Microbial Community Dynamics and Nutrient Removal Performances in A²O System Using Ultrasonic-Disintegrated Sludge Supernatant as Internal Carbon Source

Abstract:

Ultrasonic-disintegrated sludge supernatant was supplemented into A²O system to assess the effects on nutrient removal performances and microbial community changes. In this experiment, easily biodegradable organics accounted for 50.6% of sludge supernatant, indicating its potential for biological nutrient removal. Simultaneously, during two-month operational period, the ammonia nitrogen (NH₄⁺-N) and total phosphorus (TP) removal efficiencies improved to 92.3% and 93.5% from75.6% and 53.4%. Duo to the application of sludge supernatant, two microbial phyla, Proteobacteria and Actinobacteria, were primarily responsible for the biological nutrient removal. In particular, the sludge supernatant was selective for ammonia oxidizing bacteria Comamonas sp. and denitrifying phosphate accumulating organisms Sphingobacterium.

• Periodical: Advanced Materials Research (Volume 777)
• Pages: 196-200
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.777.196
• Online since: September 2013
• Authors: Ya Li Liu, Yi Xing Yuan, Mao An Du
• Keywords: Carbon Source, Microbial Community, Nutrient Removal, Ultrasonic Disintegration, Waste Activated Sludge

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