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The elemental compositions of P-accumulating microbial granules developed in sequencing batch reactors

Paper ID Volume ID Publish Year Pages File Format Full-Text
36656 45139 2005 5 PDF Available
Title
The elemental compositions of P-accumulating microbial granules developed in sequencing batch reactors
Abstract

The effects of substrate P/COD ratios on the elemental compositions of P-accumulating microbial granules were investigated. Results showed that the substrate P/COD ratio had a significant effect on the elemental compositions of P-accumulating microbial granules. The P content in granules fell into a range of 1.9–9.3% by weight and increased with the increase of substrate P/COD ratio. Chemical precipitation-related P in granules accounted for less than 10% of the total P accumulation, i.e. biological storage was mainly responsible for the observed P accumulation in granules. These indicate that microbial granules cultivated had an excellent ability to uptake phosphorus from liquid solution. According to the elemental analyses, the empirical formulae of P-accumulating granules developed at different substrate P/COD ratios were generated. Significant difference in the elemental compositions between P-accumulating and non-P-accumulating granules was observed, indicating a shift in microbial association. A substantial accumulation of calcium and magnesium ions was found in the P-accumulating granules, and was closely related to the poly-phosphate accumulated in granules. The present results show potential application of microbial granules in enhanced biological phosphorus removal process.

Keywords
P-accumulating granule; Substrate P/COD ratio; Elemental composition
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The elemental compositions of P-accumulating microbial granules developed in sequencing batch reactors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 10, October 2005, Pages 3258–3262
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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