Import Biofilter Biological Filter — Buy in wholesale FOB from Supplier in China

The Guangzhou Ausfish biofilter biological filter is a box-type vessel engineered for nitrification and carbon dioxide degassing in recirculating aquaculture systems. It handles water flows from 40 m3/hr up to 360 m3/hr, with specific media surface areas reaching 2000 m2/m3 depending on substrate selection. The unit operates by passing pre-treated water through a packed bed of biofilm-supporting media at controlled velocity, maintaining hydraulic conditions that promote bacterial colonisation while preventing shear detachment of the nitrifying biofilm. Available media include coral sand, ceramic rings, bio balls, and bio cord, each selected to match the ammonia loading rate and target hydraulic retention time of the installation.

Nitrification performance depends on specific surface area, oxygen transfer, and media void fraction. Coral sand offers natural buffering but lower surface area; ceramic rings and bio balls provide intermediate surface area with predictable hydraulic behaviour; bio cord achieves the highest specific surface area and is preferred for high-density systems where ammonia flux exceeds 1 kg NH3-N per m3 media per day. The box-type shell is constructed from UV-stabilised polymer or fibreglass-reinforced plastic typical for Chinese aquaculture equipment, with internal baffles to distribute flow uniformly across the media bed. CO2 stripping occurs concurrently as water cascades through the void spaces, driven by forced air or natural ventilation depending on the design variant.

These biofilters serve land-based marine and freshwater recirculating aquaculture operations, hatcheries, and live-holding systems where ammonia toxicity limits stocking density. Buyers should specify target hydraulic loading, feed rate to derive ammonia production, and desired effluent ammonia-nitrogen concentration when requesting sizing assistance. The supplier indicates custom dimensions are available, so standard models may be modified for containerised or greenhouse-integrated installations. Confirm whether the quoted flow range refers to total system volume turnover or filter-specific throughput, as this affects the number of units required for a given farm capacity.

Guangzhou Ausfish Co., Ltd operates from 2F, Building E, Yishida Tech Park, No.2 Xingye Road, Jiuwangmiao, Nansha, Guangzhou 510000, China. The supplier carries a harbor trust tier with zero recorded response rate and no average response time data, signalling that proactive follow-up by buyers may be necessary. The company focuses on aquaculture water treatment equipment and markets this biofilter as a core component of recirculating systems, drawing on production experience in the Pearl River Delta region.

The profile does not state year of establishment, factory certification, annual turnover, staff count, export markets, or installed base. No ISO 9001, aquaculture equipment-specific approvals, or third-party test reports are mentioned. Buyers should request company registration documents, factory audit access, and case studies of operating installations in climates comparable to their own. The Nansha location offers proximity to Guangzhou port, but inland transport to Nansha New Port or Huangpu Port should be clarified in any quotation.