10+ ETP Operator Interview Questions and Answers

The chemical used mostly in ETP plants is coagulant.

• Coagulant is used to destabilize and aggregate suspended particles in wastewater.

• Common coagulants used in ETP plants include aluminum sulfate, ferric chloride, and polyaluminum chloride.

• Coagulants help in the removal of pollutants like suspended solids, organic matter, and heavy metals.

• The choice of coagulant depends on the specific wastewater characteristics and treatment goals.

ETP is a wastewater treatment process that removes pollutants from industrial effluent. COD is a measure of organic pollutants, BOD is a measure of biodegradable organic pollutants.

• ETP stands for Effluent Treatment Plant

• COD is Chemical Oxygen Demand, a measure of organic pollutants in water

• BOD is Biological Oxygen Demand, a measure of biodegradable organic pollutants in water

• pH level of acid is below 7

• pH range of base is above 7

• pH range of neutral is 7

• MLSS stands for Mixed Li...read more

The hardness of treated water refers to the concentration of minerals, while pH measures the acidity or alkalinity of the water.

• Hardness of water is determined by the presence of minerals such as calcium and magnesium.

• It is measured in terms of milligrams per liter (mg/L) or parts per million (ppm).

• Water with high hardness may cause scaling in pipes and appliances.

• pH is a measure of the concentration of hydrogen ions in the water.

• It ranges from 0 to 14, with 7 being neutral, ...read more

The TDA value of inlet and outlet depends on the specific ETP system and its design.

• TDA stands for Total Dissolved Solids and is a measure of the amount of dissolved solids in water.

• The TDA value of inlet water is typically higher than that of outlet water in an ETP system.

• The TDA value can be affected by factors such as the type of wastewater being treated, the treatment process used, and the efficiency of the system.

• The TDA value is important to monitor as high levels can i...read more

TDS stands for Tax Deducted at Source.

• TDS is a system introduced by the Indian government to collect taxes at the source of income.

• It is a method of deducting tax from payments made by individuals or companies.

• The person or entity making the payment is responsible for deducting the tax and depositing it with the government.

• TDS is applicable to various types of income such as salaries, interest, rent, professional fees, etc.

• The deducted tax amount is then credited to the accou...read more

pH and TDS are important parameters to test in water treatment. COD and TSS limits vary depending on the type of water.

• pH measures the acidity or alkalinity of water. Normal water pH is around 7.

• TDS (Total Dissolved Solids) measures the amount of inorganic and organic substances in water. Normal TDS limit for drinking water is 500 ppm.

• COD (Chemical Oxygen Demand) measures the amount of oxygen required to oxidize organic matter in water. COD limit varies depending on the type ...read more

The plant capacity of an ETP refers to the maximum amount of wastewater it can treat within a given time period.

• Plant capacity is typically measured in terms of flow rate, such as gallons per minute (GPM) or cubic meters per hour (m3/h).

• It is important to consider the influent characteristics and treatment requirements when determining the plant capacity.

• For example, an ETP may have a capacity of 500 GPM, meaning it can treat up to 500 gallons of wastewater per minute.

• The pla...read more

ETP stands for Effluent Treatment Plant.

• ETP is a wastewater treatment plant used to treat industrial effluent.

• It removes pollutants and contaminants from the wastewater before releasing it into the environment.

• ETP uses various processes like physical, chemical, and biological treatment to purify the water.

• Examples of industries that use ETPs are textile, pharmaceutical, and chemical industries.

The TDS of the inlet tank refers to the Total Dissolved Solids present in the water entering the tank.

• TDS is a measure of the combined content of all inorganic and organic substances dissolved in water.

• It is typically expressed in parts per million (ppm) or milligrams per liter (mg/L).

• The TDS of the inlet tank can vary depending on the source water and any treatment processes it has undergone.

• High TDS levels can indicate the presence of minerals, salts, or other contaminants ...read more

The chemical dose in ETP plant depends on the type of wastewater and the treatment process used.

• The chemical dose is determined based on the characteristics of the wastewater being treated.

• Common chemicals used in ETP plants include coagulants, flocculants, and disinfectants.

• The dosage of chemicals is adjusted based on the effectiveness of the treatment process.

• Chemical dosing is an important aspect of ETP operation to ensure efficient and effective treatment of wastewater.

ETP plant stands for Effluent Treatment Plant, which is used to treat industrial wastewater before it is released into the environment.

• ETP plants are designed to remove pollutants and contaminants from industrial wastewater to ensure it meets environmental regulations.

• Common treatment processes in ETP plants include physical, chemical, and biological methods.

• Examples of pollutants removed in ETP plants include heavy metals, organic compounds, and suspended solids.

• Effluent tre...read more

COD, MLSS, and MLVSS are terms used in wastewater treatment. COD measures the amount of organic pollutants, while MLSS and MLVSS measure the concentration of suspended solids.

• COD stands for Chemical Oxygen Demand and is a measure of the amount of organic pollutants in wastewater.

• MLSS stands for Mixed Liquor Suspended Solids and represents the concentration of suspended solids in the mixed liquor of an activated sludge process.

• MLVSS stands for Mixed Liquor Volatile Suspended S...read more

MLSS growth can be achieved through proper monitoring and adjustment of key parameters.

• Monitor MLSS (Mixed Liquor Suspended Solids) concentration regularly

• Maintain a balanced food to microorganism ratio

• Control the dissolved oxygen levels

• Adjust the sludge retention time

• Optimize the aeration and mixing process

• Implement proper waste sludge management

• Ensure adequate nutrient availability

• Consider using bioaugmentation techniques