Effects of Ce³⁺ Addition on Granulation of Activated Sludge

Abstract:

In this study the effect of Ce³⁺ on activated sludge granulation were first studied. It was found that 50 mg/l Ce³⁺ significantly promotes the granulation of activated sludge and more compacted smaller aerobic granules are formed. Additional Ce³⁺ has no influences on COD removal efficiency, but improved the SOP removal efficiency significantly. Although protein contents in extracellular polymeric substances increased along with granulation in both reactors, protein content in EPS of Ce³⁺-fed granules was higher than that without Ce³⁺ addition. Polysaccharide contents in extracellular polymeric substances decreased slightly through the experiment in the two reactors. Scanning electron microscopy showed that bacilli and cocci were dominant on surface of granules in both reactors. But there were more and longer rod-shaped bacteria on surface of Ce³⁺-fed granules.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 990-995
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.990
• Online since: August 2014
• Authors: Yu Xiao Zhao*, Min Tian Gao, Xiao Hui Liang, Hui Mu
• Keywords: Aerobic Granulation, Cerium, Extracellular Polymeric Substances

References

[1] Mishima K, Nakamura M. J. Water Sci Technol. Vol. 23 (1991), pp.981-990.

[2] Shin HS, Lim KH, Park HS. J. Water Sci Technol Vol. 26 (1992), pp.601-605.

[3] Beun JJ, Hendriks A, Van Loosdrecht MCM. J. Water Res Vol. 33 (1999), pp.2283-2290.

[4] Li XM, Liu QQ, Yang Q, Guo L, Zeng GM, Hu JM, Zheng W. J. Bioresour Technol. Vol. 100 (2009), pp.64-67.

[5] Zheng YM, Yu HQ, Liu SJ, Liu XZ. J. Chemosphere. Vol. 63 (2006), pp.1791-1800.

[6] Qin L, Liu Y, Tay JH. J. Biochem Eng. Vol. 21 (2004), pp.47-52.

[7] Tay JH, Liu QS, Liu Y. J. Appl. Microbiol. Biotechnol. Vol. 57 (2001), pp.227-233.

[8] Wang ZP, Liu LL, Yao J, Cai WM. J. Chemosphere. Vol. 63 (2006), pp.1728-1735.

[9] Zhang LL, Feng XX, Zhu NW, Chen JM. J. Enzyme Microb Technol. Vol. 41 (2007), pp.551-557.

[10] Liu Y, Yang SF, Tay JH. J. Biotechnol. Vol. 108 (2004), pp.161-169.

[11] Schwarzenbeck N, Borges JM, Wilderer PA. J. Appl. Microbiol. Biotechnol. Vol. 66 (2005), pp.711-718.

[12] Liu Y, Liu QS. J. Biotechnology Adv. Vol. 24 (2006), pp.115-127.

[13] Rojas E, Lettvin JY, Pickard WF. J. Biochem. Vol. 35 (1981), pp.71-74.

[14] Zhuang QK, Dai HC, Gao XX, Xin WK. J. Bioelectrochemistry. Vol. 52 (2000), pp.37-41.

[15] Hu QH, Lou XS, Ye ZJ. J. Rare earth. Vol. 17 (1996), pp.44-46.