BIOGAS NORD

BiNoLiquiFeed

Contents

The Biogas Process

BiNoLiquiFeed Hydrolysis Technology

Reference Biogas Plants

The four stages of the biogas process

1. Hydrolysis – polymers found in the biomass, such as carbohydrates, fats and protiens, are broken down into their constituent parts (monomers) such as sugars, fatty acids and amino acids.

2. Acidogenesis – the remaining components are broken down further with the help of acidogenic bacteria to create volatile fatty acids, alcohols and ammonium sulphide.

3. Acetogenesis - simple molecules created through the acidogenesis phase are further digested by acetogens to produce acetic acid, as well as carbon dioxide and hydrogen.

4. Methanogenesis - methanogens use the intermediate products of the preceding stagescomponents and convert them into methane, carbon dioxide, and water. These make up the majority of the biogas emitted from the system. Methanogenesis is sensitive to both high and low pHs and occurs between pH 6.5 and pH 8.

Carbohydrates

Fats

Proteins

Sugars

Fatty acids

Amino acids

Organic acids

Alcohols

Ammonium

Sulphide

Acetic acid

Acetate

Hydrogen

Carbon dioxide

BiNo-Liquifeed

Digester

Biogas (ca. 60 % Methane + 40 % Carbon dioxid)

Biofilter

The BiNoLiquifeed technology enables a speeding up of the biogas process. At lower temperatures, witha pH of less than 6, and under alternating aerobic and anaerobic conditions, complex molecules are quickly broken down into acetic acids. Once the substrates have been transferred into the digester, the methanogenic bacteria have immediate access to these broken down materials, meanting that the methogenesis process is more effective.

Retention time

• Without the BiNoLiquifeed technology, the retention time is usually between 40 and 100 days, depending on the nature of the substrates.

• Using the BiNoLiquifeed technology, the retention time is reduced to less than 30 days.

The benefits of a shorter retention time

• Increased biogas production when using the same digester volume.

• The same volume of biogas with a reduced digester volume.

BiNoLiquiFeed: Hydrolysis technology

Advantages of BiNoLiquiFeed

Increased efficiency

• Fibrous materials such as grass, straw and hay can be easily digested.

• Reduced energy consumption from agitation, pumping and feeding.

• Reduced retention times.

• Increased loading rates.

Process stability

• The technology can handle frequent changes in types and qualities of substrates.

• Reduced risk of floating layers.

Covered, gas-tight concrete tank

All components are resistant against corrosion

The concrete is protected from corrosion by foil, coatings and chemical treatment

Air Hydrolysat

Input liquids

Input solids

BiNoLiquiFeed: Technology overview

Reference plant Worpswede, Germany

• Hydrolysis unit commissioned in 2011• Substrates:

– Maize silage– Grass silage– Rye

• Electrical Power: 1 MW• Volume of hydrolysis unit: 318 m³

Gas yield analysis, Worpswede

January

10

Febru

ary 10

March 10

April 10

Mai 10

June 10

July 10

August

10

Septem

ber 10

October

10

November

10

December

10

January

11

Febru

ary 11

March 11

Apr 11

Mai 11

June 11

July 11

Aug 11

Sep 11

October

11

Nov 11

December

110

5

10

15

20

25

30

14.9

2

13.5

2

10.3

0

5.19

4.59

8.22 11

.06

11.2

2

8.79 10

.55

3.74

14.8

9

8.56

18.9

0

18.0

8

19.2

6

19.6

3

22.4

8

21.7

5

20.9

8

22.6

2

23.6

5

25.7

7

25.7

2

[ % ]

Bino Liquifeed

ComissioningThe diagram shows the gas production [kWh ] for the combined substrate [ t ] over the theoretical gas production. In 2010 the plant produced 9 % more biogas than the theoretical production. This increased level of gas production is due to the inclusion of rye as a feedstock. In January 2011 the Bino Liquifeed was commissioned. As the diagram clearly shows, the gas production per tonne of fresh matter increased to approximately 25 % above the theoretical production following the commissioning.

Electrical consumption analysis, Worpswede

January

10

Febru

ary 10

March 10

April 10

Mai 10

June 10

July 10

August

10

Septem

ber 10

October

10

November

10

December

10

January

11

Febru

ary 11

March 11

Apr 11

Mai 11

June 11

July 11

Aug 11

Sep 11

October

11

Nov 11

December

114

4.5

5

5.5

6

6.5

7

7.5

[ % ]

BinoLiquifeed

Reference plant Rödinghausen, Germany

• Hydrolysis unit commissioned in 2011• Substrates:

– Maize silage– Whole crop silage– Solid cattle manure– Liquid cattle manure

• Electrical Power: 2x 250 kW• Volume of hydrolysis unit: 192 m³

Reference plant, Latvia

• Hydrolysis unit commissioned in 2011• Substrates:

– Maize silage– Solid cattle manure– Liquid cattle manure

• Electrical Power: 1 MW• Volume of hydrolysis unit: 318 m³

Thank you for your attention !