digesting fibruous materials and waste in ......(than conventional 1-stage ad plants). the slp...

. © www.snow-leopard-projects.com · G.Urban 1

Thailand Eberl Agrar Energie

Snow Leopard Projects GmbH

Marktplatz 23 · 94419 Reisbach

Germany

Experts in Biogas

High Performance Biogas Plants

Especially for fibrous feedstock

DIGESTING FIBRUOUS MATERIALS AND WASTE

IN MULTI STAGE BIOGAS PLANTS


SNOW-LEOPARD-PROJECTS GMBH

IS A BIOGAS PLANT DEVELOPER IN GERMANY,

WHOSE OWNER HAS PIONEERED BIOGAS-PLANT-TECHNOLOGY

SINCE 1995

Dingolfing Landau

Pfarrkirchen

• Decentralised biowaste digestion from

1995 until 2009 for 200.000 people in

the districts Dingolfing-Landau und

Rottal-Inn, Bavaria

• Biogas plants in ownership and

operation

• 2004 – 2007 development of 2-stage

digestion system

• Since 2005 engineering and

construction of biogas plants for

customers


SNOW LEOPARD PROJECTS GMBH (SLP)

• Founded (2011) from Rottaler Modell (since 1994)

• Managing Directors – Katharina Danner and Walter Danner

• Biogas Entrepreneur since 1994

• Spokesman of the Lower Bavarian Regional Group of the German Biogas Association (WD)

• Speaker of the AK Biogas at the German Solar Energy Society (WD)

• Development, planning and construction of 50 biogas plants in 12 countries in Germany, Europe, Africa, Asia and South America

• Consultant for the UN for biogas and „Biomass to Energy“ (WD)

• Biogas Management School


AWARDS (EXAMPLES)

EXPO 2000 Project

Innovation Prize Inn-Salzach-Euregio 2000

Bavarian Environment Prize 2000

Bavarian Export Prize 2014

...


BIOGAS PLANTS

Snow Leopard Projects (SLP) directors have

developed a unique 2-stage ad plant which

is consistently up to 30 % more efficient than

conventional 1-stage digestion plants (ad plants).

This plants can operate with over 75 different

types of feedstock. The design of a SLP 2-stage

ad plant with 2 hydrolysis tanks, enables

the plant to process up to 80 %. straw based

manure feedstock. This is an exceptionally

high percentage of the overall feedstock

when compared to typical 1-stage ad plants,

that mostly require a very homogeneous

feedstock of energy maize or grass silage.

therefore these biogas plants can digest

waste with is allready locally available.


INDUSTRIAL 2-STAGE AD BIOGAS PLANT

(0,5 – 2 MWe), Germany

These spezial 2-Stage AD plants are designed

to provide a very stable and robust operating

process for biogas production resulting in

feedstock retention time of just 3 weeks,

fewer interruptions and delays. In an average

year the SLP 2-Stage AD plants currently in

operation are performing between 90-98 %

full load hours.

Hydrolosys Tank 1 Tank 2 Pump

Room

Control Office

Digester Tank

Storage Tank

(Size according to EU

Environmental Law)

CHP Engine

MINI BIOGAS PLANT

(10 – 25 KWe)


80 %

SLP HIGH PERFORMANCE BIOGAS PLANT

2-STAGE AD SYSTEM

WITH SEPARATE HYDROLYSIS AND ACIDIFICATION

• Separate hydrolysis system with Batch Feeding

• > 30% higher biogas yield in comparison to the German KTBL standard 2004

• Digestion of fibrous material (grass, straw, manure, etc.) – maize stalks, vinasse,

rice straw, sugar cane tops is a potential feedstock

• Digestion of energy rich material (slaughterhouse waste, fruit processing waste,

olive pomace, and much others)

• Easier and simpler operation due to 2-stage biological process

• > 97% full load performance

• Industrial equipment

• Own key equipment – controlling system, high density agitator, pump station


BIOLOGICAL PROCESSES IN A 2-STAGE AD BIOGAS PLANT

Hydrolysis and acidification occur in the hydrolysis

tanks and acetification and methanisation occur in

the digester tank. By perfecting the biochemical

processes of producing biogas into 2 separate

stages, this 2-Stage AD plant will extract 99.5 %

of the biogas potential in a given tonne of feedstock.

Feedstock

EXAMPLES Chicken Litter Duck Manure Gras/Maize Silage Straw Food Waste Slaughterhouse Waste Pome and EFBs and much more ...

Lipids, Proteins, Carbohydrates

Hydrolosys Acetification Acidification

COMPOSITION Fatty Acids, Amino Acids, Alcohols

PROCESS Thermophilic 50°C – 55°C

PH VALUE Acidic 4,5 – 7pH

COMPOSITION Volutile Fatty Acids, Alcohols

PROCESS Thermophilic 50°C – 55°C

PH VALUE Acidic 4,5 – 7pH

COMPOSITION Acedic Acids, Carbon Dioxide, Hydrogen

PROCESS Mesophilic 41°C – 44°C

PH VALUE Neutral 7 – 8pH

Menthanisation

COMPOSITION Methane (55%), Carbon Dioxide (45%)

PROCESS Mesophilic 41°C – 44°C

PH VALUE Neutral 7 – 8pH

Biogas

The biochemical processes are deliberately

separated in a Snow Leopard 2-stage ad plant

in order to optimise the biogas extracted

(other than in a typical 1-stage plant

where all processes have to be done in one

tank and are not so high efficient).

1 2 3 4


BIOMASS RECOVERY FROM WASTE

WHAT TO DO AFTER COLLECTING?

Cattle Manure & Slurry

Duck Manure

Straw

Pig Manure & Slurry

Chicken Litter

Landscaping Material

Pome and even Emty Fruit Bunches

Rice Husk And Straw

Food Waste

Slaughterhouse Waste

... And Much More

Dumping

Composting

Digesting

in SLP Biogas

Plants

Nothing

(but Polution)

Fertilizer

Fertilizer

Gas

Elecricity

Heat

Brickets


FEEDSTOCK EXAMPLE LIST

We have experience with the following feedstock in own biogas plants:

Energy Crops Agricultural Waste Industrial Biowaste Other Biowaste

Maize, -silage Liquid cattle manure Overload food - beer Waste derived from

Sudan grass Liquid pig manure - bread kitchens and restaurants

Corn cob mix Duck manure - candy bars

Grass Layer manure - vegetable MSW organic fraction

Clover grass Broiler chicken manure - fruit

Rye Grain products Meat bonemeal

Sugar beet Horse manure Blood (slaughterhouse waste)

Wheat Straw Cadaver meal

Potato Olive waste (pomace) Fruit waste (rasberry)

Vinasse China cabbage

Sugar cane tops Whey

Maize stalks Ice cream

Milk waste


DIFFERENT FEEDSTOCKS AND THEIR SUITABILITY FOR

SINGLE STAGE OR TWO STAGE AD TECHNOLOGY

• 2-stage Biology Covers a wider

range of Biomass as Feedstock

• Especially Highly Fibrous Biomass

and very Energy Rich Biomass


80 %

BIOGAS PROJECTS (SELECTION)

IN TOTAL >40 PROJECTS FROM 10 KWEL TO 4 MWEL

SCOPE OF SUPPLY IN RANGE FROM ENGINEERING TO TURN KEY

High Performance Biogas Plant

Simbach b.Landau

500 kWel

Start up: 2006


City of Baden Baden

500 kWel

Start up: 2009


Chile

4x1MWel

Start up: 1MW June 2011 High Performance Biogas Plant

Ortner

250 kWel

Start up: 2010


Energiehof Bieswang GmbH &

Co.KG

600 kWel

Start up: 2011

HPTC Biogas Plant

Dadaab, Kenia

10 kWel

Start up: February 2011


80 %

BIOGAS PROJECTS (SELECTION)

IN TOTAL >40 PROJECTS FROM 10 KWEL TO 4 MWEL

SCOPE OF SUPPLY IN RANGE FROM ENGINEERING TO TURN KEY

George Fram Biogas Plant. Kenya


EXAMPLE: HORSE MANURE (STRAW)

DIGESTION AND UTILIZATION

• Horse manure and straw is difficult to digest due to the high fibre content.

• With the SLP 2-stage digestion the final digestate is after separation and drying a

good biofuel in biomass boilers. Natural gas, heavy furnace oil and wood chips can be replaced.

• Very low clinker fall out due to low mineral content in the biofuel after leaching out of minerals in the hydrolysis tank.

• Regular boiler technology is suitable for the biofuel from the SLP AD plant


DIGESTION OF HIGHLY FIBROUS MATERIAL HORSE MANURE – WITH HIGH STRAW CONTENT

©

80% horse manure in the feeding ratio

Maize straw and rice straw

is a potential feedstock



There is no silo maize!

BIOENERGIE LICHTENECK GMBH & CO. KG HORSE MANURE DIGESTION


EXAMPLE: HPTC BIOGAS PLANT

CONTAINERIZED FOR OFF GRID APPLICATIONS (HPTC = HIGH PERFORMANCE TEMPERATURE CONTROLLED)

Biogas plants for rural areas in developing and emerging countries

• for the digestion of waste from markets and production

• Slaughterhouse waste

• for the production of cooking gas, electricity and productive heat

• With temperature control like big biogas plants for high biogas production


MINI BIOGAS PLANT (10 – 25 KWe)

Same Biological Processes

- Highly Efficient

- Flexible Local Feedstock

- Easy To Set Up

- Replacement Of Diesel For Generators

- Contribution To Own Energy Consumption

- Reducing Local Costs

- ...

Cattle Manure

Gras (Fresh Or Dry)

Market Waste

Vegetable Waste

Fish Processing Waste

Oil Seed Waste

Organic Municipal Waste

.....

Example:

Food Waste (Kitchen) 300 Kg/Day= 10 Kw

Food Waste (Kitchen) 1000 Kg/Day= 25kw

GAS

ELECTRICITY

FERTILISER

(CARBON CREDITS)


REAL LIVE EXAMPLE: FERTILIZER QUALITY

Banana plants at the WEMA centre, Mombasa (May 2008)

All the bananas were planted on the same day:

the small ones had no MBPP fertilizer (discharge effluent = organic fertilizer)

the big was irrigated with MBPP fertilizer (see the person as reference)

Without fertilizer With fertilizer


WHY CHOOSE A 2-STAGE AD PLANT?

Reduction of dumping costs and pollution.

Easy access for maintenance.

Feedstock can be changed daily if needed.

Total retention time is only 3 weeks.

The plant is small in size and needs less space.

Consistently up to 30% more efficient

(than conventional 1-Stage AD plants).

The SLP 2-Stage AD Plant produces up to

30% more biogas than 1-stage AD plants.

Feedstock can be up to 80% straw based manure

(cattle manure, pig manure, horse manure

or other fibrous materials).

Cheaper agricultural feedstock or allready

existing waste materials can be used

(manure, slurry, chicken litter, spent mushroom

compost, waste vegetables, fallow year rotation

crop, maize straw, rape seed straw, grass from

river flooding areas, slaughterhouse waste,

Pome an EFB, etc.), rather than having to provide

high quantities of energy maize (as often required

by 1-Stage plants)


WHY CHOOSE A 2-STAGE AD PLANT?

Serving the environmental regulations and needs Extending the vaue chain

with the differnet outputs

you get:

Gas (for further use)

Electrical Power

Heat (and Cooling)

Liquid Fertilizer

Solid Fertilizer,

Bio Fuel (eg. Pelletts)

Jobs


CONCLUSION

OUR TYPES OF

2-STAGE AD-BIOGAS

PLANTS ARE

MORE EFFICIENT,

SMALLER AND

HIGHLY FLEXIBLE

UNIQUE IN DIGESTING WASTE AND FIBROUS MATERIALS!


CONTACT


Gregor Urban

Marktplatz 23

94419 Reisbach

Phone: +49-(0)8734-93977-0

Fax: +49-(0)8734-93977-20

Mail: [email protected]


SLP 2-STAGE AD PLANT VS. TYPICAL 1-STAGE AD PLANT

Feeder

Typical 1-Stage AD plant SLP 2-Stage AD plant

Feeder

Storage Tank

Digester Tank

Digester Tank

Storage Tank

Hydrolosys

Tank1

Hydrolosys

Tank2

LAYOUT




FEEDING

Digester is fed

during the whole

day every 30

minutes or every

hour

Continuous

Feeding

Hydrolysis Tank is

fed once a day or

once every 2 days

Batch

Feeding

Feedstock can only be

changed over 4-6 weeks

with up to 10% of the

feedstock changed over

the course of a day.

CHANGING FEEDSTOCK


4 – 6

Weeks

Feedstock can be

changed daily if

required. Daily




BIOLOGICAL PROCESS

Mesophilic ambient temperatures in a typical

1-Stage AD plant range from 30 - 38°C.

TEMPERATURE

Digester Tank

30 – 38°C

Mesophilic

A SLP 2-Stage AD plant separates the temperature for

hydrolysis in the hydrolysis tanks and methane production in

the digester tank.

Hydrolysis Tank 1

50 – 55°C

Thermophilic

Hydrolysis Tank 2

50 – 55°C

Thermophilic

Digester Tank

41 – 44°C

Mesophilic

All 4 biochemical processes happen in the

digester tank. Usually mesophilic (30-38°C).

Digester Tank

Hydrolysis

Acidification

Acedification

Methanisation

The biochemical processes are separated into 2 steps.

Hydrolysis tanks (50-55°C) and digester tank (41-44°C).

Hydrolysis Tank 1

Hydrolysis

Acidification

Hydrolysis Tank 2

Hydrolysis

Acidification

Digester Tank

Acetification

Methanisation




PH VALUE

Retention time in a typical 1-Stage AD plant

is considerably longer than an SLP 2-Stage

AD plant at between 60 and 120 days

RETENTION TIME

Digester Tank

60 – 120

Days

Retention periods for 2-Stage plants being 2-4 days for the

hydrolysis tanks and 10-15 days for the digester tank.

Hydrolysis Tank 1

2 – 4

Days

Hydrolysis Tank 2

2 – 4

Days

Digester Tank

10 – 15

Days

Both digester tank and storage tank have a

neutral pH value of between 7-8pH.

Digester Tank

7 – 8 pH

(Neutral)

The hydrolysis tank has an acidic pH value of 4.5-7pH. The

digester tank is neutral at 7-8pH and storage tank is neutral

at 7-8pH.

Hydrolysis Tank 1

4,5 – 7 pH

(Acidic)

Hydrolysis Tank 2

4,5 – 7 pH

(Acidic)

Digester Tank

7 – 8 pH

(Neutral)

digesting fibruous materials and waste in ......(than conventional 1-stage ad plants). the slp...

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