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Calcium spatial distribution in aerobic granules and its effects on granule structure, strength and bioactivity

Authors
Publisher
Pergamon
Publication Date
Keywords
  • Calcium-Rich Aerobic Granules Were Cultivated After 3-Month Operation
  • The Chemical Form And Spatial Distribution Of Calcium In The Granules And Their Physicochemical Char
  • Examination With A Scanning Electron Microscope Combined Energy Dispersive X-Ray Detector (Sem–Edx
  • Caco3 Was Found To Be The Main Calcium Precipitate In The Granules
  • The Fluorescent In Situ Hybridization (Fish) Analysis Shows That The Cells Were Crowded In The Outer
  • Compared With The Granules Without Ca Accumulation
  • The Ca-Rich Granules Had More Rigid Structure And A Higher Strength
  • However
  • Their Specific Oxygen Uptake Rate (Sour) Reduced After The Ca Accumulation Inside Them
  • Comparison Between The Sour Values Of The Granules With And Without Ca Accumulation Suggests That Ca
Disciplines
  • Chemistry

Abstract

Calcium spatial distribution in aerobic granules and its effects on granule structure, strength and bioactivity - DTU Orbit (25/05/14) Calcium spatial distribution in aerobic granules and its effects on granule structure, strength and bioactivity - DTU Orbit (25/05/14) Calcium spatial distribution in aerobic granules and its effects on granule structure, strength and bioactivity Calcium-rich aerobic granules were cultivated after 3-month operation. The chemical form and spatial distribution of calcium in the granules and their physicochemical characteristics were explored. Examination with a scanning electron microscope combined energy dispersive X-ray detector (SEM–EDX) shows that Ca was mainly accumulated in the core of the granules. CaCO3 was found to be the main calcium precipitate in the granules. The fluorescent in situ hybridization (FISH) analysis shows that the cells were crowded in the outer layer and gathered in clusters. Compared with the granules without Ca accumulation, the Ca-rich granules had more rigid structure and a higher strength. However, their specific oxygen uptake rate (SOUR) reduced after the Ca accumulation inside them. Comparison between the SOUR values of the granules with and without Ca accumulation suggests that Ca accumulated in the aerobic granules might have a negative effect on their bioactivity. General information State: Published Organisations: University of Science and Technology of China, School of Environmental Sciences, Beijing Normal University, Beijing 100875, China Authors: Ren, T. (Ekstern), Liu, L. (Intern), Sheng, G. (Ekstern), Liu, X. (Ekstern), Yu, H. (Ekstern), Zhang, M. (Ekstern), Zhu, J. (Ekstern) Pages: 3343-3352 Publication date: 2008 Main Research Area: Technical/natural sciences Publication information Journal: Water Research Volume: 42 Journal number: 13 ISSN (Print): 0043-1354 Ratings: FI (2012): 2 ISI indexed (2012): yes FI (2011): 2 ISI indexed (2011): yes FI (2010): 2 FI (2009): 2 FI (2008): 2 Original language: Engl

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