Product Information
- Name : Combined Media | Double-Ring Media | Fiber Bundle Media
- SKU : BLT-332
- Category : aeration-equipment
Combined media usually consists of plastic rings paired with fiber bundles. The rings act as a frame, and the fiber bundles hang off them, so the whole thing looks like a string of discs covered in bristles. It's a type of suspended biofilm media, installed in biological tanks as a biofilm carrier. Biofilm attaches quickly, the specific surface area is large, and treatment performance is more stable than single-media alternatives. The dense fiber bundles hold more microorganisms, while the rings keep space open so water and air bubbles can pass through more easily.
Request a QuoteCombined Media | Double-Ring Media | Fiber Bundle Media
Working Principle
The media hangs on supports inside the tank, and wastewater flows upward through the media bed. Microorganisms attach to the fiber bundles and ring surfaces, gradually forming biofilm. Air bubbles rising from aeration get cut repeatedly by the rings, which improves oxygen transfer. Older biofilm sloughs off under the scouring of airflow and water flow, while new growth takes over, keeping activity high. The gaps between fiber bundles also trap some suspended solids, reducing the load on downstream treatment.
Application Fields
1.Chemical wastewater: biofilm carrier in contact oxidation tanks, breaking down organic matter.
2.Printing and dyeing wastewater: attached-growth media in the biological stage, working with aeration to remove color and COD.
3.Pharmaceutical wastewater: microbial attachment carrier in hydrolysis-acidification and aerobic tanks.
4.Food processing: biological treatment of high-strength organic wastewater, handling shock loads.
FAQ
Q1: What materials are combined media usually made of?
A: The rings are typically polypropylene or polyethylene, and the fiber bundles are often vinylon, polyester, or polypropylene. PP rings resist acids and bases and cost less. Vinylon fiber bundles are flexible and biofilm attaches quickly, but strength is only average. Polyester and PP offer better wear resistance and longer service life.
Q2: How is it different from elastic media?
A: Elastic media is made of individual strands spreading out radially, while combined media uses rings plus fiber bundles for a more three-dimensional structure. Combined media holds more biofilm and performs more consistently, but it's heavier, so the supports need to be stronger. Elastic media is lighter and easier to install, but it handles shock loads poorly—when influent suspended solids are high, the strands tend to tangle.
Q3: What should be watched during installation?
A: The media is usually threaded onto center ropes or supports at set spacing, with both ends secured so it doesn't come loose under flow. Don't pack it too densely, or flow will be restricted and sludge will build up. Aeration at the bottom needs to be even to avoid dead zones that cause uneven biofilm growth. During inspection, check the fiber bundles for breaks or tangling and deal with any issues promptly.