ACKNOWLEDGEMENTSTo prepare this text, several people have helped me. It is my pleasure to express my gratitudeto all of them. First of all I want to thank Mr.A.Sathish Kumar, TSO, Hindustan unilever-Water Div, Krishnagiri, who gave me the opportunity to do internship in one of the world’s prestigious organization. My grateful thanks to Mr.J.Samson Selvakumar, TSO, Hindustan unilever-Water Div, Coimbatore, who initiated and encouraged me to prepare this text. Mr.Sesha, CCO, Hindustan unilever-Water Div, Coimbatore, who directed me in the right path to prepare this text. I am grateful to him. My sincere thanks to Mr.R.Sridhar, Symphony Supervisor, Hindustan unilever-Water Div, Coimbatore, for training me and giving me a wonderful experience. I thank him for answering my queries patiently. Last but not least my hearty thanks to Dr.R.Nanda Gopal, Director, PSG Institute Management. and Deepa Ranganathan Assistant Professor PSG Institute of Management. Saravanan Ragothaman +91-9003881369 firstname.lastname@example.org
A Reference text for PWE, Pureit PSG Institute of Management Coimbatore - 641 004
CONTENTS 1. PUREIT MARVELLA RO Key Features Reverse Osmosis Process Overview 5 Purification Stages Sedimentation Filter Carbon Filter Triple safety assurance Highest Level of TDS Removal RO Purity Lock System Advance Alert System Large 9 liters Storage Tank Break Resistant Tap Voltage Fluctuation Guard Water Flow Comparisons 2. PUREIT MARVELLA UV Features UV Technology How UV rays work on harmful microorganisms 3 Stage Purification process Pre Filter Mini Filter UV Exposure Water Flow Diagram Comparisons
Reverse Osmosis: Osmosis is the natural tendency of water with a low concentration of dissolved particles (purewater) to move across a semi-permeable membrane to an area of water with a high concentration ofdissolved particles (water with high TDS).When it happens in viceversa then it is called Reverse Osmosis.Fig. 1: Initially the level of dilute solution will be high and the level of concentrated solutionwill be low. As stated earlier, due to Osmosis process, dilute solution is trying to move throughmembrane towards concentrated solution. But membrane will allow only water (H2O) and actas a barrier for other molecules. Therefore the water (H2O) in the dilute solution is movingcontinuously to concentrated solution.Fig. 2: After a while the water arrives at the concentrated solution side and other moleculeslike virus, bacteria stay in the dilute solution side. So the level of concentration solutionincreases.
Fig. 3: After Osmosis process, we have to apply external pressure on the concentrated solutionside to achieve Reverse Osmosis process. Due to high pressure on top of the concentrated solution side the contents inside theconcentrated solution like water, salt, virus and bacteria and other impurities try to escape todilute solution side through the membrane. But membrane allows only water and keeps othercontents in concentrated solution side. This process continuously happens until the pressurelevel equals to the level increased in concentrated solution (Fig 2).Fig. 4: Then finally we will get the figure as same as fig. 1. After Osmosis we may remove thewaste water from dilute solution side and can do Reverse Osmosis process. If we do like thisway, we can get purified potable water in the dilute solution side at the end of the process.
PROCESS OVERVIEW : Feed solution containing ions, organics and impurities like microorganism, salt etc. is fedinto the spiral wound membrane element. In the output side there are two types namedpermeate and concentrate. Permeate part carries pure water and concentrate part carriesbrine and other impurities.
The above figure shows how Water molecules get separated from other molecules (salt,micro organic etc.).The feed channel spacer allows feed solution to pass through it. But theoutside of feed channel spacer is covered by membrane. The membrane has a number of holesof size about 0.0001 μm. So the water can only escape through that holes and other particlespasses straightly and get out as waste water
5 Purification Stages: It is an advanced 5 stage purification technology comprising of Pre SF + CF + Post SF +RO + UVM which ensures 100% pure and safe water.Sedimentation Filter (pre + post): It is used to remove suspended material like sand, mud, silt (small rocks) etc.Carbon Filter: Removes harmful parasites and pesticides It is also most effective at removing volatile organic compounds (VOCs) i.e organic chemicals like chlorine from water Removes unwanted color to give clean water Removes foul odour
Triple safety assurance: Pureit Marvella RO is powered with RO, UVM and ROPL which purifies the water notonce but twice, ensuring you always get only 100% pure drinking water.Highest Level of TDS Removal: Pureit Marvella RO removes dissolved impurities in water like heavy metals, rust andexcess salts to turn hard water of upto 2000 PPM into soft and tasty water.RO Purity Lock System: It is the added unique feature of Pureit Marvella RO to lock the RO membranewhen its purifying power is over. It ensures that you never have unsafe water.Advance Alert System: This unique feature gives you 4 different warnings including a 15-day advance warningbefore the RO membrane shuts off.Large 9 litres Storage Tank: Pureit Marvella RO has 9 litres of storage tank. So you dont need to fill water in vesselsor water bottles.Break Resistant Tap : Fitted at a height to ensure easy filling of bottles and tested upto 50,000 times for breakresistance.
Voltage Fluctuation Guard: This protects your purifier from sudden voltage fluctuation from as low as 130 volts toas high as 230 volts.Water Flow: First the input water is fed into sediment filter to remove suspended material like sand, mud, silt (small rocks) etc. The output of sediment filter is given to low pressure switch (LPS).The LPS checks whether the input pressure is in the range between 5-10 psi. If the pressure is in the range then the water is transformed into carbon filter. In the carbon filter it removes harmful parasites and pesticides are removed. It also removes odor and unwanted color in water. Then this water is given to post sediment filter to remove remaining suspended materials to make sure that there are no suspended material inside the input water of RO membrane. The pump is used to pump the water to forward direction. There are two water outputs from RO membrane. One is purified water which is going to storage tank and another one is brine water which is ejected as waste water.Comparisons:
Specifications Pureit Marvella RO Kent Aquasure Spring Super+ fresh DX RO Image Price 13,500 14150 14999 Storage 9L 8L 8L Capacity Purification 5 stage 4 stage 5 stage Stage Secondary Yes Yes Purification Ultra Ventilation Ultra filtration NA Membrane MembraneRO Membrane& Filter change Yes NA NA Alarm 15 dayAdvance alert Available NA NA system Weight 8.3 kg 7.3 kg 9.5 kg Food Safe,Non-Toxic, Using ABS Plastic Using ABS Plastic only Material of Engineering-Grade ABS only Body Plastic
TDS Removal Level Upto 2000 ppm Upto 2000 ppm Upto 2000 ppmRO Purity Lock Available NA NA SystemWater tank full electrical Available NA NA indicationGlass holding Available NA Available facility Break Resistant Tap Tap tested upto 50,000 Ordinary tap Ordinary tap times for break resistance. Voltage Available Fluctuations Available NA Guard Information couldn’t get Purification Information couldn’t 15 liters/hour Capacity get Tenure of 4000 liters 3000 liters Carbon &Sediment Filter Information couldn’tTenure of RO 8000 liters get 6000 liters Membrane Warranty 1 year Replacement 1 year Ordinary 1 year Ordinary Warranty Period warranty Warranty SAFETY 1 crore safety NA NA CHALLENGE challenge- Unclaimed for 2 years
PUREIT MARVELLA UVFeatures: UV technology 4 L storage Wall mounting Input voltage 12VDC Outside Adaptor – 12VDC supply to device Auto-shutoff mechanism for battery Advanced alert system LED display Microprocessor controlled battery life Battery Kit – Pre filter – 3000L Working pressure range 5-30 psi
UV Technology: Ultra-violet (UV) treatment is the process of passing water in front of a special lightsource. The special light source emits UV waves that can inactivate harmful microorganisms.This method of treatment is growing in popularity because it does not necessarily require theaddition of chemicals.How UV rays works on harmful microorganisms: Naturally, Sun has UV rays which have power to inactivate (Note: UV rays do not kill)harmful microorganisms. Here, the UV lamp is used to produce UV rays which is similar to therays produced by the sun, but stronger. These rays alter the Deoxiribo nucleic acid (DNA) ofviruses, bacteria, molds or parasites, so that they cannot reproduce and are made inactivate.UV treatment does not alter the water chemically. Because we are not using any chemicals likechlorine to kill the microorganisms. It should be noted that inactivated microorganisms are notremoved from the water. UV treatment does not remove dirt and particles, metals such as leador iron, or hard minerals such as calcium. So here we are using two different types of filternamed Pre filter and Mini filter to remove particles, metals and minerals.
3 Stage Purification process: Pre filter Mini filter UV ExposurePre Filter: It is used to remove suspended material like sand, mud, silt (small rocks) etc.Mini Filter: It is like pre filter. It is also used to remove sand, mud and makes sure that no suspendedmaterial will enter into the UV purification stage and purify water not once but twice.UV Exposure: Here the suspended material free water is exposed to UV rays through Quartz tube.Water Flow Diagram: First the unpurified input water is given to low pressure switch to check if the pressurelevel is in between (5-30) psi. If the pressure level is in the range then the water will go to prefilter. Pre filter removes suspended materials. The output of the pre filter is given to mini filter.It also removes suspended materials to make sure that the input of UV exposure does not
contain suspended particles. The UV lamp is placed inside the Quartz tube. It acts as a mediumbetween water and UV lamp. So that it protects direct exposure of UV rays on water. This typeof filtration is the best in UV filtration. The input of UV exposure is controlled by flow resister.Flow resister is used to control the water flow inside the UV exposure. So that it maintains theflow rate about average of 650 ml. Because of this, UV rays can inactivate all the harmfulmicroorganisms inside the water. Then the output of UV exposure is given to storage tank todrink.Comparisons:Specifications Pureit Marvella UV Kent Maxx Aquasure Crystal Image Price 7990 7950 8499 UV lamp High Intensity 11 11 watts 8 watts watts Storage Facility Available Available NA Advanced Alert Available NA Available System Input Voltage 12 VDC (160-300) VAC (130-270) VAC Tank Full Indicator Available NA NA Tap Break Resistant Tap tested upto 50,000 Ordinary tap Ordinary tap times for break resistance. Voltage Available NA AvailableFluctuations Guard Flow Resistor Available NA NA Material of Body Food grade, non – Food grade, non – ABS plastic breakable, breakable, transparent construction transparent ABS ABS plastic plastic construction construction Safety Lock Available Available but not Available Automatic
Purification Information couldn’t 60 Information couldn’t Capacity(l/hr) get getPurification Stage 3 3 3 Colors Available Information couldn’t White White get Weight in kg Information couldn’t 6.1 6.5 getQuartz Filtration Available NA Available Medium Manual No need No need Need manual flush Maintenance frequently UV Fail Alarm Available Available NA Control Microprocessor Computer control Electronic monitor control Certification Meets USEPA Does not meet USEPA Does not meet USEPA standards Standards standardsSafety Challenge 1 crore safety NA NA challenge- Unclaimed for 2 years
PUREIT ADVANCEDFeatures: Advanced Auto-Shut-off Advanced 4 stage purification process Germ kill life indicator Double Protection Meets the standard of Environmental Protection Agency (EPA), USA, for harmful virus & bacteria removal. Does not require a tap connection low maintenance Total capacity is 23 liters. Purified storage capacity is 9 liters Stylish sleek design
4 Stage Purification:Advanced Microfiber Mesh: Removes visible dirt like sand, mud and metallic impuritiesCarbon Polisher: Removes harmful parasites, pesticides and chlorine, making the water clear, odorlessand natural tasting
Germ kill Processor: Uses ‘programmed Germ kill technology’ to target and remove harmful viruses andbacteriaMicrocharged Membrane: Purifies the water again and removes harmful parasites giving the assurance of doubleprotection.Comparisons: Specifications Pureit Advanced Kent Crystal Aquasure Amrit Image Price 2800 3150 2499 Purification Stage 4 stages 4 stages 4 stages Storage Capacity 23 liters 15 liters 20 litersPurification Capacity 1500 liters 4000 liters 750 liters .350Germ Kill Life Available NA NAIndicator Food safe, non-toxic, ABS food-grade Food Grade, Non-Toxic Material of Body engineering plastics plastic engineering Plastics Auto-Shut-off Available NA NA Double Protection Available NA NA
Break Resistant tap Tap tested upto 50,000 Ordinary tap Ordinary tap times for break resistance. Certification Meets USEPA Does not meet USEPA Does not meet USEPA standards Standards standards Colors Available Information couldn’t Sky Blue White-Sky getWeight in kg 3.7 4 2.710 Safety Challenge 1 crore safety NA NA challenge- Unclaimed for 3 years