Paper Title:
Formation and Characteristics of Aerobic Granular Sludge for Simultaneous Phosphorus and Nitrogen Removal in a SBR
  Abstract

With inoculum sludge from a conventional activated sludge wastewater treatment plant, formation of aerobic granular sludge for simultaneous phosphorus and nitrogen removal was realized in a sequencing batch reactor by the selective pressure as a driving force. Selective pressure created by means of decreasing sedimentation time and increasing substrate loading enhanced the formation of aerobic granular sludge, which followed four consecutive stages: acclimation, granulation, growth and maturation. Under the condition that the substrate loading were increased to 500mg COD/(L•d) and 48mg NH4 +-N/(L•d), the granules were the dominant sludge forms with most of diameter about 0.5–2.0 mm, a minimal settling velocity of 0.55 cm/s and a MLSS of 6800 mg/L after 120 days operation. The granules were composed of filamentous species with varying degrees of rod- and coccal-type bacteria. Microscopic examination revealed that granules microecosystem was more stable and should be less vulnerable to the changes of mixed liquor condition.

  Info
Periodical
Advanced Materials Research (Volumes 356-360)
Chapter
Chapter 7: Pollution Control Project (Air, Water, Solid)
Edited by
Hexing Li, Qunjie Xu and Daquan Zhang
Pages
1630-1636
DOI
10.4028/www.scientific.net/AMR.356-360.1630
Citation
G. J. Yang, X. M. Li, Q. Yang, K. Luo, "Formation and Characteristics of Aerobic Granular Sludge for Simultaneous Phosphorus and Nitrogen Removal in a SBR", Advanced Materials Research, Vols. 356-360, pp. 1630-1636, 2012
Online since
October 2011
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Price
$32.00
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