Aquaculture Aeration Disk Micro Porous Ceramic Oxygen Diffufer for Fish Farm Pond

                                                                                                Product Details                                                                                       

1.Overview of Porous Alumina Aerator Plate & Tube for Aquaculture

1.1 General introduction
Porous alumina aerator plate/tube is a special microporous ceramic hollow/plate component designed for aquaculture oxygenation. It adopts high-purity alumina raw material and high-temperature sintered interconnected microporous structure. It can split compressed air into uniform microbubbles to maximize gas-liquid contact area, greatly improve water dissolved oxygen efficiency and cut energy consumption of air compressors. It is widely used in intensive fish & shrimp breeding, seafood temporary rearing, aquaculture sewage aerobic treatment and landscape pond oxygen replenishment, acting as a durable high-efficiency alternative to short-lifespan plastic & rubber aeration pipes.

1.2 Chemical Composition & Microstructure

• Single-phase high-purity alumina as main raw material, matched with controllable pore-forming agents and tiny sintering aids to form compact ceramic skeleton and interconnected breathable channels.
  
• Fully dense three-dimensional penetrating pore network, stable fixed micropore size without collapse or deformation after long-term underwater soaking.
  
• Density: 2.5–2.6 g/cm³, rigid solid ceramic base with balanced mechanical strength and stable air permeability.
  

2. Manufacturing Process

2.1 Raw Material Batching & Mixing
High-purity alumina powder is blended with quantitative pore-forming agents and sintering additives, uniformly ball-milled to eliminate particle agglomeration, precisely proportioned to guarantee stable porosity and consistent air output.
Step A: Extrusion / dry pressing to shape flat aerator plates and tubular aerator blanks separately.
Step B: Low-temperature debinding to fully burn out internal pore-forming substances and form connected through micropores.
Step C: High-temperature integrated sintering to solidify alumina skeleton and lock stable pore structure.
Step D: Strict constant temperature cooling curve to avoid deformation and internal microcracks inside aerator bodies.

2.2 Precision Cutting & Controlled Finishing
Step A: Molded aerator blanks are cut into standard sizes according to aquaculture equipment specifications.
Step B: Slow programmed edge chamfering to eliminate sharp burrs that may fall off and block air pipelines.
Step C: Cooled semi-finished aerators maintain complete flat/tubular shape without distortion before post-processing.
Secondary annealing treatment to release residual forming stress, improve aerator body toughness and prevent cracking under alternating water pressure.

2.3 Blank Sorting & Finished Stock
Saw large sintered aerator blanks into standard finished plates and tubes; grind inner and outer surfaces to unified dimensional standards. Conduct air permeability inspection to reject defective blanks with blocked pores. These qualified semi-finished aerators are supplied raw material to aquaculture equipment manufacturers.

3. Core Performance Profile (Defining Feature)

3.1 Dedicated Microporous Aeration Performance

• Stable open porosity rate at 30–35%, total porosity 35–36%, balanced air flux without excessive pressure loss during continuous aeration.
  
• Fixed uniform pore size of 1–3 μm, divides air into fine slow-rising microbubbles, effectively boosting dissolved oxygen rate and lowering power consumption.
  
• Water absorption rate 20–23%, moderate water permeation to prevent reverse water backflow into air pipelines under standard working pressure.
  

3.2 Excellent Water & Chemical Corrosion Resistance

• Ultra-stable chemical inertness against wide range of aquaculture disinfectants, bait residues, weak acid and weak alkaline breeding water. No toxic heavy metal ion precipitation to harm aquatic products.
  
• Anti-biofouling surface hard to attach algae and sludge, easy to backwash and recover original aeration efficiency.
  
• Stable performance sustained under long-term water immersion, while polymer plastic aerators will age and crack rapidly in muddy breeding water.
  

3.3 Chemical & Water Environment Compatibility

• Resistant to most aquaculture reagents, organic residues and general water pollutants; only slightly affected by concentrated hydrofluoric acid and strong molten alkali.
  
• Zero gas precipitation under long-term water soaking, fully compatible with closed circulating aquaculture water systems and seafood temporary rearing tanks.
  
• No harmful substance release after long-time underwater operation, safe for fry, shrimp, crab and edible aquatic products.
  

3.4 Mechanical & Safety Performance

• High compressive resistant rigid alumina skeleton, withstands collision during pond installation and regular cleaning maintenance.
  
• Non-toxic inorganic raw material without volatile organics, safe for food-grade aquaculture and seafood processing equipment.
  
• High hardness wear-resistant inner & outer surfaces, long service life under continuous water flow and gas flushing in breeding pools.

4. Key Limitations

• Not suitable for continuous long-term work in heavily turbid aquaculture water with massive sediment; pre-filter device is required to avoid micropore blockage.
  
• Susceptible to surface corrosion when exposed to concentrated hydrofluoric acid and strong alkaline chemical cleaners.
  
• Ceramic brittleness brings risk of breakage under heavy violent impact during transportation and on-site installation.
  
• Unit cost higher than disposable plastic aeration pipes, not the priority choice for low-investment large outdoor earthen ponds.
  

5. Main Industrial Applications

5.1 Intensive Aquaculture
Indoor circulating water fish & shrimp breeding tanks, fry hatching ponds, high-density lobster & crab culture facilities, indoor seafood temporary rearing pools.
5.2 Aquatic Product Processing
Live seafood transport oxygenation equipment, market seafood temporary breeding tanks, aquatic processing wastewater aerobic pretreatment system.
5.3 Environmental Water Treatment
Breeding waste water purification aeration units, landscape pond water circulation oxygen replenishment, micro-polluted river water restoration aeration facilities.
5.4 Laboratory & Viewing Equipment
Large ornamental aquarium oxygen supply system, biological laboratory microbial culture aeration accessories.
5.5 Agricultural Water Facilities
Greenhouse circulating water planting oxygenation auxiliary components, small farm water body aeration and disinfection supporting parts.

6. Material Positioning

Porous alumina aerator plate/tube fills the performance gap between disposable plastic aeration accessories and expensive titanium alloy microporous aeration parts. It delivers stable uniform microbubble aeration performance, long anti-corrosion service life and low maintenance cost, while possessing rigid ceramic hollow/plate structural design for efficient oxygen dissolution. Compared with rubber aeration tubes, it features anti-aging and anti-clogging advantages; compared with silicon carbide aerators, it achieves lower overall cost and stable fine bubble output. It is the preferred high-performance aeration core component for standardized intensive aquaculture, seafood temporary rearing and small-scale water environmental treatment projects.

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