Research of Sludge Properties during Startup of Integrated Anoxic Aerobic Process

Abstract:

An integrated and three-dimensional anoxic-aerobic (A/O) process is put forward. The novel A/O process is used to treat printing and dyeing wastewater with concentrated sludge of sludge concentration tank as inoculated sludge. The experiment studies the sludge properties during startup of the A/O process. The results show that the inoculated sludge has completely adapted the quality of the wastewater after operation of 54 d. The average MLSS of A tank and O tank reach 7.26 g/L and 3.69 g/L at the end of the last stage, respectively. The ratios of MLVSS to MLSS in A/O reactor are stable at 0.63 - 0.75. And the sedimentation velocity of sludge has a large-scale promotion and reaches 34.2 m/h in A tank and 25 m/h in O tank, respectively. Simultaneously, the novel A/O reactor has high biodegradability for pollutants with COD_cr removal efficiency of about 70%. The results indicate that the integrated A/O process will be a better method to treat printing and dyeing wastewater.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 3445-3449
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.3445
• Online since: May 2012
• Authors: Yong Fu Guo, Jin Yu Chu, Yong Jian Liu, Wei Jia Zhang, Le Zhong Xu
• Keywords: A/O Process, Aerobic, Anoxic, Printing and Dyeing Wastewater, Sludge Property

References

[1] X. Zheng and J. X. Liu: Desalination Vol. 190 (2006), p.277.

[2] H. F. Wu, S. H. Wang, H. L. Kong, T. T. Liu and M. F. Xia: Bioresour. Technol. Vol. 98 (2007), p.1501.

[3] B. H. Guan: Amer. Chem. Soc. Vol. 229 (2005), p. U840.

[4] X. L. Guo, Y. D. Yao, G. F. Yin, Y. Q. Kang, Y. Luo and L. Zhuo: Appl. Clay Sci. Vol. 40 (2008), p.20.

[5] X. J. Lu, J. H. Chen, Z. X. Mi and D. L. Xi: Environ. Sci. Technol. Vol. 1 (2007), p.1137.

[6] X. Chen and H. L. Sun: Chin. J. Oceanol. Limnol. Vol. 27 (2009), p.875.

[7] X. F. Shen, X. F. Sun, T. T. Xu and P. K. Jin: J. of Xi'an Polytechnic Univ. Vol. 23 (2009), p.573.

[8] X. J. Lu, L. Liu, B. Yang and J. H. Chen: J. Clean. Prod. Vol. 17 (2009), p.111.

[9] J. Wang, Z. J. Zhang, Z. F. Zhang, P. Zheng and C. J. Li: Afr. J. Biotechnol. Vol. 6 (2007), p.902.

[10] B. Yan, Y. G. Li, Y. B. Hong, L. H. Lin, W. G. Lan and J. Wen: Conf. Environ. Pollut. Public Health Vol. 1-2 (2010), p.940.