Hel-X 13KLL+ Biofilm Carrier | MBBR & RAS Media | BTA
Hel-X 13KLL+ Biofilm Carrier | MBBR & RAS Media | BTA
HEL-X 13KLL+
Premium HDPE moving-bed media for MBBR, RAS and IFAS systems. German-engineered by Christian Stöhr GmbH & Co. KG. 806 m²/m³ protected surface area in a compact, energy-efficient 13 mm carrier.
Protected Surface. Better Biology.
Most carriers quote a bulk surface area that includes exposed, high-shear exterior surfaces. Hel-X focuses on the surface that actually matters: protected, sheltered area where mature biofilm can thrive.
806 m²/m³ Protected Surface Area
Bulk numbers can be misleading. The Hel-X 13KLL+ delivers 806 m²/m³ of protected surface area — the sheltered internal surface where stable, high-activity biofilm develops without being scoured away by media collisions or aeration.
With a bulk surface area of 955 m²/m³ and a compact 13 mm × 12 mm form factor, the Type 7F+ geometry maximises usable surface while maintaining the free flow and low hydraulic resistance that keep oxygen and nutrients evenly distributed through the bed.
Type 7F+ Geometry
Cross-shaped body with low intermediate lamellas creates optimal gaps for water flow, diffuses shear forces, and prevents media from clumping or fouling.
HDPE Virgin or Recycled
Choose white virgin HDPE or black recycled HDPE. Both share the same 13 mm × 12 mm dimensions and surface-area specifications.
Energy-Efficient Fluidisation
Low-density polyethylene and hydrodynamically tuned lamellas reduce the mixing energy required to keep the bed moving — lower aeration cost, longer blower life.
Biofilm Protection
The sheltered internal structure protects biomass from abrasion, keeping active nitrifiers and heterotrophs on the carrier instead of washing out into the effluent.
German Stöhr Manufacturing
Christian Stöhr GmbH & Co. KG brings over 50 years of plastics engineering and strict quality control to every batch of carrier media.
Flexible Scalability
Drop into new reactor designs or retrofit existing tanks. The same media works in MBBR, IFAS, fluidised beds, RAS and gas-scrubbing applications.
Built For MBBR & RAS
Hel-X 13KLL+ suits aquaculture recirculation, wastewater MBBR/IFAS, biogas treatment and gas scrubbing. Critical dimensions and material data below.
Material
High-Density Polyethylene (HDPE). Available in recycled black or virgin white.
Dimensions
13 mm diameter × 12 mm length. Compact form factor for high fill fractions without bridging.
Protected Surface
806 m²/m³ of internal sheltered surface for stable biofilm growth.
Bulk Surface
955 m²/m³ total including exterior contact surfaces.
Design
Type 7F+ cross with low intermediate lamellas for optimal flow and mixing.
Applications
MBBR, IFAS, fluidised beds, RAS aquaculture, biogas treatment and gas scrubbing.
Four Steps To A Better Biofilter
Calculate Volume
Size your reactor fill fraction. Typical MBBR fill is 30–70%; RAS biofilters usually run 20–40%. Multiply reactor volume by fill fraction to get media litres.
Aerate & Mix
Use coarse-bubble aeration or mechanical mixing to keep Hel-X in continuous motion. The low-density HDPE and 7F+ shape keep energy demand modest.
Seed The Biofilter
Allow natural colonisation, or jump-start nitrification with Nitroplex or a compatible beneficial-microbe consortium.
Monitor & Maintain
Watch pressure drop, biofilm thickness and mixing quality. Occasional air-scouring or backwashing shears excess biomass and restores flow.
Sizing & Fill Rates
Typical fill fractions and recommended use cases for Hel-X 13KLL+.
| Application | Typical Fill | Surface Benefit | Notes |
|---|---|---|---|
| MBBR Wastewater | 30–70% reactor volume | 806 m²/m³ protected | Primary/secondary treatment; BOD & ammonia removal |
| RAS Aquaculture | 20–40% biofilter volume | High nitrification surface | Pair with reliable aeration & solids removal |
| IFAS Upgrade | 10–30% mixed with biomass | Extra attached biofilm | Retrofit existing activated-sludge tanks |
| Biogas / Gas Scrubbing | Design-specific | Chemical/biological scrubbing | Contact BTA for reactor sizing |
Helpsheet: 1000 L reactor at 50% fill = 500 L media ≈ 403 m² effective protected surface. Sold by litre or cubic metre — contact us for bulk quoting.
Frequently Asked Questions
Not sure how much media your reactor needs? Our team can size your MBBR or RAS biofilter, recommend fill fraction and map aeration layout.
Trade & Wholesale
Running a hatchery, aquaculture farm, water-treatment plant or OEM build? We offer competitive trade pricing on Hel-X 13KLL+, bulk-volume orders, system-design support and MBBR sizing guidance.
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