Date posted: 14 June 2018
Biogas Systems, Manufacturing
Our Biogas and Manufacturing divisions recently completed a joint Biogas project in the USA for WesTech Engineering. Located in Rahway, New Jersey, the tank-mounted BioSphere gasholder has a capacity of 1,350 cubic metres with a base diameter of over 23m and a height of over 6m. This project is the first of three phases for Rahway Valley Sewerage Authority, an autonomous agency that owns and operates a trunk sewer system and a wastewater treatment facility in Rahway, New Jersey. The RVSA currently serves more than 250,000 residents and 3,500 industrial and commercial customers in 14 communities in central New Jersey.
AJ Tensile Biogas Systems and AJ Tensile Manufacturing Ltd will also be manufacturing BioSphere gasholders for Tank No.2 and Tank No. 3.
Date posted: 30 May 2018
Biogas Systems, Manufacturing
This article by James Brockett originally appeared in the May 2018 Water & Wastewater Treatment newsletter, and is reproduced with permission.
A J Tensile Manufacturing Ltd fabricated the biogas domes at our manufacturing plant in Caldicot, South Wales.
The £60M scheme changes the way the company treats waste before generating green power and will make the process considerably more efficient, meaning the amount of clean energy generated will increase by almost a third. More than half of the plant is now up and running and it is expected to be fully operational by the end of the summer.
Severn Trent said the Minworth site already generates enough clean electricity to power the equivalent of 11,000 homes and enough gas to heat 4,800 homes every year, with this set to increase as the THP comes online.
David Nyul, who is leading the project for Severn Trent, said: “It’s really exciting to see this cutting edge technology starting to become operational.
“This has been a huge investment for us and this innovative tech means that we’ll be generating more green power than ever before at Minworth. We have significant expertise in anaerobic digestion and THP is the next step to make the process even more efficient in the future.”
The process works by heating sewage sludge to 170°C and then pressurising it. The thermal hydrolysis process has an additional benefit as the leftover solids can be classified as “enhanced” status fertiliser and could potentially be used in the production of crops for human consumption, Severn Trent said.
Nyul added: “Minworth is our biggest sewage works and treats waste water from more than 1.6 million homes and businesses across Birmingham and the Black Country. The technology we have already generates both power for use in the works and gas for injection into the national grid.
“The bio-gas we create through this process will both be used to generate electricity and to be treated at our gas to grid plant on site to make it suitable for domestic use before being injected into the grid where it will be used by local homes and businesses.
“The new THP will increase our generation which is good for Severn Trent, for our customers and for the environment.” Severn Trent aims to generate 50 per cent of the energy it uses by 2020.
The company announced plans to invest £100 million to “get ready for the future” as it posted its latest set of financial results on 23 May.
Author: James Brockett, Water & Wastewater Treatment newsletter
AJ Tensile is seeking practical self employed sub-contractors to assist us with the installation of various projects (predominantly biogas membranes) throughout the UK.
CSCS accreditation is a must, along with a hands-on and flexible approach.
Please email firstname.lastname@example.org expressing your interest.
Date posted: 19 April 2018
Biogas Systems, Manufacturing, Uncategorized
This 3890 cubic metre slab-mount BioSphere gasholder is getting final checks at our production facility before being packaged up ready for installation at Knostrop Sludge Treatment Facility in Leeds. Our team will be installing it over a period of two weeks for our client Black and Veatch.
Inflation test at our production facility of the inner liner for a 975 cubic metre gasholder at Sandown, Isle of Wight.
The second of three large gasholders having the finishing touches applied at our Caldicot production facility before being carefully packed, crated up and shipped to Malaysia.
Date posted: 3 January 2018
Biogas Systems, Tensile Fabrications
Water and Wastewater Treatment Online reports that Welsh Water Infrastructure – a part of the not-for-profit Glas Cymru group which includes Dŵr Cymru Welsh Water – has taken ownership of a food waste anaerobic digestion (AD) and composting plant in Cardiff as part of its plans to further develop its waste and renewable energy business. AJ Tensile Biogas Systems designed, project managed and installed the fabric digester roofs, which were manufactured by sister company AJ Tensile Manufacturing Ltd.
The plant was previously owned by Kelda Water Services, is located within the company’s Cardiff Wastewater Treatment Works in Tremorfa, and already supplies the site with renewable energy. With this investment in food waste digestion on the site, around 50% of the energy used by Cardiff Wastewater Treatment Works is now generated by the company through sustainable, renewable generation.
The major advantage of anaerobic digestion is that methane, which is produced naturally when the food waste breaks down, is captured and used to generate renewable electricity and heat rather than allowing it to escape to the atmosphere from landfill sites.
This latest development comes as Welsh Water continues to expand its use of renewable sources across wind, solar, and anaerobic digestion facilities. Around 23% of the energy currently used by the company comes from renewable sources – meaning it now produces more clean, green energy than ever before. With an average energy bill of around £41 million a year, Welsh Water plans to increase the amount of renewable energy it generates to 30% by 2020 which will help the company reduce its costs and keep bills lower for customers.
Welsh Water Infrastructure Managing Director, Sonia McCorquodale, said: “Welsh Water is one of Wales’ largest energy users as the company uses a lot of energy to pump and treat water and wastewater. This latest investment will help the Glas Group to generate more renewable energy as we play our part in helping to manage the effects of climate change by becoming energy neutral by 2050.
“As a not-for-profit Group, we ensure that the gains we make go back directly into our services to benefit our customers, now and for generations to come.”
Cabinet Member for Clean Streets and Recycling, Cllr Michael Michael said: “All of our city’s food waste, which has historically been buried in landfill sites, is now treated at this plant where green energy is created from waste. As part of the sale, the terms and conditions of our contract remain unchanged and we look forward to working with Welsh Water, developing our established relationship as we both look to progress more, exciting renewable energy projects.”
As part of our strategy to cope with ever-increasing production demand, AJ Tensile Group recently upgraded our Manufacturing division’s 12kW Forsstrom HF welding machine to a 17kW FIAB 900. Part of the improvements involved mounting the FIAB to a 28m table, more than double the length of the Forsstrom’s old one.
Out with the old Forsstrom…
…and in with the new FIAB.