Slide background HUBER Technology - More than 33,000 Installations Worldwide
Click through to learn about their innovative high quality stainless steel systems for municipal wastewater & sludge treatment
Slide background EPCO Australia - Proudly Delivering Water Assets for Over 50 years
Click through to learn about Epco's high quality clarifiers, digesters and package plants for municipal wastewater treatment
Slide background MENA Water - MBR Packaged Sewage Treatment Systems - Deployable or Permanent Solution for Housing Developments, Towns, Villages, Resorts, Mining and Construction Camps and Emergency Relief Operations
Slide background MENA Water - Packaged Drinking Water Treatment Systems - Deployable or Permanent Solution for Housing Developments, Towns, Villages, Resorts, Mining and Construction Camps and Emergency Relief Operations
Slide background Organica Water - A Truly Unique Solution for the Treatment and Recycling of Wastewater
Click through to learn how Organica designs WWTP's that have a fraction of the normal foot print and are odour free.
Slide background AEROSTRIP® - Advanced Fine Bubble Aeration Diffusers
Click through to learn more about the world’s most efficient biological aeration fine bubble diffuser systems
Slide background FlooBed® MBBR Technology for Municipal Wastewater Biological Treatment
Click through to learn more about how this advanced system can save energy and space treating your wastewater.
Slide background Neutralox Odour Control - High efficiency, compact photoionisation alternative
Click through to discover why Neutralox is Ideal for both centralised & decentralised removal of wastewater generated odour

What does the Future Hold for Municipal Biosolids Dewatering in Australia?

Each year in Australia over 85 million tons of biosolids (sludge) are dewatered at municipal Sewage Treatment Plants (STP’s) into around 1.65 million tons of dewatered biosolids, also called wet biosolids, which is trucked offsite for mainly reuse in agriculture and composting.

Dewatering takes place via a variety of methods, with centrifuges being most commonly used at 39%, followed up closely by belt filter presses and drying beds at 24% and 23% respectively.

Biosolids dewatering takes place in most of the 2400 STP’s in Australia.

Regionally there have always been trends in dewatering technology with centrifuges favoured by most large NSW utilities and belt filter presses being favoured in Queensland and Victoria, along with rural NSW.

Screw Press Comparison Belt Press Centrifuge Hydroflux

There is however a new trend emerging and it has become the primary choice of major utilities in Brisbane and Western Australia – dewatering via screw press.

This is an interesting development, as like most of the dewatering technology used, screw presses are not new and in fact may well be one of the oldest technologies. Indeed whilst the first centrifuges were used to separate dairy products around 1860 and belt filter presses were originally used in Europe in the early 1900’s for pulp and paper, screw presses were first used in Roman times for pressing wine.

This new trend is being driven by changes in our economy and concerns over the environment and sustainability as well as a need for municipalities to continually improve their efficiency and operating costs.

Huber Q Press Screw Press Sludge Dewatering

Large increases in operational and maintenance labour and power costs as well as the unsustainability of processes that use large quantities of washwater have certainly forced municipalities to look seriously at their current dewatering technology and search for better alternatives. Add odour generation, either around the dewatering process or in the dewatered biomass, noise and other environmental concerns and the reason for the trend away from belt filter presses and centrifuges to screw presses becomes patently obvious.

Add to this the major advances in screw press technology in the last 10 years, enabling screw presses to now successfully dewater Waste Activated Sludge (WAS) and the trend becomes one that is certainly here to stay.

In fact it is safe to say that we can expect that most medium to large municipal dewatering facilities will make the change to screw press based dewatering in the near future.

The original of this article was published on LinkedIn by John Koumoukelis, a Director of Hydroflux Huber Pty Ltd.

About the Hydroflux Group
The Hydroflux Group comprises seven companies based in Australia and the UK, providing design and build, equipment, processes and operational services in water and wastewater treatment. Hydroflux Huber specialises in municipal wastewater and sludge treatment and is the exclusive Australian representative for HUBER Technology, AEROSTRIP, CNP Technologies, Aeromix, Flootech MBBR and Organica Water.
Hydroflux Huber Pty Ltd is a member of the Hydroflux Group.
24 October 2016

Hydroflux Huber Pty Ltd
Level 26, 44 Market St. Sydney NSW 2000 Australia
P +61 2 9089 8833 F +61 2 9089 8830
[email protected]