We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Effects of Filtration Velocity of Sand Filter Beds on Microparticulate and Natural Organic Matter Removal from River Water
Summary
Researchers conducted batch and continuous filtration experiments to evaluate the performance of sand filter beds at filtration velocities between 1.5 and 3.0 m/h for removing microparticulates including microplastics and natural organic matter from river water. They found that sand filters achieved greater than 70% removal efficiency for microparticulates and turbidity but less than 5% removal for natural organic matter including total organic carbon, 2-methylisoborneol, and geosmin.
River water often contains micropollutants such as microparticulates (including colloids and microplastics, MPs) and natural organic matter (NOM). Current decentralized water treatment systems, typically consisting of coagulation-sedimentation and rapid sand filtration with or without granular activated carbon, are generally inefficient in removing MPs and NOM. To evaluate the performance of sand filter (SF) beds in removing these micropollutants, batch and continuous experiments were conducted to investigate the effects of filtration velocity. SF beds operated at filtration velocities between 1.5 and 3.0 m/h achieved high removal efficiency (> 70%) for microparticulates (turbidity and MPs) but showed low efficiency (< 5 %) for NOM (total organic carbon, 2-methylisoborneol, and geosmin). However, headloss increased with filtration velocity due to pore clogging by microparticulates. When the filtration velocity increased from 1.5 to 3.0 m/h, the headloss at 3.0 m/h was approximately twice that at 1.5 m/h. These results indicate that SF beds should be operated at lower filtration velocities to prolong filtration time and enhance the removal efficiency for microparticulates and NOM.
Sign in to start a discussion.
More Papers Like This
The Effect of Filter Media Size and Loading Rate to Filter Performance of Removing Microplastics using Rapid Sand Filter
This study evaluated how filter media size and hydraulic loading rate affect rapid sand filter performance in removing microplastics from water. Smaller sand media (0.39 mm) and lower loading rates achieved greater MP removal, suggesting that optimizing these parameters can improve conventional water treatment for plastic particles.
Rapid Sand Filtration Technique for Remediation of Microplastics
Researchers tested rapid sand filtration as a technique for removing microplastics from water, evaluating particle removal efficiency across different plastic sizes, shapes, and filter media. The technique achieved meaningful microplastic reduction and was proposed as a practical water treatment enhancement.
Performance of rapid sand filter – single media to remove microplastics
This study evaluated the performance of a rapid sand filter as a single-media drinking water treatment step for microplastic removal, finding moderate removal efficiency that varied with particle size and filter operation parameters.
How effective is the retention of microplastics in horizontal flow sand filters treating stormwater?
Researchers tested the removal efficiency of lab-scale horizontal flow sand filters of three lengths (25, 50, and 100 cm) for four types of microplastics commonly found in stormwater, finding that more than 98% of microplastics were retained in all filters regardless of particle shape, size, or density. Sand filtration is highly effective for removing microplastics from stormwater runoff before it reaches freshwater recipients.
Effects of Permeate Flux in Adsorption/Coagulation-Membrane Filtration System for Removing Turbid Matter and Humic Acid from River Water
Researchers investigated the effects of varying permeate flux in an adsorption/coagulation-membrane filtration system designed to remove turbid matter, humic acid, and microplastics from river water intended for drinking. They found that permeate flux significantly influenced membrane fouling rates and removal efficiency of natural organic matter and colloidal particles, informing operational optimization of this combined treatment approach.