In-vessel Composting: Difference between revisions
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==Types of Systems== | ==Types of Systems== | ||
In-vessel Composting can occur in a variety of systems typically | In-vessel Composting can occur in a variety of systems, which typically process 20,000 to 40,000 tonnes per year for the larger systems, including (pictures run top left to right): | ||
*Containers | *Containers | ||
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==Stages of an IVC<ref name="ivc" />== | ==Stages of an IVC<ref name="ivc" />== | ||
For the process to produce a soil conditioner to be used by farmers and others it must meet [[End of Waste Criteria]] and, in the majority of the UK, this is demonstrated by meeting the [[PAS100|Quality Protocol]] for compost and the associated Quality Standard [[PAS100]]. | |||
===Stage 1:=== | ===Stage 1:=== | ||
The [[Food Waste]] which has either been collected separately or with [[Green Waste]] is delivered to an enclosed reception area. Any contamination such as plastic bags, bits of metal etc are removed and the remaining material is shredded to a uniform size and consistency ([[Green Waste]] may be added to ensure the mixture has a structure to allow air to pass through the material during the treatment process). From there it is loaded into a first ‘barrier’ which will be a bay/tunnel etc depending on the system used. All the material delivered to a facility, plus the first barrier stage, is considered a ‘dirty area’ under [[ABPR]]. The regulations ensure that strict procedures are in place to prevent cross-contamination of ‘clean areas’ (where product is processed and stored) from ‘dirty areas’. | The [[Food Waste]] which has either been collected separately or with [[Green Waste]] is delivered to an enclosed reception area. Any contamination such as plastic bags, bits of metal etc are removed and the remaining material is shredded to a uniform size and consistency ([[Green Waste]] may be added to ensure the mixture has a structure to allow air to pass through the material during the treatment process). From there it is loaded into a first ‘barrier’ which will be a bay/tunnel etc depending on the system used. All the material delivered to a facility, plus the first barrier stage, is considered a ‘dirty area’ under [[ABPR]]. The regulations ensure that strict procedures are in place to prevent cross-contamination of ‘clean areas’ (where product is processed and stored) from ‘dirty areas’. | ||
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===Screening:=== | ===Screening:=== | ||
Screening usually takes place pre or post maturation, to produce a range of product grades suitable for various end uses such as soil conditioning<ref name="ivc2" />. | Screening usually takes place pre or post maturation, to produce a range of product grades suitable for various end uses such as soil conditioning<ref name="ivc2" />. | ||
The resulting product to come out of the process is a compost/soil improvement material | The resulting product to come out of the process is a compost/soil improvement material. | ||
==References== | ==References== | ||
<references /> | <references /> | ||