Scottish Water and Veolia Water UK, the operators of the Seafield Waste Water Treatment Works will continue to monitor the facility for any potential odour issues following the completion of the multi-million pounds Odour Improvement Plan.
Construction began in autumn 2009 and was completed in summer 2011. The works is undergoing a strict monitoring regime which is being carried out by a number of environmental regulators.
We have kept the local community and its elected representatives fully informed, and met regularly during the construction programme. We have continued to keep them updated.
The Odour Improvement project involved the installation of two new Odour Treatment Units, ductwork and support bridges, new coarse and fine inlet screens, channel covers, weir covers at Primary Settlement Tanks and improvements to the detritors which are now capable of removing fine particles of grit - reducing the risk of blockage and potential odour generation.
The plant is capable of producing up to 2300 kilowatts of sustainable electricity. Offset, this is enough to power up to 600 homes. This is produced by gas powered generators which use the gas produced in the 6 digesters on site to generate this ‘green’ power.
The facility is managed on our behalf by Veolia Water UK, one of the world’s leading environmental services providers, under a 30 year Private Finance Initiative contract which has been running since 1998.
As part of our ongoing commitment to communicate with stakeholders, on Friday 11th October, Seafield WwTW operators Veolia Water will undertake cleaning work on Detritor No 2 in a planned and controlled operation. This is to allow for the fitting of a new modulating penstock on Monday 14th October.
Detritor No 2 was routinely cleaned just 2 months ago so we do not envisage there to be much grit to be removed, therefore it is anticipated that today’s operation should be carried out fairly quickly. The plant will operate as normal during this procedure as the flow to Detritor No 2 will be isolated and diverted.
As is the normal procedure, Veolia has phased the operation to minimise odour risk and, as part of that process, will closely monitor weather and operational conditions throughout this activity. As there is a risk of odour during the procedure, strict odour monitoring will take place and steps taken quickly to deal with any issues. In line with the site Odour Management Plan, Veolia has undertaken an odour risk assessment of this operation and have shared the information with Scottish Water, City of Edinburgh Council and SEPA.
In September 2013 we announced that Stirling Water will invest in a new thermal hydrolysis plant (THP) at Seafield.
This is an innovative way of treating sewage sludge while generating green energy to help power the works. It will produce sludge which can be used as a fertiliser. Less solid matter will be left over after the sludge is treated, meaning around 30% less sludge will need to be transported from Seafield after treatment. For more info see our news release.