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Municipal Drinking Water Treatment
Water & Effluent Treatment

Municipal Drinking Water Treatment

Granular activated carbon polishing for municipal drinking water treatment plants targeting taste, odour, disinfection byproducts, dissolved organic carbon, and emerging contaminants.

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The Challenge
Drinking water utilities face tightening regulations on disinfection byproducts, taste and odour complaints from seasonal algal blooms, and emerging contaminant lists that include PFAS, pharmaceutical residue, and trace pesticide. Conventional clarification and filtration alone cannot meet these limits.
Quick Answer

Municipal drinking water treatment uses granular activated carbon (GAC) polishing downstream of conventional clarification and filtration to remove taste and odour compounds (geosmin, MIB), disinfection byproducts (THM, HAA), dissolved organic carbon, and emerging contaminants (PFAS, pharmaceutical residue). Empty bed contact time matched to the target.

Municipal Drinking Water Treatment

Drinking Water Standards Drive the Polishing Stage

Drinking water utilities serve regulated populations with regulated standards: chlorine residual, taste and odour compounds, disinfection byproducts (trihalomethanes, haloacetic acids), dissolved organic carbon, fluoride, arsenic, and the emerging contaminants list (PFAS, pharmaceutical residue, pesticides). Conventional clarification and filtration plants remove turbidity and particulate but cannot meet the dissolved contaminant limits. GAC polishing is the standard polishing stage that bridges the gap between conventional treatment and modern regulatory requirements.

EBCT Sizing for the Target Contaminant

The bed is sized by empty bed contact time (EBCT = bed volume / volumetric flow):

  • Dechlorination and chloramine reduction: EBCT 2 to 6 minutes
  • Taste and odour (geosmin, MIB from algal blooms): EBCT 8 to 15 minutes
  • Dissolved organic carbon and THM precursors: EBCT 15 to 25 minutes
  • PFAS short and medium chain: EBCT 10 to 20 minutes

Bed depth follows from the face velocity (8 to 15 m/h service) and the EBCT.

Municipal Drinking Water Treatment process equipment

GAC 1240 and NSF Eligibility

The reference grade is SorbiTech GAC 1240, manufactured to ISO 9001:2015 and eligible for NSF/ANSI 61 contact with drinking water. The wetted materials of construction (vessel, internals, valves) are NSF/ANSI 61 certified for the operator regulatory approval. The SorbiTech COA per lot supports the utility regulatory submission.

Reactivation Programme Cuts Lifecycle Cost

Spent GAC is thermally reactivated at 850 to 950 °C at the SorbiTech partner facility and returned to service at 85 to 95 percent of virgin activity. The reactivation contract lowers the lifecycle cost by 40 to 60 percent versus single use operation. Sector coverage is municipal water treatment.

Selection Guidance

GAC 1240 in a fixed bed contactor sized by empty bed contact time. EBCT 2-6 min for dechlorination, 8-15 min for taste & odour, 15-25 min for DOC and THM precursors. NSF/ANSI 61 eligible media and wetted materials.

How SorbiTech Solves It

A Specified, Verified Solution

Define the duty

We capture your process conditions: flow, composition, pressure, temperature, and the target outlet specification.

Select media & configuration

Our engineers recommend the adsorbent grade and system type that meet the duty with margin.

Size & engineer

Bed sizing, vessel design, and cycle parameters are engineered to your case and documented for approval.

Commission & verify

We support loading, start up, and performance verification against the guarantee.

Recommended Products & Systems

Media

Adsorbents & Media

  1. 01 Activated Carbon GAC 1240 Adsorbent Activated Carbon GAC 1240 Coal based granular activated carbon for dechlorination, taste and odour, and dissolved organics in water. Form 12 × 40 US mesh (0.42–1.70 mm)
  2. 02 Powdered Activated Carbon Adsorbent Powdered Activated Carbon Fine powder carbon for slurry dosing in water treatment, sugar decolorization, pharmaceutical purification, and emergency contamination response. Form 200×325 mesh (45–75 µm)
  3. 03 SorbiTech Activated Alumina Aa 201 Fluoride Removal Defluoridation Adsorbent Activated Alumina AA-201 Smooth sphere activated alumina for compressed air and gas drying, fluoride removal, and guard bed duty. Water Cap. ≥ 18 %
Equipment

Engineered Systems

  1. 01 SorbiTech Activated Carbon Water Contactor Drinking Water GAC Polishing Contactor Equipment Activated Carbon Water Contactor Granular activated carbon fixed bed water contactor for dechlorination, taste and odour, dissolved organic carbon, and emerging contaminant polishing in drinking water and process… Capacity 5–2,000 m³/h
  2. 02 SorbiTech Community Defluoridation Treatment Unit Activated Alumina Fluoride Removal Skid Equipment Community Defluoridation Treatment Unit Containerised activated alumina defluoridation unit for community and decentralised drinking water supply to the WHO guideline of 1.5 mg per litre. Capacity 0.5–50 m³/h
  3. 03 SorbiTech Multi Media Filter Water Treatment Pressure Vessel Mmf Equipment Multi Media Filter Multi media filter for suspended solids and turbidity removal upstream of activated carbon polishing, reverse osmosis, or process reuse in water treatment trains. Capacity 5–500 m³/h
  4. 04 SorbiTech Coalescing Filtration Skid Oil Water Coalescer Filter Package Equipment Coalescing Filtration Skid Two stage coalescer and separator skid that removes fine dispersed hydrocarbons and solids from water down to single digit ppm. It is the polishing… Capacity 2–200 m³/h
Industries

Industries Using This Application

  1. 01 SorbiTech Municipal Water Treatment WWTP Clarifiers GAC Contactor Hall Sector Municipal Water Treatment Activated carbon and activated alumina for taste and odour, dechlorination, and fluoride removal in drinking water treatment. NSF eligible media and complete treatment units.

Specify a Solution for This Application

Provide your process conditions and our team will recommend the grade, configuration, and sizing.

contact@sorbitech.com