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Adsorption plus filtration
Combines particulate retention with carbon-based reduction of selected dissolved compounds.
Adsorptive media
Activated Carbon Filter Pads
Activated carbon-impregnated filter media for processes that may benefit from contained adsorption and particulate retention in a single supported pad.
Original product references
Product and system imagery
These first-party Sri Bharathi images are retained from the previous website. Grade tables are legacy published references; confirm current availability, tolerances and test methods with the quotation.
Operating principle
How the filtration product works
An activated carbon filter pad incorporates adsorptive carbon within a supported filter matrix. As a compatible liquid passes through the pad, suspended particles can be retained by the media while selected dissolved colour- or odour-causing compounds may adsorb onto available carbon surface.
This replaces two separate operations in some plate-and-frame or supported-pad processes: dosing loose powdered carbon into a tank and subsequently removing that powder on paper or cloth. Adsorption capacity is finite, so colour or odour breakthrough—not only differential pressure—can determine the endpoint.
Media design
Construction and process behaviour
Sri Bharathi publishes carbon-impregnated pads made with different activated-carbon grades to help optimise the filtration duty. The detailed carbon type, loading, binder or support chemistry, dimensions and extractables profile are grade-specific and should be requested before trial.
Because adsorption is molecule-specific, an activated carbon pad cannot be selected solely by particle-retention language. Contact time, concentration, temperature, pH, competing organics, flow and carbon accessibility all influence treatment performance.
What to evaluate
Important features and benefits
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Contained carbon format
Can reduce loose-carbon dosing and the downstream task of capturing carbon powder.
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Simplified handling
Pad form may reduce dust, tank clean-up and carbon scraping in compatible equipment.
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Grade choice
Different carbon grades are referenced for optimisation of specific liquids.
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Defined breakthrough
Colour, odour or analytical endpoint can be trended during a qualification run.
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Cut-to-fit media
Dimensions should match the filter support and seal geometry to prevent bypass.
Technical data
Specification and enquiry checklist
Values below are limited to information published by Sri Bharathi. Final grade, compatibility and operating limits must be confirmed against the actual process.
| Selection parameter | Available / verified information | Engineering relevance |
|---|---|---|
| Functional component | Activated carbon incorporated in a filter pad. | Provides finite adsorption sites for compatible target compounds. |
| Carbon grade / loading | Grade-specific; request declared information. | Drives adsorption behaviour, capacity and potential extractables. |
| Retention | Depends on the supporting media and process. | Do not assume adsorption performance equals a particulate micron rating. |
| Dimensions | Made for compatible supported-pad or plate-and-frame equipment. | Fit and sealing are essential to avoid untreated bypass. |
| Operating conditions | Fluid-, carbon- and support-specific. | Confirm pH, solvent, temperature and differential-pressure compatibility. |
| Endpoint | Breakthrough, pressure limit, batch volume or quality criterion. | Adsorption can exhaust even when the pad is not hydraulically blocked. |
Process fit
Applications and selection considerations
Activated carbon pads may be considered where colour, odour or trace organic reduction is needed alongside clarification in compatible chemical, beverage, food and process-liquid duties. Suitability depends on whether the target compound adsorbs effectively and whether the pad materials meet product-contact requirements.
Qualification approach
- Define the target compound or measurable colour/odour criterion.
- Record feed concentration, temperature, pH and flow per unit area.
- Sample across the run to establish a breakthrough curve.
- Measure any initial rinse requirement and product yield loss.
- Check for carbon fines, extractables and interaction with valuable product components.
Questions engineers ask
Frequently asked questions
Is an activated carbon pad equivalent to adding powdered activated carbon?
Not exactly. Carbon dose, accessible surface area, contact pattern and residence time differ. A side-by-side process trial is needed.
Can activated carbon remove every colour or odour?
No. Adsorption is selective and affected by molecular size, polarity, pH, temperature and competing substances.
When should an activated carbon pad be changed?
Use an agreed outlet-quality or breakthrough limit, together with pressure and throughput criteria. Pressure alone may not reveal exhausted adsorption capacity.
Does the activated carbon pad eliminate downstream filtration?
It can combine functions in some systems, but a polishing filter may still be required depending on fines control and final cleanliness.
Continue specifying
Related filtration products
Technical presentation
Filter Pad and Activated Carbon Pad Overview
The Filter Paper & Pad Deep Dive includes media construction, published pad grades and a dedicated activated carbon pad overview. The inline viewer opens directly on the activated carbon pad section.
Application support
Send us your operating conditions
Share your fluid, temperature, desired clarity, existing equipment and dimensions. Our team can then recommend a suitable construction and prepare a quotation.