Influence of sludge layer properties on the hydraulic behaviour of gravel-based vertical flow constructed wetlands for primary treatment of sewage

Khomenko, Olha; Dotro, Gabriela; Jefferson, Bruce; Coulon, Frédéric; Fernández, Y. Bajón

doi:10.1016/j.scitotenv.2019.07.121

Cited by 12 publications

(3 citation statements)

References 15 publications

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“…However, the water sector has adopted many measures in wastewater treatment services, such as the use of advanced technology (e.g. [83,84]), A membrane bioreactor [85], Constructed wetlands [86]. However, judging from the current state of public satisfaction with wastewater treatment [43], the water sector still needs to improve wastewater treatment facilities, technical means, and management decisions.…”

Section: Wastewater Treatment Satisfactionmentioning

confidence: 99%

How do citizens feel about their water services in the water sector? Evidence from the UK

2021

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At present, many studies have used social survey methods to explore UK water citizens’ perceptions of the water sector’s water services, but there are few more targeted and systematic studies. This paper mainly displays the perceptions of UK water citizens on water services in the water sector in recent years and analyses the main reasons for different perceptions and possible strategies. We conduct extensive research from four aspects that are highly related to water services: water citizens’ perceptions of the water supply services and technology application (infrastructure construction) provided by the water sector; the state of communication between the water sector and water citizens and their perceptions of water supply management; water citizens’ perceptions of the comprehensive utilisation of water resources in the water sector; water citizens’ perceptions of the water prices set by the water sector. These discussions aim to discover citizens’ perceptions of the water sector and the effects on the public participation mechanism. These insights help attract the water sector’s attention so that the public’s opinions can genuinely support water policymakers and provide sure support for the water sector to formulate corresponding solutions.

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Section: Wastewater Treatment Satisfactionmentioning

confidence: 99%

How do citizens feel about their water services in the water sector? Evidence from the UK

2021

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“…To assess the ability of the sludge to retain specific elements including trace metals under both normal operating conditions and extreme pH conditions, samples from the wetlands noted above were examined for leaching (Kania, Gautier, Blanc, et al, 2019). The sludge layer properties, in particular permeability, were examined for their potential influence on hydraulic behavior in gravel‐based vertical flow constructed wetlands indicating increased organic matter improved permeability by three times, while total solids increase reduced permeability; improvements in mineralization related to drying kinetics was also described (Khomenko, Dotro, Jefferson, Coulon, & Bajon Fernandez, 2019). A horizontal subsurface flow constructed wetland was evaluated based on chemical and physical performance by Vasconcellos, von Sperling, and Ocampos (2019).…”

Section: Sludge To Biosolids: Treatment Advancesmentioning

confidence: 99%

Residuals, sludge, and biosolids: Advancements in the field

Brisolara

Gentile

Puszykowski

et al. 2020

Water Environment Research

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Advancements in the field of residuals, sludge, and biosolids have been made in 2019. This review outlines the major contributions of researchers that have been published in peer-reviewed journals and conference proceedings throughout 2019 and includes brief summaries from over 125 articles. The review is organized in sections including life cycle and risk assessments; characteristics, quality, and measurement including micropollutants, nanoparticles, pathogens, and metals; sludge treatment technologies including dewatering, digestion, composting, and wetlands; disposal and reuse including adsorbents, land application and agricultural uses, nutrient recovery, and innovative uses; odor and air emissions; and energy issues.

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“…In this scenario, the top boundary of the water ponding is assumed to be in the fixedmesh form, where the water level is constant throughout the simulation. In addition, the build-up of sludge deposits on the top surface of STRB also changes the simulation mesh [11]. Therefore, researchers have developed the adaptive meshes refinement (AMR) scheme to improve the conventional fixed meshes scheme [12].…”

Section: Introductionmentioning

confidence: 99%

Modelling of Hydraulic Dynamics in Sludge Treatment Reed Beds with Moving Boundary Condition

et al. 2023

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The conventional method of simulation using fixed mesh method (FMM) of discretization is a well-known and trusted procedure in modelling hydraulic dynamics. However, new ideas of innovation in modelling should be advanced. The moving mesh method (MMM) has been considered as a novel approach in modelling hydraulic dynamics after depending on the existing simulation model for decades. The MMM is capable of describing the moving boundary condition of an actual wetland system due to water ponding. An idealized model should be able to simulate the actual hydraulic flows through the system with the corresponding porosity. Hence, a combination of MMM and FMM (MM-FMM) of discretization for hydraulic dynamics is studied in this project to model the flux with respect to water ponding scenario in a sludge treatment reed bed and unsaturated transient flow within the bed. Such method has evidently proved to simulate the actual hydraulic flows in contrast to conventional method. The application of MMM limits the maximum flux to keep within its saturated conductivity, thus reduces the effect of flow overprediction. Subsequently, the simulated results for hydraulic head and moisture content can be predicted for actual condition of different cases according to their respective fluxes.

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Influence of sludge layer properties on the hydraulic behaviour of gravel-based vertical flow constructed wetlands for primary treatment of sewage

Abstract: Influence of sludge layer properties on the hydraulic behaviour of gravel-based vertical flow constructed wetlands for primary treatment of sewage.

Cited by 12 publications

References 15 publications

How do citizens feel about their water services in the water sector? Evidence from the UK

How do citizens feel about their water services in the water sector? Evidence from the UK

Residuals, sludge, and biosolids: Advancements in the field

Modelling of Hydraulic Dynamics in Sludge Treatment Reed Beds with Moving Boundary Condition

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