NEWS


Severn Trent expands green arm with £120m buyout


Rolls-Royce expands its position in the microgrid market


Founded in 1994, Agrivert UK is a specialist in


renewable energy generation from food waste and has a string of anaerobic digestion plants and waste composting sites in the South of England and Wales. It processed more than 310,000 tonnes of solid organic


waste in 2017 and has long-term contracts with local councils and 20-year renewable energy subsidies backed by the Government. Agrivert's UK operations will now be added to Severn


Trent's existing Green Power business and its plants will complement the division's two food waste plants in Coleshill and Roundhill, near Stourbridge , and a third site under construction in Derby. The AD development site in Derby will include: a waste


reception building containing solid waste storage bunkers and a liquid waste storage tank; thermos-pressure hydrolysis vessel and auxiliary steam accumulator and an open bed woodchip and bark biofilter. Also part of the facility will be a combustion plant


consisting of two biogas boilers (2.17 MWth), two primary digester vessels and one secondary digester vessel and a gas upgrading plant. According to a decision document, published by the Environment Agency, solid food waste will be pre-treated within the reception building, through a series of steps including de-packaging, particle size reduction and mixing with liquid wastes, resulting in a blended feedstock. All wastes will then undergo sterilisation to comply with


the Animal By-Products Regulations. This will be achieved within a sealed thermos pressure hydrolysis vessel in which the blended feedstock is exposed to an elevated temperature and pressure. Then sterilised waste is discharged into an enclosed put, screened to remove any large materials and pumped out of the reception building into a cooling tank. The cooled feedstock will then be transferred to one of


two buffer tanks before being pumped to primary and secondary digesters where the feedstock undergoes digestion for a period of approximately 40 days. Biogas is kept at low pressure in the floating roofs which fill and empty as the biogas levels within the digestion tanks change. The biogas produced within the digestion tanks will be predominantly upgraded to ensure it meets the quality requirements for injection into the National Grid. Severn Trent said the purchase of Oxfordshire-based


Agrivert UK will take its investment in energy and renewables to approximately £300 million by 2020. Liv Garfield, chief executive of Coventry-based Severn


Trent, said: "We're delighted to welcome Agrivert UK into the Severn Trent Group. Renewable energy is strategically important to Seven Trent and the UK as a whole as we work towards achieving our decarbonisation targets and delivering attractive shareholder returns. Agrivert UK strengthens our established presence in anaerobic digestion where we have been leaders in the water sector for many years.”


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Rolls-Royce is investing Qinous, a global provider of innovative energy storage and control sys- tems, and adding turnkey microgrids to the portfolio. “As a strategic investor, the aim is to set up a partnership with Qinous for the develop- ment of innovative energy storage solutions & together offer cleaner solutions designed to meet tomorrow’s needs,” Marcus A. Wassenberg, CFO & Labour Director at Rolls-Royce


networks, or microgrids, combine cogeneration plants, diesel- and gas-powered gensets and renewable sources with batteries and a control system. This links up all the elements in an


Power Systems, tells UKPN. The increased use of renewable energies has exacerbated the challenge of how to maintain a reliable energy supply, when weather conditions are unfavourable, to meet demand. Autonomous electricity


in reducing diesel fuel consumption and generator maintenance costs by integrating renewable ener- gies and energy storage into diesel generation plants. The investment made by Rolls- Royce will be used to expand & strengthen its existing product portfolio.


Grid Energy has installed its largest and most powerful temporary power hybrid genset at a London Underground train station


considerable experience in the integration of battery storage and energy systems in microgrids in more than 30 projects worldwide and has already integrated MTU Onsite Energy systems from Rolls-Royce in such projects. Qinous is known for its work


storage and renewable sources, operators of hotels, hospitals or schools are able to make significant fuel cost savings and at the same time protect the environment ,” comments said Qinous CEO Steffen Heinrich. Qinous has gained


intelligent energy management system designed to optimise the energy usage technically and economically. “With the use of energy


Twelve weeks ago a temporary power hybrid unit, claimed to be the largest and most


powerful in the UK been installed at London’s Kennington Underground station. It was required to energise construction equipment and safety lights on four new customer passageways being built at the tube station as part of the Northern Line Extension programme. This will expand the underground network from Kennington to Battersea Power Station via Nine Elms. Off Grid Energy has provided its technology, which it said to result in a significant


improvement in fuel efficiency and reduce emissions and noise pollution, while cutting costs. The unit also includes storage capacity of 350kWh and smart monitoring, enabling the company to use data from this project to judge how much power would be needed for similar projects in the future. According to the company, ‘Grid to Go™ is a ruggedised hybrid generator set, designed for


operation in demanding environments and where it is expected to work hard for a living. With an impressive standard specification, Grid to Go™ can be augmented with optional features such as remote monitoring, solar PV input, road tow trailer as well as the options for customer specified features’. The hybrid genset has been designed as a portable power supply which can work together


with a generator to reduce running hours and cut fuel consumption. When the generator runs it is made to work as efficiently as possible with any spare energy being stored in a high power battery pack. When the battery is charged and demand for power is low, the generator can turn off and the energy stored in the battery is used to supply the load. When the battery runs low or the load increases, the generator is told to start up again. This process is automatic, says Off Grid Energy.


SEPTEMBER-OCTOBER 2018 UK POwER NEwS


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