Trickling Filter
Bio Block Media
LiTENDA Bio Block is a structured HDPE trickling filter media built as a three-dimensional hexagonal grid — engineered for maximum biofilm surface area, near-immunity to clogging, and decades of maintenance-free service in municipal and industrial wastewater towers.
What is a
Bio Block?
Bio Block is a structured filter media extruded from high-density polyethylene (HDPE) and welded into a three-dimensional grid. Its distinctive reticular tube structure gives bacteria in wastewater a specialized surface to colonize — and the intentionally rough texture further boosts biofilm adhesion.
LiTENDA Bio Block uses interconnected net tubes welded into square, stackable blocks, making it easy to maintain and almost immune to clogging — even at flow rates between 7,500 and 10,000 liters per hour per square meter of surface area.
The larger the specific surface area, the larger the bacterial population it can support, and the better the treatment outcome. Bio Block also performs as a contact filter for suspended solids: at lower hydraulic loads, particles bind into flocs against the structured surface, with treatment efficiency improving over time as a biofilm web forms between the net elements.
100% virgin HDPE — no PVC, no glue, no degradation. Built to last 20+ years.
Bio Block Advantages
Every structural detail is engineered to maximize biofilm growth while keeping operation simple, low-maintenance, and chemically resistant.
Bio Block In Action
Watch how the structured hexagonal grid channels water flow and supports biofilm development across the full block.
Four Block Types, One System
LiTENDA Bio Block ships in four structural variants, so you can mix and match coverage, surface area, and structural support to your tower design.
Bio Block Specifications
Standard sizing covers most trickling filter towers; fully customized dimensions are available on request.
| Parameter | Specification |
|---|---|
| Material | 100% Virgin HDPE — no PVC, no glue |
| Structure Type | Welded 3D hexagonal channel grid |
| Standard Size | 550 × 550 × 550 mm |
| Alternate Size | 280 × 280 × 490 mm, or fully customized |
| Hydraulic Load Capacity | 7,500 – 10,000 L/h per m² of surface area |
| UV Resistance | Yes — suitable for outdoor, uncovered installations |
| Chemical Resistance | High — biologically and chemically non-degradable |
| Self-Supporting | Yes — durable enough to walk on directly |
| Maintenance | Self-cleaning, does not clog |
| Service Life | 20+ years |
Stable Installation, Every Time
Bio Block sections are mounted using a simple L-support bracket system, available in large and small fittings to match different tower configurations.
Each block section locks into place using a large or small L-support bracket, keeping the structure stable and self-supporting once installed — no separate frame or scaffolding required inside the tower.
Benefits of Structured Trickling Media
Bio Block's structured design solves the two biggest problems with trickling filter media: clogging and limited biofilm surface area.
Bio Block Applications
A versatile media that performs across municipal, industrial, and aquaculture water treatment systems.
Need a custom Bio Block size?
Send us your tower dimensions and flow rate — our engineers will recommend block type, quantity, and layout, free of charge.