Insights into the potential application of magnetic field in controlling sludge bulking and foaming: A review

Zaidi, Nur Syamimi; Syafiuddin, Achmad; Bahrodin, Muhammad Burhanuddin; Zhan, Loh Zhang; Ratnasari, Anisa; Kadier, Abudukeremu; Mehmood, Muhammad Aamer; Boopathy, Raj

doi:10.1016/j.biortech.2022.127416

Cited by 16 publications

(2 citation statements)

References 106 publications

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“…The water from floater 1 had a greater capacity to improve SV than that from floater 2. In addition, a low F/M ratio, high or low DO, suspended residence time (SRT), carbon to nitrogen ratio (C/N), pH, sludge concentration, and other factors in sludge culture contribute to bulking (Zaidi et al, 2022). Because floaters 1 and 2 were linked in series, the Fe and COD concentrations in the No.…”

Section: E Ect Of Influent Fe On Sludge Svmentioning

confidence: 99%

Fe controls the reproduction of zoogloea and sludge bulking in oil-in-iron wastewater

Shi,

Su,

Tao

et al. 2023

Front. Water

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Following the final biological treatment, the oil wastewater is intended for reuse in factory floor cleaning. However, the presence of varying concentrations of oil-in-iron characteristic wastewater has led to a sudden surge in sludge SV to 90%, adversely affecting water treatment efficiency. In this study, we conducted an analysis of microbial community structure and selected pepA and 16S rRNA primers to assess the proportions of zoogloea and total bacteria in sludge bulking. Iron concentration plays a pivotal role, and it should be maintained at or 0.6 mgL−1. By selective discharging of sludge to maintain 1,700 mgL−1, we minimized iron enrichment, thereby enhancing the sludge settling performance. Maintaining dissolved oxygen (DO) at 3.5 mgL−1 supports the aerobic sludge's ability to replenish iron in its system, while the oil content should be controlled at 145.33 mgL−1 to reduce the release of iron into the water. The order of significance is as follows: sludge concentration > Fe amount > DO > oil content. Implementing this approach was applied in the field for 1 week and effectively reduced the SV from 90% to approximately 43%. The interaction between quorum sensing molecules related to sludge bulking and iron, leading to the formation of complexes, underscores the significance of controlling iron levels. This study offers a valuable case for practical application of quorum quenching technology in oil wastewater, presenting a rapid, efficient, and cost-effective solution to address the issue of sludge bulking.

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Section: E Ect Of Influent Fe On Sludge Svmentioning

confidence: 99%

Fe controls the reproduction of zoogloea and sludge bulking in oil-in-iron wastewater

Shi,

Su,

Tao

et al. 2023

Front. Water

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“…The effect of chemical reagents on them is virtually unacceptable due to possible contamination of water, which, after treatment, necessarily enters the environment [6]. Existing physical methods of water purification, such as electric spark discharges [7], magnetic fields [8,9], etc. are undoubtedly effective but extremely energy-intensive.…”

Section: Introductionmentioning

confidence: 99%

Design peculiarities and mathematical model of an enhanced low-frequency vibratory cavitation device

Aftanaziv,

Korendiy,

Kachur

et al. 2023

Vib. proced.

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The thorough analysis of the technological processes used to purify the wastewater from food and processing enterprises (bakery, brewery, coffee, sugar, beverage, etc.) has established that among the most effective processes are the physical ones. From the wide range of physical methods of wastewater treatment, the cavitation treatment methods are of the most promising from the viewpoint of industrial application. The present paper considers an enhanced design of a low-frequency vibratory cavitation device with an electromagnetic drive. Unlike many other cavitators of ultrasonic or hydrodynamic action, the proposed vibratory cavitation device can treat the wastewater in a continuous liquid flow, has no rotating components and parts, which significantly increases its reliability and durability, and can be equipped with changeable concaves (grates) depending on the pollutants to be purified. The research methodology consists of two main stages: development of the dynamic diagram and mathematical model of the considered cavitation device; numerical simulation of the working members vibrations at different operational conditions. The obtained results are presented in the form of time dependencies of the concaves (grates) displacements, speeds, and accelerations under various viscous friction and excitation parameters. The main scientific novelty of this study, in addition to the improved design of the vibratory cavitator, is considering the influence of the changeable electromagnetic excitation force and viscous friction force on the dynamic behavior of the concaves (grates). Further investigations on the present topic can be focused on the practical implementation and experimental testing of the proposed cavitation device in order to increase the water purification degree.

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An Overview of the Potential for Municipal Wastewater Treatment Plants to Be Integrated into Urban Biorefineries for the Production of Sustainable Bio-Based Fuels and Other Chemicals

Shrestha,

Foret,

Sharp

et al. 2024

Curr Pollution Rep

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Insights into the potential application of magnetic field in controlling sludge bulking and foaming: A review

Cited by 16 publications

References 106 publications

Fe controls the reproduction of zoogloea and sludge bulking in oil-in-iron wastewater

Fe controls the reproduction of zoogloea and sludge bulking in oil-in-iron wastewater

Design peculiarities and mathematical model of an enhanced low-frequency vibratory cavitation device

An Overview of the Potential for Municipal Wastewater Treatment Plants to Be Integrated into Urban Biorefineries for the Production of Sustainable Bio-Based Fuels and Other Chemicals

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