Bioplex News for 2019
A Change of Diet
After running on farm animal slurry this winter, the digester is now running on a mixture of farm yard manure, old silage and toppings.
The toppings are mainly nettles, thistles and ragwort which are left by the pasture fed cows, cut and collected for the digester. Pasture toppings can give comparable biogas yields to “energy crops”, at a much lower cost.
A complete change of feedstock can be done in a single day, thanks to the hybrid process.
A New Dawn
Studies and development work on a patented hybrid aerobic and anaerobic digester continue.
The aim is to enable family sized farms, communities, colleges etc to be self sufficient in renewable energy, fibre and natural fertiliser from a wider variety of feedstocks than used by conventional digesters. The whole system reduces ammonia emissions and enables carbon capture.
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Bioplex News for 2018
National Energy Efficiency Awards
Bioplex Ltd and Aria Farming win the 2018 National Energy Efficiency Awards, RHI Project.
This follows on from the earlier award for the new hybrid aerobic and anaerobic digester, currently under test, to provide renewable energy and natural slow release fertiliser for a local dairy farm. This will enable it to be "off-grid", closed cycle in nutrients whilst carbon neutral.
Regional Energy Efficiency Awards
Bioplex Ltd and Aria Farming win the South East Region - Small Scale Project of the Year:
A new hybrid aerobic and anaerobic digester to treat slurry and farm yard manure plus weeds, old straw, spoilt silage, grass cuttings and waste vegetation on an organic family dairy farm.
It will provide electricity and heat for a dairy farm, enabling it to go "off-grid" and reducing the quantity of diesel fuel used in slurry spreading by having a much smaller amount of digested solids to spread. The natural fertiliser is stable, with a significant reduction in leaching to watercourses and airborne emissions.
The next stage is to bottle bio-methane (CNG) for use in heating, cooking and vehicles. Anaerobic digestion is complimentary to other renewable energy sources, such as wind, solar and micro-hydro.
The farm could meet all its energy needs, plus the surplus for the local community.
The patented three stage digestion process naturally controls diseases, parasites and weed-seeds.
Re-powering your Digester
Many anaerobic digesters are temporarily shut down every 3 to 6 years so that inorganic sediments such as grit can be cleaned out. Normally this grit build up is hard to spot.
We can offer, through our partner companies, a longer term solution:Back to Top
Bioplex News for 2017
10% per Year
That’s the average rate of deposition of grit and other inorganic materials we have found in conventional anaerobic digesters.
Each year, this means 10% less space in the vessel for digestion, the biogas yield falls and with automatic feeding there is an increased risk of over feeding and process failure. Other potential problems are blockages, poor mixing and less heat transfer.
The average lifetime of a conventional digester, before shut-down and digging out the grit is perhaps 4 to 6 years.
With our patented process, this problem can be significantly reduced, even eliminated.
Note: Images on the right show one year’s worth of sandy deposits from a conventional digester, which are almost impossible to remove by mixing and pumping.
Introducing Portagester Ltd
Portagester Ltd is a newly formed company to:
- Anaerobic Digester upgrades. For example, by adding extra digestion stages to conventional AD plant to increase biogas (and energy) outputs from the same amount of feedstock and to improve reliability by significantly reducing the grit problem that often causes digester failure within 2 to 5 years.
- The UK and Ireland partner of Snow Leopard Projects (en.snow-leopard-projects.com). These range from 250 kW to 2 MW (and larger) biogas plant, some have been running for over 10 years. We share a common anaerobic digestion process, see Bioplex News - January 2004!
For more information please see www.portagester.comBack to Top
Bioplex News for 2015
25 & 50kW AD Plant
A new company to supply this small, yet important scale of anaerobic digesters will be announced later in 2015.
New Licensing in Progress
Licensing and technology exchange and licence for use of the Bioplex Process, in medium to large digesters, in countries bordering the Mediterranean Sea. Licence for Portugal starting in July 2015. (www.saigas.com)
Several digesters using the Bioplex Process produce biogas with methane content in excess of 70%, that’s more energy from less gas.Back to Top
Bioplex News for 2014
Winter is coming!
Trials using solid fuel made from the screened and dried digested solids. There is little or no nutrients in the fuel, these nutrients can be spread onto fields and gardens in liquid or solid form as a natural slow release fertiliser.
Second digester passes 5-year milestone
A second food waste treatment plant, built in 2009, whose biogas (final stage) digester has not had problems with grit and debris build up problems that can occur with conventional AD plant.
Note that digester vessels are transportable, with pipes and electrical connections plugged in.
The UK's first three stage AD plant
The reception and first stage digester under construction. The Bioplex process is used in this 125 kW AD plant and will use a mixture of farm animal and horse stable manures and home grown energy crops, under rotation.
Digester passes 5-year milestone
A Bioplex AD plant which treats food waste in accordance with Animal By-Products Regulations has now been in successful use for 5 years. This digester vessel originated from an earlier trial on the same site and is still working well.Back to Top
Bioplex News for 2013
Bioplex EU Expansion
Technology exchange and licence agreement for a manufacturing company to use the Bioplex Process in an EU country.
Kitchen Waste Portagester Operational
Second site using Portagesters to treat prison kitchen waste now operational. The food waste is digested, composted and screened - resulting in a good quality natural fertiliser and soil conditioner for on site use eg for gardens and within polytunnels.
The financial benefits are in the reduction or elimination of:
- waste disposal charges
- associated security with moving vehicles, bags and skips on and off site
- purchase of compost and fertiliser
Intangible benefits are:
- useful jobs and training within the institution
- control of pollution, odours, vermin and disease risk of food waste
- carbon sequestration and offset
Bioplex News for 2012
Channel Islands Trial
Portagester on trial in the Channel Islands. Many islands around the UK have high waste disposal costs and may need to buy in compost/fertiliser for its farms/horticulture. The Bioplex Process is ideal for local recycling, energy recovery and job creation.
Many islands have their own diesel fuelled generators for electricity generation. These could be converted to combined heat and power, to exchange heat for biogas from a nearby digester. Surplus heat could be used for heating of buildings, greenhouses and amenities.
Fourth Plant to gain ABPR Compliance
"Bioplex Process" source segregated food waste digester meets the Animal By-Products Regulations (ABPR).
This is the fourth Bioplex plant to comply. It fits neatly into an existing building, which has bunding and water catchment.Back to Top
Bioplex News for 2009
Local food waste treatment facility under construction, using the patented 3 stage anaerobic digestion and composting.
PG 1 digester at Center Parc. (Model shown includes additional on-board heater).
The trials showed that a small digester could convert kitchen/food waste within a small area on the site and produce a good fertiliser rich compost for the flower beds and lawns. The trailer can be towed around the resort to various restaurants, food shops and food waste collection bins. After digestion, the Portagester tips out the treated solids onto the composting pad and resumes the collection round. The complete cycle takes two to three days.
Chris Reynell helps to load a new PG 1 digester with manure at a livery stable. (Model shown includes additional on-board heater).Back to Top
Bioplex News for 2008
July - August '08
Roll on-off PG 4 Portagester ® which can be moved and emptied using a standard hook load lorry. One PG 4 can treat 2,500 tonnes per year of food waste whilst producing a slow release natural fertiliser and biogas from the second stage digester.
July - August '08
The Royal Welsh and Pembrokeshire Shows. The PG 3 Portagester ® can treat up to 7 tonnes per batch every two days and is suitable for farm animal manure, grass and vegetable waste treatment.
PG 1 Portagester ® and small second stage digester delivered to South Dorset for trials on the treatment of organic wastes including household refuse.
HM Prisons digester building work complete. HRH The Princess Royal visits the site during the design and construction period.
PG 3 digester delivered to Westray, for use at an abattoir. Pictures show the digester dealing with boxes of spoilt vegetables.Back to Top
Bioplex News for 2007
Testing of one of the three PG 1 digesters built for HM Prisons kitchens.
Picture showing results of the "kitchen top" digester composting trials.
The digested kitchen waste is added to lawn mower clippings in a garden composter, which accelerates the process with less odours and more natural fertiliser as a result.
Start of the development of the "kitchen top" range of digesters. The aim is to provide digesters, small enough to be used at home and in the garden, to produce a nutrient rich natural fertiliser that will accelerate and improve green waste composting e.g. lawn mower clippings.
Otter Rotters produce a natural fertiliser rich compost for use in a nearby commercial nursery.
Although the kitchen waste should be meat excluded, due to the risk of meat in the collected material, the process has been designed to meet the DEFRA's Animal By-Products Regulations (ABPR) standards.Back to Top
Bioplex News for 2006
Contruction work completed at Otter Rotters, Honiton, Devon.
Two PG 2 digesters and biogas digester have been installed to treat kitchen waste from 500 homes.
The Longstock Portagester ® is run to produce natural fertiliser compost for selling to local growers. Farm animal and horse stable manure is pasteurised, digested and composted.Back to Top
Bioplex News for 2005
The Portagester ® is an example of an anaerobic digester for DEFRA's Farming without Fossil Fuels project that looks at farming using home grown fuels and other renewable energy sources.
Project DIPROWASTE complete - results available to download.Back to Top
Bioplex News for 2004
Bioplex Ltd is to embark upon the evaluation of a patented low cost conversion of weeping walls, used widely on dairy farms, to an Anaerobic Digestion system. This will, in most cases, produce on-site energy and meet higher environmental standards.
Reading University Energy Group completes evaluation of a new farm waste treatment system, with production of fertiliser enriched fibre for composting and electricity.
WRc publishes landfill tax funded study of growing media derived from digested source separated household refuse, hotel, supermarket and catering wastes. Digested, composted and screened fibre makes a good nutrient rich and beneficial organic growing medium.
A new 5,000 tonne per annum farm and food waste digester, built under licence from Bioplex Ltd, operating in Co. Durham as a working prototype.
Mid point of EU funded (1.1 million Euro) digester research programme, DIPROWASTE (see www.diprowaste.com) to enhance the digestion process using novel techniques.
A result of EU collaboration is this German Portagester, built under licence.
Registered in England Company No. 03687673.
Windover Farm, Longstock,
Stockbridge, Hampshire SO20 6DJ.