Effects of the Combined Utilization of Ultrasonic/Hydrogen Peroxide on Excess Sludge Destruction

Centre for Technology in Water and Wastewater Treatment, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2220, Australia

Authors to whom correspondence should be addressed.

Water 2021, 13(3), 266; https://doi.org/10.3390/w13030266

Received: 12 December 2020 / Revised: 9 January 2021 / Accepted: 18 January 2021 / Published: 22 January 2021

(This article belongs to the Section Wastewater Treatment and Reuse)

View Full-Text Download PDF

Browse Figures

Citation Export

Abstract

Excess sludge reduction has been a research hotspot for a long time. Ultrasonic treatment of excess sludge was an efficient and green pretreatment method, and also can be combined with the addition of oxidants. To improve the effect of ultrasound treatment on sludge destruction, hydrogen peroxide (H₂O₂) was added to examine the combined results in the current study. The effects of the ultrasound/hydrogen peroxide system on the release of sludge organic matter during the destruction process were studied. Single-factor experiments were carried out to determine the optimal operating conditions. With the initial pH of 11.0, H₂O₂ concentration of 0.5 mmol/L, initial sludge concentration of 17 g/L, and 15 min ultrasonic treatment, the maximum soluble chemical oxygen demand (ΔSCOD) in the sludge supernatant after destruction was achieved at 3662.78 ± 239.21 mg/L, with a disintegration degree of 28.61 ± 2.14%, sludge reduction rate of 19.47 ± 0.82%, and the change of mixture sludge concentration (ΔMLSS) of 3.31 ± 0.06 g/L. Meanwhile, the release of nitrogen and phosphorus were greatly improved. Under the optimal conditions, the release of total nitrogen (TN), ammonia nitrogen (NH₃-N) and total phosphorus (TP) were 282.30 ± 24.06 mg/L, 25.68 ± 2.09 mg/L, and 105.69 ± 7.84 mg/L, respectively. The current work had provided solid evidence showing the addition of hydrogen peroxide can effectively strengthen the treatment effects of ultrasound on sludge destruction. View Full-Text

Keywords: sludge destruction; sludge reduction; ultrasound; hydrogen peroxide; lysis

▼ Show Figures

Figure A1

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

Share and Cite

MDPI and ACS Style

Yuan, D.; Zhou, X.; Jin, W.; Han, W.; Chi, H.; Ding, W.; Huang, Y.; He, Z.; Gao, S.; Wang, Q. Effects of the Combined Utilization of Ultrasonic/Hydrogen Peroxide on Excess Sludge Destruction. Water 2021, 13, 266. https://doi.org/10.3390/w13030266

AMA Style

Yuan D, Zhou X, Jin W, Han W, Chi H, Ding W, Huang Y, He Z, Gao S, Wang Q. Effects of the Combined Utilization of Ultrasonic/Hydrogen Peroxide on Excess Sludge Destruction. Water. 2021; 13(3):266. https://doi.org/10.3390/w13030266

Chicago/Turabian Style

Yuan, Dehao, Xu Zhou, Wenbiao Jin, Wei Han, Huizhong Chi, Wanqing Ding, Yan Huang, Zhongqi He, Shuhong Gao, and Qilin Wang. 2021. "Effects of the Combined Utilization of Ultrasonic/Hydrogen Peroxide on Excess Sludge Destruction" Water 13, no. 3: 266. https://doi.org/10.3390/w13030266

Find Other Styles

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Abstract views Pdf views Html views

Article Menu

Effects of the Combined Utilization of Ultrasonic/Hydrogen Peroxide on Excess Sludge Destruction

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Article Access Map by Country/Region

Further Information

Guidelines

MDPI Initiatives

Follow MDPI