Enhanced biological phosphorus removal by granular sludge: from macro- to micro-scale

Water Research
Chang-Yong WuYong Ma

Abstract

In this study, phosphorus accumulating microbial granules were successfully cultivated in a sequencing batch reactor (SBR) using synthetic wastewater. The average diameter of the granules was 0.74 mm and the diameter distribution fitted well with normal distribution with a correlation coefficient of 0.989. Good performance of biological phosphorus removal (BPR) was obtained in the granular system. The average phosphorus removal efficiency was over 94.3% and the level of phosphorus in the effluent was below 0.50mg/L during 300 days of operation. Particle analysis showed that positive charged particles were formed with the release of phosphorus in the anaerobic stage. These particles served as the cores of granules and stimulate the granulation. The maturated granules had a well-formed micro-pore structure with an average pore width between 291.5 nm and 446.5 nm. The spatial distribution of phosphorus decreased gradually from the surface to the center of the granules. Smaller granules had a higher specific area, pore width and phosphorus removal activity than bigger granules.

Citations

Oct 12, 2012·Environmental Science and Pollution Research International·Liang ZhuXiangyang Xu
Jul 11, 2012·Water Research·Thomas SeviourYuemei Lin
Oct 26, 2014·Applied Microbiology and Biotechnology·Dandan ZhouShanshan Dong
Dec 3, 2014·Bioresource Technology·Chunli WanXiang Liu
May 19, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Changyong WuJiamei Song
Mar 1, 2012·Water Environment Research : a Research Publication of the Water Environment Federation·Ying Hui OngMohd Ali Hashim
Dec 6, 2021·The Science of the Total Environment·Lijuan DengQuan Wang

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