Phosphorus Migration and Transformation in Activated Sludge by Ultrasonic Treatment

Huaixing Yu, Yuhao Yang, Xueya Wu, Weifang Yuan, Hao Wang, Huanzhong Deng, Lianpeng Sun and Ruohong Li ()
Additional contact information
Huaixing Yu: Department of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
Yuhao Yang: Department of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
Xueya Wu: Department of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
Weifang Yuan: Guangdong Guangye Environmental Protection Industry Group Co., Ltd., Guangzhou 510180, China
Hao Wang: Guangdong Guangye Environmental Protection Industry Group Co., Ltd., Guangzhou 510180, China
Huanzhong Deng: Department of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
Lianpeng Sun: Department of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
Ruohong Li: Department of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China

Sustainability, 2022, vol. 14, issue 18, 1-13

Abstract: Ultrasonic treatment is an effective method to disintegrate sludge and extract organic matter and nutrients, including nitrogen and phosphorus, from the sludge. This study investigated the transformation of phosphorus species during the ultrasonic treatment of sludge, to reveal the mechanism of phosphorus migration in the activated sludge structure. The experimental results indicated that power density and ultrasonic time were critical parameters affecting the energy input for sludge integration. The optimal phosphorus release performance was achieved at 2.5 W/mL 10 min. The release of phosphorus showed as a layer-by-layer pattern from the inner sludge core to the outer sphere of the multiple-layer structure of the sludge. The complex sludge structure played an important role in buffering the ultrasonication process and transfer of phosphorus. Mg-P, Ca-P, and organic phosphorus are the main phosphorus species that can be extracted from the sludge core into the supernatant. The three-stage process of phosphorus migration through the sludge layers, including dissolution, reprecipitation, and equilibrium, has been revealed.

Keywords: phosphorus recovery; ultrasonic treatment; activated sludge; resource recovery (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/18/11224/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/18/11224/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:18:p:11224-:d:909247

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().