ZONE KDF85 Filter Media
Update time: 25-05-10 Views: 24
In industrial and civil water treatment, excessive iron ions and hydrogen sulfide odor are two major challenges affecting water quality. Iron contamination not only turns water yellow and stains appliances but also accelerates pipeline corrosion. Hydrogen sulfide, on the other hand, emits a pungent "rotten egg" smell, severely compromising the water usage experience. To address these pain points, ZONE introduces KDF85 filter media, a globally recognized solution leveraging unique electrochemical redox technology.
I. Core Technology: The Redox Revolution of Copper-Zinc Alloy
KDF85 is composed of 85% high-purity copper and 15% zinc, a golden ratio that delivers exceptional water treatment performance. As water flows through the media, the copper-zinc alloy creates a galvanic cell effect: the higher-potential copper acts as the cathode, while the lower-potential zinc serves as the anode, initiating a redox reaction (REDOX). In this process, zinc atoms release electrons to become zinc ions, while iron ions (Fe²⁺) and hydrogen sulfide (H₂S) in the water are oxidized/reduced into insoluble substances through electron transfer.
Key reaction mechanisms include:
1. Iron Ion Removal:
Fe²⁺ is oxidized to Fe³⁺, forming Fe(OH)₃ precipitates that attach to the media surface and can be easily removed via backwashing.
2. Hydrogen Sulfide Decomposition:
H₂S reacts with copper to form copper sulfide (CuS), a black precipitate cleared through physical filtration.
3. Heavy Metal Adsorption:
Heavy metal ions like lead and mercury are trapped via ion exchange and surface adsorption, achieving simultaneous purification.
II. Performance Advantages: A Breakthrough Beyond Traditional Filter Media
1. High-Efficiency Purification:
KDF85 removes over 98% of iron and over 95% of hydrogen sulfide, far surpassing traditional media like manganese sand. It operates effectively in a pH range of 6.5–9.5, ideal for treating high-hardness groundwater.
2. Long-Lasting Durability:
With uniform particle size (0.149–2.00mm) and high compressive strength, the media lasts 5–8 years under normal use, requiring only regular backwashing to restore performance. When combined with activated carbon, it extends the latter’s lifespan by over 30%.
3. Antibacterial & Antiscalant Properties:
Zinc ion release inhibits bacterial and algal growth while altering scale crystal morphology, transforming hard scales into soft, removable deposits. It is certified by the US EPA as a "microbial inhibition device."
4. Eco-Friendly & Safe:
Free of chemical additives, backwash wastewater can be discharged directly. The media meets NSF/ANSI 42 standards for drinking water treatment, ensuring safety and compliance.
III. Applications: Tailored Solutions for Diverse Scenarios
1. Industrial Water Treatment:
- Groundwater Pretreatment: Removes iron and H₂S from well water to protect RO membranes from contamination.
- Cooling Tower Circulation: Prevents iron oxide deposition and extends equipment lifespan.
- Plating Wastewater Treatment: Efficiently adsorbs heavy metals to reduce discharge concentrations.
2. Civil & Commercial Use:
- Home Water Purification: Solves yellowing and odorous tap water issues, enhancing drinking water taste.
- Hotels & Catering: Ensures clean kitchen water, preventing pipeline blockages and equipment damage.
- Swimming Pool Treatment: Inhibits algae growth, reduces chlorine usage, and lowers maintenance costs.
IV. Usage Guidelines: Optimize Performance Through Scientific Configuration
1. System Design:
Pair with activated carbon, quartz sand, or other media to form a three-stage filtration system (pretreatment-fine filtration-adsorption). For example, use KDF85 as a pre-filter to remove iron/H₂S, followed by activated carbon for chlorine and organic matter removal.
2. Parameter Settings:
- Filtration Rate: Maintain 10–20m/h for sufficient reaction time.
- Backwashing: Conduct 1–2 times weekly at twice the normal flow rate for 10 minutes.
- Media Height: Recommend 1.0–1.5m bed depth based on water volume.
3. Maintenance Tips:
Regularly test inlet/outlet water quality. When iron exceeds 0.3mg/L or H₂S >0.05mg/L, intensify backwashing or replace media. Before long-term shutdown, perform acid cleaning (pH 2.5–3.0) to remove metal oxide deposits.
KDF85 redefines water treatment standards with its unique electrochemical principles, high efficiency, and versatility. Choosing KDF85 means choosing a safe, durable, and eco-friendly water solution. ZONE is committed to collaborating with you to create clean water sources and protect life and health.
