Advanced

Modification of the activated sludge model for chemical dosage

Ma, Shuai; Zeng, Siyu; Dong, Xin; Chen, Jining and Olsson, Gustaf LU (2015) In Frontiers of Environmental Science and Engineering in China 9(4). p.694-701
Abstract
Full-scale experiments have been carried out to adapt the activated sludge model ASM2d to include the influence of metal dosage (Fe3+ and Al3+) for phosphorus removal. Phosphorus removal rates, nitrification rates, as well as pH and sludge settling performance, were evaluated as functions of the metal dosages. Furthermore, models relating certain parameters to the dosage of chemicals have been derived. Corresponding parameters in the ASM2d and the secondary settler models, included in the Benchmark Simulation Model No 1 (BSM1), have been modified to take the metal influence into consideration. Based on the effluent limits and penalty policy of China, an equivalent evaluation method was derived for the total cost assessment. A large number... (More)
Full-scale experiments have been carried out to adapt the activated sludge model ASM2d to include the influence of metal dosage (Fe3+ and Al3+) for phosphorus removal. Phosphorus removal rates, nitrification rates, as well as pH and sludge settling performance, were evaluated as functions of the metal dosages. Furthermore, models relating certain parameters to the dosage of chemicals have been derived. Corresponding parameters in the ASM2d and the secondary settler models, included in the Benchmark Simulation Model No 1 (BSM1), have been modified to take the metal influence into consideration. Based on the effluent limits and penalty policy of China, an equivalent evaluation method was derived for the total cost assessment. A large number of 300-day steady-state and 14-day open-loop dynamic simulations were performed to demonstrate the difference in behavior between the original and the modified BSM1. The results show that 1) both in low and high mole concentrations, Fe3+ addition results in a higher phosphorus removal rate than Al3+; 2) the sludge settling velocity will increase due to the metal addition; 3) the respiration rate of the activated sludge is decreased more by the dosage of Al3+ than Fe3+; 4) the inhibition of Al3+ on the nitrification rate is stronger than that of Fe3+; 5) the total operating cost will reach the minimum point for smaller dosages of Fe3+, but always increase with Al3+ addition. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
activated sludge model, chemical precipitation, benchmark simulation, model, phosphorus removal, respiratory rate, sludge settling
in
Frontiers of Environmental Science and Engineering in China
volume
9
issue
4
pages
694 - 701
publisher
Higher Education Press
external identifiers
  • wos:000357274400015
  • scopus:84934438348
ISSN
2095-2201
DOI
10.1007/s11783-014-0732-3
language
English
LU publication?
yes
id
e7141e72-220d-40ef-b029-f384d25dc1bf (old id 7790703)
date added to LUP
2015-09-03 15:33:01
date last changed
2017-01-01 04:17:27
@article{e7141e72-220d-40ef-b029-f384d25dc1bf,
  abstract     = {Full-scale experiments have been carried out to adapt the activated sludge model ASM2d to include the influence of metal dosage (Fe3+ and Al3+) for phosphorus removal. Phosphorus removal rates, nitrification rates, as well as pH and sludge settling performance, were evaluated as functions of the metal dosages. Furthermore, models relating certain parameters to the dosage of chemicals have been derived. Corresponding parameters in the ASM2d and the secondary settler models, included in the Benchmark Simulation Model No 1 (BSM1), have been modified to take the metal influence into consideration. Based on the effluent limits and penalty policy of China, an equivalent evaluation method was derived for the total cost assessment. A large number of 300-day steady-state and 14-day open-loop dynamic simulations were performed to demonstrate the difference in behavior between the original and the modified BSM1. The results show that 1) both in low and high mole concentrations, Fe3+ addition results in a higher phosphorus removal rate than Al3+; 2) the sludge settling velocity will increase due to the metal addition; 3) the respiration rate of the activated sludge is decreased more by the dosage of Al3+ than Fe3+; 4) the inhibition of Al3+ on the nitrification rate is stronger than that of Fe3+; 5) the total operating cost will reach the minimum point for smaller dosages of Fe3+, but always increase with Al3+ addition.},
  author       = {Ma, Shuai and Zeng, Siyu and Dong, Xin and Chen, Jining and Olsson, Gustaf},
  issn         = {2095-2201},
  keyword      = {activated sludge model,chemical precipitation,benchmark simulation,model,phosphorus removal,respiratory rate,sludge settling},
  language     = {eng},
  number       = {4},
  pages        = {694--701},
  publisher    = {Higher Education Press},
  series       = {Frontiers of Environmental Science and Engineering in China},
  title        = {Modification of the activated sludge model for chemical dosage},
  url          = {http://dx.doi.org/10.1007/s11783-014-0732-3},
  volume       = {9},
  year         = {2015},
}