bio waste treatment using dry anaerobic digestion...

CTU Clean Technology Universe AG

Your Partner for responsible waste treatment

Bio Waste Treatment using

Dry Anaerobic Digestion Technology

CTU Clean Technology Universe AG - Your Partner for responsible waste treatment

Contents

Waste Characteristics

Bio degradable materials

Process

Mass and Energy Balance (typical)

Use of Products

References

Conclusions

September 2013


Typical MSW composition Switzerland (acc. to BAFU 2002)

minerals 5.5%

wood 2%

degradablewaste27%

textiles 3%

plastic

Containers/bottles 2%Other plastics

12.5%

packagingmaterials

4%electronic

scrap 0.6%

batteries0.07%

composites13.5%

Hazardous waste0.2%

2%

ferrous 1.5%

non ferrous 1%

Glass 4%

paper 12%

cardboard 4%reusable paper

September 2013


Contents



Process


Use of Products

References

Conclusions

September 2013


What is degradable waste?

September 2013

Waste from food industry

Kitchen waste

Waste from vegetable/fruit markets

Waste from agriculture

Waste fromgardens/parks


Typical wastes and their gas production

WASTE TYPE

� Grass cuttings, leafs � Flowers� Waste from vegetable and fruit markets � Food industry: Vegetables and fruit processing incl. pomace

(wine) and residues from juice production� Residues from coffee roasting� Residues from breweries� Residues from bakeries� Residues from tobacco processing� Bio waste from households� Residues from restaurants, cantinas etc. � Residues from agriculture, cattle/hog/chicken farming� Used vegetable oils (frying oil)

Gas production

+++++++

++++++++++++++++++++++

September 2013


Contents



Process


Use of Products

References

Conclusions

September 2013


The closed cycle of anaerobic dry digestion

September 2013


Composting (aerob digestion)

• Part of the bio waste is not degradable under anaerobic conditions

• Hence the residue from anaerobic digestion (digestate) will be digested aerobically (composting)

• In order to compost, the digestate solids must be dehydrated.

• Compost and water from dehydration are used as organic fertilizers of high quality

September 2013


Contents



Process


Use of Products

References

Conclusions

September 2013


Mass flow of separately collected bio waste (typical)

Pre-screening

digestion

Dehydration

41%

14%

Input

Aerobic processing

2% to 5%

Bio waste

Liquidfertilizer

Compost Biogas

Plastic/steel etc.

Aerobic loss

15%

100%

28%

Anaerobic processing

September 2013


Energy Balance for 20‘000tpd of bio waste with Electrical Energy Production (based on high performance engine)

2.3 Mill. m3 of bio gas13 Mill. kWhth per year

100%

Losses

8%Useful energy 91%(11.83 Mill. kWhth per year

Internal heatconsumption

Sellableheat6 Mio kWh/y

Sellablepower4.68 Mio kWh/y

Internal power consumption

46% 36% 4%

6%

Gas engine

September 2013


Energy Balance for 20‘000tpd of bio waste withSynthetic natural gas production

Losses

Internal heatconsumption

Sellable Synthetic NG12.2 Mio kWh/y

equivalent to 13.000.000 liter of gasoline

Internal el. power consumption

94% 6%

8%5%

2.3 Mill. m3 of bio gas13 Mill. kWhth per year

100%

External heat External el. power

September 2013


Contents



Process


Use of Products

References

Conclusions

September 2013


Suitable for organic production!

Compost and liquid fertilizer use

Fertilizers fulfil most stringent hygiene requirements!

Anaerobic digestion leads to highly nutrient organic fertilizers.Nutrients are recycled!

Applications:• park maintenance• organic vegetable production• organic grains production

compost

Liquid fertilizer

September 2013


Biogas use

High energy sales possible

CTU offers different upgrading processes dependent on plant size

Production of heat and power using high efficiency gas engines.

Synthetic natural gas for mobility use Combined heat and power production (CHP)

September 2013


Emission reduction by use of synthetic natural gas (SNG)

CO

- 50%

NOX

- 80%

SO2 Particlessoot-

> - 95%

HC

- 80%

CO2

- 100%

Emissions reduction due to SNG

SNG

0.02 g/km

dieselgasoline

Ozone formation potential

1.56 g/km

0.54 g/km

September 2013


Contents



Process


Use of Products

References

Conclusions

September 2013


Concrete Digester (2x20000tons per year) construction

September 2013


Lavigny (Switzerland) 15‘000 tpy (Commissioning 2008)

September 2013


VAR (The Netherlands): 60‘000 tpa (Commissioning 2008/2009)

September 2013

CTU Clean Technology Universe AG - Your Partner for responsible waste treatmentSeptember 2013

Contents



Process


Use of Products

References

Conclusions


Strong holds of CTU / KOMPOGAS dry digestion

safe and ecological treatment of biogene wastes

nearly all biogene wastes can be treated

flexible waste composition possible

flexibility of entire plant concept regarding products

fully hygienized products

Steady and high biogas production


Strong holds of CTU / KOMPOGAS dry digestion

modular construction allows any throughput

high loading rate (low volume)

Minimum water consumtion

very high availability

Many references

Exceptional plant life and plant reliability


Thank you for your attention!

CTU Clean Technology Universe AGBürglistrasse 29CH- 8400 WinterthurTel: +41 52 557 52 52Fax: +41 52 557 52 52 [email protected] - www.ctu.ch

bio waste treatment using dry anaerobic digestion...

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