Version 1
: Received: 6 November 2018 / Approved: 13 November 2018 / Online: 13 November 2018 (15:07:58 CET)
How to cite:
Zhang, S.; Huang, W.; Liu, D. Species and Bio-Availability of Inorganic and Organic Phosphorus in Primary, Secondary and Digested Sludge. Preprints2018, 2018110318. https://doi.org/10.20944/preprints201811.0318.v1
Zhang, S.; Huang, W.; Liu, D. Species and Bio-Availability of Inorganic and Organic Phosphorus in Primary, Secondary and Digested Sludge. Preprints 2018, 2018110318. https://doi.org/10.20944/preprints201811.0318.v1
Zhang, S.; Huang, W.; Liu, D. Species and Bio-Availability of Inorganic and Organic Phosphorus in Primary, Secondary and Digested Sludge. Preprints2018, 2018110318. https://doi.org/10.20944/preprints201811.0318.v1
APA Style
Zhang, S., Huang, W., & Liu, D. (2018). Species and Bio-Availability of Inorganic and Organic Phosphorus in Primary, Secondary and Digested Sludge. Preprints. https://doi.org/10.20944/preprints201811.0318.v1
Chicago/Turabian Style
Zhang, S., Wenli Huang and Dongfang Liu. 2018 "Species and Bio-Availability of Inorganic and Organic Phosphorus in Primary, Secondary and Digested Sludge" Preprints. https://doi.org/10.20944/preprints201811.0318.v1
Abstract
The species and bio-availability of phosphorus (P) in primary, secondary and digested sludge were fractionated and further analyzed in this study. Results showed that inorganic P (IP) was the primary P fraction in the secondary sludge and digested sludge, in which non-apatite IP (NAIP) amounted to 91.6% and 69.3% of IP, respectively. Organic P (OP), accounting for about 71.7% of total P (TP), was the dominant P composition in primary sludge. The content of bio-available P was about 9.7, 43.4, 29.8 mg-P/g-TS in primary sludge, secondary sludge and digested sludge, respectively, suggesting secondary sludge is the optimal choice when land application of sewage sludge is taken into consideration, followed by digested sludge and primary sludge. Polyphosphate and orthophosphate, comprising approximately 54.3% and 89.2% of TP, was the dominant P species in the secondary sludge and digested sludge, respectively. Monoester-P (54.6% of TP in extract) and diester- P (24.1%) were identified as OP species in primary sludge by Phosphorus-31 nuclear magnetic resonance (31PNMR). The present results would be helpful for P recovery and recycle from sewage sludge in wastewater treatment plant.
Keywords
Sewage sludge, P bio-availability, P species, SMT protocol
Subject
Engineering, Chemical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
