EFFECT OF MICROWAVE AND LYSOZYME JOINT TREATMENT ON THE DEWATERING PERFORMANCE OF PRINTING AND DYEING SLUDGE

LIU Er-yan; XUE Fei; XU Shi-hong; LI Deng-xin

doi:10.13205/j.hjgc.202005003

Volume 38 Issue 5

Aug. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(5): 13-17,42

LIU Er-yan, XUE Fei, XU Shi-hong, LI Deng-xin. EFFECT OF MICROWAVE AND LYSOZYME JOINT TREATMENT ON THE DEWATERING PERFORMANCE OF PRINTING AND DYEING SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 13-17,42. doi: 10.13205/j.hjgc.202005003

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LIU Er-yan, XUE Fei, XU Shi-hong, LI Deng-xin. EFFECT OF MICROWAVE AND LYSOZYME JOINT TREATMENT ON THE DEWATERING PERFORMANCE OF PRINTING AND DYEING SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 13-17,42. doi: 10.13205/j.hjgc.202005003

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EFFECT OF MICROWAVE AND LYSOZYME JOINT TREATMENT ON THE DEWATERING PERFORMANCE OF PRINTING AND DYEING SLUDGE

doi: 10.13205/j.hjgc.202005003

LIU Er-yan^1,2,
XUE Fei^1,2,
XU Shi-hong^{1,2,3,4
,
,},
LI Deng-xin^1,2,3,4

1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China;
2. National Environmental Protection Textile Pollution Prevention Engineering Technology Center, Donghua University, Shanghai 201620, China;
3. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 201620, China;
4. Shanghai Institute of Pollution Control and Ecological Safety, Shanghai 201620, China

Received Date: 2019-01-23

Abstract

Abstract

On the basis of a single factor study, capillary water absorption time (CST), sedimentation curve, scanning electron microscope (SEM), and three-dimensional fluorescence spectra of EPS in printing and dyeing sludge was explored, and the effect of microwave, lysozyme, microwave and lysozyme joint treatment on the dewatering of printing and dyeing sludge was compared. The sludge dewatering performance was characterized by orthogonal test, and the optimal conditions for the joint treatment were: the enzymolysis temperature was 40 ℃, the amount of lysozyme added was 0.09 g/g(TSS), the enzymolysis time was 3 h, the microwave power was 400 W, and the microwave time was 150 s. The single factor experiment results showed that: microwave (400 W, 180 s) and lysozyme (0.09 g/g(TSS), 40 ℃, 4 h) treatment could promote sludge cracking and dissolution of extracellular polymers; under those two conditions, the growth rate of dissolved polysaccharide and total proteins was 609% and 306% respectively; CST was decreased by 12.2% and 22.0%, respectively. At the same time, the joint treatment of microwave and lysozymes increased the dissolve polysaccharides and total proteins by 1353%, and decreased CST by 49.3%,and sludge sedimentation performance was the best then. SEM results showed: the combination of microwave and lysozyme made the structure of the sludge changed obviously. The sludge bacteria micelle was broken, the floc structure became loose, and the intracellular bound water was successfully converted into free water, which was beneficial to the sludge dehydration.
- printing and dyeing sludge,
- microwave,
- lysozyme,
- dehydration performance

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References(19)

References

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