Wastewater Pumping Equipment

Wastewater

Maroochy, Australia

Retrofitting with Rotamix mixing technology proves a success for sewage treatment plant in Australia

A new Vaughan Rotamix process mixing system has been successfully retrofitted into an existing 17.5 metre diameter, 1.2 million litre capacity digester at the Maroochy Sewage Treatment Plant, Queensland, Australia. The Rotamix package was supplied to the Maroochy Alliance Joint Venture by Pump Systems Ltd after providing a successful CFD (Computational Fluid Dynamics) model of the proposed system.

All Rotamix designs are supported by CFD analysis, either by standard modeled geometries, or by using customised models that are individualised to meet specific application parameters on a consultation basis. The software used at Vaughan Co., Inc. for analysis is among the top programs available in the world for this type of detailed computer flow modeling work, which essentially breaks down the fluid volume into hundreds of thousands of volume elements for analysis.

At the Maroochy site, all existing gas mixing equipment and pipework was removed, and two Vaughan Rotamix double nozzle assemblies were then installed inside the floor of the digester. Two 30 kW model HE8N10 horizontal end suction Vaughan Chopper Pumps (duty & standby) were installed just outside the digester to perform as the mixing pumps.

View this project at www.chopperpumps.com.au

To view further information on Vaughan Rotamix please click here

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Manukau City, New Zealand

Vaughan Rotamix provides high efficiency mixing at low levels for sludge blending system

Pump Systems Ltd have recently completed a sludge tank blending project with the installation of three Rotamix sludge tank mixing systems at the Mangere Wastewater Treatment Plant, Manukau City, Auckland. The revolutionary sludge tank mixing system uses three dual sets of powerful floor mounted nozzles to mix a blend of WWTP sludge's and solids up to 6% inside three 8 to 10 m diameter sludge tanks.

The unique flow pattern created by the fixed floor nozzles eliminates dead spots, reduces energy requirements and virtually eliminates solids settling out inside the tank. The big advantage is that there are no moving parts inside the sludge tank, therefore the sludge tank blending systems are virtually maintenance free.

Each sludge tank blending system uses an HE series horizontal end suction Vaughan Chopper Pump which is specially designed to handle solids laden sludges containing fibres and hair. The heavy duty Vaughan Chopper Pump preconditions the sludge which avoids clogging of the floor mounted nozzles and also stops the problem of fine fibres and hair reweaving into small clumps, which can cause a build up of solids on the surface of the sludge and the floor of the tank.

View this project at www.chopperpumps.com.au

To view further information on Vaughan Rotamix please click here

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Christchurch, New Zealand

Lackeby non-clog sludge heat exchangers installed at local wastewater treatment plant

Pump Systems Ltd have recently supplied six large Lackeby sludge heat exchangers as well as other specialist sludge pumping equipment to a wastewater treatment plant in Christchurch, New Zealand as part of a new plant room upgrade package. The all stainless steel heat exchangers were custom built to meet the special requirements of the client, and were supplied complete with closed circuit water loop pumps.

The unique design offered by Lackeby provides many process and cost benefits when compared to traditional heat exchanger designs. Efficiency of digestion and hygenisation is enhanced, equilisation of the sludge temperature profile is improved, and unlike spiral heat exchangers, the innovative large sludge channel and open end turning chamber design minimises the risk of clogging.

To view further information on Lackeby Sludge Heat Exchangers please click here

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