Advanced secondary with nutrient removal

For effluent that is to be of advanced secondary with nutrient removal quality it shall meet the following effluent compliance characteristics:

  • 90% of samples taken over the test period shall have a BOD5 less than or equal to 10g/m3 with no sample greater than 20g/m3.
  • 90% of samples taken over the test period shall have total suspended solids less than or equal to 10 g/m3 with no sample greater than 20 g/m3.
  • Where disinfection is provided, 90% of the samples taken over the test period shall have a thermotolerant coliform count (determined by either the most probably number of emebrane filter technique) not exceeding 10 organisms per 100ml with no sample exceeding 200 organisms per 100ml.
  • Where cholorination is the disinfection process, the total cholrine concentration shall be greater than or equal to 0.5g/m3 and less than 2.0g/m3 in four out of five samples taken.
  • 90% of the samples, with 95% confidence limits taken over the test period shall have a total nitrogen concentration less than or equal to 10mg/l.
  • 90% of the samples, with 95% confidence limits taken over the test periods shall have a total phosophorus concentration less than or equal to 5mg/l.

Approved facilities

Bushwater Pty Ltd

For further information phone 1300 736 130 or +61 7 5472 8875.

Ecomax Waste Management Systems Pty Ltd

For further information visit www.ecomax.com.au or phone +61 8 9455 3366.

More information

For more information about on-site sewerage, see our On-Site Sewerage page, email Building Codes Queensland, or phone 07 3237 1714.
Last Updated ( Friday, 28 March 2008 )