Product Overview
PSD-Ag+ is produced using our premium coconut shell activated carbon, modified via a precisely controlled silver loading process. The outcome is a dual-function filter media that does not merely trap contaminants, but actively inhibits bacterial growth on the carbon surface. This resolves the "biofilm rebound" issue commonly encountered with standard activated carbon filters.
The silver ions are chemically chelated onto the carbon surface and within the pore structure, creating a sustained-release antimicrobial effect. This isn't a surface coating that washes away; it's an integral part of the carbon matrix that maintains effectiveness throughout the filter's service life.
Key Application Areas
- Household drinking water purification — the go-to media for POU filters and whole-house POE systems, where silver impregnated activated carbon keeps filter beds free of bacterial growth between cartridge changes
- Municipal tap water treatment — an antibacterial carbon layer that guards against microbial regrowth in distribution networks and secondary disinfection stages
- Beverage and brewing water, where ingredient water must stay biologically stable without carrying off-tastes into the final product
- Food processing water treatment, from washing lines to ingredient prep, controlling microbial contamination at every water contact point
- Semiconductor ultrapure water (UPW) systems — biological contamination control where even trace biofilm can compromise wafer yield
- Medical and pharmaceutical water systems — bacteriostatic protection for purified water loops feeding production and laboratory use
Specifications
| Technical Specifications | PSD-Ag+ | Unit |
| Lodine value | > 1,100 | mg/g |
| Moisture content | < 10 | % -wt |
| Ash | < 3 | %-wt |
| Packing density | 430 ~ 530 | kg/m³ |
| PH | 5 ~ 8 | - |
| Lntensity | > 95 | % |
| Specific surface area | > 1,000 | m²/g |
| Particle size> 12 mesh (1.70 mm) | < 10 | %-wt |
| Particle size < 40 mesh (0.43 mm) | < 5 | %-wt |
| Silver carrying capacity | 0.2-4 | % |
Packaging
- The 20 kg / Package
- The 500 kg / Package
How It Works
- Adsorption Phase: Contaminants are physically trapped in the carbon's extensive pore network, just like standard activated carbon
- Antimicrobial Phase: Silver ions disrupt microbial cell membranes and interfere with DNA replication, preventing colonization on the carbon bed
- Sustained Release: The chelation process ensures controlled silver release—not a burst that depletes quickly, but a steady antimicrobial barrier
How PSD-Ag+ Enables Silver Loaded Coconut Shell Carbon Antibacterial Performance
Standard activated carbon filters in POU drinking water and semiconductor UPW systems perform well against organics and chlorine but create an ideal environment for bacterial colonization. Nutrients adsorbed on the carbon surface feed biofilm growth, which eventually sloughs off and contaminates downstream water—defeating the purpose of filtration.
Chelated silver loading fundamentally changes this dynamic. The silver ions are chemically bound to the carbon surface and within the pore structure, not merely coated. This creates a sustained-release antimicrobial effect that disrupts bacterial cell membranes and DNA replication across the filter service life. The >1100 mg/g iodine foundation ensures organic removal and dechlorination performance comparable to premium non-silver grades, while the chelation process prevents the burst release or rapid depletion common with surface coatings. In municipal tap water distribution systems, the biostatic effect prevents regrowth in distribution networks. In food & beverage processing, it maintains microbial control without chemical dosing.
PSD-Ag+ vs Standard Coconut Shell and Chemical Disinfection
Standard coconut shell carbons such as PSD-A0 or LC-A0 deliver excellent adsorption capacity for POE water treatment and ultra-pure water but offer no defense against bacterial colonization. Facilities must add secondary disinfection—UV, ozone, or chloramine—which introduces additional capital cost, energy consumption, and potential disinfection byproducts. Chemical dosing in pharmaceutical manufacturing water systems may conflict with regulatory purity requirements.
PSD-Ag+ offers a built-in biological barrier as silver loaded coconut shell carbon antibacterial media. The dual adsorption-plus-antimicrobial action eliminates the need for separate disinfection equipment in many residential and light commercial settings. Compared to standard premium coconut shell, the silver occupies minimal surface area and maintains >1100 mg/g iodine. For household drinking water filters and municipal tap water systems where bacterial regrowth is a documented risk, PSD-Ag+ extends functional service life by 20–30% through biofouling prevention. Choose standard PSD-A0 for pure adsorption duty; select chemical disinfection for high-bio-load industrial systems; choose silver loaded coconut shell carbon antibacterial PSD-Ag+ when dual contaminant removal and microbial control are required in a single media.