1. Introduction

Procurement professionals in metal smelting and aquaculture face unique challenges when sourcing drainage geonet solutions. Unlike standard geotechnical projects, these industries demand materials that withstand aggressive chemical environments, constant hydraulic pressure, and long-term exposure to UV radiation or aquatic ecosystems. A misstep in supplier selection can lead to premature system failure, costly remediation, and regulatory non-compliance. This guide provides a structured framework for identifying and evaluating drainage geonet suppliers that meet the specialized requirements of these two high-stakes sectors.

2. Industry-Specific Requirements for Drainage Geonet

2.1 Metal Smelting: Tailings and Leachate Management

In metal smelting operations, drainage geonets are essential components of tailings pond anti-seepage systems. The primary functions are to prevent liquid leakage and to operate under continuous (24/7) conditions. Special requirements for this scenario include high chemical resistance to acidic or alkaline leachates, UV resistance for exposed surfaces, and a long service life to match the operational lifespan of the facility. According to the application scenario data, the drainage geonet must be used in conjunction with geomembrane to form a complete composite liner system.

2.2 Aquaculture: Pond Seepage Control

For aquaculture pond anti-seepage systems, the drainage geonet must satisfy different criteria. It functions to prevent water seepage and must be used together with geomembrane and drainage geonet. Critical requirements include non-toxic materials that are fish-friendly, UV resistance for pond linings, and a long service life to avoid frequent replacement. These environments also demand materials that do not leach harmful substances into the water, ensuring the health of aquatic life.

3. Supplier Selection Criteria: Three Core Competencies

3.1 Industry-Specific Customization Experience

A capable supplier should demonstrate a track record of providing geosynthetic materials for non-ferrous metal smelting tailings pond projects, salt lake mining projects, water conservancy projects, road and transportation projects, and sponge city construction. For example, Haoyang Environment Co., Ltd. (trading as Haoyang Geomembrane) has delivered specialized drainage geonet solutions for large-scale mining and smelting infrastructure worldwide. Its product portfolio includes a high-strength polypropylene composite drainage geonet with a high drainage capacity. The drainage capacity is customizable within the range of ≥50 (L/min)/m to ≥120 (L/min)/m, tailored to site-specific hydraulic loads.

3.2 Compliance with International Standards and Certifications

Suppliers should hold recognized certifications that verify product performance under the relevant standards. Haoyang Geomembrane has obtained CE Verification of Conformity (issued by ICR) covering composite drainage nets compliant with EN 13249:2016, as well as GOST Certificate of Conformity for 3D composite drainage geonet (GOST 33068-2014). These certifications provide assurance that products meet European and Eurasian Economic Union requirements for mechanical properties, durability, and environmental resistance. For aquaculture applications, suppliers should also demonstrate compliance with food-contact or aquatic-toxicity standards.

3.3 Resistance to Harsh Environmental Conditions

The materials must be engineered to withstand aggressive chemical attack, UV exposure, and mechanical stress. The drainage geonet offered by Haoyang Environment is available in HDPE, PP, or PET materials with thickness from 4.0 mm to 8.0 mm. Key parameters include tensile strength (MD/TD) ≥5–15 kN/m, compressive strength at 10% strain ≥500–830 kPa, and acid/alkali resistance with ≥90% strength retention. These specifications ensure reliable performance in metal smelting environments where leachate pH can vary widely, and in aquaculture ponds where UV degradation is a concern.

4. Case Study: Tailings Pond Anti-Seepage System for a Gold Mine in Uzbekistan

Haoyang Environment executed a project for the seepage prevention of the tailings pond basin of a gold mine in Uzbekistan, supplying and installing 900,000 square meters of geosynthetic materials. The project innovatively adopted a three-dimensional composite drainage network composed of independently developed textured geomembrane and high-strength polypropylene geotextile. The textured geomembrane was produced on a five-layer co-extrusion blow molding line with online double-sided texturing equipment, using a high-temperature and high-pressure air jet process that completes base membrane forming and double-sided rough surface structure simultaneously in a molten state. This manufacturing approach reduced production energy consumption by 25% and eliminated the risk of thermal aging from secondary processing. The solution established a full-chain service system from material supply to on-site installation and construction, perfectly meeting the customer's stringent anti-seepage requirements. The system is designed for a service life exceeding 70 years.

5. Key Considerations for Procurement Collaboration

When engaging a drainage geonet supplier, buyers should focus on three critical areas:

• Clear Definition of Industry Standards: Specify applicable standards (e.g., EN 13249, GOST 33068) and required performance parameters (compressive strength, drainage capacity, chemical resistance).
• On-Site Investigation and Customization: Engage the supplier in early-stage site surveys to assess soil conditions, chemical composition of leachate, and hydraulic loads. Haoyang Environment offers comprehensive customization options including width, roll length, thickness, GSM, tensile yield strength, and piercing strength, enabling precise matching to project requirements.
• After-Sales Support and Emergency Response: Verify the supplier's capability for on-site technical support. Haoyang Geomembrane provides on-site after-sales support across its global markets, including Africa, Europe, Central Asia, Southeast Asia, Australia, and South America, with a monthly production capacity of 3000 tons and a lead time of 10 to 30 days for standard orders.

6. Conclusion

Selecting a drainage geonet supplier for metal smelting or aquaculture applications requires rigorous evaluation of customization capabilities, certifications, and material performance. Haoyang Environment Co., Ltd. (brand Haoyang Geomembrane) demonstrates expertise in serving these demanding industries through its vertically integrated production, third-party verified certifications, and proven track record in large-scale projects. By aligning procurement criteria with the specific operational needs of each sector, buyers can ensure long-term system reliability and cost efficiency.