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Email Link   Liquid Trade Waste

Liquid Trade Waste are liquid wastes that are discharged to the sewer from any business trade or manufacturing premises. It contains chemicals or other impurities other than domestic sewage.

Commercial and industrial liquid trade waste must be controlled to protect the public health, safety of council employees, sewerage system and ultimately, our environment.

Council's Liquid Trade Waste Policy

Council has a policy which outlines how liquid trade waste is managed and regulated in the Tweed Shire. The policy outlines the approval, monitoring and enforcement process for managing liquid trade waste, as well as how commercial sewer usage and liquid trade waste fees and charges are levied.

Liquid trade waste discharge is categorised and charged according to the following:

  • Quality of liquid wastes being discharged

  • Quantity of liquid wastes being discharged

  • Risk posed by these liquid wastes to the sewerage system, people and environment

  • Pre-treatment requirements

Compliance, Monitoring and Testing

Council manages liquid trade waste by implementing the following requirements:

  • Mandatory on-site pre-treatment requirements for commercial and industrial properties.
  • Guidelines for the amount and type of liquid trade waste allowed to be discharged to the sewer.
  • A licensing system, whereby trade waste dischargers are required to hold a current Trade Waste Agreement with Council.
  • A rigid compliance program involving monitoring and random sampling of commercial and industrial pollutants by Council.

On-site Pre-treatment

On-site pre-treatment refers to the treatment of liquid trade waste generated on the premises prior to its discharge to Council's sewerage system.

Pre-treatment may be very simple or quite complex, depending on the type of liquid waste being treated. Examples of simple pre-treatment facilities are grease arrestors, general purpose pits, silver recovery units, neutralising traps, cooling pits and oil separators. More complex pre-treatment might include chemical dosing, balancing tanks, biological treatment and pH control.

Examples of businesses requiring on site pre-treatment include:

  • Bakeries
  • Butchers
  • Café / Chicken Shops
  • Fish / Bait Shops
  • Hospitals and Nursing Homes
  • Hotels
  • Laundries
  • Motels
  • Printers
  • Registered Clubs
  • Restaurants
  • Service Stations / Motor Repairs
  • Shopping Centres

Acceptable Limit Guidelines

Council’s liquid trade waste policy outlines the general quality guidelines for liquid trade wastes being discharged to the sewerage system.

This includes, but is not limited to, the following frequently tested parameters:

  • Five day Biochemical Oxygen Demand BOD5 must be less than 600mg/L
  • Suspended Solids - Non Filterable Residue (NFR) must be less than 600mg/L
  • Oil and Grease must be less than 100mg/L
  • pH must be between 7 and 9
  • Temperature must be lower than 38°C

New Trade Waste Clients

Any person or business proposing to discharge liquid trade waste to Council's sewerage system must complete and submit the following to Council:

Fees also apply, depending on the type of business and estimated liquid waste quality and quantity. See Fees and Charges.

Should approval be given, approval conditions and approved plans will be issued prior to the commencement of any works.

Note than for some types of liquid trade waste, Council is required to obtain the concurrence of the NSW Office of Water prior to approving any discharge to Council's sewerage system.

Approved Trade Waste Contractors

Many liquid trade waste clients require regular removal of grease trap and other liquid or solid wastes that are not permitted to be discharged to the sewerage system. Contact one of the waste contractors below to enquire about this service.

Trade Waste ContractorPhone
Solo Resource Recovery 02 6674 7647
Summerland Environmental 02 6687 2880 or 02 6687 2880
Barkoola Environmental 07 3807 5508
Zappaway 07 5594 6694
Cleanaway 07 5594 6666
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