Relationship between the effect of intermittent ultra-sonication and specific energy on degree of disintegration of secondary sludge

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Fathali Davoud; Rashidi Mehrabadi Abdollah; MIRABI MARYAM; ALIMOHAMMADI MAHMOOD

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Journal: Journal of Environmental Studies Year:2018 | Volume:44 | Issue:2 Page(s): 297-308

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Information Journal Paper

Title

Relationship between the effect of intermittent ultra-sonication and specific energy on degree of disintegration of secondary sludge

Author(s)

Fathali Davoud | Rashidi Mehrabadi Abdollah | MIRABI MARYAM | ALIMOHAMMADI MAHMOOD | Issue Writer Certificate

Keywords

degree of disintegrationQ1

intermittent sonicationQ2

respond surface methodQ1

sludge disintegrationQ1

specific energyQ1

ultrasonicQ1

Abstract

Introduction Disintegration of excess sludge from activated sludge units for production of a carbon source in post-anoxic processes in order to remove nutrients from wastewater streams has been widely used in recent years. For this purpose, ultra-sonication is one of the most applicable methods for disintegration of cell membranes to provide carbon, the source from disruption of microorganisms. Such substances extracted from disintegrated sludge can be used as readily bio-degradable sources of carbon to be used by other microorganisms in following process units. The amount of power (P) per volume (V) applied to the samples in specific durations (t) as well as the concentration of sludge is the most dominant factors in determination of the disintegration process. The main hypothesis of this research is that if the sonication of samples is intermittent during the total time of ultrasonic radiation, the defensive mechanism of cells will be weakened due to irregular forces applied to the cell membrane. This will lead to degradation of microorganisms at lower specific energy (Es) while the energy consumption in the whole process will be reduced accordingly. The effect of this parameter has been investigated through this research, whilst no research has been focused upon this issue earlier in previous studies. In this research, samples of secondary sludge have been disintegrated at the frequency of 24 kHz while the applied power, time of sonication and sludge concentration were changed for each set of experiment. As an extra independent variable, intermittent sonication was altered from 0. 3 to 0. 9 second. degree of disintegration (DD) was monitored as a dependent variable to evaluate the efficiency of the sludge disintegration process...

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APA: Copy

Fathali, Davoud, Rashidi Mehrabadi, Abdollah, MIRABI, MARYAM, & ALIMOHAMMADI, MAHMOOD. (2018). Relationship between the effect of intermittent ultra-sonication and specific energy on degree of disintegration of secondary sludge. JOURNAL OF ENVIRONMENTAL STUDIES, 44(2 ), 297-308. SID. https://sid.ir/paper/3182/en

Vancouver: Copy

Fathali Davoud, Rashidi Mehrabadi Abdollah, MIRABI MARYAM, ALIMOHAMMADI MAHMOOD. Relationship between the effect of intermittent ultra-sonication and specific energy on degree of disintegration of secondary sludge. JOURNAL OF ENVIRONMENTAL STUDIES[Internet]. 2018;44(2 ):297-308. Available from: https://sid.ir/paper/3182/en

IEEE: Copy

Davoud Fathali, Abdollah Rashidi Mehrabadi, MARYAM MIRABI, and MAHMOOD ALIMOHAMMADI, “Relationship between the effect of intermittent ultra-sonication and specific energy on degree of disintegration of secondary sludge,” JOURNAL OF ENVIRONMENTAL STUDIES, vol. 44, no. 2 , pp. 297–308, 2018, [Online]. Available: https://sid.ir/paper/3182/en

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