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Enhancement of Ultraviolet Disinfection of Wastewater by High Pressure Water Jet Pretreatment: Preliminary Results and a New Approach
Publisher: American Society of Civil Engineers
Abstract: The shield or shadow effect of large particles on bacteria undergoing irradiation from ultraviolet light in effluent of treated wastewater would greatly reduce the effectiveness of ultraviolet disinfection. The objective ...
Enhancing Sedimentation and Trapping Sediment with a Bottom Grid Structure
Publisher: American Society of Civil Engineers
Abstract: One of the great challenges of gravity settling is the difficulty of effectively removing suspended solids from the water column and retaining the settled particles in the settling basin under high inflow rates and short ...
Vortex Plate for Enhancing Particle Settling
Publisher: American Society of Civil Engineers
Abstract: The feasibility of enhancing suspended solids settling by using the newly proposed vortex plates in clarifiers, instead of conventional smooth lamellae, was studied using computational fluid dynamics (CFD) modeling and ...
Potential Errors and Error Propagation in Methods Used to Determine Particle Removal Efficiency
Publisher: American Society of Civil Engineers
Abstract: There are many formulas that can be applied under field and laboratory conditions to determine the percent particle removal efficiency (PPRE). A lack of understanding of the limitations of each formula leads to improper ...
Enhancement of Ultraviolet Disinfection of Wastewater by Low Pressure Water Jet Pretreatment: Effectiveness and Impacts on Bacteria
Publisher: American Society of Civil Engineers
Abstract: It has been proven that the concept of using a high pressure water jet (HPWJ) to pretreat wastewater for the enhancement of ultraviolet (UV) disinfection of wastewater is an effective and cost-efficient alternative compared ...
Muskingum Model for Furrow Irrigation
Publisher: American Society of Civil Engineers
Abstract: A mathematical model, based on volume balance and Muskingum type storage‐discharge relation, is presented for design and evaluation of furrow irrigation systems. Three field data sets from Colorado farms are used to test ...
Enhancing Sedimentation Using Newly Proposed Virtual Bed Concept
Publisher: ASCE
Abstract: One of the greatest challenges faced when using gravity settling is achieving efficient particle removal and retention rates under high inflow rates. This paper proposes a new method for enhancing sedimentation and protecting ...
Using CFD Modeling to Improve the Inlet Hydraulics and Performance of a Storm-Water Clarifier
Publisher: American Society of Civil Engineers
Abstract: The feasibility of high-rate treatment of storm water achieving total suspended solids (TSS) removals in the range from 60 to 80% was studied using an available clarifier. The clarifier (
Case Study: Refinement of Hydraulic Operation of a Complex CSO Storage/Treatment Facility by Numerical and Physical Modeling
Publisher: American Society of Civil Engineers
Abstract: The performance of a combined sewer overflow (CSO) storage/treatment facility in North Toronto, Ont., Canada, was investigated by conjunctive numerical and physical (hydraulic) modeling. The main objectives of the study ...
Numerical Modeling Study of Hydraulic Impact of a Large Sediment Capping Facility
Publisher: American Society of Civil Engineers
Abstract: An engineered containment facility (ECF) that would cap and contain some of the most contaminated sediments in Hamilton Harbour has been proposed. Because of the size and shape of this structure, the ECF will alter local ...