Biological Electricity Production

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Biological electricity production

Group Work:

Aura Salmela

Katharina Rohr

Miriam Rueda-Noriega

Victor ChukwumahSonia Bochon

Sheyla Ortiz-de-Garcia

Summer School Valladolid 2011BIOCEN

Strategies for bio-energy and bio-fuel production Life

cycles, assessment and evaluation

Valladolid, 2 september 2011

Tutor:

Dr. Peter Westermann

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Contents

Introduction

Process of methane production

1. Electromethanogenesis

2. Anaerobic digestor

Comparison with different countries and methods

Advantages and disadvantages

Conclusion



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Introduction

Production ofmethane per

hectare at differentlatitudes

Energy crops(Anaerobic

Reactor)

Solar Energy+ Electrome

thanogenesis

Estimate andcompare the

efficiencyand

perspectives

Goal:



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Methane from Electromethanogenesis

Principle

Anode/Cathode/membranePower (solar panels)

Microorganisms

Efficiency



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Methane from anaerobic digestion

Anaerobic Reactor

Series of processes

MicroorganismsAbsence of Oxigen

Industrial or domestic

proposes

Manage waste &

release energy



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Methane from anaerobic digestion

Carbohydrates

Fats

Proteins

Sugars

Fatty acids

Amino acids

Carbonic acidsand alcohols

Hydrogen

Carbon dioxide

Ammonia

Hydrogen

Acetic Acid

Carbon dioxide

Methane

Carbon Dioxide

Hydrolisis Acetogenesis MethanogenesisAcidogenesis



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Methane production from crops

SPAIN FINLAND GERMANY POLAND DENMARK

Type of productionSugar

beet

Reed canary

grass Corn

Sugar

beet

Wheat

straw

Mass (tonnes/ha/year) 69,83 7 50 8 10

Biogas(m3/kgSV) 0,5 - - - 0,250

Composition methane(%) 68,0 - 53 theorical 61,6

Methane (m3/ha/year) 16619,54 3000 4902,5 8000 4000

Methane (tonne/ha/year) 11,30 2,16 3,5 5,4 2,72

Sugar beet Reed canary

grassCorn Wheat straw



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Methane production from microbial cells

Spain= 4Kwh/m2day

Germany= 2.68Kwh/m2day

Poland= 2.88Kwh/m2day

Finland= 2.68Kwh/m2day

Denmark= 2.9Kwh/m2day



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SPAIN FINLAND GERMANY POLAND DENMARK

Energy (KhW/m2day) 4 2.68 2.68 2.88 2.9

Useful energy(KW/haday)8000 5360 5360 5760 5800

Necessary Energy /Methane (Kwh/molday)

0.22 0.22 0.22 0.22 0.22Methane (kmol/ha/year)

13077 8762 8762 9416 9481

Methane(tonnes/ha/year)209 140 140 151 152

Methane production from microbial cells

E=Q x V E: Electrical energy(Joules)Q: Quantity of electricity(Coulombs)

V: Voltage (Volts)

Efficiency solar panel=20%

Slope = 8.33 mol e-/ mol methane (1V)



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Results

0

500

1000

1500

2000

2500

3000

3500

SPAIN GERMANY POLAND DENMARK FINLAND

electromethanogenesis

0,00

2,00

4,00

6,00

8,00

10,00

12,00


digestor

Methane(ton

nes/ha/year)

DigestorMicrobial cell


G t d b F it PDF C t F it S ft


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Results

0,00

50,00

100,00

150,00

200,00

250,00


Methane(tonnes/ha/year)

DigestorMicrobial cell


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Advantages / Disadvantages

Solar Energy and vs. Energy Crops

Electromethanogenesis (anaerobic Reactor)




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Solar Energy and Electromethanogenesis:

Advantages:

carbon dioxide neutral

good storage and transport

usable for several applications

Disadvantages:

the amount of methane is minor (practice)




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Energy Crops (anaerobic Reactor):

Advantages:usable for several applications

technology has considerably improved

environmentally friendly way to use waste

better for the climate

Disadvantages:

high cost for the digesters

high cost for the transportation of biomass

corrosive impurities



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