Biological Treatment for Wastewater

What is the biological treatment for wastewater?

In recent times, with an exponential increase in industries worldwide, wastewater treatment and its safe disposal is a growing concern. Wastewater needs to be disposed safely, without causing harm to humans or the environment. The wastewater treatment process has been designed and perfected over the years to minimise its impact on the environment. Nowadays, more and more industries are resorting to use biological treatment of the wastewater produced at their factories.

All wastewater treatment systems start with the primary step to remove large solids from the water. This is followed by the secondary step, which is the biological wastewater treatment. What exactly is biological treatment of wastewater? In simple words, biological wastewater treatment systems use naturally-occurring microbes, such as protozoa or bacteria to clean the water. These microorganisms have the ability to break down organic waste matter. These disintegrated organic waste matter then settle to the bottom of the treatment plant, allowing clean and fresh water to flow freely on top.

Currently, two kind of biological wastewater treatment processes are being used: aerobic and anaerobic.

Biological Treatment for WastewaterOxygen is the main component in an aerobic wastewater treatment. This allows the growth and multiplication of useful microbes that assist in breaking down complex, organic solid wastes in the water. Specialised professionals will carry out calculations to find out the ratio of aerobic microorganisms needed for a particular quantity of organic waste. These aerobic treatment processes can be used in combination with anaerobic processes to optimise the wastewater treatment process.

In anaerobic wastewater treatment, no oxygen is used. Anaerobic microorganisms convert organic pollutants in the wastewater to biogas. This biogas mainly consists of carbon dioxide and methane. A slight disadvantage of the anaerobic process is that it proceeds at a slower rate, and can take up to three months for complete treatment of water.

After the biological treatments are completed, additional treatment using UV or chlorine is also introduced into the water. In some cases, ultrafiltration and reverse osmosis techniques may be employed to ensure maximum cleanliness of the water. Biological wastewater treatment offers a variety of advantages. The main advantage is that the process can remove up to 98% of organic pollutants in the wastewater. Additionally, the process is also cost effective and energy efficient.

By-Jas Engineering provides a wide variety of sewage treatment services. All our products are designed and manufactured using the highest quality materials. Our team of professionals can carry out a whole range of wastewater and sewage treatment services for you, such as examining the ideal treatment services for your company, plant specifications, design parameters assessment, negotiation with local and regional authorities, technical assistance and so much more.

To find out more about our services or to get in touch with one of our experts, call us on (03) 5979 1096. You can also visit us at to find out more about our full range of services.

We service all over Australia, including the main capital cities, regional town centres and all remote regional areas across the country.


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