Organic Waste Recycling | Composting Service

Organic Recycling

We provide a composting service for local authorities, horticultural businesses and agriculture. Our BSI PAS100 accredited compost provides an ecological and chemical free alternative to chemical fertilisers in agriculture. Research for the agricultural sector has demonstrated how it can increase yields with no negative impacts on crop quality or safety, and that it increases soil organic matter more quickly than other organic materials.

Download our guide on composts in Agriculture below

Premium Compost Green Compost

In Vessel Composting Process

Take a look through the steps we take for our In Vessel organic recycling

Step 1

Biodegradeable Waste

The garden waste and food waste arrives at the site in what’s called a co-mingled collection (ie it was collected in the same bin).

Step 2

Shred the Waste

The waste is then passed through a large shredder which breaks it down to less than 12mm in any one plane.

Step 3

Blending

The shred material is then blended with wood, food waste, and water as necessary to create the perfect blend that nature needs to make compost.

Step 4

Vertical Composting

The mix is then transferred via sealed conveyors into the vertical composting units (VCUs) where it remains for at least 3 days.

Step 5

Microbial Action

Natural microbial activity in the waste generates heat.

Step 6

Temperature Control

Temperatures then reach 70 degrees for a minimum of 1 hour continuously.

Step 7

Storage

The mix is then moved into the maturation building where it remains for around six weeks, and negatively aerated, to speed up the composting process.

Step 8

Maturity

Once the mix is mature and is now transformed into compost it is moved outside for its final stages.

Step 9

Screening

The now matured compost is then screened to 40mm particle size.

Step 10

PAS100

The compost is then graded, producing a PAS100 product material, which is no longer waste, but a resource.

Step 11

Fertiliser

This compost can now be used as a fertiliser in farming and agriculture.

Our Organic Compost

We provide two types of multi-purpose organic compost; green and premium. These composts have been processed under controlled conditions to produce a high quality product, as defined by the British Standards Institution's Publicly Available Specification 100 (BSI PAS100).

Green compost is a natural product made by mixing, stacking and turning biodegradable materials under managed conditions. The compost sold by Keenan Recycling Ltd has been made wholly from plant materials recycled from parks, gardens and households.

Food-derived, or premium, compost is a natural product made by mixing, stacking and aerating biodegradable materials under strictly controlled conditions in an in-vessel composting system with a separate maturation phase. The compost sold by Keenan Recycling Ltd has been made from a mixture of food waste from our commercial food waste collections, along with plant materials and organic waste recycled from parks, gardens and households.

Organic matter in soil is essential for good soil structure, water holding properties, microbial activity and soil health. Our composts are excellent soil conditioners, which can be used for garden compost or for agriculture. They add organic matter to the soils which helps to increase production through a range of benefits, such as:

Reduced need for bagged fertiliser.
Reduced nutrient leaching.
Increased yielding potential.
Potential to improve drainage in heavier soils.
Improved water-holding in light soils.
Reduced erosion risk.
Better soil structure leading to:
- Greater workability of the soil.
- Increased traffic tolerance.
Beneficial soil micro-organisms aid:
- Soil aggregation.
- Nutrient recycling.
- Plant disease suppression.

We operate Europe’s largest, and the world’s second largest, In-Vessel-Composting plant which takes co-mingled food and garden waste and turns it into premium grade, PAS 100 compost. It is an accelerated version of the natural composting process where biodegradable waste is fed into large, enclosed chambers with added heat, carefully controlled pH and microbial action to create premium grade compost in three days. Take a look at the individual steps above.

We also use open windrow composting to recycle purely garden waste. The material is shredded and formed into trapezium shaped piles and then monitored for moisture and turned to aerate over eight weeks. This produces a quality compost which is screened and sold to the agricultural or horticultural industry.

Watch our video below to learn more about organic recycling through us at Keenan Recycling.

Who we work with

Other Services

Biofuel

We provide a food waste recycling service through Anaerobic Digestion (AD). The food waste collected from your business breaks down in anaerobic containers. This breakdown creates biogases, methane and carbon dioxide, and a by-product, digestate. The digestate can be used for fertiliser, and the biogases can be used for electricity, heat, or even biofuel for transport.

Find out more

Shredding and Screening

We can supply various styles of shredder depending on your requirements. The high speed Jenz BA725 machines have large throughputs and can cope with materials such as garden waste, wood waste and bark.

Screening is a very specialised activity and it is important that the correct style of machine is attributed to the material controlled by operators that have experience of dealing with diverse waste streams.

Find out more

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