RPE pond liner is a specialized geotechnical product for biogas digester construction, offering longevity, easy installation, low cost, and excellent seepage resistance. It’s non-toxic and eco-friendly, making it popular for septic tanks, biogas tanks, and oxidation ponds. Unlike traditional digesters, HDPE-lined tanks process organic matter efficiently, are environmentally friendly, easier to clean, transport, and safer against explosions. They boast high organic matter removal rates, with COD reduction over 78% and BOD over 82%. Multi-stage filtration prevents sludge floating, ensuring neutral effluent and good sanitation. Additionally, they generate quality biogas, surpassing conventional systems in performance and safety.
Issue
Economic growth and social progress have enhanced urban living standards, yet rural areas face ongoing challenges. To build a prosperous society, eco-friendly farming, environmental enhancement, and income growth for farmers are vital. Biogas digesters, lasting around 20 years, offer a comprehensive solution by saving energy, protecting the environment, reducing chemical usage, boosting crop yields, and supporting livestock rearing. These “fully enclosed anaerobic ponds,” lined with impermeable RPE and constructed with cost-effective HDPE geomembranes following CJ-T 234-2006 standards (≥1.5mm thickness), ensure efficient fermentation and gas storage. They facilitate quick, durable construction, easy operation, extended sewage retention, effective digestion, minimal maintenance, high biogas output, electricity generation potential, heat preservation via black film, and automated sludge management, all contributing to reduced pond sludge and a sustainable rural transformation.
Solution
Biogas digesters, also known as covered lagoons or geomembrane biogas digesters, are popular on farms. They utilize black HDPE geomembrane covers or liners for fermentation and storage, often employing black RPE pond liners. These liners provide benefits like easy and fast construction, low cost, simple operation and maintenance, extended sewage retention, efficient digestion, and superior sealing. RPE geomembrane boasts high tensile strength, aging and corrosion resistance, effective anti-seepage, and good heating/heat preservation. It reduces sludge with an automatic mud drainage system. Installing HDPE anti-seepage liners requires thorough substrate and liner checks, seams with at least a 100mm overlap along the slope, and secure pipe bonding via extrusion welding. RPE liners, made from quality HDPE, meet standards, offering strong durability, aging/corrosion resistance, and effective anti-seepage properties. Suitable for various slope sites, they serve as primary anti-seepage materials in biogas digesters.
Benefits
The black RPE pond liner in biogas digesters enhances fermentation by absorbing heat, prevents leakage, and supports anaerobic processes. It’s laid on excavated soil with an HDPE anti-seepage geomembrane. Key components include water inlet/outlet, slag extraction, and a ø200mm PE gas pipeline. Anchor ditches secure the geomembrane, forming an anaerobic space. The HDPE impermeable liner, made from quality polyethylene resin, is 1.0mm thick for base lining and at least 1.5mm for covers. RPE liners are non-toxic, cost-effective, eco-friendly, resolving leakage and corrosion issues of but need more area and safety measures for electricity generation.
Case Study of RPE Pond Liner for Biogas Digester Project
Black HDPE geomembrane liners in biogas digesters auto-separate water and slag, aiding residue removal. They enhance sanitation by processing manure through composting and anaerobic fermentation, reducing pollution and breeding grounds for harmful organisms. These liners enable high daily sewage, biogas, and electricity production with large capacities. They offer cost-effective construction, easy maintenance, and repairs compared to traditional digesters. Long retention times and optimal temperatures ensure complete fermentation, high biogas yield, and reduced COD in treated sewage. Black liners suit farm pollution control. Construction tips: horizontal welding, consider wind direction, follow slope requirements, and avoid welds near the bottom.
Indonesian Biogas Digester Challenge
In May 2021, Indonesia wanted to order HDPE geomembrane products for his biogas digester project. Through email communication, we learned that the area that the biogas digester is basically a brick-concrete structure. The initial use is ideal, but after a period of usage, individual biogas digester was cracked and the collapse phenomenon caused air leakage and could not be used, which caused huge losses to farmers. At the same time, it also had a great negative impact on the later publicized ecological agriculture. The customer found us on the network platform and inquired about our geomembrane product prices, product quality, service life and construction methods, etc. In response to customer doubts and questions, we gave customers detailed answers and sent samples for them as soon as possible. After one week, the customer successfully signed the order contract.
RPE Pond Liner for Biogas Digester Project in Indonesia
- Specifications – 1.0mm (bottom lining), 1.5mm (Cover)
- Each Roll Size – 6*50m
- Quality -125,000㎡
About GEOSINCERE
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