High-Efficiency Bio-Cord (Braid Type) Media | Advanced Biomimetic Carrier for Contact Oxidation

Product Overview

When upgrading existing wastewater treatment plants or executing river ecological restoration, expanding the physical footprint is often impossible.

The Biomimetic Bio-Cord Media manufactured by HNS Watertech offers a high-performance alternative. Formed from specially processed synthetic chemical fibers, it is designed to be installed in a suspended, vertical “forest” or curtain structure within the reaction tank. As wastewater flows through this biomimetic array, it provides a massive, highly affinitive surface area for microorganisms to attach, naturally developing a robust biofilm that performs highly efficient contact oxidation.

The Working Principle: Single-Tank SND

The bio-cord acts as a sophisticated micro-reactor. Due to its radial braid structure, a natural oxygen gradient forms across the media:

Outer Layer (Aerobic): High dissolved oxygen (DO) levels support rapid carbon oxidation and nitrification.
Inner Core (Anaerobic/Anoxic): As oxygen penetration decreases toward the center, an anoxic/anaerobic state naturally occurs. This allows specialized microorganisms to consume nitrate nitrogen, achieving highly effective Simultaneous Nitrification and Denitrification (SND) within the exact same tank.

Key Engineering Advantages

70% – 80% Efficiency Boost: Due to its massive effective surface area and optimized mass transfer efficiency, our bio-cord improves overall biological purification performance by 70% to 80% compared to conventional rigid media.
“Water Grass” Biomimicry (Zero Clogging): Simulating the morphology of natural aquatic plants, the bio-cord is highly flexible. During aeration, the cord’s diameter dynamically flexes and sways. This constant motion easily shakes off dead, aged sludge, preventing accumulation and clogging while ensuring a long service life.
Versatile Customization: By altering the manufacturing methods and fiber compositions, we produce a complete range of media tailored for different wastewater concentrations, and specific reactor environments (aerobic, anaerobic, or facultative).
Rapid Installation: Manufactured as a ready-to-deploy curtain structure, allowing for fast, modular installation directly into existing tanks or natural riverways without complex civil works.

Technical Specifications

Parameter	Specification
Material	Specially Processed Synthetic Fibers
Structure Type	Braid / Curtain Structure
Standard Diameters	Φ 50 mm / Φ 60 mm / Φ 80 mm
Installation Spacing	80 mm – 200 mm (Adjustable)
Packaging Method	Standard Woven Bags
Core Functions	SND, High Mass Transfer, Sludge Reduction

💡 Frequently Asked Questions (Q&A)

Q1: How does the flexible “water grass” structure improve system maintenance?

A: Traditional fixed-bed media often traps dead sludge in its rigid corners, leading to clogging and reduced treatment capacity. Our bio-cord’s diameter is physically flexible under aeration. This continuous movement naturally sloughs off excessive, aged biofilm, maintaining a healthy, thin, and highly active biological layer with virtually zero manual maintenance.

Q2: Can we use this media for both aerobic and anaerobic zones?

A: Yes. The media itself is highly adaptable. Depending on your oxygen supply (aeration vs. mixing), the bio-cord will cultivate the required microbial communities. We can also adjust the fiber specifications to perfectly suit your specific aerobic, anaerobic, or facultative tank designs.

Q3: How is the media arranged in the reactor?

A: The bio-cords are typically installed in a vertical “curtain” or “forest” configuration. Depending on your influent concentration and aeration strength, we recommend an installation spacing of 80mm to 200mm. This ensures optimal fluid dynamics and prevents short-circuiting in the water flow.