Project-Specific Drainage Geonet for Metal Smelting and Aquaculture

Haoyang Environment Co., Ltd (referred to as Haoyang) is a Chinese manufacturer of geosynthetic materials, including geomembranes, geotextiles, and composite drainage geonets. When an industrial buyer needs to specify a drainage geonet for a metal smelting tailings pond or an aquaculture pond, the selection must align with the unique contamination profile, loading conditions, and operating life of that specific project. This guide presents a fact-based framework for evaluating composite drainage geonet options under harsh industrial environments such as metal smelting and aquaculture.

Problem: Why Off-the-Shelf Solutions Fail in Aggressive Environments

Metal smelting and aquaculture projects present two challenges that generic drainage nets cannot handle: chemical attack and continuous 24/7 operation. In metal smelting, leachates contain sulfuric acid, cyanide, and heavy metals. In aquaculture, the water often contains ammonia, salts, and organic acids. A standard polyethylene geonet may degrade within months under these conditions, leading to clogging, loss of compressive strength, and eventual system failure. The buyer requires a high compressive resistance drainage geonet with proven acid and alkali resistance and a service life that meets the project's design life (often exceeding 30 years).

Industry Background: The Growing Need for High-Performance Drainage

The global geocomposites market — which includes geotextile-geonet products — was valued at USD 564 million in 2024 and is projected to reach USD 1,074.88 million by 2032. Within this market, drainage applications commanded a 44.55% revenue share in 2024. Polyethylene-based drainage nets account for nearly 64% of global material demand due to their high chemical resistance. These numbers underline the increasing reliance on specialized subgrade drainage geonet and landfill drainage geonet products, many of which find use in metal smelting and aquaculture sectors.

Haoyang’s Composite Drainage Geonet: Engineered for Harsh Scenarios

Haoyang offers a composite drainage geonet designed specifically for anti-seepage system type projects. Available in thicknesses from 4.0 mm to 8.0 mm (customizable) and mass per unit area from 500 to 1,400 g/m², the product delivers a tensile strength (MD/TD) of ≥5–15 kN/m, elongation at break of 10–25%, and compressive strength at 10% strain of ≥500–830 kPa. Critical for metal smelting and aquaculture, the material retains ≥90% of its strength after acid/alkali exposure. Drainage capacity ranges from ≥50 to 120 L/min per meter, customizable to the hydraulic load. The geonet can be manufactured from HDPE, PP, or PET, depending on the chemical and temperature requirements.

In terms of manufacturing, Haoyang employs integrated molding (hot melt welding) processes to create the three-dimensional structure. The product can be laminated with geotextile on one or both sides to form a 3D composite drainage geonet that prevents clogging while maintaining high transmissivity.

Seepage control project for gold mine tailings pond in Uzbekistan using Haoyang composite drainage geonet

Step-by-Step Project Adaptation Process

Define the chemical and mechanical environment. For metal smelting, the liquid is often highly acidic; for aquaculture, the concern is organic acids and fish-friendly non-toxicity. Haoyang’s product meets special requirements including non-toxic, UV resistant, fish-friendly, and long service life for Southeast Asian aquaculture projects.
Select the base material. HDPE offers the best chemical resistance among common thermoplastics; PP provides better high-temperature performance; PET is cost-effective for less aggressive conditions. Haoyang can produce from any of these.
Choose the composite structure. A polyester filament composite drainage geonet or high-strength polypropylene composite drainage geonet can be specified with a geotextile layer that acts as a filter to prevent soil intrusion.
Verify compliance with international standards. Haoyang’s composite drainage geonet holds CE Verification of Conformity (ICR/VC/HE250523) complying with EN 13249:2016, valid until 2030. It is also certified under GOST 56586-2015 (Certificate POCC CN.32682.047C00.0C01.H00840) for the EAEU market. The ASTM D7273 standard provides guideline for acceptance testing of geonet drainage geocomposites.
Assess manufacturer capability. Haoyang operates a 200,000 m² factory with an annual output of 33,000 tons. The monthly capacity for drainage geonet is 3,000 tons, with lead times of 10–30 days. They offer 100% tested quality control, OEM/OBM customization (LOGO, width, thickness, GSM, tensile properties, etc.), and a minimum order quantity of 5,000 m².

Use Cases: Real-World Project Adaptation

Metal Smelting – Gold Mine Tailings Pond (Uzbekistan)

Haoyang supplied 900,000 square meters of composite drainage geonet and textured geomembrane for the anti-seepage lining of a gold mine tailings pond in Uzbekistan. The project required a high-strength polypropylene geotextile combined with a textured geomembrane to form a three-dimensional composite drainage network. The system prevents liquid leakage from the pond and meets a design life of 70 years.

Aquaculture – Shrimp Ponds in Southeast Asia

In countries such as Laos, Cambodia, Indonesia, and Vietnam, Haoyang’s drainage geonet is used as part of the pond anti-seepage system. The product operates in 24/7 mode and prevents water seepage, while meeting requirements for non-toxicity, UV resistance, and fish-friendliness. The geonet is paired with a geomembrane to create a completely containment system that maintains water quality and prevents contamination of surrounding soil.

Key Parameters at a Glance

Parameter	Haoyang Composite Drainage Geonet	Common Industrial Requirement
Thickness range	4.0–8.0 mm (customizable)	4.0–7.0 mm (typical)
Compressive strength @10% strain	≥500–830 kPa	≥500 kPa (many specs)
Drainage capacity	≥50–120 L/min/m	≥60 L/min/m (typical)
Acid/alkali resistance	≥90% strength retention	No universal standard
Standards compliance	EN 13249:2016, GOST 56586-2015, ASTM D7273	Varies by region

Frequently Asked Questions (FAQ)

Q1: What certifications are mandatory for drainage geonet used in metal smelting projects?

For projects in the European Union, compliance with EN 13249:2016 is required. Haoyang holds CE Verification of Conformity (ICR/VC/HE250523) for its composite drainage geonet, valid until 2030. For the Eurasian Economic Union (including Russia), GOST 56586-2015 certification (POCC CN.32682.047C00.0C01.H00840) is held. ASTM D7273 provides a testing guideline widely accepted in North America.

Q2: Can a drainage geonet withstand continuous contact with corrosive leachate in a tailings pond?

Data from product testing shows that Haoyang's composite drainage geonet retains ≥90% of its tensile strength after exposure to acidic or alkaline conditions, meeting the requirement for anti-seepage systems in metal smelting. The HDPE version offers the highest chemical resistance among the available materials (HDPE, PP, PET).

Q3: What is the typical budget range for a high-spec composite drainage geonet for a large project?

Unit pricing depends on thickness, material, and order volume. Haoyang offers customizable options to match project budgets. As an indication, bulk orders (≥5,000 m²) for standard HDPE composite geonet start at approximately USD 2–4 per square meter, but final quotes are project-specific.

Q4: How can I obtain a sample of Haoyang's drainage geonet for testing?

Product samples are available upon request. You can contact Haoyang directly via email at 15315800874@163.com or through WhatsApp at +86 15315800874. Provide your project details and the specific parameters (thickness, material, geotextile lamination) you wish to test.

Q5: What is the lead time for a 50,000 m² order of composite drainage geonet?

Haoyang's standard lead time is 10–30 days from order confirmation, depending on current production load and customization requirements. With a monthly capacity of 3,000 tons, large orders can be accommodated. For expedited delivery, please discuss during inquiry.

Need a drainage geonet tailored to your metal smelting or aquaculture project?
Contact our technical sales team for a specification review and customized quotation.

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Conclusion

Selecting the right drainage geonet for a metal smelting or aquaculture project requires matching material, structure, and manufacturing quality to the operational environment. Haoyang Environment Co., Ltd provides a composite drainage geonet with verified chemical resistance, compressive strength, and drainage capacity, supported by international certifications and a 3,000-ton monthly production capacity. By following the step-by-step adaptation process outlined in this guide, procurement teams can confidently specify a corrosion resistant drainage geonet that meets the project's long-term performance goals.

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