Turnkey septic receival station package solving sludge handling issues

With around 1.75 million Australians not connected to the public wastewater management system, the safe management of sludge from domestic and industrial septic tanks continues to be a challenge for local authorities and waste disposal organisations.

“Managing residential, municipal, rural and commercial waste is an ongoing health and safety, environmental and efficiency problem that is getting bigger, not smaller,” said wastewater and environmental specialist Michael Bambridge.

“The proportion of Australians not connected to a public system has remained fairly constant over the last decade at around seven per cent, so the problem is actually growing in absolute terms,” ​​said Mr Bambridge, whose company CST Wastewater Solutions makes a robust stainless steel wastewater collection station specifically designed to meet the safe, low-maintenance needs of rural areas where wastewater systems are most common. Such systems are particularly common in tourist and island areas in and around Australia and New Zealand. CST's wastewater collection stations have been widely used in Australia since 2005 and are now manufactured here.

To enable municipalities and operators to control and measure discharges into their wastewater treatment plants, CST Wastewater Solutions' wastewater packages include flow meters, control valves and fully automated controls, as well as a self-contained screen to remove septic solids, for example, before they enter local wastewater basins.

The tanker driver enters the facility using a dedicated trailer and then connects to the CST system using a standard camlock connector. This allows all discharges to be recorded, metered and, where applicable, billed to tanker services delivering from homes and businesses.

All material over 5 mm is removed and dewatered before the filtrate flows to the inlet of the treatment plant, reducing the risk of blockages.

The package system – which enables tankers to be unloaded within 20 to 30 minutes – is designed for reliability and ease of use in areas where municipalities and wastewater companies do not have large technical and operational staff.

Turnkey packages include:

  • Planning according to local conditions, project management, control, mechanics and assembly
  • A robust control system with data management for tanker unloading for efficient operation with direct unloading from tankers up to 100 kL/h
  • All stainless steel construction providing excellent corrosion resistance and fully enclosed to comply with WHS regulations
  • Optionally integrated stone catcher for separating coarse material
  • High-performance screening for processing sewage and industrial sludge delivered in tank trucks to wastewater treatment plants for further processing. The septic tank collection station removes rags, plastics and other non-biodegradable solids that can overload wastewater treatment plants and harm the environment.

For higher feed applications, the CST Wastewater Solutions rotary drum system is also suitable for certain installations.

The filtrate can be further treated with CST's multi-disk KDS separator using chemical conditioning to significantly reduce BOD (biological oxygen demand), dewater and densify the captured solids.

“Both the receiving stations and rotary drum systems are manufactured here in Australia from high quality stainless steel to ensure they are optimally fit for purpose. They are built to meet the highest reliability standards and, importantly, are backed by onshore support in Australia and New Zealand should any upgrades, modifications and maintenance be required, whilst ensuring supplies are delivered to the sometimes remote communities that depend on them.”

Featured image: Wastewater flows into a waterway, causing costly environmental problems. Image credit: CST Wastewater Solutions.

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