With the cost of energy continuing to increase, there is a clear need for an energy reduction benefit as part of every new project. A recent example of this is the contract for the upgrade of Listowel Sewage Treatment Works Aeration Basin, which was completed last February and incorporated fine-bubble diffused aeration.
The works involved the replacement of mechanical surface aerators with fine-bubble diffusers, duty and standby blowers on inverters and a dissolved oxygen-control system through a PLC. The aeration and pipework manifolds were constructed offsite to minimise site disruption, which allowed the plant to remain live during the installation.
The original installed power for the surface aerators was 70kw. This was replaced by two blowers with a combined installed power of 44kw. Inverter control allowed the blowers to run at 6.5-7kw during low-flow periods, resulting in energy savings of over 45 per cent in year one. Based on the first year, the complete project will achieve a payback in under two years.
Having recently announced its partnership with Stamford Scientific International (SSI), Avonmore Electrical believes in the potential for energy saving using SSI diffusers across many industries. For further information on energy-saving projects or to find out how your company can make energy savings, please contact
info@avonmore-electrical.com or call (022) 47477.
Avonmore Electrical is hosting a free seminar on EX Motor Maintenance in Dublin’s Red Cow Inn on 28 March, from 10am until 1pm. Topics covered include:
- ‘Motor nameplates – how to identify an ex motor’;
- ‘Personnel competency – what determines If I am competent to work on Ex motors?’; and
- ‘User obligations – what inspections must be completed, how often and the records to be completed on these inspections’.
Workshop demonstrations of Ex procedures are also included. To reserve your place, call (022) 47477, (01) 257 5000 or 086 8181406. See www.avonmore-electrical.com for more information.