- // WASTE streams
Liquid waste
Expert liquid waste solutions: scheduled collections, bulk removal and emergency response for oils, chemicals and wastewater with full regulatory compliance.
Scheduled and bulk liquid waste removal by experienced teams
Managing contaminated wastewater from industrial cleaning requires advanced technical capability. We specialise in the collection, treatment, and compliant disposal of wastewater containing oils, chemicals, and other complex pollutants. Our processes are designed to separate contaminants and neutralise hazards, ensuring that all discharge meets strict environmental standards. By utilising state-of-the-art treatment facilities, we help you minimise your environmental footprint and avoid the risk of regulatory fines. Our technical experts can assess your specific wastewater profile to determine the most effective treatment pathway, providing you with a transparent and sustainable management strategy.
Common Streams of Liquid Waste
- We safely collect, transport and manage a wide range of liquid waste streams, including:
- Oily water and wastewater
- Grease trap waste
- Trade waste and process water
- Industrial washdown water
- Chemical and hazardous liquids
- Coolants, oils and lubricants
- Sludge and contaminated liquids
- Septic and holding tank waste
- Hydrocarbon-contaminated water
- Food processing and hospitality liquid waste
- Our team can assess your waste stream and recommend the most compliant and cost-effective treatment solution.
Ideal for
- Our liquid waste management services support businesses across many industries, including:
- Manufacturing and industrial facilities
- Automotive workshops and transport depots
- Hospitality venues and commercial kitchens
- Food and beverage manufacturers
- Construction and civil works
- Warehouses and distribution centres
- Healthcare and laboratory facilities
- Shopping centres and commercial buildings
- Councils and government infrastructure
- Mining and energy operations
Leading waste management and recycling specialists
- // how we work
Our approach to waste solutions
Sustainability
Protect your operations and stakeholders by reducing environmental impact and risk.
Recycling
Improve diversion and reduce contamination with durable, clearly labelled bins.
Cost savings
Cut disposal expenses with route optimisation, equipment ROI, predictable pricing.
Material recovery
Unlock revenue, resilience by reclaiming materials and closing supply loops.
- // why crown
Safety, Compliance and Peace of Mind
Crown delivers practical waste solutions with local accountability and national reach. We blend technical expertise with efficient logistics and EPA licensed processing partners. Clients gain predictable service, clear compliance records and data-driven insights that lower disposal costs and boost recycling. Our flexible contracts, rapid mobilisation and continuous improvement culture mean minimal disruption and measurable sustainability gains. Choose Crown for a trusted partner that turns waste challenges into operational advantages and long-term value.
- // insights
Frequently asked questions
What types of liquid waste do you accept?
We accept a vast range of liquid waste, including grease trap waste, used cooking oils, septic and sewerage waste, and industrial wastewater. We also specialise in hazardous liquids like chemicals, solvents, paints, and flammable substances. If you are unsure about a specific by-product, our technical team can perform a waste assessment to determine the safest collection and treatment pathway.
Do you provide scheduled grease trap servicing?
Yes. We offer reliable, scheduled grease trap cleaning for restaurants, hotels, and food processing facilities. Regular servicing prevents blockages, odours, and backups while ensuring compliance with local water authority regulations. Our team manages the entire process, from pump-out and cleaning to the compliant disposal of fats, oils, and grease, providing you with all necessary service documentation.
Can you handle bulk liquid waste removal for industrial sites?
Absolutely. We operate a high-capacity fleet of vacuum tankers designed for bulk liquid removal. We regularly service industrial plants, construction sites, and mines, managing large volumes of contaminated water, sludges, and liquid by-products. Whether it is a one-off tank clean-out or an ongoing industrial requirement, our logistics team ensures efficient removal with minimal impact on your site operations.
How do you manage septic and sewerage waste for remote sites?
We provide professional collection and transport of septic and sewerage waste for businesses, councils, and industrial sites across Australia. Our vacuum trucks can access remote or difficult-to-reach locations to perform pump-outs of onsite treatment plants and holding tanks. We ensure all waste is transported securely and disposed of at licensed municipal or industrial treatment facilities in full compliance with health regulations.