Abstract
Non-point source (NPS) pollution is one of the primary sources of contamination in aquatic systems, such as rivers and lakes. Various techniques and devices, including low impact development (LID) and best management practice (BMP) devices, can reduce NPS pollution. These devices are installed with pretreatment units to remove NPS pollutants more efficiently and to facilitate maintenance. In this study, suspended solids (SS) and particle size distributions (PSD) were investigated in a pilot-scale facility to determine the effect of various pretreatment unit types and inflows on SS removal. We found that the efficiency of SS concentration and particulate matter removal changed significantly (p < 0.05) based on the aspect ratio of the pretreatment unit. Three flow conditions were also tested (10, 15, and 20 m3/h); SS removal was most efficient at 15 m3/h. These findings can be applied to the design of NPS management facilities, which is expected to help increase the efficiency of new NPS facilities while reducing operating costs.
Highlights
Non-point source (NPS) pollution is a primary source of pollution affecting water quality [1,2,3].The discharge characteristics of sediment-related pollutants, which include nutrients, heavy metals, pathogens, and suspended solids (SS), vary according to the land use; roads, industrial areas, and paddy fields create different types of sediment-related pollutants
SS removal efficiency was higher with the aspect ratio of 1:4 than 1:1 for all three inflow rates
At an inflow rate of 10 m3 /h, SS removal efficiency differed significantly for the two aspect ratios at pretreatment unit1 (PTU 1) (p < 0.05); there was no difference at PTU 2 (p > 0.05) for the two aspect ratios
Summary
Non-point source (NPS) pollution is a primary source of pollution affecting water quality [1,2,3].The discharge characteristics of sediment-related pollutants, which include nutrients, heavy metals, pathogens, and suspended solids (SS), vary according to the land use; roads, industrial areas, and paddy fields create different types of sediment-related pollutants. NPS pollution in urban areas is characterized by a high initial concentration and a rapid decrease in concentration; these characteristics are important for water-quality management. To mitigate these first-flush NPS discharges, many technologies and techniques, including stormwater best management practice (BMP) devices, sustainable urban drainage systems (SUDS), low-impact development (LID), and green infrastructures (GI), have been installed on various surfaces in urban areas [6,7]. Several factors affect the performance of stormwater treatment technologies and techniques: 1) runoff characteristics, such as particle size distribution and the concentrations of pollutants; 2) hydraulic loading rate (HLR); 3) runoff volume; and 4) treatment type, such as hydrodynamic, filtration, and bio-media mix [8,9,10]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
