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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Effect of Microwave-coupled Fe0/H2O2on Excess Sludge Dewaterability
DOI:
10.16355/j.cnki.issn1007-9432tyut.2021.01.007
Received:
Accepted:
| Corresponding author | Institute | |
| DUAN Yun | College of Environmental Science and Engineering, Taiyuan University of Technology |
abstract:
The effects of initial pH, microwave power, reaction time, H2O2 dosage, and Fe0 dosage in microwave-coupled Fe0/H2O2(MW-Fe0/H2O2) Fenton-like process on sludge dewaterability were systematically investigated by the specific resistance to filtration(SRF), water content of sludge cake, and capillary suction time(CST). And the mechanism of MW-Fe0/H2O2 improving sludge dewaterability was analyzed by analogy experiment. Results show that the reduction of SRF, water content of sludge cake, and CST were 90.5%, 15.5%, and 63.3%, respectively, at initial pH of 3, microwave power of 400 W, reaction time of 150 s, H2O2 dosage of 90 mg/g, and Fe0 dosage of 60 mg/g. The analysis of extracellular polymeric substances(EPS) components indicates that the reduction of protein and polysaccharide in TB-EPS was positively related to the improvement of sludge dewaterability. Three-dimensional fluorescence spectrometry(3 D-EEM) analysis demonstrates that soluble microbial byproduct and tryptophan protein in TB-EPS were oxidatively degraded, thus improving the sludge dewaterability.
Keywords:
sludge dewaterability; microwave; zero valent iron; EPS;