wastewater treatment plants as resource recovery factories...
TRANSCRIPT
Wastewater treatment plants as
Resource recovery factories -
How relevant is the bioenergy
pathway?
Dr.-Ing. Hans Friedmann www.dr-friedmann.de
2 www.dr-friedmann.de
Dr.-Ing. Hans Friedmann
Over 30 years of biogas experience in research, planning,
consulting, plant construction and plant operation
Owner and Manager of the engineering company „Dr.-Ing
Friedmann – German Biogas Excellence“
Founder member of the German association „Biogasunion e.V.“
and chairman (2000 to 2005)
Member of Presidium and Vice President of the German biogas
association (2005 - 2013)
Member of the guideline committees 4630 and 4631
(Biogas technique) of the Association of German Engineers (VDI)
Founder and CEO of Agraferm Technologies AG (2004 – 2010)
Founder, majority shareholder and managing director of
BKW Biokraftwerke Fürstenwalde GmbH (since 2001)
Operator of 14 biogas plants with 180 kW
up to 5 MW (with BKW GmbH)
Patents to high viscosity mixer, micro nutrients, stillage digestion
process, modular dry fermentation process and more
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Specific experiences
Dissertation „The microbiological methane formation under increased
pressure (mathematic modeling of the biogas process and experimental
verification of the mathematic model)“
Process optimization by use of micro-nutrients in biogas plants
since 1989, patent for use of micro-nutrients, development of
micronutrients
Development of the first high-load plants for the mono-fermentation of
silage (biogas plant free of slurry)
Practical experience with the high-load fermentation of industrial stillage
(e.g. vinasse and stillage of the bioethanol production)
Over ten years of practical experience with the fermentation of
municipal, commercial and industrial wastes
Many years experience with waste from sugar- and palm oil industry
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Biogas Plant
Fermenter Storage tank
for fertilizer CHP-Container
Container for technical
installations, pumps and
Separator
Gas storage Solids input system
Separator
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Substrates and their biogas yield
0 100 200 300 400 500 600
m3 Gas / t Substrate
Animal excreta
Renewable primary products
Renewable primary products
Co-substrate
Co-substrate
Renewable primary products
Co-substrate
Co-substrate
Liquid manure / cows
Liquid manure / pigs
Liquid manue / hens
Whey
Fodder beet
Turnips
Stillage
Sugar beet leaf silage
Grass 1. cut
Green waste
Biowaste
Spent grains ensiled
Maize silage
Grass silage
Maize silage / riped
Scraps of food
Flotation fat
Rape press cake
Waste grease
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Different types of use of biomethane
Power
Heat
Feed-in
CHP
Point of feed-in
Gas treatment equipment
CHP
Fuel
Fuel cell
Natural gas substitute
Biogas
Biomethane
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• Already in the year
2020, 1050 plants
started-up till the year
2000 will fall out of the
EEG funding
• For all further around
8000 German biogas
plants the funding period
ends in each case 20
years after the start-up
The end of the EEG tariff opens enormous processing capacity for
organic material
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Thesis: Organic material, which is separated from wastewater, can be used to
produce biogas in the existing biogas plants.
Sufficient capacities for the processing that organic material exists.
Regional nutrient cycles, especially N and P, can be closed by
agricultural use of the digestion products.
CO2 emissions can be reduced in the wastewater treatment plant as
well as through the use of fertilizers and biogas.
The combination allows decarbonization of the atmosphere.
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Requirements:
We need to change people's thinking and adjust the legal
framework for using this organic material in biogas plants.
and
We have to evaluate how harmful some of the substances in the
wastewater really are in comparison to climate change?
From the technical point of view i can see no problem !
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Reference: biogas plant Fürstenwalde
Our services: conception and planning of the plant (1997), construction supervision (1997), technical optimisation (1998 to 2000), operation by BKW (1998 to 2007)
Plant for waste processing using wet treatment technique
Fermentation of municipal biowaste, food waste, slaughterhouse waste, slurry and supermarket waste
1,34 MW electrical power
Processing of about 40,000 tons of waste per year
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Reference: biogas plant Malchin
Mono-fermentation of corn silage and whole plant silage (without slurry)
5,0 MW el. power, steam and heating network
2 x 2200 cbm fermenter volume
Loading rate up to 18 kg/cbm/d
Plant in industrial area
Our services: conception and planning of the plant (2005), takeover of the operation by BKW (2010 to 2015)
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Reference: biogas plant Ketzin
Gas treatment of 180 cbm bio-methane per hour and 265 kW- dual fuel engine
Current performance 240 cbm
Fermentation of corn silage and grass silage as well as grain
Over 10 kg loading rate
Our services: planning and construction of the plant, operation by BKW 2008 to 2015
Thank you for your
attention.
www.dr-friedmann.de