When specifying a sewage treatment plant, being ‘fit for purpose’ and combining reliability and compliance are essential.  Thorpe Underwood is a beautiful estate spanning over 100 acres approximately 10 miles outside of York. The estate comprises a preparatory school, sport and leisure facilities, college, accommodation blocks and catering functions.

Due to expansion of the facilities, the flows and loads to the existing plant have increased over the years, and will continue to do so in the future, meaning the existing plant needed to be extensively upgraded.

WPL has worked on many healthcare, education and leisure developments in both the public and private sector providing solutions to meet a diverse range of requirements.  Due to the nature of the site, considerations such as variable flows and loads, installation costs and easy maintenance were vital.

Through consultation with Thorpe Underwood, WPL have provided a HiPAF® submerged aerated filter (SAF)  biological treatment zone to meet the Environment Agency consent standards of BOD 20mg/l; TSS 30mg/l and NH4-N 5mg/l.  The WPL HiPAF (SAF) was perfectly suited to the application due to its ability to meet the stringent Ammonia standard set in this instance.

In addition, the flexibility of the WPL HiPAF (SAF) which can be installed above or below ground was also a major factor for specification.  Due to the need for fast and easy installation, combined with as minimal excavation as possible, most of the individual process plant sections that have been supplied are for use above ground.  Monitors have also been installed to continually record information detailing final effluent ammonia concentration levels, controlling and adjusting the blowers automatically, ensuring the ammonia levels are optimised, this means the whole plant will operate as efficiently as possible and minimises electrical consumption.

For CPDs regarding sewage treatment plants please visit WPLs website where there is extensive information for architects and specifiers.

WPL and Atana are now a part of WCS Environmental Engineering

WCS Environmental Engineering is a part of the WCS Group, which has the in-house skills and expertise in place to deliver full turnkey solutions from influent to effluent, with the capability to close the loop with water reuse.