Quick Answer: What Are The Two Main Constituents Of Sewage?

What are the 3 types of sewage treatment?

There are three main stages of the wastewater treatment process, aptly known as primary, secondary and tertiary water treatment.

In some applications, more advanced treatment is required, known as quaternary water treatment..

What are the constituents of concern in wastewater treatment?

Some constituents of concern in wastewater treatment are: Total solids, composed of floating matter, settleable matter, colloidal matter and matter in solution; Biodegradable organics, usually measured in terms of biochemical oxygen demand (BOD) and of chemical oxygen demand (COD); Pathogens, some of them can transmit …

What are the main steps in sewage treatment?

Treatment StepsStep 1: Screening and Pumping. … Step 2: Grit Removal. … Step 3: Primary Settling. … Step 4: Aeration / Activated Sludge. … Step 5: Secondary Settling. … Step 6: Filtration. … Step 7: Disinfection. … Step 8: Oxygen Uptake.

What are the methods of sewage treatment?

Four common ways to treat wastewater include physical water treatment, biological water treatment, chemical treatment, and sludge treatment. Let us learn about these processes in detail. In this stage, physical methods are used for cleaning the wastewater.

What are the types of sewage?

There are two types of sewage: treated and untreated. Treated sewage: Treated sewage refers to wastewater or sewage which has passed through a treatment plant. Sewage goes through several stages in the treatment process ensuring that all harmful bacteria, pollutants and contaminants are eliminated.

What are the two products of sewage treatment?

Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater (or treated effluent) that is safe enough for release into the environment. A by-product of sewage treatment is a semi-solid waste or slurry, called sewage sludge.

Why do we treat wastewater?

The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment. As solid material decays, it uses up oxygen, which is needed by the plants and animals living in the water.

What is called sewage?

Sewage, or domestic/municipal wastewater, is a type of wastewater that is produced by a community of people. It is characterized by volume or rate of flow, physical condition, chemical and toxic constituents, and its bacteriologic status (which organisms it contains and in what quantities).

What are the constituents of wastewater?

Components of Waste WaterBiochemical Oxygen Demand (BOD) … Total Suspended Solids (TSS) … Pathogens. … Nutrients. … Contaminants of Emerging Concern (CEC)