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Description
The Dryden diffusers are among the most robust and
versatile fine bubble diffusers commercially available. We have been
manufacturing the diffusers for 20 years and are the leading air diffuser
manufacturer in Scotland.
Fine bubble diffusion is inherently more effective than coarse bubble
diffusion in providing a greater mixing action and aeration efficiency. We are not aware
of any other fine bubble diffuser that can compare with the performance of the Dryden Aqua
diffuser.
The diffusers are of semi-flexible construction 32mm in diameter and of
variable length up to 5 metres depending on the air, oxygen or carbon dioxide through-put
required. The diffusers have their own ballast and will stay on the bottom of the aeration
tank without the need to add additional ballast or to secure them to the base.
Construction
The diffusers are manufactured from a very heavy duty
polyester fabric tube, a nylon distributor hose runs down the centre of
the tube. Between the nylon hose and polyester tube there is a ballast
comprising of spherical glass beads.
The diffuser is banded using 316 stainless steel
compressed on to the nylon inner tube with a nitride rubber bush.. The
metal end fittings are 3 316 stainless steel. fittings. As standard each
diffuser is fitted with a 1/2" acetyl plastic hose tail for connection of
the diffuser to 1/2" flexible hose. The plastic hose tail is screwed into
the stainless steel fitting on the end of diffuser.
Cleaning
Solid diffusers have problems with carbonate and iron deposition in the
stones which blocks the diffusers. Solid diffuser are very difficult
to clean and maintain. Flexible membrane diffusers stay largely free
of fouling, however they need a heavy frame or are anchored to the base of
the aeration tank, this makes the diffusers much more expensive and
difficult to handle, it also makes them difficult to use in lagoons.
The Dryden Aqua diffuser is a hybrid unit, because it is semi flexible,
carbonates and metal oxide precipitates simply crack off the unit. Also
because our diffuser has its own internal ballast it does not need to be
anchored to the base of the tank. If any cleaning or maintenance is
required, the diffuser is simple pulled our of the tank using the
air hose. The tank can be full of water and the air blowers running
when the diffuser is removed.
Life of diffuser
Normal operating life is from 5 to 10 years
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