Influence of anoxic to aerobic volume ratio on sludge settleability and bacterial community structure in a denitrifying–nitrifying activated sludge system

Chen, Xi; Yuan, Linjiang; Lv, Jinghua; Nie, Kun

doi:10.1080/19443994.2014.958104

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…Research has shown that a higher anoxic/aerobic ratio results in improved efficiency in the removal of biological nitrogen [69]. Here, the ratio is around 2, which accounts for the enhanced nitrogen removal effectiveness when there is a large volume in the anoxic stage.…”

Section: Discussionmentioning

confidence: 98%

Excess of Nutrients in Prefabricated or Compact Wastewater Treatment Plants: Review, Solution Alternative, and Modeling for Verification

Díaz,

Blanco,

Chandia-Jaure

et al. 2024

Water

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Chile has numerous areas that lack sewage collection, including in the capital city. Sanitation in these cases is managed through individual solutions like septic tanks or small wastewater treatment plants (WWTPs) that use biological treatment, usually activated sludge with extended aeration. In general, the design of these systems adheres to the quality standards mandated by regulations for discharge, infiltration, or irrigation. In this scenario, traditional methods like increasing dissolved oxygen (DO) or hydraulic retention time (HRT) were unable to effectively reduce excessive nutrients. Therefore, literature related to nutrient excess and denitrification systems is consulted and reviewed to compile different solutions suitable for the presented issue. Potential solutions were modeled and verified using the free simulation software WRc STOAT. The software accurately predicted the unsatisfactory results of the current setup and provided parameters for the proposed modifications. Experience, precise user definition, influential characteristics, and modeling are essential in the design of WWTPs.

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Section: Discussionmentioning

confidence: 98%

Excess of Nutrients in Prefabricated or Compact Wastewater Treatment Plants: Review, Solution Alternative, and Modeling for Verification

Díaz,

Blanco,

Chandia-Jaure

et al. 2024

Water

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Efficient nitrogen removal from municipal wastewater using an integrated fixed-film activated sludge process in a novel air-lifting loop reactor: A pilot-scale demonstration

Liu,

Li,

et al. 2024

Journal of Environmental Management

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Strategies for Controlling Filamentous Bulking in Activated Sludge Wastewater Treatment Plants: The Old and the New

Sam

Roes‐Hill

Hoosain

et al. 2022

Water

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Filamentous bulking and foaming are the most common settling problems experienced in activated sludge (AS) wastewater treatment plants (WWTPs). The quality of the final effluent is poor during episodes of bulking and foaming, which is an environmental, human health and economic burden. Remedial measures are often ineffective, and traditional non-specific methods such as chlorination may also negatively impact important functional bacterial species such as nitrifiers. Modifications to older methods as well as new strategies are required for controlling filamentous bulking. Laboratory testing needs to be followed by testing at scale in WWTPs. This review describes the filamentous bacteria responsible for filamentous bulking, with a focus on their global distribution and known factors which are selective for the growth of specific filaments. Traditional and new non-specific and biological control strategies are reviewed and discussed. Research gaps are identified with the aim of promoting continued efforts to establish effective control strategies for filamentous sludge bulking.

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Influence of anoxic to aerobic volume ratio on sludge settleability and bacterial community structure in a denitrifying–nitrifying activated sludge system

Cited by 3 publications

References 37 publications

Excess of Nutrients in Prefabricated or Compact Wastewater Treatment Plants: Review, Solution Alternative, and Modeling for Verification

Excess of Nutrients in Prefabricated or Compact Wastewater Treatment Plants: Review, Solution Alternative, and Modeling for Verification

Efficient nitrogen removal from municipal wastewater using an integrated fixed-film activated sludge process in a novel air-lifting loop reactor: A pilot-scale demonstration

Strategies for Controlling Filamentous Bulking in Activated Sludge Wastewater Treatment Plants: The Old and the New

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