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Receival, Storage and Outloading

Live-Bottom Silos and Bunkers

SPIRAC have been the market leading supplier of live bottom silos and bunkers for the wastewater industry since the 80’s. Hundreds of successful installations are in operation around the world, many in service for several decades.

SPIRACs live-bottom silos and hopper systems are custom designed for application in the wastewater industry, especially for the storage, transfer and outloading of dewatered sludges. While the silos and hoppers follow standardized design features, sizes and orientations can be customized to suit most customer requirements.

Three standard configurations are available to provide a wide range of cost effective designs. These silos are top loaded, typically by shaftless spiral incline or vertical/horizontal conveyors, and outloaded by large diameter/large pitch live-bottom shaftless screws. These live-bottom systems ensure the elimination of arching, ratholing or any bottle-neck type losses in flowability, even for the stickiest or driest of sludges. The basic silo design incorporates aesthetic considerations through symmetry, consistency and fabrication precision.

 

 

PRODUCT BENEFITS
  • Prevents material bridging
  • Efficient handling of sticky or fibrous inconsistent materials and foreign objects
  • High capacity outloading rates
  • Low RPM/low run hours mean wear components inside silo will last 15-20 years
  • Low power consumption
  • Reliable operation
  • Very simple control system
  • Built in redundancy through multiple screw operation
  • Very few moving parts
  • Low maintenance
  • Storage capacity: 25 – 1000m3 (32-1300 yd3)
  • Outloading Capacity 0-200 m3/hr (0-260 yd3/hr)

Photo gallery

Live Bottom Silo InstallationLive Bottom OutloadingLive Bottom Silo InstallationLive Bottom Truck ReceivalLive Bottom Silo 3D

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      OUR FAQS

      Frequently Asked Questions

      Why Should You Buy From SPIRAC?

      SPIRAC is a trusted global leader in engineered wastewater solutions for materials handling, delivering reliable, purpose-built systems backed by decades of expertise. Customers choose SPIRAC for its ability to design and manufacture high-quality shaftless spiral conveyors, screenings handling systems, and bulk solids handling equipment that perform in the toughest industrial and wastewater environments. With a strong focus on innovation, durability, and low maintenance, SPIRAC solutions are engineered to reduce downtime, improve operational efficiency, and minimise lifecycle costs. Supported by a global footprint and dedicated local service, SPIRAC partners closely with clients to provide customised, end-to-end solutions that consistently deliver long-term value and performance.

      When you choose SPIRAC, you can expect a reliable partner committed to delivering high-performance, engineered solutions tailored to your specific needs. From the initial consultation through design, manufacturing, and installation, SPIRAC works closely with clients to ensure every system is fit-for-purpose and built to last. You can expect robust equipment designed for harsh operating conditions, minimal maintenance requirements, and long service life. SPIRAC also provides strong technical support, responsive service, and ongoing collaboration to optimise system performance, reduce operational costs, and ensure your materials handling processes run smoothly and efficiently.

      SPIRAC can confidently demonstrate a proven track record built on decades of global project delivery and industry expertise.

      With installations in municipal and industrial facilities across Australia, Europe, the Middle East, the UK, and North America, SPIRAC has successfully delivered thousands of materials handling systems operating in demanding environments such as wastewater treatment plants, pulp and paper mills, food processing facilities, and heavy industry. Its shaftless screw conveyor technology is widely recognised as a benchmark in the industry, with many long-term installations still operating efficiently after years of continuous service. In addition, SPIRAC supports its reputation with documented case studies, repeat clients, and ongoing partnerships with leading engineering firms and utilities—demonstrating consistent performance, reliability, and customer satisfaction across a wide range of applications.

      At SPIRAC, we understand that accurate cost visibility is critical to successful project planning. That’s why our team is ready to provide detailed, transparent quotations tailored to your specific requirements. Whether you’re upgrading existing infrastructure or planning a new installation, we work closely with you to scope your needs and deliver a clear, competitive proposal. With our engineering expertise and practical industry knowledge, you can move forward with confidence—knowing your solution is both technically sound and commercially aligned. Reach out today and let us help you plan with certainty.

      only
      56%
      of domestic wastewater is safely treated worldwide, and we aim to help improve this.
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      we serve clients in
      60+
      countries worldwide