Monday, 15 April 2019 09:48

Stirrer keeps crusts away

Written by Mark Daniel

font size decrease font size increase font size
Print
Email

Enviro Solutions effluent stirrer.

A new heavy-duty, shore-based stirrer from effluent handling specialist Hi-Tech Enviro Solutions can help eliminate the problem of crusts forming on effluent pond or storage towers.

The machine is designed to deal with a pond of 3.5 million litres.

The stirrer, made extensively from high-grade galvanised steel, has a triangular pedestal designed to be bolted to a concrete pad at the edge of the pond.

A deep, square-section support tube, in this case 8m long, can be tailored to individual situations; it has a large propeller surrounded by a shroud not unlike an empty oil drum. The interaction between the propeller and the shroud is designed to increase the velocity of the liquid and to create a vortex that keeps solids in suspension and helps reduce the build-up of silted areas in a pond.

Depth control is achieved by a heavy-duty chain arrangement at the pedestal end, with an integral foot at the business end designed to protect the liner from damage.

Also at this end of the unit, a mechanical linkage can be adjusted to alter the angle of the propeller/shroud to mix thoroughly.

Power comes from a shore-mounted electricity supply from 4 to 7.5kW; gearbox reductions at the propeller end can be tweaked to a range of speeds and power requirements.

Published in Machinery & Products

Featured

Susan O'Regan Appointed New Chair of QEII National Trust

Minister of Conservation Hon Tama Potaka has appointed Susan O'Regan as Chair of the Queen Elizabeth II National Trust (QEII) for a three-year term.

Red Meat Farmers Welcome Labour's Emissions Pricing Pledge

Red meat farmers are welcoming Labour’s plan to review the Emissions Trading Scheme and not to campaign on pricing agricultural emissions.

NZKGI Responds to Migrant Worker Exploitation Reports

Where any worker in the kiwifruit industry is mistreated, we expect the authorities to take action.

Arable ROI Crisis: Why Canterbury Farmers Are Moving On

Mid Canterbury Federated Farmers arable chair, Bevan Lill, said Beef + Lamb NZ data indicated that for the last six years, the average arable return on investment was about 0.8% while inflation ran about 4% - so the average arable farm was going backwards at about 3% a year.

Seed Companies Say They See the Arable Exodus Coming

Seed and grain companies share the concerns of arable farmers about the viability of their sector, says Seed and Grain New Zealand chief executive Dr Sarah Clark.

NZIF Warns Rushed ETS Changes Could Hurt Forest Investment

The New Zealand Institute of Forestry (NZIF) says unnecessary changes to New Zealand’s Emissions Trading Scheme (NZ ETS) will seriously erode investor confidence and result in significant reductions in forest planting rates.