Organic waste composting covered with semi-permeable membrane

Organic Waste Composting Covered with Semi-Permeable Membrane

Brief Product & Technology Introduction

The semi-permeable membrane covered composting system is an advanced aerobic composting technology specially designed for the harmless treatment and resource recycling of all types of organic waste, including livestock manure, agricultural straw, kitchen waste, sludge, garden trimmings and other biodegradable raw materials.

Unlike traditional open-air composting or simple plastic film covering, the core of this process is a high-performance semi-permeable ePTFE membrane laid over the compost pile as a fully sealed covering layer, which builds a controllable microenvironment inside the compost body while isolating external adverse conditions.

Core Working Principle

1. Selective Gas ExchangeThe microporous structure of the semi-permeable membrane realizes one-way selective ventilation: water vapor, carbon dioxide and heat generated during aerobic fermentation can smoothly penetrate and discharge outwards; meanwhile, odor molecules, ammonia gas, fly breeding sources, dust and rainwater are completely blocked from escaping or infiltrating. It solves the long-standing contradiction between ventilation and deodorization in conventional composting.

2. Stable Aerobic Fermentation EnvironmentWith the membrane covering, the internal temperature of the compost pile can be steadily maintained at 55–70 °C for more than 7 consecutive days. High-temperature aerobic fermentation fully kills pathogenic bacteria, parasite eggs, weed seeds and harmful microorganisms inside organic waste, meeting national harmless treatment standards.

3. Moisture & Humidity Balance ControlThe membrane prevents rainwater from soaking the compost raw materials to avoid excessive moisture and anaerobic odor fermentation. It also locks internal fermentation humidity, reducing the frequency of manual water supplementation and cutting operation labor costs.

Outstanding Advantages

1. Excellent Odor & Pollution ControlZero outward leakage of pungent odor such as hydrogen sulfide and ammonia, no secondary air pollution. It eliminates fly and mosquito breeding, greatly lowering environmental complaints and meeting strict regional environmental protection emission standards, suitable for farms, suburban waste treatment plants and residential surrounding projects.

2. All-Weather Operation, Less Site RestrictionNo need for large closed workshop or complex deodorization exhaust systems. The membrane cover works normally in rainy, snowy and windy weather, saving huge investment in factory construction and waste gas treatment equipment compared with enclosed composting workshops.

3. Short Fermentation Cycle & High Fertilizer QualityConstant high-temperature fermentation accelerates organic matter decomposition. The whole composting cycle only takes 20–35 days, much shorter than open composting. The finished compost features high humus content, uniform nutrient composition, and can be directly processed into organic fertilizer for farmland, orchards and green planting.

4. Low Operation & Maintenance CostThe semi-permeable membrane has strong tensile strength, anti-ultraviolet aging and long service life. No continuous power consumption for exhaust deodorization; only simple regular turning and auxiliary oxygen supply are required, effectively cutting daily electricity and labor expenses.

5. Small Land Occupancy & Flexible LayoutCompost piles can be stacked in higher layers under membrane coverage, improving land utilization rate. The membrane can be freely unfolded and folded, supporting modular, scalable construction for both small decentralized treatment and large centralized organic waste disposal bases.

Wide Application Scope

• Livestock breeding waste: cow manure, pig manure, chicken manure, sheep manure

• Agricultural organic waste: crop straw, fruit and vegetable residues, mushroom dregs

• Municipal organic waste: kitchen waste, garden waste, landscaping trimmings

• Solid organic sludge: biogas residue, sewage plant sludge, fermentation residues

End Product Value

After complete membrane-covered aerobic composting, the decomposed organic materials become mature organic fertilizer raw materials. This recycled product can improve soil structure, increase soil organic matter, reduce chemical fertilizer application, realize circular agriculture, and achieve the dual goals of organic waste reduction, harmless disposal and resource reuse.

Conclusion

Semi-permeable membrane covered organic waste composting is a low-carbon, economical and environmentally friendly solid waste treatment technology. It balances treatment efficiency, environmental protection input and operational cost, and has become a mainstream preferred solution for organic waste resource utilization worldwide.