Elastic
Packing

Elastic (three-dimensional) packing is a hanging biofilm carrier. Elastic plastic filaments with corrugations and micro-burrs are fixed along a central rope and radiate in a spiral, three-dimensional arrangement, so they spread evenly through the water. The semi-rigid strands cut rising air bubbles repeatedly — raising oxygen transfer and aeration efficiency — while the slight vibration from the air and water flow creates turbulence that brings organics, oxygen and microorganisms together. Long service life, good aeration performance, low power consumption, fast biofilm start-up, easy shedding, high shock-load resistance, no clogging or balling and low cost.

Request a Quote Technical Details

Φ150 / 180 / 200 mmModule diameter

PPMaterial

Filaments on a ropeStructure

On requestStrand spec

Elastic packing module with elastic filaments on a central rope

Carrier type

Hanging elastic carrier

Module diameter

Φ150 / 180 / 200 mm

Material

PP (polypropylene)

Filament diameter

On request

Filament spacing

On request

Price

On request

Why this media

Filaments that work
the whole tank volume

A soft-packing bundle collapses into a knot and leaves the water around it doing nothing. Elastic packing holds its shape, so the surface you pay for is the surface the biofilm actually uses.

Strands stay apart, not knotted

The filaments are anchored along the rope and spring outward on their own. They do not tangle into a dense core, so there is no dead zone in the middle of the module.

Biofilm across the full module

Water and air are redistributed as they pass each module, which keeps the biofilm in contact with the substrate and discourages the thick, anaerobic layer that sheds in patches.

Simple to hang and to service

Modules are strung on a centre rope and hung in rows from an upper frame. No complex support structure is needed, and a single module can be lifted out for inspection.

Specifications

Technical parameters

Parameter	Value
Type	Elastic three-dimensional packing (YDT type) · elastic wave-form packing (TA type)
Module (unit) diameter	Φ80 / Φ100 / Φ120 / Φ150 mm (the YDT reference table also lists 50 / 80 / 100 / 120 / 173 / 180 / 200 / 220 mm)
Filament diameter	0.2 / 0.35 / 0.5 mm
Filament density	High density · medium density · medium-low density · low density
Specific surface area	250 – 300 m²/m³ (YDT reference range 50 – 300 m²/m³)
Porosity	> 99%
Biofilm mass (after film growth)	50 – 100 kg/m³ (YDT reference range 50 – 110 kg/m³)
Structure	Elastic filaments with corrugations and micro-burrs, fixed along a central rope in a spiral, radial three-dimensional arrangement
Material	Polyolefin / polyamide grades selected for corrosion, temperature and ageing resistance
Service	Aerobic · anoxic · anaerobic
Wastewater COD_Cr range	Aerobic 100 – 2,000 · anoxic 1,000 – 10,000 · anaerobic 5,000 – 30,000 (reference values)
MOQ / price	On request — confirm module diameter, quantity & destination

Selection & quotation	What we need from you
Typical use	Biological contact oxidation tanks; aerobic, anoxic and anaerobic zones
Tank volume	On request — send the tank volume and the fill ratio you plan to use
Installation	Modules strung on a centre rope and hung in rows from an upper support frame
Quotation data	Flow rate, influent and target effluent quality, tank dimensions, and destination port
Export packing	On request — packed for the transport mode and destination you nominate

Figures that are not confirmed for your duty are marked On request rather than estimated. Dimensional and performance values for the packing we supply are issued in writing with the quotation.