kent enviropower limited allington materials recycling facility update april 2011 james stapeley
TRANSCRIPT
Kent Enviropower Limited
Allington Materials Recycling Facility Update April 2011
James Stapeley
Overview of the MRF Operation
Designed for paper, plastic bottles, cans and card
Manual sort for product streams and quality
Job creation as part of the overall planning for the facility
Currently employs 31 staff
Process involves
•Bag splitter
•Trommel
•Picking cabin
•Ferrous and non-
ferrous separation
•Product baler
News & PAMS Mixed Paper Metals Residue
DISTRICT KERBSIDE COLLECTIONS
Mixed Plastic
Operating the MRF
To manage the plant at optimum efficiency:
Process as much material as possible
Provide the best quality material to end processors
Reduce residue levels
Maintain UK based material audit trail
Minimise risk to staff
Minimise downtime and stoppages
Variables:
Belt Speed
Number of Pickers
Picking Methodology
To improve efficiency operational trials have sought to understand the benefits of:
Number of pickers, increasing pickers from 12 to 28
Speed of belts, evaluating increase in production over quality of material
Type of material picked, i.e bagged/loose
Method of sorting, i.e positive/negative pick
Different borough qualities
Best methodology process proved to be increase of pickers, a set belt speed, and negative pick of mixed paper
By adapting a set methodology as a result, rejection rate settled and Allington material was not rejected by end reprocessors.
The Allington Materials Recycling Facility
MRF Trials 2009
0
5
10
15
20
25
30
1 2 3 4 5 6 7
Trial Number
Belt
spee
d/Pi
cker
s/Re
ject
%
Belt Speed Tonnes per hour No. of pickers Reject materials to bunker % Reject materials baled %
MRF Residue
Two Streams
1. PICKED RESIDUE - Waste picked off the belt to get at the value material – mainly consists of plastic bags and is baled. This is then sent to the MSW and energy recovered from it. Approx 10%
2. NON PICKED RESIDUE - All non picked (negative) material from the first belt- Direct to EfW bunker for recovery. Approx 10-13%
Picked Residue
There is a market for clean, 100% plastic bags/film overseas. Allington MRF cannot produce such a clean grade.
To reduce residue this material was originally sent to other MRF’s. After optimisation of Allington MRF material no longer accepted as no value attached.
ALL key waste management companies/end reprocessors/brokers have viewed material. All offer an EfW solution as the only viable solution for material.
Recent developments in industry point towards this material being potentially used to produce synthetic oils
Non Picked Residue
Initial studies carried out in March 2011 suggest this stream contains more target material.
Although the material is small and cannot be separated further at Allington MRF, graph shows initial analysis of stream.
Possible short term solution is to redirect residue belt into another area for transportation to another MRF.
Next steps are to discuss with other waste management companies and MRF’s willingness to accept this material moving forward, as well as gain more compositional analysis
MRF Residue Belt- Direct to Bunker
News and Pams61%
Shredded Paper7%
Cans4%
General rubbish/non target10%
Plastic Bottles7%
Cardboard7%
Other Plastics4%
News and Pams Shredded Paper
Cans General rubbish/non target
Plastic Bottles Cardboard
Other Plastics
Residue