From Waste Streams - Apr/May 2006
www.WasteStreams.com.au
Technology for the reduction of filterable reactive phosphorous (FRP)
During the last decade, the significance of FRP reduction from the water column and the sediment P release control in preventing algal blooms has been recognised. In order to control the P level in water bodies, a number of chemical methods, such as alum or ferric chloride, have been used over the last few decades. However, many scientific studies have demonstrated significant limitations associated with these methods, including the re-release of the sorbed P when physiochemical characteristics of the water body, such as its alkalinity or redox conditions, are changed. In addition, key water quality parameters, such as the ph and conductivity of the water body, can also be affected.
Given the role of the FRP in phytoplankton activity and the limitations of the currently used chemical methods, there is a great need for a technology that can reduce the FRP concentration of the water column and prevent the release of the sediment P under a wide range of chemical conditions (ph, salinity and redox), without affecting the key water quality parameters. The need has been met by a modified bentonite product known as Phoslock.
It removes FRP effectively as it descends through a water column. As it settles, it forms a capping on th e bottom sediment preventing any further release of FRP into the water column.
The product has been demonstrated to have a rapid FRP uptake kinetic, removing 90% of it within the first four hours. In addition, it is shown to operate within a wide ph range (5-11), without any significant change to the ph of the water body.
It performs efficiently in a wide range of water bodies, ranging from natural waterways, aquaculture and a variety of waste waters such as sewage treatment holding lagoons, farm dams, poultry, dairy and piggeries. Furthermore, the removal of arsenate , selenate and molybdate has also been demonstrated.
Phoslock Water Solutions Ltd
235 Sutherlands Road, Riddells Creek 3431
Friday, May 12, 2006
Rainwater bladder tanks
From Waste Streams - Apr/May 2006
www.WasteStreams.com.au
Rainwater bladder tanks
Rainwater bladders are flexible water tanks that can fit under a house. The bladders are claimed to be able to capture up to 500% more water than a standard tank system.
The Rain Reviva system is suitable for sites where a water tank won't fit because of lack of space or where access is difficult.
A traditional water tank will only capture water from one side of the roof, whereas a bladder installed under the house uses the entire catchment surface area of the roof, which means that more rainwater is diverted into the tank.
In addition to the bladder-like tank, the system incorporates an 'inlet diversion' - a 'swing arm' system - that efficiently diverts the rainwater from each downpipe into the water sacs. A pump system then allows the water to be reticulated to a range of devices from the garden hose and the pool to sprinkling systems, and even the washing machine and dishwasher.
Rain Reviva
2 Melba Avenue, Lilydale 3140
www.WasteStreams.com.au
Rainwater bladder tanks
Rainwater bladders are flexible water tanks that can fit under a house. The bladders are claimed to be able to capture up to 500% more water than a standard tank system.
The Rain Reviva system is suitable for sites where a water tank won't fit because of lack of space or where access is difficult.
A traditional water tank will only capture water from one side of the roof, whereas a bladder installed under the house uses the entire catchment surface area of the roof, which means that more rainwater is diverted into the tank.
In addition to the bladder-like tank, the system incorporates an 'inlet diversion' - a 'swing arm' system - that efficiently diverts the rainwater from each downpipe into the water sacs. A pump system then allows the water to be reticulated to a range of devices from the garden hose and the pool to sprinkling systems, and even the washing machine and dishwasher.
Rain Reviva
2 Melba Avenue, Lilydale 3140
Converting wastewater salt into cleaning compound
From Waste Streams - Apr/May 2006
www.WasteStreams.com.au
Converting wastewater salt into cleaning compound
Dairy companies are closing the recycling
Researchers involved with the Dairy Australia-funded project at Food Science Australia in Sydney are only months away from discovering a way to recycle the salty water that forms in waste milk after the solids have separated from the liquid.
According to Dairy Australia's head of resource management and technology, Neil van Buuren, the researchers are exploring a simple concept that could deliver significant environmental benefits.
"As well as being environmentally responsible, dairy manufacturers would save thousands of dollars by recycling wastewater and reducing the amount of salt in effluent," Mr van Buuren said.
"The salt would be used to make alkaline and acidic cleaning compounds, which would also reduce the need to purchase concentrated cleaners.
"While this discovery would have immediate benefits for dairy manufacturers, dairy farmers should be able to use the same technology on their farms and get the same benefits," Mr van Buuren said.
Researchers in the US have also discovered a new way to clean and disinfect milking equipment using electrolysed oxidising water.
This water is created when the electric current flowing through two electrodes - immersed in a weak salt solution and separated by a membrane - produces an alkaline and an acidic solution.
"The US researchers and Australian researchers have used the same science, but with a different raw produce," Mr van Buuren said.
"The Australian researchers are trying to recycle a waste product, not create a new salt solution," he said.
This project is part of the Closing the Loop initiative which is funded by Dairy Australia and The Geoffrey Gardiner Dairy Foundation. It aims to cut the environmental footprint of Australia's dairy factories. The third research partner is the Department of Primary Industries.
www.WasteStreams.com.au
Converting wastewater salt into cleaning compound
Dairy companies are closing the recycling
Researchers involved with the Dairy Australia-funded project at Food Science Australia in Sydney are only months away from discovering a way to recycle the salty water that forms in waste milk after the solids have separated from the liquid.
According to Dairy Australia's head of resource management and technology, Neil van Buuren, the researchers are exploring a simple concept that could deliver significant environmental benefits.
"As well as being environmentally responsible, dairy manufacturers would save thousands of dollars by recycling wastewater and reducing the amount of salt in effluent," Mr van Buuren said.
"The salt would be used to make alkaline and acidic cleaning compounds, which would also reduce the need to purchase concentrated cleaners.
"While this discovery would have immediate benefits for dairy manufacturers, dairy farmers should be able to use the same technology on their farms and get the same benefits," Mr van Buuren said.
Researchers in the US have also discovered a new way to clean and disinfect milking equipment using electrolysed oxidising water.
This water is created when the electric current flowing through two electrodes - immersed in a weak salt solution and separated by a membrane - produces an alkaline and an acidic solution.
"The US researchers and Australian researchers have used the same science, but with a different raw produce," Mr van Buuren said.
"The Australian researchers are trying to recycle a waste product, not create a new salt solution," he said.
This project is part of the Closing the Loop initiative which is funded by Dairy Australia and The Geoffrey Gardiner Dairy Foundation. It aims to cut the environmental footprint of Australia's dairy factories. The third research partner is the Department of Primary Industries.
Water reclamation plant unveiled in Noosa
From Waste Streams - Apr/May 2006
www.WasteStreams.com.au
Water reclamation plant unveiled in Noosa
Econova techology treats water like gold
Petrac has unveiled its Queensland designed water reclaimation plant on the Noosa North Shore. With the message that water can be treated like gold, the plant takes good care of delicate environments tht exist in the lowlands of the Noosa North Shore, using the latest membrane technology.
Fewer nutrients and pollutants will flow from the site with the wastewater treatment plant turning out a previously unreachable Grade A + standard.
Petrac's director of development, John /campbell said the $1.2 million installation represented a significant improvement on the wastewater system that the company inherited when it bought the site.
"We worked with the Environmental Protection Agency and our environmental engineers Cardno to identify how we could sustainably reuse wastewater while meeting stringent environmental standards," he said.
The contract involves EcoNova providing the technology that can reclaim wastewater and treat it to a standard surpassing EPA guidelines.
Cardno's project engineer, Michael
chessells, said potable water consumption will be reduced by 10-15% by watering lawns with reclaimed water and because the sewage treatment plant was replaced with the water reclamation plant.
www.WasteStreams.com.au
Water reclamation plant unveiled in Noosa
Econova techology treats water like gold
Petrac has unveiled its Queensland designed water reclaimation plant on the Noosa North Shore. With the message that water can be treated like gold, the plant takes good care of delicate environments tht exist in the lowlands of the Noosa North Shore, using the latest membrane technology.
Fewer nutrients and pollutants will flow from the site with the wastewater treatment plant turning out a previously unreachable Grade A + standard.
Petrac's director of development, John /campbell said the $1.2 million installation represented a significant improvement on the wastewater system that the company inherited when it bought the site.
"We worked with the Environmental Protection Agency and our environmental engineers Cardno to identify how we could sustainably reuse wastewater while meeting stringent environmental standards," he said.
The contract involves EcoNova providing the technology that can reclaim wastewater and treat it to a standard surpassing EPA guidelines.
Cardno's project engineer, Michael
chessells, said potable water consumption will be reduced by 10-15% by watering lawns with reclaimed water and because the sewage treatment plant was replaced with the water reclamation plant.
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