An economic assessment of the enhanced dewaterability of municipal wastewater sludge following ultrasonic treatment

Seungmin Na; Young Uk Kim; Min Jang; Younggyu Son; Myunghee Lim; Jeehyeong Khim

doi:10.7567/JJAP.53.07KE11

An economic assessment of the enhanced dewaterability of municipal wastewater sludge following ultrasonic treatment

Seungmin Na, Young Uk Kim, Min Jang, Younggyu Son, Myunghee Lim, Jeehyeong Khim

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

This study examined the dewatering behavior of sludge subjected to ultrasonic (US) treatment by measuring capillary suction time (CST) and specific resistance to filtration (SRF). The results revealed a significant decrease in the CST and SRF at high volumetric supplied energy, E_v (> 5,400 kJ L^-1) due to the solubilization of disintegrated sludge floc or suspended solids. Moreover, the decrease in the sludge volume/mass and water content was proportional to E_v. However, the potential to reduce the sludge cake and water content was lower at higher Ev (> 5,400 kJ L ^-1) due to the release of some of the water trapped inside the sludge flocs or cells before sludge compaction. We conclude that selecting the optimal US energy is critical to obtain enhanced dewatering properties and reduced sludge cake. The economic efficiency of incinerating ultrasonically treated sludge cakes was high, with savings of >52% in total treatment costs.

Original language	English
Article number	07KE11
Journal	Japanese journal of applied physics
Volume	53
Issue number	7 SPEC. ISSUE
DOIs	https://doi.org/10.7567/JJAP.53.07KE11
Publication status	Published - 2014 Jul

Bibliographical note

Funding Information:
The authors are grateful to S. Sashidhara, R. Ravi and D. Mollaiah for their willing assistance in the experimental work. Thanks are due to Amy Solana for her generous help in the preparation of the figures and in the calculations. One of the authors (DHS) is grateful to Philip Morris, USA and Chrysalis Technologies Inc. for providing financial support for carrying out this work.

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

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title = "An economic assessment of the enhanced dewaterability of municipal wastewater sludge following ultrasonic treatment",

abstract = "This study examined the dewatering behavior of sludge subjected to ultrasonic (US) treatment by measuring capillary suction time (CST) and specific resistance to filtration (SRF). The results revealed a significant decrease in the CST and SRF at high volumetric supplied energy, Ev (> 5,400 kJ L-1) due to the solubilization of disintegrated sludge floc or suspended solids. Moreover, the decrease in the sludge volume/mass and water content was proportional to Ev. However, the potential to reduce the sludge cake and water content was lower at higher Ev (> 5,400 kJ L -1) due to the release of some of the water trapped inside the sludge flocs or cells before sludge compaction. We conclude that selecting the optimal US energy is critical to obtain enhanced dewatering properties and reduced sludge cake. The economic efficiency of incinerating ultrasonically treated sludge cakes was high, with savings of >52% in total treatment costs.",

author = "Seungmin Na and Kim, {Young Uk} and Min Jang and Younggyu Son and Myunghee Lim and Jeehyeong Khim",

note = "Funding Information: The authors are grateful to S. Sashidhara, R. Ravi and D. Mollaiah for their willing assistance in the experimental work. Thanks are due to Amy Solana for her generous help in the preparation of the figures and in the calculations. One of the authors (DHS) is grateful to Philip Morris, USA and Chrysalis Technologies Inc. for providing financial support for carrying out this work. ",

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AU - Jang, Min

AU - Son, Younggyu

AU - Lim, Myunghee

AU - Khim, Jeehyeong

N1 - Funding Information: The authors are grateful to S. Sashidhara, R. Ravi and D. Mollaiah for their willing assistance in the experimental work. Thanks are due to Amy Solana for her generous help in the preparation of the figures and in the calculations. One of the authors (DHS) is grateful to Philip Morris, USA and Chrysalis Technologies Inc. for providing financial support for carrying out this work.

PY - 2014/7

Y1 - 2014/7

N2 - This study examined the dewatering behavior of sludge subjected to ultrasonic (US) treatment by measuring capillary suction time (CST) and specific resistance to filtration (SRF). The results revealed a significant decrease in the CST and SRF at high volumetric supplied energy, Ev (> 5,400 kJ L-1) due to the solubilization of disintegrated sludge floc or suspended solids. Moreover, the decrease in the sludge volume/mass and water content was proportional to Ev. However, the potential to reduce the sludge cake and water content was lower at higher Ev (> 5,400 kJ L -1) due to the release of some of the water trapped inside the sludge flocs or cells before sludge compaction. We conclude that selecting the optimal US energy is critical to obtain enhanced dewatering properties and reduced sludge cake. The economic efficiency of incinerating ultrasonically treated sludge cakes was high, with savings of >52% in total treatment costs.

AB - This study examined the dewatering behavior of sludge subjected to ultrasonic (US) treatment by measuring capillary suction time (CST) and specific resistance to filtration (SRF). The results revealed a significant decrease in the CST and SRF at high volumetric supplied energy, Ev (> 5,400 kJ L-1) due to the solubilization of disintegrated sludge floc or suspended solids. Moreover, the decrease in the sludge volume/mass and water content was proportional to Ev. However, the potential to reduce the sludge cake and water content was lower at higher Ev (> 5,400 kJ L -1) due to the release of some of the water trapped inside the sludge flocs or cells before sludge compaction. We conclude that selecting the optimal US energy is critical to obtain enhanced dewatering properties and reduced sludge cake. The economic efficiency of incinerating ultrasonically treated sludge cakes was high, with savings of >52% in total treatment costs.

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An economic assessment of the enhanced dewaterability of municipal wastewater sludge following ultrasonic treatment

Abstract

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