Effective leachate and trade waste treatment is rarely about a single piece of equipment. It is about how pumps, tanks, dosing systems, sensors, control hardware and safety infrastructure are integrated into a single, stable process that can operate day after day without interruption.
At Aerofloat’s Queensland leachate project for Priestley’s Gourmet Delights in Acacia Ridge, Brisbane, the focus was on building a system where every component plays a defined role. From chemical handling through to sludge transfer and process monitoring, the plant was designed to operate as a coordinated treatment platform rather than a collection of standalone assets.
A treatment system designed for industrial trade waste
This facility was developed to manage variable trade waste streams through controlled chemical dosing, balanced storage and mechanical handling of both liquid and sludge phases.
At the core of the system are dedicated balance, effluent and sludge tanks supplied by Bushmans. These tanks provide the volume and structural reliability needed to stabilise incoming flows and allow downstream processes to operate within controlled conditions.
Sludge management is supported by a FluidPro mixer inside the sludge tank. This maintains uniform consistency, preventing settlement and ensuring that material can be transferred efficiently for further handling and disposal.
Accurate dosing and chemical handling
Accurate flocculant and chemical delivery is central to leachate treatment performance. This plant uses:
- Helical rotor flocculant dosing pumps by Roto
- EMEC chemical dosing pumps supplied by Convergent Water Controls
- A dedicated flocculant emulsion makeup skid
- Saturator and transfer pumps by Ebara
These systems work together to maintain consistent chemical concentrations across changing flow and load conditions. This level of control helps ensure stable coagulation and separation performance throughout daily operation.
To support safe storage and spill management, IBC bunding systems from Global Spill Control were installed around chemical storage areas, providing secondary containment and compliance support.
Control systems and electrical integration
Plant automation is driven by Allen Bradley PLCs paired with Schneider switchgear. This combination provides a reliable control backbone for managing pump operation, dosing sequences and system alarms.
Instrumentation plays a key role in feeding real-time data into the control layer. The system includes:
- pH probes and controllers by Royce
- Field instrumentation supplied by IFM
These inputs allow operators to monitor process conditions and adjust chemical dosing and flow control as needed to maintain consistent treatment performance.
Sludge transfer and mechanical handling
Sludge movement across the system is handled by a mechanical diaphragm pump supplied by All-Pumps. This allows controlled transfer of thickened material without excessive shear or flow disruption.
Feed and transfer pumps by Roto and Ebara are positioned throughout the system to support reliable movement of both raw and treated streams between tanks and process stages.
This layout ensures that each phase of the treatment process remains hydraulically balanced, even as inflow and load conditions change.
Safety, access and operational design
Operational access and maintenance safety were built into the physical layout of the plant. Mobile access platforms from Bailey’s were selected to provide safe working positions around key assets including:
- Balance tanks
- Effluent tanks
- Dissolved air flotation systems
- Sludge tanks
These platforms allow operators and maintenance teams to move safely between process areas while maintaining clear access to critical components and instrumentation.
Bringing specialist suppliers into a single system
This project highlights how modern leachate and trade waste treatment relies on coordinated engineering across multiple specialist suppliers. Each component, from dosing pumps and mixers to control hardware and storage systems, was selected to perform a specific function within the wider treatment process.
By integrating these systems into a unified operational platform, the plant is able to deliver consistent performance, safe operation and long term reliability in a demanding industrial environment.
A practical model for future leachate treatment systems
This Queensland project demonstrates what can be achieved when chemical handling, mechanical design, automation and safety systems are developed as part of a single engineering approach.
Rather than operating as isolated assets, the plant functions as a connected treatment solution. One where monitoring, dosing, transfer and storage systems work together to support stable operation, regulatory compliance and ongoing process control.
For industrial sites managing complex trade waste or leachate streams, this type of integrated design provides a clear pathway toward more predictable performance and easier long-term operation.
