integrated waste management using biogas technology *south ... seminar on... · integrated waste...
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WMRIG Seminar on Organic Waste
Integrated Waste Management using
Biogas Technology
*South African Context*
Hillcrest Estate, 17 May 2012
Alastair Gets
AGAMA Energy
Municipal solid waste
1,600kt/a (4,400t/d) @ an expense of R5.5bn/a
Running out of landfill air space…..
12,000 t CO2 every day!
Sewage waste
CCT treats 560 million litres of sewage each day
550 t of CO2 every day!
Biogas Yields
AGAMA’s BiogasPro
Engineered
for
Performance
Pre-fabricated digester, 65
in-factory quality checks
Installed in a few days
BiogasPro
ENGINEERED
PATENTED
CERTIFIED
APPROVED
• BiogasPro o Installed sub-surface o 2.2m diam, 2.4m high o No mechanical or
chemical inputs o 2 m3 biogas per day
(5 hours cooking)
• SmartTop o Retains the ‘brains’
o Tank constructed in situ
o Performance identical to BiogasPro
www.biogaspro.com
Small Distributed
Digesters
South African Market
o Rural SA: 300,000+ homes
o Schools: 30,000
o Eco-lodges, new housing
BiogasPro in the home
Schools – Three Crowns
Biogas in SA Prisons
• 1.Feasibility Study: Pre-feasibility & mini-pilot (GCC)
Bankable Feasibility
• 2.Demonstration Plant
• 3.National roll-out
• Other DPW facilities (schools,
defence, etc), Africa…
Technology
Kitchen organic waste
Macerator
Feed hopper
Silage
Grass cuttings
Screw feed
WWTP (bioreactor)
Prison Sewage
Pasteuriser
Biogas Boiler & Solar Collector
Purify & Scrub
Effluent
Biogas
Prison Boiler
Blower
Heat
665m3/d
CCT Sewer Main
1.1t/d
0.2t/d
6MJ/d (winter)
0.7GJ/d (winter)
7m3/h
0.7GJ/d (solar supported)
3.4GJ/d (winter)
Flare
8m3/d
emergency
Digester
WWTP(balancing tank)
1t/d (sludge)
solids
Screen
8t/d (liquid)
1.3t/d 37oC
70oC for 1h/d
Output: water and
energy
Input: sewage and
organic waste
Communities - Cato
Manor • Type
Hydraulic fixed slab digester
with aquaculture
280 m3 digester
R1.2 million
Cato Manor (cont.)
• Feedstock
Sewage
(70 m3/day),
OFMSW &
Chicken litter
(~3t/day max)
Petro SA
• Type:
Refinery process waste
gas running gas engine
electricity generators
• Large:
34 GWh/a elec
(3 x 1.4 MWe)
City of Cape Town
• 2008 UNDP Athlone organic waste study
• 2011 Section 78(3) study – Alternative
Service Delivery (waste management)
• 2012 KfW funded feasibility (in progress):
Windrow composting
In-Vessel composting
Anaerobic Digestion
Biological Drying
Thanks for your attention!
Alastair Gets
alastair.gets@agama.co.za
www.agama.co.za
021-7013364
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