Why ETP Is Required?

What is the meaning of ETP plant?

Effluent Treatment PlantEFFLUENT.


• ETP (Effluent Treatment Plant) is a process design for treating the.

industrial waste water for its reuse or safe disposal to the environment..

How many types of ETP plants are there?

2 Types of Effluent treatment plants you should know about.

Is sewage water used for drinking?

In some parts of the world, the wastewater that flows down the drain – yes, including toilet flushes – is now being filtered and treated until it’s as pure as spring water, if not more so. It might not sound appealing, but recycled water is safe and tastes like any other drinking water, bottled or tap.

What is COD and BOD in ETP water?

COD or Chemical Oxygen Demand is the total measurement of all chemicals (organics & in-organics) in the water / waste water; BOD is a measure of, the amount of oxygen that require for the bacteria to degrade the organic components present in water / waste water.

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 is ETP and WTP?

Environmental Solutions, Sewage Treatment Plants (STP), Efflaent Treatment Plant(ETP) & Water Treatment Plant(WTP) | NT AGNI.

Why alum is used in ETP plant?

Alum is the coagulant of choice for many industrial and sanitary wastewater treatment applications, due to its high efficiency, effectiveness in clarification, and utility as a sludge dewatering agent. The chemical leaves no residual color, offers very good turbity removal, and is available as G.R.A.S.

How does pH increase in wastewater?

Common chemicals used to increase alkalinity and pH include:Calcium oxide or calcium hydroxide (as lime slurry)Sodium hydroxide (caustic soda)Sodium carbonate (soda ash) or sodium bicarbonate.Magnesium hydroxide or magnesium bicarbonate.

Why is COD higher than BOD?

The COD test uses a chemical (potassium dichromate in a 50% sulfuric acid solution) that “oxidizes” both organic (predominate) and inorganic substances in a wastewater sample, which results in a higher COD concentration than BOD concentration for the same wastewater sample since only organic compounds are consumed …

What is a good BOD level?

BOD values are usually reported in either ppm values or in mg/L values. Unpolluted rivers typically have a BOD below 1 mg/L. Moderately polluted rivers vary between 2 to 8 mg/L. Untreated sewage averages between 200 and 600 mg/L while efficiently treated municipal sewage would be 20 mg/L or less.

What is the function of ETP?

1. Effluent Treatment Plants (ETP): Effluent Treatment Plants or (ETPs) are used by leading companies in the pharmaceutical and chemical industry to purify water and remove any toxic and non toxic materials or chemicals from it. These plants are used by all companies for environment protection.

What chemicals do ETP plants use?

ETP ChemicalsUrea/DAP.Anticipant liquid/powder.Sodium bi Carbonates for PH enhancement.Chlorine.Alum.Silica.Ferrous Sulphate etc.

What is difference between STP and ETP?

1- ETP may be a system that removes toxic and non-toxic material from water and making it usable for various purposes. STP unit removes contaminants from municipal wastewater or household sewage. 2- ETP is employed in industrial areas whereas STP cleanses household water.

What causes low pH in wastewater?

If the influent pH is satisfactory, then the low effluent pH is usually caused by nitrification in combination with low natural alkalinity in the wastewater.

How do they treat sewage?

Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. The settled and floating materials are removed and the remaining liquid may be discharged or subjected to secondary treatment.

How many types of wastewater treatments are there?

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.

How does a STP work?

STP calculates the path cost based on the media speed (bandwidth) of the links between switches and the port cost of each port forwarding frame. Spanning tree selects the root port based on the path cost. The port with the lowest path cost to the root bridge becomes the root port.

What are the 4 steps of water treatment?

Community Water TreatmentCoagulation and Flocculation. Coagulation and flocculation are often the first steps in water treatment. … Sedimentation. During sedimentation, floc settles to the bottom of the water supply, due to its weight. … Filtration. … Disinfection.

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 causes COD in wastewater?

High COD/BOD levels in stormwater runoff are cause by the residual food and beverage waste from cans/bottles, antifreeze, and emulsified oils from industrial food processing and agricultural activities. As most forms of COD are water soluble, this pollutant spreads easily via stormwater to waterways.