689.

[4] A. Koeing, J. N. Kay and I. M. Wan: Water Science and Technology. Vol. 3/4(1996). p.533.

[5] B. R. Gurjar: Sludge Treatment and Disposal(The Netherlands, A A Balkema. 2001).

[6] W. Zhu, L. Li and C. Lin: Rock and Soil Mechanics. Vol, 27(2006). p.933(in Chinese).

[7] M. Kamon, S. lnazumi and G. Rajasekaran: Soil and Foundations, JGS. Vol. 42(2002). p.13.

[8] S. Valls and E. Vazquez: Cement and Concrete Research. Vol, 30(2000). p.1671.

[9] C.D. Che N.W. Zhu and Y.L. Li: Transaction of safety and environment. Vol. 8(2008). p.56 (in Chinese).

[10] J. A. Stegemann and N. R. Buenfeld: Cement and Concrete Research. Vol. 32(2002). p.903.

[11] Ja Hyeung Jeoung. Solidification/stabilization of dredged sludge withlow alkalinity additives and geo-environmental assessnlent(Kyoto: Kyoto University, 2003).

[12] GB/T 5086-1997. Test method standard for leaching toxicity of solid waste：horizontal vibration extraction procedure(in Chinese).

[13] J. Langesen, T. Moskeland and A. Keley, in: Innovative technology for stabilization of contaminated sediments in Trondheim harbour. edtied by Pelei M., Porta A. Proceedings of the Second the International Conference on Remediation of Contaminated Sediments. Columbus: Battele Press，(2003).

[14] A. Koening, J. N. Kay, I. M. Wan: Water Science and Technology. Vol. 34(1996). p.533.

[15] GB 5085. 3-2007. Identification standards for hazardous wastes-identification for extraction toxicity(in Chinese).