Hybrid Slow Sand Filtration for Emerging Applications in Water Treatment
Makhabbat Kunarbekova1, Ulan Zhantikeyev1, Kainaubek Toshtay2
1Laboratory of Engineering Profile, Satbayev University, 22 Satbayev Str, Almaty 050013, Kazakhstan.
ACS Omega
|July 24, 2026
Summary
Slow sand filtration (SSF) is advancing water treatment by integrating new materials and methods to remove diverse contaminants. Further research is needed for nutrient removal, long-term performance, and standardization for widespread use.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
- Filtration Systems
Background:
- Slow sand filtration (SSF) traditionally relies on biophysical processes.
- Recent studies highlight key gaps in SSF's application and understanding.
- There is a need to enhance SSF for broader contaminant removal and efficiency.
Purpose of the Study:
- To review recent advancements in slow sand filtration (SSF) for water treatment.
- To identify and address knowledge gaps in SSF research.
- To highlight SSF's potential as a versatile water treatment platform.
Main Methods:
- Review of recent studies on slow sand filtration (SSF).
- Analysis of integrated hybrid systems and advanced materials in SSF.
- Examination of molecular biology tools, flux modeling, and system analysis for SSF.
Main Results:
- Integration of materials like zerovalent iron and graphene oxide enhances removal of turbidity, pathogens, heavy metals, and emerging contaminants.
- Advanced molecular tools and modeling improve understanding of SSF mechanisms.
- SSF shows versatility across rural, urban, and industrial settings, but faces operational challenges.
Conclusions:
- SSF is evolving into a flexible, multifunctional water treatment platform.
- Knowledge gaps persist in nutrient removal, long-term performance, and standardization.
- Future research should focus on field validation, economic assessment, and optimization for sustainable implementation.
Related Concept Videos
00:53Filtration
Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.