@2019 by Allium Energy. Created by O BRAND

OPEN WINDROW COMPOSTING

What we do:

Open windrow composting of Green Wastes including garden and horticultural wastes into a compost. This compost to be used on agricultural land as a soil improver.

How we do it:

Biodegradable wastes including domestic green waste, horticultural and garden wastes are received at the composting sites, shredded and formed into piles, called windrows. Depending on size of the site the windrows vary in size but normally each windrow is  approximately 30m long by 5m wide and 4m high. Once the windrows have been formed, the temperature of these windrows are monitored with temperature probes, initially to ensure that the pile sanitization temperatures are met.

 

After sanitization the windrows are turned regularly to ensure that the biological process is completed, this where the compost cools down and stabilises. This process of sanitization and stabilisation takes between 6 and 8 weeks. The activity of Open windrow composting is controlled by the environment agency and the sites needs an Environmental Permit to operate. The recognised standard for the compost at the end of stabilisation is PAS100. This means that the compost ceases to be a waste and becomes a product.

 
 

IN VESSEL COMPOSTING

What we do:

In Vessel Composting  is a a system used for a higher risk organic waste, such as MSW fines which contains former food stuff, material unsuitable for human consumption and non-source segregated food wastes.  As such this waste needs to be treated in large sealed chambers inside a building, to prevent any risk to the environment. 

How we do it:

The organic fines input arrives directly to site, where is it mixed and then placed into the concrete chambers, each chamber has the capacity to take about 300 tonnes of organic fines wastes. Once the chambers are full they are sealed to accelerate the decomposition, the air exiting the chambers is directed through a biofilter to remove any harmful bio-aerosols and control all potential emissions. The wastes are monitored continuously for temperature and retained within the chambers for up to 2 weeks for sanitization. During this phase compliance with ABPR regulations are achieved.

After sanitization the material is taken from the chambers and placed into a maturation area, where is it turned until it cools down. At the end of the process the organic waste becomes a Compost Like Output [CLO] and will have reduced in weight and volume by up to 20%.

 

SOIL SUBSTITUTES

What we do:

Soil Substitutes are a blend of wastes to create a synthetic soil suitable for use in non-agricultural applications.

How we do it:

The compost produced from In Vessel Composting sites MBT plants are not suitable for use on agricultural land and are often referred to as Compost Like Output [CLO].

Over the last three years we have worked with a number of universities and the Environment Agency, to create a recipe of organic and in-organic wastes, including CLO, non-compliant sewage, construction fines and BPD, that when blended produce a synthetic soil, that has both the growing characteristics, chemical composition and appearance of soil.