Rochem Separation Systems Interview Questions, Process, and Tips

PPM of dosing can be calculated by dividing the weight of the solute by the weight of the solution and multiplying by 1,000,000.

• Calculate the weight of the solute (in grams)

• Calculate the weight of the solution (in grams)

• Divide the weight of the solute by the weight of the solution

• Multiply the result by 1,000,000 to get the ppm

Aerobic and anaerobic digesters are systems used to break down organic matter. FM ratio is the ratio of food waste to microorganisms in the digester.

• Aerobic digester uses oxygen to break down organic matter, while anaerobic digester operates without oxygen.

• Aerobic digesters are faster but require more energy, while anaerobic digesters are slower but more energy efficient.

• FM ratio (Food to Microorganism ratio) is the ra...read more

Yes, I have extensive experience in pump and motors as well as electrical components.

• I have worked with various types of pumps and motors, including centrifugal pumps and induction motors.

• I am familiar with troubleshooting and repairing electrical components such as circuit breakers and control panels.

• I have experience in conducting preventive maintenance on pumps and motors to ensure optimal performance.

• I have knowled...read more

I have 5 years of experience in the construction industry with a salary range of $50,000 to $70,000.

• 5 years of experience in construction industry

• Salary range between $50,000 to $70,000

• Familiar with industry standards for compensation

• Negotiated salary increases based on performance

• Received bonuses for meeting project deadlines

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

• ETP removes contaminants from wastewater through physical, chemical, and biological processes.

• It helps in reducing the pollution load in water bodies by treating industrial effluents.

• Common processes in ETP include screening, sedimentation, biological treatment, and disinfection.

• ETP plays a crucial ro...read more

Designing an ETP involves determining the required treatment processes, sizing the equipment, and ensuring compliance with regulations.

• Identify the type and volume of wastewater to be treated

• Select appropriate treatment processes such as physical, chemical, and biological

• Size the equipment based on the flow rate and characteristics of the wastewater

• Consider factors like space availability, budget, and regulatory requir...read more

Parameters to check in ETP include pH level, temperature, turbidity, dissolved oxygen, and chemical dosing.

• pH level

• Temperature

• Turbidity

• Dissolved oxygen

• Chemical dosing

COD is Chemical Oxygen Demand, BOD is Biochemical Oxygen Demand, FM ratio is Food to Microorganism ratio.

• COD is a measure of the amount of oxygen required to chemically oxidize organic matter in water.

• BOD is a measure of the amount of oxygen required by microorganisms to break down organic matter in water.

• FM ratio is the ratio of food (organic matter) to microorganisms in a biological treatment system.

• Example: A high C...read more

Achieving final water parameters involves proper testing, treatment, and monitoring.

• Perform regular water testing to monitor parameters such as pH, chlorine levels, and turbidity

• Adjust treatment methods based on test results to maintain optimal water quality

• Implement proper filtration systems to remove impurities and contaminants

• Regularly monitor and maintain equipment to ensure efficient operation

• Train staff on proper