Methods and Technology
Explore practical ways to prevent, divert, process, and recover value from organic waste. Compare each method by feedstock, scale, land, labour, climate, utilities, output, and risk before making a decision.
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Explore Methods
Learn How each method works, what it’s suited to and the key considerations for your context.
Organic waste method
Anaerobic Digestion and Biogas
Anaerobic digestion uses microorganisms without oxygen to produce biogas, mainly methane and carbon dioxide, plus digestate. A successful system needs stable feed, gas safety, trained operation, and…
Organic waste method
Black Soldier Fly Larvae Processing
Black soldier fly larvae can consume selected organic feed quickly in warm conditions. The system is biological livestock production, so it needs containment, climate management, hygiene, harvesting,…
Organic waste method
Bokashi Fermentation
Bokashi is an air limited fermentation method that uses inoculated bran or another validated culture. It can store a wide range of food scraps compactly, but the…
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Organic waste method
Community Composter
Pits, masonry bins, cages, and rack systems use managed aerobic decomposition with simple infrastructure. They can be robust and affordable, but they need enough space for active…
Organic waste method
Home Container Composting
Home container composting is a practical choice for households, small kitchens, offices, and demonstrations. The container is only the vessel. Successful composting still depends on clean segregation,…
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Organic waste method
In-Vessel Composting
In vessel systems process organic waste inside enclosed equipment. They may reduce footprint and improve control, but they still require clean feed, bulking material, trained operators, power…
Organic waste method
Leaf and Garden Waste Composting
Garden waste is a valuable source of carbon and structure. Leaves can be composted alone as leaf mould or blended with food waste. Branches and tough stems…
Organic waste method
Safe Food Diversion to Animals
Some clean food residues may be suitable for authorised animal feeding or farm partnerships. This is a prevention and diversion route, not a disposal shortcut. Feed suitability,…
Organic waste method
Vermicomposting
Vermicomposting uses selected earthworms and microorganisms in a cool, moist, aerated bed. Worms are living stock, so the system must avoid heat, flooding, drying, predators, and unsuitable…
Organic waste method
Windrow and Aerated Static Pile Composting
Windrows are long piles that are turned to restore oxygen. Aerated static piles use a structured mix and an air distribution system, so frequent turning may not…
Start With the Waste, Not the Machine
A practical, step-by-step process to help you choose the right method or combination of methods.
Measure the Waste
Understand the type and amount of organic waste you have.
Prevent and Divert
Reduce waste at source and keep suitable materials out of landfill.
Assess the Site
Consider space, land, climate, utilities and local conditions.
Shortlist Methods
Identify the most suitable options for your context.
Run a Pilot
Trial at a small scale with representative waste.
Select the Complete System
Choose and design a system that fits your needs and resources.
Quick Comparison
A side-by-side view of key factors to help you compare methods. Use this as a starting point, as suitability depends on your specific context.
| Method | Best Fit | Land and Power | Main Strength | Critical Caution |
|---|---|---|---|---|
| Home Container Composting | Small household or office quantities | Very low land, usually no power | Local and simple | Needs routine care and curing |
| Community Composter (Pit, Bin and Rack) | Community and institutional sites | Moderate land, low power | Repairable and flexible | Drainage, labour, and curing space |
| Windrow and Aerated Static Pile Composting | Medium to large sites with consistent segregated feed | Higher land requirement; power varies with aeration | Scalable and adaptable | Weather, odour, leachate, turning, and curing must be managed |
| Vermicomposting | Clean partly decomposed feed | Moderate protected area, low power | Fine product | Worms are temperature and feed sensitive |
| Bokashi Fermentation | Small contained food handling | Very low land, no process power | Useful pre-treatment | Requires a second stage |
| In-Vessel Composting | Space-constrained managed sites | Lower active footprint, usually power | Enclosed controlled processing | Service, operating cost, and curing |
| Anaerobic Digestion and Biogas | Steady feed with energy use | Engineered site and power needs vary | Renewable gas | Gas safety and digestate |
| Safe Food Diversion to Animals | Clean suitable residues near authorised user | Storage and transport | Prevents treatment | Veterinary and traceability controls |
| Black Soldier Fly Larvae Processing | Specialist warm controlled facility | Contained area and climate control | Rapid biological conversion | Product rules and lifecycle expertise |
| Leaf and Garden Waste Composting | Seasonal garden residues | Storage and processing area | Carbon and mulch supply | Fire, litter, and seasonal peaks |
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Swipe or scroll horizontally to view the complete comparison.
Core Aerobic Controls
Good aerobic composting depends on a few key factors. These controls help create the right conditions for microbial activity.
Carbon and Nitrogen
Aim for a balanced mix of "browns" (carbon) and "greens" (nitropen) to support microbial activity.
Moisture
Keep moisture around 50-60% (like a wrung-out sponge). Too dry slows decomposition, too wet reduces air space.
Air and Structure
Maintain air and structure by using bulky materials and avoiding compaction to preserve pores.
Temperature and Curing
Allow the pile to heat up, then cure adequately. Check for stability (cool, earthy smell, no fresh feedstock visible) before use.
Publishing and Implementation Principles
Follow these principles when sharing information, comparing methods, procuring equipment, and putting organic waste systems into practice.
Publish methods as choices with operating conditions, not as universal recommendations. Confirm practical capacity through a monitored site trial using representative waste and ordinary staffing.
Do not rely only on the capacity printed in a brochure.
Do not describe fresh machine discharge, dehydrated material, or fermented Bokashi material as finished compost without appropriate curing and verification.
Confirm applicable local permissions, product standards, animal-health requirements, worker-safety duties, and pollution controls before implementation.
Use current technical specifications and quotations obtained through a controlled procurement process. Do not publish personal vendor contact details or rely on outdated quotations.
Use the portal for education, method comparison, preliminary planning, and operational guidance.
Site design, structural work, electrical systems, gas systems, drainage, fire safety, and slope stability require assessment and implementation by competent professionals.