Unichem Laboratories Interview Questions, Process, and Tips

The Factory Act is a UK law that regulates working conditions in factories.

• The act was first introduced in 1833 and has been updated several times since then.

• It covers issues such as working hours, health and safety, and child labor.

• The act requires employers to provide a safe working environment and to ensure that machinery is properly maintained.

• It also sets out rules for the employment of women and children, includi...read more

ZLD compliance requires a comprehensive approach to wastewater management.

• Implementing advanced treatment technologies to reduce wastewater volume and contaminants

• Reusing treated wastewater for non-potable purposes

• Ensuring proper disposal of residual solids

• Complying with local regulations and obtaining necessary permits

• Regular monitoring and reporting of wastewater quality and discharge

• Training employees on proper hand

We have used non-toxic and biodegradable cleaners in RO.

• We prioritize the use of non-toxic and biodegradable cleaners to minimize environmental impact.

• Examples of cleaners we have used include citric acid, hydrogen peroxide, and vinegar.

• We avoid using harsh chemicals that can damage the RO membrane or contaminate the water.

• We follow manufacturer's recommendations for cleaning frequency and procedures.

• We ensure proper d...read more

RO cleaning frequency depends on various factors such as feed water quality, usage, and maintenance schedule.

• RO cleaning frequency should be determined based on the feed water quality and usage.

• RO systems should be cleaned regularly to prevent fouling and scaling.

• Maintenance schedule should also be considered when determining RO cleaning frequency.

• RO cleaning frequency can range from every 3 months to once a year depen...read more

ETP flow diagram and input/output parameters

• ETP stands for Effluent Treatment Plant

• The flow diagram includes primary, secondary and tertiary treatment processes

• Input parameters include pH, temperature, BOD, COD, TSS, oil and grease

• Output parameters include pH, TDS, TSS, BOD, COD, oil and grease

• The treated water is discharged into a nearby water body or reused for non-potable purposes

Common problems in ETP include inadequate treatment, high sludge production, and equipment failure.

• Inadequate treatment leading to discharge of untreated or partially treated effluent

• High sludge production leading to increased disposal costs

• Equipment failure due to poor maintenance or improper operation

• Chemical imbalance leading to poor treatment efficiency

• Lack of skilled personnel leading to improper operation and mai

MEE is a process used to treat wastewater by evaporating water and leaving behind concentrated pollutants.

• MEE stands for Multiple Effect Evaporation

• It involves heating the wastewater in multiple stages to evaporate water and concentrate pollutants

• The concentrated pollutants are then disposed of or treated further

• MEE is commonly used in industries such as chemical, pharmaceutical, and food processing

• It is an effective w...read more

MEE choke ups regularly due to various reasons

• Inadequate maintenance

• Improper operation

• Scaling and fouling

• High inlet steam pressure

• Low feedwater flow rate

• Poor quality of feedwater

• Excessive dissolved solids in feedwater

• Corrosion and erosion

• Design flaws

• Inadequate monitoring and control

• Inefficient steam traps

• Inadequate insulation

• Improper venting

• Inadequate preheating

• Inadequate chemical treatment

• Inadequate blowdown

• Inadequate...read more

Hazardous area classification is the process of identifying and categorizing areas where explosive atmospheres may occur.

• It involves assessing the likelihood of explosive atmospheres based on the presence of flammable gases, vapors, or dusts.

• The classification system is based on the frequency and duration of the hazardous atmosphere.

• Different types of equipment and protective measures are required for each classificati...read more

Ethylene oxide should be handled with extreme caution due to its high toxicity and flammability.

• Use appropriate personal protective equipment (PPE) such as gloves, goggles, and respirators

• Store ethylene oxide in a cool, dry, and well-ventilated area away from sources of ignition

• Handle ethylene oxide in a fume hood or other well-ventilated area

• Avoid skin contact and inhalation of vapors

• In case of a spill, contain the ar...read more

Reduce ammonical nitrogen in ETP by optimizing pH, aeration, and using biological treatments.

• Optimize pH levels to reduce ammonical nitrogen

• Increase aeration to promote biological activity

• Use biological treatments like activated sludge process or biofilters

• Regularly monitor and maintain the ETP system

• Implement source control measures to reduce nitrogen input

• Consider using chemical treatments like ion exchange or revers...read more

Water balance details and reducing water consumption are important for environmental sustainability.

• Water balance details involve measuring the amount of water used and discharged in a facility.

• Reducing water consumption can be achieved through implementing water-efficient technologies and practices.

• Examples of water-efficient technologies include low-flow fixtures, rainwater harvesting systems, and water recycling sys...read more

Acid is stored in glass containers instead of iron containers to prevent chemical reactions that could contaminate the acid or cause dangerous reactions.

• Glass is non-reactive with most acids, preventing contamination of the acid.

• Iron containers can react with acids, leading to the formation of potentially dangerous byproducts.

• Glass containers are more chemically inert and do not corrode when in contact with acids.

• Using...read more