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