- Email: [email protected]
Waste treatment: Anaerobic digestion handles multiple waste streams
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Application Filtration+Separation May/June 2013
Waste treatment:
Anaerobic digestion handles multiple waste streams B
CI Process is designing, fabricating and installing the mechanical services required for an anaerobic digestion plant. The initial concept for the project was arranged by PROjEN on behalf of A C Shropshire Ltd, a family owned farming business in Leicestershire, United Kingdom.
The issue of using waste products for power generation is being actively encouraged in order to reduce the amount of waste sent to landfill. Consequently, the number of anaerobic digestion plants and companies involved in their construction is growing rapidly. A C Shropshire Ltd. farms 320 hectares and is involved with arable, beef and pig production, as well as with a long-established waste food processing business. As such the business was ideally suited to the installation of an anaerobic digestion (AD) plant, being able to combine both farm and food waste for the digester, and allow it to produce electricity and bio-fertiliser. The pig unit on the farm produces 18,000 tonnes of liquid manure each year, with other farming operations producing 2,000 tonnes of manure. Previously this was stored in large tanks on site before being applied to the arable land belonging to the holding or on neighbouring farms. This process could generate a nuisance odour during the spreading, however, with the manure being processed through the AD plant, this odour is greatly reduced. PROjEN PLC, a specialist engineering management company, prepared the initial process design concept for AC Shropshire Ltd. This concept was used by BCI Process and developed into a full 3D design for the pipework services and support structures. All the pipework services were constructed from light gauge metric stainless steel to ensure
the new installation would provide long lasting service. In addition to the pipework and support structures, BCI also supplied and installed the valves as well as the pipe insulation, used to protect against freezing. The plant will process all 20,000 tonnes of manure generated by the various farming operations on the site and will be blended with around 25,500 tonnes of human food by-products. The different elements of the wastes will be mixed before passing through three 5,000m3 fermenting tanks at a rate of 100-120 tonnes per day in a continuous process lasting over thirty days.
up to six months prior to spreading on the land as organic fertiliser rather than pig slurry. Overall, the process will produce 2 MW of electricity and around 43,000 tonnes of liquid organic fertiliser.
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Contact: E-mail: [email protected] www.bciprocess.com
The gas produced is cleaned and supplied to a combined heat and power system (CHP) to produce heat and power for the farm and other operations as well as power to be supplied to the Grid. The liquid residue from this process is stored in two other tanks for
Figure 1: The number of anaerobic digestion plants is growing.
Figure 2: The plant will process all 20,000 tonnes of manure generated by the various farming operations.
Application Filtration+Separation May/June 2013
Waste treatment:
Anaerobic digestion handles multiple waste streams B
CI Process is designing, fabricating and installing the mechanical services required for an anaerobic digestion plant. The initial concept for the project was arranged by PROjEN on behalf of A C Shropshire Ltd, a family owned farming business in Leicestershire, United Kingdom.
The issue of using waste products for power generation is being actively encouraged in order to reduce the amount of waste sent to landfill. Consequently, the number of anaerobic digestion plants and companies involved in their construction is growing rapidly. A C Shropshire Ltd. farms 320 hectares and is involved with arable, beef and pig production, as well as with a long-established waste food processing business. As such the business was ideally suited to the installation of an anaerobic digestion (AD) plant, being able to combine both farm and food waste for the digester, and allow it to produce electricity and bio-fertiliser. The pig unit on the farm produces 18,000 tonnes of liquid manure each year, with other farming operations producing 2,000 tonnes of manure. Previously this was stored in large tanks on site before being applied to the arable land belonging to the holding or on neighbouring farms. This process could generate a nuisance odour during the spreading, however, with the manure being processed through the AD plant, this odour is greatly reduced. PROjEN PLC, a specialist engineering management company, prepared the initial process design concept for AC Shropshire Ltd. This concept was used by BCI Process and developed into a full 3D design for the pipework services and support structures. All the pipework services were constructed from light gauge metric stainless steel to ensure
the new installation would provide long lasting service. In addition to the pipework and support structures, BCI also supplied and installed the valves as well as the pipe insulation, used to protect against freezing. The plant will process all 20,000 tonnes of manure generated by the various farming operations on the site and will be blended with around 25,500 tonnes of human food by-products. The different elements of the wastes will be mixed before passing through three 5,000m3 fermenting tanks at a rate of 100-120 tonnes per day in a continuous process lasting over thirty days.
up to six months prior to spreading on the land as organic fertiliser rather than pig slurry. Overall, the process will produce 2 MW of electricity and around 43,000 tonnes of liquid organic fertiliser.
•
Contact: E-mail: [email protected] www.bciprocess.com
The gas produced is cleaned and supplied to a combined heat and power system (CHP) to produce heat and power for the farm and other operations as well as power to be supplied to the Grid. The liquid residue from this process is stored in two other tanks for
Figure 1: The number of anaerobic digestion plants is growing.
Figure 2: The plant will process all 20,000 tonnes of manure generated by the various farming operations.