Explain in detail effluent treatment plant and sewage treatment plant with diagram

Effluent Treatment Plant (ETP) and Sewage Treatment Plant (STP) are both facilities that treat wastewater, but they serve different purposes and treat different types of waste.

1. Effluent Treatment Plant (ETP): ETP is used to treat waste that is produced as a by-product of industrial activities. This waste is often contaminated with chemicals, heavy metals, and other pollutants that can be harmful to the environment and human health. The main purpose of an ETP is to remove these contaminants and make the water safe for discharge into the environment.

The process of effluent treatment can be divided into three stages: primary, secondary, and tertiary treatment.

• Primary treatment involves the removal of solid waste materials from the water. This is usually done through sedimentation, where the water is allowed to stand undisturbed while the solids settle to the bottom.

• Secondary treatment involves the removal of organic matter from the water. This is usually done through biological processes, where bacteria and other microorganisms break down the organic matter.

• Tertiary treatment involves the removal of any remaining pollutants from the water. This can include processes like filtration, disinfection, and the removal of nutrients like nitrogen and phosphorus.

2. Sewage Treatment Plant (STP): STP is used to treat waste that is produced by human activities, such as waste from toilets, kitchens, and bathrooms. The main purpose of an STP is to remove contaminants and make the water safe for discharge into the environment or for reuse.

The process of sewage treatment can also be divided into three stages: primary, secondary, and tertiary treatment.

• Primary treatment involves the removal of large pieces of waste from the water. This is usually done through screening and grit removal.

• Secondary treatment involves the removal of organic matter from the water. This is usually done through biological processes, where bacteria and other microorganisms break down the organic matter.

• Tertiary treatment involves the removal of any remaining pollutants from the water. This can include processes like filtration, disinfection, and the removal of nutrients like nitrogen and phosphorus.

Unfortunately, I can't provide diagrams as I'm a text-based AI and don't have the ability to create or display images. However, you can easily find diagrams of ETP and STP processes by doing a quick internet search.