Why is secondary treatment also called biological treatment? What is the principle involved? Wha

step 1 we will be discussing the differences between families and secondary sewage treatment. Now we kn

Why is secondary treatment also called biological treatment?...

Key Concepts

Trickling Filter

The trickling filter is another secondary treatment method where wastewater is distributed over a bed of materials that support a biofilm of microorganisms. As the wastewater passes through, the microbial biofilm degrades the organic matter, thereby purifying the water before it undergoes further treatment or discharge.

Secondary Treatment

Secondary treatment is a stage in wastewater treatment where biological processes are used to remove dissolved and suspended organic matter from wastewater. It is called biological treatment because it relies on microorganisms to break down and digest the contaminants present in the water.

Biological Treatment

Biological treatment refers to processes that use living organisms, typically microorganisms, to metabolize organic pollutants. This approach reduces the pollutant load by converting harmful substances into simpler, less harmful compounds, and is widely used because of its efficiency and cost-effectiveness in treating municipal and industrial wastewater.

Microbial Degradation

The principle of secondary treatment is based on microbial degradation, where bacteria and other microorganisms consume organic matter as a source of energy and nutrients. This natural process transforms organic pollutants into carbon dioxide, water, and biomass, effectively cleaning the wastewater.

Activated Sludge Process

The activated sludge process is an alternative technique in secondary treatment that involves aerating the wastewater to support the growth of aerobic bacteria. These bacteria form a floc or sludge which removes contaminants by digesting the organic material present in the water.

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