Startup of Simultaneous Low Dissolved Oxygen Coupled with Low F/M System and the Prevention of Sludge Bulking by Acclimating Limited-Mineralization Sludge with Higher-Concentration

Cheng Jin Zhou; Wen Jie He; Tian Tian Zhang; Hai Ning Tian

doi:10.4028/www.scientific.net/AMR.518-523.3476

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 518-523Startup of Simultaneous Low Dissolved Oxygen...

Startup of Simultaneous Low Dissolved Oxygen Coupled with Low F/M System and the Prevention of Sludge Bulking by Acclimating Limited-Mineralization Sludge with Higher-Concentration

Abstract:

It is significant to realize stable operation of the simultaneous low dissolved oxygen coupled with low F/M system. Two acclimation modes including 1) reducing DO firstly and then adjusting the F/M , and 2)reducing the F/M firstly and then adjusting DO were conducted. The results showed that the first operation mode was prone to induce high-viscosity sludge bulking at the reaction temperature of 9~10°C and filamentous bulking under low F/M of 0.08~0.1kgCOD/kgMLSS•d at 20±1°C。However, good settling performance and effluent were achieved under the second operation mode. It is proposed to culture limited-mineralization activated sludge with higher-concentration to realize the prevention of sludge bulking.

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Periodical:

Advanced Materials Research (Volumes 518-523)

Pages:

3476-3482

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.518-523.3476

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Online since:

May 2012

Authors:

Cheng Jin Zhou, Wen Jie He, Tian Tian Zhang, Hai Ning Tian

Keywords:

Limited-Mineralization Activated Sludge, Low DO, Low F/M

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