Sewage Treatment 

Streamlining the process of supplying wastewater treatment solutions

Aerators and Wastewater Treatment Plants

Design
By-Jas have one of the largest and most experienced Process Engineering teams in Australia. Our expert team can design full scale & wastewater treatment plants to meet your needs.
Experienced with working on all types of industries, based right across Australia. Our team can design and build an end-to-end plant, or an individual treatment process.
Fabrication
Our manufacturing facility, located in Hastings, Victoria, turns our designs into reality, following strict quality assurance processes.
Built on site, all of our water treatment plants and wastewater treatment plants can be fabricated offsite, allowing site enabling works and civils can be undertaken simultaneously, reducing timelines and improving health and safety outcomes.
Maintenance
By-Jas are continually searching for wastewater technologies that will significantly improve the way in which treatment processes are undertaken in Australia.
We have a range of sewage treatment plants available that can be used to prove a unit process, prior to designing a full scale plant.
The By‑Jas system provides a range of aerators for sewage treatment plants matched to individual drive units to provide superlative surface aeration and mixing characteristics with a minimum expenditure of power. Surface aeration is a process which promotes oxygenation of large fluid volumes.
Oxygenation is most often necessary because impurities and bacteria present within the fluid (e.g. polluted water or sewage) demand and consume large quantities of oxygen. Consequently, there arises a need to re‑establish the dissolved oxygen content of the liquid either in order to sustain fish and plant life in a river or lake, or to accelerate treatment within a sewage processing system.
Surface aerators have, over the years, been the subject of intensive development, their chief application having been in the activated sludge process of sewage treatment. The prime factor affecting their design is naturally the efficiency of the transfer of oxygen to water. Surface aerators attempt to develop the largest possible interfacial area between air and liquid so that oxygen can diffuse from the air into the liquid.
In achieving this, it is necessary to prevent local build up of oxygen concentrations by promoting good mixing with the water. By‑Jas’ surface aerator satisfies both of these criteria in that it draws liquid from below water level and discharges it in a heavy torrent to create high turbulence when it strikes the water surface with great force. The character of the aerator is an important factor influencing the rate of oxygen transfer. The shape of the blades, depth of immersion and speed of revolution are some of the parameters which determine oxygen transfer.

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Wednesday 21 September

We’ve got great news from our Incident Management Team – the Shepparton Wastewater Management Facility has returned to normal winter operating levels, and odour is no longer being released from the aerated lagoons.

With that, its been recommended to close out the IMT this week and we’ll be working on some wider communications materials to inform the community about our progress and success in returning the plant to normal.

We’re seeing a continuing downward trend in the levels of organic load leaving the High Rate Anerobic Lagoon, which is the primary treatment lagoon at the facility. It’s returning to levels we normally see in winter, close to 100mg/L, which we’re really happy with, and shows the lagoon’s treatment performance has stabilised and is working well. We’re also seeing temperatures begin to increase in the lagoon, and continuing warmer weather will create more optimal treatment conditions.

You can see the trends in the 14-day average graph below. Under optimal treatment processes, the gap between the orange and blue lines should be as large as possible.

We’ve also seen more key areas in our key performance indicators turn green over the past two weeks. There are still a few yellow ones, but we’re confident they’re very close to turning green in the near future as well.

These indicators show key data we’re looking at during wastewater sampling in the main treatment lagoons, including pH levels, alkalinity levels, VFAs (volatile fatty acids), the VFA to alkalinity ratio, as well as dissolved oxygen and organic loading – all are important in ensuring the wastewater treatment process works as best it can.