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Also in Household Waste:
Organic Waste Collection and Recycling Service | Kerbside Recycling Service|
Public Recycling Sites | Civic Amenity Sites | The Wight Family | Waste Cycle|
Waste to Energy | Composting | Landfill | Nappies
Island Waste Services operate two distinctly separate composting operations at their Lynnbottom site.
1. Garden Waste composting.
Garden waste is collected separately at all of the Island's Civic Amenity sites. It is also brought to the weighbridge at the main Lynnbottom site by local businesses such as landscape gardeners and grounds maintenance contractors.
All of this collected garden waste is processed as follows:
- the garden waste is shredded and stored in an adjacent Dutch barn for approximately one week.
- as soon as the waste is shredded the decomposition process starts with the action of microbes causing the waste to heat up.
- the decomposing garden waste is then transferred to a large area of concreted hard-standing located at the far end of the site where the bacterial decomposition process can continue.
- each batch of compost is labelled , showing the time during which the feedstock was collected and the temperature at the core of the pile is recorded for a specified period of time.
- during the decomposition process the waste is turned as appropriate to ensure that all material is subjected to the high core temperatures for an optimum amount of time.
- the batch will gradually generate less and less heat as the microbial action uses up all the available material . The composting process is usually complete within four or five months.
- the compost is now screened to eliminate the larger woody pieces that were important for aeration during decomposition.
- once screened the compost is batch sampled and analysed.
- the analysis will indicate the nutrient content of the compost and confirm that the high core temperatures have successfully eliminated weed propagules and other pathogens.
This composting process is AEROBIC. It uses Oxygen and produces Carbon Dioxide.
Isle of Wight Compost is now ready for sale.
Isle of Wight Compost
It is a product that is nutrient rich and is therefore excellent as a soil improver; it will replace all the goodness that your growing plants remove and is therefore vital for continued good plant growth.
The compost is bagged and sold locally at all three Civic Amenity Sites.
It can also be purchased in bulk; a far cheaper option if you have a medium/ large garden.
Isle of Wight compost is purchased by Arreton Valley nurseries for growing organic tomatoes as well as numerous other businesses.
For more information on the sale of Isle of Wight Compost in larger (bulk) quantities please phone us. 0800 328 3851 or contact us.
Isle of Wight Compost has the Composting Associations PAS 100:2005 accreditation. A standard providing confirmation of the compost's quality.
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2. The Wright In- Vessel Composting plant.
Background
This new facility was built on the Lynnbottom site between July and December 1998. It was commissioned in January 1999.
The Wright In-Vessel plant was designed to process a mixture of organic kitchen waste and garden waste, in a ratio of 2 parts of kitchen waste to 1 part of garden waste.
The process
The kitchen organic waste is obtained as follows:
- Island residents can request an organic waste bucket. This small 10 litre lidded bucket can then be used for the collection of all organic kitchen waste (fruit and vegetable peelings, tea bags, egg shells, cooked and uncooked food, fish and meat bones). The bucket can be lined with a carrier bag as this is extracted from the organic waste during the processing. The bucket is collected weekly at the same time as the general household waste and placed in a separate section of special split-bodied Refuse Collection Vehicles.
- School kitchens are provided with wheeled bins in which to place organic waste.
- Some Hotels, Public Houses and Restaurants have opted to separate their organic kitchen waste for composting.
These three separately collected feedstocks are transported to the Wright In -Vessel plant and offloaded in the reception hall. The waste is then shredded and processed through a trommel screen (eliminating the plastic bags) and finally into a hopper where it is mixed with the screened rejects from the Resource Recovery Facility.
This mixed waste is then fed into one of the three composting tunnels.
Each tunnel is a rectangular box, 40 metres long, 3 metres high and 3metres wide. The waste moves along the tunnel on a tray (each tunnel comprises 40 trays). The waste is totally contained within this system for 14 days. Within the tunnel optimum temperatures of 55-65 degrees centigrade are maintained in order to eliminate pathogens. Inlet fans suck fresh air into the system and force the air through the composting material. Exhaust fans suck the air out of the tunnels and force it through a Bio- Filter. The Bio-Filter is the process through which possible odours are eliminated. Finally, discharge augers extract the waste from the tunnels and it is loaded into tractor-trailers.
The In-Vessel compost is used as daily landfill cover.
This composting process is AEROBIC it uses Oxygen and produces Carbon Dioxide.
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