Phosphorus Releasing from Surplus Activated Sludge by Ultrasonic Pretreatment

Abstract:

Three kinds of surplus activated sludge were pretreated by alkali and combination of alkali and ultrasonic. The changes of PO₄³-P, TP, SCOD, TOC, TS, VS before and after pretreatment were investigated. The results showed that phosphorus and organic matter could be released into supernatant both by alkali and ultrasonic. The surplus activated sludge from municipal wastewater treatment plant was easier to be broken than that from pharmaceutical wastewater treatment plant. The activated sludge from Qinghe wastewater treatment plant could be selected for further phosphorus recovery since the largest quantity of phosphorus release and the lowest organic matter release ratio among the three kinds of surplus activated sludge.

• Periodical: Advanced Materials Research (Volume 878)
• Pages: 702-707
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.878.702
• Online since: January 2014
• Authors: Chang Liu, Ping Zeng, Yong Hui Song, Jian Guang Cheng, Chao Wei Zhu, Xiao Ling Liu, Feng Qian
• Keywords: Alkali, Release of Phosphorus, Ultrasonic, Waste Activated Sludge

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