Combined Packing For Aerobic Tank: Biofilm Carrier For Wastewater Biochemical Treatment

Combined packing is a widely adopted suspended bio-carrier specially designed for aerobic tanks and biological contact oxidation processes. It combines rigid plastic support rings and soft hydrophilic fiber strands, forming a three-dimensional structure for microbial attachment and biofilm growth. Made of high-quality PP and synthetic fiber, this packing features corrosion resistance, anti-aging performance and stable structure for long-term operation in biochemical wastewater systems.

The unique mixed structure brings outstanding water and air distribution performance. When aeration bubbles rise through the packing layers, fiber filaments cut large bubbles into tiny ones, extending gas-water contact time and boosting oxygen utilization efficiency. It offers a large available specific surface area for fast biofilm formation. Nitrifying bacteria and heterotrophic microbes steadily colonize on the fiber surface, effectively degrading COD, BOD and ammonia nitrogen. The staggered flexible structure avoids sludge accumulation and clogging issues that trouble many traditional packing types.

Simple hanging installation is one major advantage. The packing can be mounted on supporting frames inside aerobic tanks quickly, without complicated modification to existing tanks. It adapts well to fluctuating water quality and shock loads, producing less surplus sludge compared with activated sludge processes. Standard sizes such as Φ150 mm, Φ160 mm and Φ180 mm are available; customized specifications can be supplied to match different tank dimensions and design loads.

This bio packing fits multiple wastewater treatment scenarios. It is the core medium for A/O, A²/O and contact oxidation systems for municipal domestic sewage. It works reliably for food processing, potato starch, meat slaughtering, papermaking, pharmaceutical and aquaculture wastewater projects. Many retrofitting projects upgrade old aerobic tanks with combined packing to raise nitrification capacity and improve effluent quality without expanding tank volume. It is also used in river ecological restoration and water reuse pretreatment.

Our combined packing undergoes strict raw material inspection before delivery. It maintains stable performance under long-term aeration and alternate biofilm shedding cycles. It is a cost-effective option for engineering contractors, plant owners and water treatment system integrators.

If you are upgrading aerobic biochemical sections or building new wastewater lines, contact us for packing layout suggestions, loading ratio guidance and bulk pricing.