Following an intricate diving operation, ESD (the joint venture involving Galliford Try, MWH Treatment and Black & Veatch) has completed the successful upgrade of its mixing operation at Scottish Water’s Wastewater Treatment Plant (WWTP) in St Andrews, Fife.
In 6m-deep zero-visibility wastewater, three divers (and a dive manager) ensured that there was no interruption to the crucial aeration process in the oxidation ditches, which since 2002 has been served by three very low rpm Landia mixers.
Situated close to where the sport of golf was first played in the 15th century, just a few miles from the oldest golf course in the world, the WWTP, which has UV filters for its final effluent, is in an extremely sensitive area that welcomes visitors from all over world. At just 34 rpm, the 4kW Landia mixers very gently mix sludge so as not to cause any process-damaging floc shear.
Subscribe to PII and receive:
Our long-established bi-monthly digital magazine *Process Industry Informer*, featuring exclusive articles, news and updates across the Process Industries, plus commentary from our three industry experts:
Sean Moran
Gavin Smith
Dave Green
PLUS:
- Process Industry Update — our weekly e-newsletter
- PII Podcast
- Special messages from our advertising partners
“The Landia mixers have always worked well”, said St Andrews WWTP Site Manager, Alan Mearns. “This is the type of reliable equipment we want as ESD delivers improvements to Scotland’s water and wastewater infrastructure”.
He added: “Working purely by touch in such a challenging environment wasn’t easy at all for the divers, but over the 3-day installation that included new guide rails, they did a great job in ensuring that we could still maintain sufficient flow for our process”.
In addition to the three adjustable-pitch submersible Landia units in the main oxidation ditch, there is also one Landia mixer in the Sludge Holding tank for SAS (Surplus Activated Sludge) and one in the anoxic Inlet Tank.
Apart from a 10-minute stop every 4 hours, the three Landia mixers in the oxidation ditch run 24/7, sustaining a required gentle flow of just 0.3 metres per second. Landia’s in-house team will also service the mixers every 6 months.
Landia 01948 661 200
Landia Ltd
- 0194 8661 200
- info@landia.co.uk
- http://www.landia.co.uk
- Waymills Industrial Estate, Whitchurch, Shropshire, SY13 1TT GB
About us
Landia's headquarters are located in Lem, which is how it has been since 1933. Today, Landia has subsidiaries in England, Germany, Norway and the US, and a sales office in China. In addition, Landia products are sold in 45 countries worldwide. Landia supplies pumping and mixing solutions to many different industries, with the most important ones being agriculture, wastewater, biogas plants and the fish industry. In general, you will find Landia's products wherever there is a difficult medium to be pumped or mixed. Landia survives by selling quality solutions in close partnership with the customers.
Landia is not a supermarket where customers select products from the shelves. Our technical sales people are always in close discussions with customers, which ensures solutions that work. For Landia, quality in every phase a matter of course, and we have been ISO9001 certified since 1994. Quality also means that many of Landia's products have been in operation for 20-25 years even though the operating conditions may be extreme. In that way, Landia's customers achieve the lowest lifespan costs, while resource consumption is minimised, which further results in a positive impact on the environment.
Where we supply to
Europe, Africa, Asia, Australia, South America, North America
Industries we supply to
Chemicals
-
Landia GasMix operating in tank
-
LANDIA's EradiGator - Heavy Duty Chopper Pump Mixes & Chops To Clean Your Wet Well
-
POPL Tarm WWTP
