Improving Trade Waste Quality

Trade waste can contain pollutants like sediment, grease, oils and chemicals, which have entered the discharge water during industrial processes. When these pollutants enter the wastewater system they can block pipes, cause overflows and damage the wastewater network, placing both public health and the environment at risk. By minimising the pollutants in trade waste, you can protect the health of the public and the environment. 

What can you do to help?

Think about what goes down the sink. The way your business treats waste affects everybody.

Everything that is put down the drain requires transport and treatment. The greasy waste produced in industrial processes can lead to blockages that can create overflows of wastewater into the environment. By producing less waste, your business can save money on trade waste charges and reduce pump outs of your grease traps.

Your business can help by: 

  • disposing of greasy waste and food scraps into the rubbish bin
  • never putting oil down the sink
  • training staff on why it is important to keep fats, oils and grease out of drains and sewers
  • installing and maintaining grease traps/grease interceptors
  • arranging waste oil to be collected by a licensed waste contractor

For industrial companies, it is important to ensure that only clean rainwater enters the stormwater drains on or near the premises. Your business can help by:

  • immediately cleaning all spills and leaks
  • prevent wash water from entering the stormwater drains
  • ensuring contaminated areas are bonded and wastewater is directed to the sewers

Grease traps

The purpose of a grease trap is to prevent food scraps, oils and grease entering the wastewater system.

Fats and oils solidify and rise to the top and solids sink to the bottom, reducing the amounts of these substances that enter the wastewater system. The grease trap must be cleaned out regularly to remove the build up of grease and solids that occurs over time.   

If regular cleaning is not maintained, grease traps can flood without warning, which could be unsafe to the public and the environment.

Page reviewed: 16 Jan 2014 3:05pm