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Scottish Water install ResMix "Source Management" System at Second Water Supply Reservoir

 

Read the GE press release on the Scottish Water ResMix system.

 

Gurney Environmental has received a second order for the innovative ResMix "Source Management" system for use at Scottish Water's Barcraigs Reservoir, south of Glasgow. CLICK HERE to read the press release from Scottish Water.

 

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Recent Article about Gurney Environmental Ltd.

 

Read the recent article on Gurney Environmental

 

Read the article on 10 Years of Sustainable Water Treatment in the UK.

 

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Gurney Environmental Ltd. Provides New Treatment Facility
at Windsor Estate

 

Read the recent Gurney Newsletter

 

Following use of an Aero-Fac® system on Sandringham Estate for 6 years, Gurney Environmental was contacted by the Crown Estate to examine solutions for Windsor Estate. The old 1960-era filter works in the middle of the Great Park at Windsor needed replacement. Wastewater from Cumberland Lodge Conference Centre and a small housing complex created problems with intermittent flow and load due to the nature of the wastewater source.

 

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Gurney Environmental, WEARS Australia and South West Water Collaborate on Potable Reservoir Trial

 

Read the recent Gurney Newsletter

 

Gurney Environmental has installed an innovative ResMix unit in one of South West Water's drinking water storage reservoirs near Plymouth. The 400 DWI, a completely new model ResMix unit, was designed and manufactured by WEARS Australia and installed at the request of South West Water. The technology has a proven track record, when applied to impoundment reservoir "Source Management" but this is the first ResMix unit solely designed to maintain quality in treated water reservoirs. South West Water want to evaluate the benefits of mixing potable water reservoirs and, in particular, the effect mixing has on residual chlorine decay with the goal of improving water quality and acceptability as well as reducing operation costs.

 

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Gurney Environmental Provides Treatment Upgrade for
1.8 million Population City in Bolivia

 

Read the recent Gurney Newsletter

 

In late 2009, Gurney Environmental Ltd. completed the installation of an internationally tendered, World Bank funded project to address wastewater processing issues in the city of Santa Cruz de la Sierra, Bolivia. The 1.8 million population cityʼs infrastructure is under stress due to significant population growth. The wastewater treatment plant (wwtp) had been in an overloaded condition resulting in low rates of processing, sludge accumulation and odour issues.

 

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ANGLIAN WATER COMMISSION FOURTH
"ADVANCED LAGOON" WASTEWATER TREATMENT SYSTEM

Energy Conservation – Doing Things Smarter

Read the recent article from Water & Wastewater Treatment

 

In 2008 Anglian Water started construction on an unusual and somewhat unique wastewater treatment plant for the village of Sutton St. James in the Lincolnshire fens. A first for Anglian Water and, indeed, for any English water company, the wwtp was a significant departure from what had previously been the norm. Understandably, the new design was subjected to extensive capex, opex and carbon footprint scrutiny by the Anglian Water team. In the end, the Aero-Fac® treatment system was chosen as the best solution for their customers at Sutton St. James.

 

At the time, Anglian Water Contracts Manager John Forkin said, “We are committed to providing environmentally friendly and cost efficient solutions. The Aero-Fac® system offers a low carbon footprint solution both for construction and long-term operational costs. The system has no odour during normal operation and the earth banks around the cells give a visual aspect which is in keeping with the rural environment.”

 

In May 2009 when Hilary Benn MP, the former Secretary of State for Environment, Food and Rural Affairs officially opened the Aero-Fac® wwtp at Sutton St. James he proclaimed, "THIS is the future" of wastewater treatment. Mr Benn was highly impressed by the odour-free wwtp recognising that it had the lowest carbon footprint of all wastewater treatment options considered for the scheme.

 

Since 2008 Anglian Water has completed 3 more systems using the same treatment technology. At East Harling an Aero-Fac® primary treatment stage was added to an existing biological filter plant. At Welney/Christchurch a full Aero-Fac® wwtp was constructed, and at Saltfleetby St. Peter an Accel-o-Fac® wwtp, and even lower energy design, was used.

 

All four treatment plants incorporate a number of unique benefits, not least of which is a self-digesting sludge process that requires no pre-screening, sedimentation tanks or clarifiers, no sludge removal, dewatering or conditioning, and best of all, no routine sludge disposal and the associated lorry traffic in and out of the works.

 

The low carbon footprint is a core benefit of the Aero-Fac® wwtp, both in construction and long-term operation. A carbon footprint is a conceptual estimation of the works’ environmental impact. With the use of various factor conversions, a carbon footprint can be measured in tonnes of carbon dioxide equivalent.

Anglian Water’s “risk and value process” considered the carbon footprint of three broad treatment scenarios for Sutton St. James. The figures and trends illustrated in Table 1 are estimations by the Anglian Water energy team and reflect the specific Sutton St James situation, i.e. pumping away to a neighbouring catchment with an included upgrade to the receiving network. The carbon footprint estimation considers embodied carbon within the asset, and accounts for an operational carbon requirement per annum over an assumed 40 year life.

The table and chart demonstrate the lagoon system’s low embedded and operational carbon footprint. This is primarily through the re-use of onsite materials during construction and low energy consumption. These and additional low carbon considerations are further outlined below.

 

The treatment plant at Sutton St. James operates for an average energy consumption of about 60 kWh/day. Conventional treatment alternatives considered through the risk and value process, were estimated to utilise up to 360 kWh/day. The 300 kWh/day disparity in energy consumption represents a potential saving of 47 carbon tonnes CO2 equivalent per annum.

 

Energy saving is promoted both by the very low energy process equipment involved (some of which is wind powered) and by the nature of the aerated facultative system in forming three process layers rather than a reliance on complete mix as with extended aeration processes.

 

The energy efficiency of the process is further enhanced by the Aero-Fac® system’s flexibility in dealing with varied flows and peak loadings through a tailored control philosophy. The system only utilises more energy intensive apparatus with increased loading, and in contrast, can be powered solely by wind power when processing low flows.

 

The facultative biological process when correctly designed does not result in excessive sludge accumulation that requires removal. Sludge is self-digested anaerobically within the primary cell with inert material accommodated within the basal sludge blanket. Consequently, the system does not necessitate the handling or disposal of sludge or screenings. This eliminates the need for tanker movements; associated high grade access roads; an energy requirement for de-sludging and pre-screening apparatus; and negates any future landfill restrictions.

 

The Aero-Fac® and Accel-o-Fac® wastewater treatment systems operated by Anglian Water exemplify the efforts of water companies to meet the challenges of energy conservation and contribute to the global effort to reduce the impact of climate change and provide a truly sustainable alternative for wastewater treatment.

 

For further information please contact John Gillett on 01553 776202.

 

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MANGANESE CONTROL IN SCOTLAND

Gurney Environmental and WEARS featured in W&WT

Read the article on the Burncrooks Reservoir north of Glasgow where Gurney Environmental employed WEARS reservoir mixing equipment to provide a practical and cost-effective solution to water supply quality issues. For more information on Source Management and reservoir options, CLICK HERE.

Gurney Environmental/WEARS in Water Treatment & Supply

Here is another article on the Burncrooks Reservoir north of Glasgow where Gurney Environmental employed WEARS reservoir mixing equipment to provide a practical and cost-effective solution to water supply quality issues. Read the article. For more information on Source Management and reservoir options, CLICK HERE.