ACWA builds on Anglian success with new NITREAT® contracts
31 March 2011, News release from ACWA Services
ACWA Services' Nitreat® advanced nitrate removal technology has again been chosen by Anglian Water. The additional systems were selected by the @one Alliance, a collaborative organisation, formed to deliver about half of Anglian Water's capital investment programme for 2010-2015 and they will be installed at three additional sites across the Anglian region.
The Nitreat® system is based on true counter current continuous ion exchange, using a unique multiport valve to distribute the feed and regeneration flows to multiple resin vessels. For its 12 existing @one Alliance contracts, the company has developed a standard modular design that enables simple, cost-effective installation.
The system offers a considerable degree of flexibility as it can cope with large variations in flow and nitrate levels and produces far less waste regenerant than conventional plants.
The existing systems were installed during AMP4, and subsequently the @one Alliance's confidence in their robustness has enabled exceptional operational and capital efficiencies to be achieved. The forthcoming installations will be sited at a new 5.8MLD water treatment works at Glandford close to the North Norfolk coast, an existing 6.8MLD works at North Pickenham in mid-Norfolk, and a new 14MLD works at Mousehold, in North East Norwich.
Bob Hastings of ACWA Services, explains: "The ongoing choice of Nitreat® technology by the @one Alliance reflects the system's robustness, efficiency and operational economy and underlines their confidence in the system. Sustainability is a key concept for the @one Alliance, which fits extremely well with our own approach and we continue to work closely with them to further streamline the Nitreat® technology and ensure it continues to be the most robust and simple nitrate removal technology available".
In the last year of AMP5 (2014-2015), the @one Alliance is aiming to achieve an ambitious 20% reduction in operational carbon - carbon generated during the operational process - and a 50% reduction in 'embedded' carbon, which is inherent in the buildings and systems, as well as 20% cost efficiency savings.
We are working in collaboration with the @one Alliance sustainability team to deliver the targets and objectives of AMP5. There has been an optimisation programme to reduce operational carbon, and the confidence in ACWA's Nitreat® system has allowed the design envelope to be challenged in ways that historical approaches would not allow".
Key factors such as regenerant consumption, and the amount of wastewater produced by the plants have been trimmed still further, and each plant will receive a six-monthly health check as part of the contract as well as full process support and ongoing optimization.
ACWA Services Proposals Manager, Gary Harris notes: "The @one Alliance has worked hard to involve their supply chain and leverage the experience inherent in these companies to achieve significant reductions in their target carbon and cost areas. The Nitreat® system enables significant reductions for these vital issues, and has both a low whole life cost and an extremely competitive operational cost.
The proven, optimized Nitreat® technology is ideal for the three new sites, as the systems are very robust in design and performance. Each one is tuned on site exactly to the requirements for flows and incoming nitrate levels. 'It is an absolute imperative that the systems run to the minimum requirement with minimal intervention".
Gary adds: "We have a very strong rapport with our client, based on our long-term relationship, their desire to engage the supply chain and their confidence in the reliability of our company and technology.
This has created considerable synergies and advantages that hopefully will deliver AMP5 to the best advantage of the client, their customers and the environment".
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