Battery and chemical recycling company Hydromet wants to build a new liquid waste recycling and disposal facility at Unanderra that would accept about 6500 tonnes of inorganic waste liquid per year.
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The company already recycles lead and acid from batteries at the site but wants to set up the new liquids facility to receive liquid waste – acid, caustics and pickling liquor from aluminium, steel and galvanising industries.
The expansion would “increase the volume of liquid waste going to sewer”, Hydromet says, above the current 450 megalitres it presently has permission from Sydney Water to discharge into the sewer under a “trade licence”.
Liquid waste would be “neutralised” with lime, then slurry removed and solids sent to landfill. The liquid remaining would be treated again, tested and discharged to the sewer.
Hydromet plans to harvest stormwater to use in the plant, an attempt to reduce the amount of town water consumed.