Date post: | 09-Apr-2018 |
Category: |
Documents |
Upload: | worm-composting |
View: | 215 times |
Download: | 0 times |
of 11
8/8/2019 Aerobic Composting Technologies
1/11
Aerobic Composting Technologies:
Process Options
Workshop: Composting of Organics
June 24, 2008
Charles W. Peterson, FEU
Technology Options
Windrow
- Self propelled
- Towable straddle turner
- Power Take-Off (PTO)
Aerated Static Pile
In-vessel
- Enclosed aerated static pile
- Agitated bed- Rotary drum
Vermicomposting
8/8/2019 Aerobic Composting Technologies
2/11
Technology Tradeofffs
BestMediumLeastEnvironmental
MostMediumLeastCost
BestMediumLeastProcess
Primary: 7-10
Curing: 30
Primary: 21-30
Curing: 30
Primary: 30-45
Curing: 30Time (days)
LeastMediumMostLand
In-VesselAerated Static
Pile
Windrow
Windrow
Self Propelled Straddle Turner Pile dimensions limited by size of turner
- Height: 2-3 m, Base: 4-5 m
Equipment specs (motor) determine daily turning
capacity
CAPEX: $200,000 - $350,000
Images: http://organic.tfrec.wsu.edu/compost/ImagesWeb/CompEquip.html
http://www.gemacosales.com/products/wildcat/selfpropelled_compost_turners.htm
8/8/2019 Aerobic Composting Technologies
3/11
Windrow
Elevating (Self Propelled / Towable) Turner
Windrow height can be higher than straddle
turner
Images: http://organic.tfrec.wsu.edu/compost/ImagesWeb/CompEquip.html
Windrow: Towable Straddle Turner
Less expensive then self propelled, more area
needed for maneuvering area between windrows
CAPEX: $60,000 - $100,000
Images: http://organic.tfrec.wsu.edu/compost/ImagesWeb/CompEquip.html
8/8/2019 Aerobic Composting Technologies
4/11
Composting Windrow
Power Take-Off (PTO)
On-farm use - low daily throughput
Single / double pass
Images: http://organic.tfrec.wsu.edu/compost/ImagesWeb/CompEquip.html
http://www.ibiblio.org/steved/Luebke/Luebke-compost2.html
Composting: Aerated Static Pile
Forced aeration air draw down through a pile or
upwards (in-vessel)
- Air treatment - odor removal (bio-filters)
Process control pile oxygen levels
Images: http://organic.tfrec.wsu.edu/compost/ImagesWeb/CompEquip.html (left image)
8/8/2019 Aerobic Composting Technologies
5/11
In-Vessel System: Enclosed Aerated Static
Pile - Gore Cover Systems
Images: http://www.gore.com/en_xx/products/fabrics/swt/gore_cover_composting_biological_yardwaste.html
In-Vessel System: Enclosed Aerated Static
Pile - NaturTech
8/8/2019 Aerobic Composting Technologies
6/11
In-Vessel System: Agitated Bed IPS (Siemens)
Images: http://www.water.siemens.com/SiteCollectionDocuments/Product_Lines/Microfloc_Products/Brochures/IPS-GEN-BR-0108.pdf
In-Vessel System: Rotating Drums
Andar Environmental
Images: http://www.andar.co.nz/Products/Environmental/Rotocom/system.asp
8/8/2019 Aerobic Composting Technologies
7/11
Using earthworms to breakdown organic matter
into natural fertilizer/soil conditioner
Vermicomposting
Images: http://www.kvafsu.kar.nic.in/Deoni%20Farm.htm, http://www.wormwoman.com/acatalog/2004-fall-tour/2004-fall-tour-08.html,http://torontoist.com/2007/07/square_feet_ver.php
Case Study: ECARU Facility
Cairo, Egypt
Existing composting operation: 375 tpd
- ERPA expansion: 1,100 tpd
Process: waste sorting / windrow
Climatic condition: tropical / dry
8/8/2019 Aerobic Composting Technologies
8/11
Case Study: ECARU Facility
Cairo, Egypt - Sorting
Case Study: ECARU Facility
Cairo, Egypt - Sorting Schematic
8/8/2019 Aerobic Composting Technologies
9/11
Case Study: ECARU Facility
Cairo, Egypt - Composting
Case Study: Smart Facility
Kota Kinabalu, Malaysia
ERPA: 500 tpd (waste), 300 tpd organics
Process: waste sorting / windrow
Climatic condition: tropical / wet (about 3 m/yr)
Front-end sorting similar to Cairo
8/8/2019 Aerobic Composting Technologies
10/11
Case Study: Smart Facility
Kota Kinabalu, Malaysia - Composting
High precipitation tarps over windrows to
minimzes leachate
Care in est. composting area 4 acres (original),
re-clculated to 15 acres
Case Study: Tashkent, Uzbekistan
Projected throughput: 400 tpd to start
Simple compost wastepicking , but no sorting
Proposal aerobic landfill, only income carbon
revenue low cost operation
Market landfill cover
Project failed climate: temperate / dry, low
emission factors
8/8/2019 Aerobic Composting Technologies
11/11