Biogas from Waste - Clarke Energy
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Biogas from Waste
Biogas Biogas from Waste Benefits of Waste Biogas Plants
from Waste Disposal and treatment of biological
waste represent a major challenge
for the waste industry. For a wide
—
—
—
Production of renewable power
Treatment of a waste material
Reduced carbon emissions
range of organic substances from — Economical embedded power
Clarke Energy is the authorised distributor and service agriculture, foodstuff of feed production and reduced
partner for GE Energy’s gas engine division in a growing industries, anaerobic digestion is a transmission losses
number of countries across the world. In addition to superior alternative to composting. — Production of soil improver
Biogas – a mixture of both methane — Cost effective proven technology
providing high-efficiency, reliable gas engines we combine
and carbon dioxide – is created
this with the expertise and resources to deliver unbeatable during anaerobic digestion and
product support. serves as a high-energy renewable Waste Feedstocks
fuel that can be used as a substitute
Whether your requirement is for the supply of a single gas for fossil fuels. Biogas-fuelled gas
engine generator or a complete turnkey power generation engines improve waste A variety of biodegradable waste
management while maximising the feedstocks can be used in digestion
facility, we can meet that need. Our ability to add value by use of an economical energy supply. facilities. At the outset the developer
offering an end-to-end service, from initial proposal to should consider what contaminants
reliable long-term maintenance, has led to us becoming a might be in this waste and how
multi-national company with operations in ten countries Biogas Creation could it affect the digestion process
across the globe. Our company prides itself on integrity, or the operation of the gas engines.
delivering only the highest quality products whilst providing
Biogas results from anaerobic Waste-based facilities range from
a reliable accountable localised service. fermentation of organic materials. simple systems for the digestion of
As a metabolic product of the contaminant free by products, such
Benefits of working with Clarke Energy participating methanogens and as those in the food preparation
Clarke Energy provides flexible solutions for your gas acidogenic bacteria, the industry, up to mixed waste
generation projects. Our services range from the supply of prerequisites for its production are a digestion facilities such as
lack of oxygen, a pH value from 6.5 mechanical biological treatment
a gas engine generator, through to the complete turnkey
to 7.5 and a constant temperature of (MBT) facilities accepting household
installation of a gas powered generation facility. Clarke Energy 35-45°C (mesophilic) or 45-55°C waste. MBT facilities include
has a dedicated, top-quality team of sales, engineering, (thermophilic). The digestion period comprehensive pretreatment plants
project management, commissioning and maintenance staff or retention period is typically or materials recovery facilties
to meet your needs. We also offer long-term maintenance between 10 and 30 days depending (MRFs) to refine the waste materials
contracts backed up by a strong balance sheet, giving upon the type of digestion employed. prior to digestion.
The anaerobic digestion systems of
peace of mind with respect to the long-term performance
today operate largely within the
of your GE gas generation equipment. mesophilic temperature range.
Biogas from Waste Schematic
Exhaust gas
Biogas
Gasometer Heat
Digester exchanger
Heat
Gas flare consumer
Biomass Electrical
Raw fertiliser for energy
agricultural use
Hygenisation
Primary pit
Conversion Steps from Gas Quality Considerations GE Jenbacher and Biogas Our Competence
Waste to Power
The process of biogas generation is The biogas may contain high levels The broad range of GE Jenbacher Clarke Energy has extensive
divided into four steps: of water (humidity) and sulphur, biogas engines is specifically experience in the engineering,
depending upon the feedstock of designed to run at full load with high installation and maintenance of
1. Preparation of the input waste the digester. Developers of biogas efficiency and high availability, generation facilities operating on
material – including removal of plants should consider the potential despite a low heating value and gas derived from biological sources.
physical contaminants, particle for gas contamination when fluctuating gas quality and pressure.
size reduction & pasteurisation designing their facility. The high quality and specially The GE Jenbacher gas engine is
2. Digestion (fermentation), designed engine parts resist the known for having the highest levels
consisting of hydrolysis, Please contact your local Clarke impurities that usually appear in of electrical efficiency on the market.
acetogenesis, acidogenesis and Energy sales office to provide you biogas and similar types of fuel. When coupled with a contractual
methanogenesis with GE Energy’s technical maintenance agreement with Clarke
3. Conversion of the biogas to instruction for fuel gas quality to Before the biogas can be fed into Energy, it will give peace of mind to
renewable electricity and useful understand the required specific the gas engines, it needs to be dried the customer that they will achieve
heat limits. and compressed. Severe the highest levels availability and
4. Post-treatment of the digestate contaminants such as sulphur hence consistent returns from their
Clarke Energy is able to supply fuel should be removed if exceeding a biogas plant.
Initially the feedstock to the gas treatment equipment either free certain level. Not only will these
digesters is received in a primary pit issue, or as part of a turnkey scope measures considerably increase the
or liquid storage tank. From here it is of supply. These typically include availability of the generator, but they
loaded into the digester by various carbon filters, gas dehumidifiers and will also reduce the costs associated
different means depending upon the gas boosters. with operation.
constitution of waste materials.
Please request a fuel gas quality
In the digestion tanks a series of specification to understand
biological processes are harnessed operational limits for gas
in order to produce biogas. contaminants in the generator’s fuel.
Hydrolysis is the process where the
organic material is solubilised into Waste based biogas systems
the digestion liquid. It then typically gain revenue in the form of
undergoes the intermediate steps of gate fees and from the sale of
acidogenesis and acetogenesis renewable electricity and heat. This
which create the precursor means that the gas engine is of
molecules for methanogenesis. particular importance for the
Methanogens feed off these success of the plant. Waste facilities
precursors and produce methane as are typically required to operate at
a cellular waste product. specific times of day and have limits
on the levels of waste that is
The biogas containing this permissible to be stored on site.
biologically-derived methane is These factors make it essential for
contained and captured in a gas the operator to have an engine with
storage tank which is located the maximum levels of availability
separately to the main digester, or (running time per year) and the
alternatively can form its roof. The highest levels of electrical efficiency,
gas storage tank acts as a buffer in in order to convert the gas to the
order to balance fluctuations in the maximum level of electrical output
production of gas in the digesters. and to ensure consistent plant
operation.
PDM Group (Refood) Doncaster, 2 x JGMC420 + waste heat boiler
Biogengreenfinch, Westwood, UK, 2 x JGMC320If you would like to find out
more about how Clarke
Energy can help you
develop your waste sector
biogas project, please
contact your local office for
more details.
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