Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
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Conditioning of Excess Sludge by Fe2+ Activated Peroxymonosulfate
DOI:
10.16355/j.cnki.issn1007-9432tyut.2019.03.008
Received:
Accepted:
| Corresponding author | Institute | |
| SONG Xiulan | College of Environmental Science and Engineering, Taiyuan University of Technology |
abstract:
In this study, the sludge from the sludge concentration tank was used as the research object, and the excess sludge was conditioned by the Fe^2+ activated peroxymonosulfate (HSO5^- PMS) oxidation method. Studied were the effects of Fe^2+/PMS molar ratio, PMS dosage, initial pH, Fe^2+ addition method and temperature on sludge dewatering performance. The results show that the influence degree of each factor on the reduction rate of SRF was: PMS dosage>pH value>Fe^2+/HSO5^- molar ratio;The best conditions for sludge dewatering performance:temperature 25 ℃, n (Fe^2+)/ n (HSO5^-) molar ratio 1∶1, PMS concentration 1.2 mmol/g TSS, pH not adjusted, and Fe^2+ added once. Under these conditions the specific resistance of sludge was reduced by 90.98 %. The EPS of the sludge before and after conditioning was analyzed by three-dimensional fluorescence spectrometry. The improvement of sludge dewatering performance was related to LB-EPS and TB-EPS. And some LB-EPS and TB-EPS were oxidatively degraded by Fe^2+-activated PMS, releasing a large amount of bound water, thus improving the sludge dewatering performance.
Keywords:
excess sludge;Fe^2+;PMS;dewatering performance