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Oily liquid trade waste is generally produced from the washing down of
vehicles/machinery and parts. Pollutants created from these activities include
petroleum based oils and greases, solids, heavy metals, solvents and nutrients.
MANAGEMENT OF OILY WASTE
Pre-treatment Treating your waste before it enters the sewerage system helps to achieve acceptable levels of pollutant concentrations. Roofing, bunding, dry basket arrestors, retention pits and oil separators are the predominant devices used in oily waste installations.
Roofing and Bunding Wash areas are required to be roofed and bunded to keep out rainwater and retain wash water.
Dry Basket Arrestors are required to collect suspended solids such as metal parts, rags, cigarette butts, stones etc.
Collection, Retention and Transfer Pits A collection sump/well is the first collection point of wastewater from wash down bays and sheds. It directs effluent to the retention pit, houses the dry basket arrestor and may provide silt retention.
Retention Pits are required to provide minimum standing times for the effluent so the detergent/oil/water can begin to separate. The pits must hold 750Litres or have a retention time of more than 1 hour, whichever is the greater.
Oil Separators remove oil from water allowing the water to be discharged to sewer and the oil to be recycled. They are required at all workshops that handle oil and must have a sampling point that is checked regularly to ensure it is working correctly.
Detergents and Degreases effect the
| operation of oil separators. Petroleum based products are not suitable for discharge to sewer. You will need to ask your chemical supplier which detergents are compatible with your pre-treatment equipment.
Housekeeping By following these practices you can help your business reduce the cost of discharging trade wastewater by reducing pollutant levels.
Use absorbent spill kits to soak up oil and fuel spills
Sweep floors instead of hosing
Properly clean and maintain equipment
Do not use petroleum based products
Council has the right to inspect premises for compliance and illegal discharges may result in fines, disconnection from the sewer system and/or prosecution.
If your business is not connected to the sewer system, the wastewater will need to be collected in drums or tanks and be transported to a licensed waste facility. Regulations may apply to the storage of these containers
For further information or advise on wastewater requirements please contact the Moree Plains Shire Council.
Trade Waste Officer
Water and Waste Department
Tel: (02) 6757 3400
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 Greasy liquid trade waste is generally produced by businesses involved in the processing of food. Pollutants created from these activities include oil, grease and food scraps. MANAGEMENT OF GREASY WASTE Pre-treatment Treating your waste before it enters the sewerage system helps to achieve acceptable levels of pollutant concentrations. Grease arrestors and dry basket arrestors are the predominant devices used in greasy waste installations.
Grease Arrestors are required to trap all greasy waste produced at food premises. The grease arrestor allows wastewater to be retained long enough for solids to sink to the bottom and lighter components such as grease and oil to float on top. The cleaner water left after separation takes place can then enter the waste stream.
Sizing requirements for grease arrestors are based on daily effluent flows and restaurant/café seating capacity with the minimum size allowable for any business being 1000litre.
Vents are required on all grease arrestors to ensure the treatment process works efficiently.
Dry Basket Arrestors are required on all floor and sink drains in food preparation areas to screen out gross solids such as food scraps, packaging, rags etc.
Detergents and Degreases effect the operation of grease arrestors, therefore appropriate products are essential.
You will need to ask your chemical supplier which detergents are compatible with your pre-treatment equipment.
| Housekeeping By following these practices you can help your business reduce the cost of discharging trade wastewater by reducing pollutant levels.
Use absorbent spill kits to soak up oil and grease.
Sweep floors instead of hosing them down.
Scrape off as much food as possible from plates and utensils into a garbage bin before washing up.
Do not pour milk, fats and oils down the drain.
Council has the right to inspect premises for compliance and illegal discharges may result in fines, disconnection from the sewer system and/or prosecution.
If your business is not connected to the sewer system, the wastewater will need to be collected in drums or tanks and be transported to a licensed waste facility. Regulations may apply to the storage of these containers
For further information or advise on wastewater requirements please contact the Moree Plains Shire Council.
Trade Waste Officer
Water and Waste Department
Tel: (02) 6757 3400
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Liquid Trade Waste Information Sheet
Managing Your Liquid Trade Waste
Trade Waste Application Form
MPSC Liquid Trade Waste Policy