ethos water design competition aditi.b, varshapriya.r,sid,pune
TRANSCRIPT
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Water, safe, sustainable and for all - Design Competition
Presented by-Aditi BidkarVarshapriya RadhakrishnanSymbiosis Institute of Design, Pune.
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A device that recycles waste water in small scale industries.
Design Brief
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Design process
-Current situation
-On site research
-Final concept
-Description of various components
-Unique features of the concept
-In a nutshell
-Bibliography
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Current situation.
Number of industries which recycle water is negligible.
People who recycle water are--Big industries who can afford the setup.-Industries who are aware of their environmental duties.-Industries which deal in export - to impress foreign clients.
Water is poorly priced natural resource in India .Which leads to using it recklessly and abusing it.
Poor laws and regulations and lack of coordination between regulatory bodies worsen the water crisis.
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On an average, for every litre of wastewater discharged, about 5-8 litres of water are made unusable for most human uses other than agriculture, hydropower and navigation.
If this logic is followed, current water use by Indian industry is somewhere between 35-50 per cent of the total water used in the country.
An integrated approach involving water treatment, source reduction, reuse of process water, effluent treatment, recycling of treated effluent and Waste minimization is urgently required.
-Improve process technology-Reuse process water-Recirculate process water-Rainwater harvesting
Current situation.
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On site research
Areas visitedSmall scale Industries around Katraj, Pune.
Area chosen-Zinc plating unit near Katraj, Pune.
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Pictures taken from the site
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Pictures taken from the site
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A compact device that recycles waste water in small scale industries.
Redefine brief
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- Lack of awareness about environmental issues.
- Lack of space for a recycling plant.
- Lack of financial resources.
- Corrupt government system.
- Present cost of water is cheap. 250 Rs. for 12,000lts of water.
- All the water being used is thrown away (i.e.1000lts per day.)
Problems identified
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Plan of the area
Highway
Garage
Furniture manufacturer
Zinc plating unit
Vehicle parts
Vehicleparts
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Plan of the site chosen
Water tank Electrolysis unit
Electrolysis unit
Curre
nt su
pply
Empty space
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Areas that can be worked on
Area chosen
Areas that can be worked on
Ground
Road
Industrials units
1
2
3
4
3
Area chosen for working
Advantages -Within the premises of the unit- Easy accessibility
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Process
Electrolysis takes place in two tanks (capacities - 450lts and 300lts).
Additional tank stores fresh water of 300lts.
The effluent is pumped by means of a hose into the treatment tank.
Water tank Electrolysis unit
Electrolysis unit
Curre
nt
supply
Treatment tank
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Filter
Process storage tank
Mixer
Precipitation
Neutralizers
Precipitants
Processed water + electrolyte
Solid waste
Sludge
Buffer tank
Flowchart
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Processes and Functions
Filtration screen – Removes any solid particles when the electrolytic solution is passed through it.
Agitation– Agitates the process of neutralization.
Neutralization -chemical neutralization is done to neutralize the acidic or alkaline nature of water.Neutralizer is added to form salt and water.
Precipitation - Precipitation reactions can be used forremoving salts from water. Precipitant is added to form solid precipitate which settles down.
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Concept
motor
agitator
Sludge outlet
platformelevation
handle
InletFor adding chemicals
Filterscreen
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Concept
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Parts
Tank
Size : 190.5cm * 160cm *76.2cmElevation of around 50 cm from the base.
The base is slanted so that the sludge comes out easily.
Material: stainless steel-316 10 gauge
Cost: approx Rs.65,000.
Maintenance: The tank can be easily cleaned. Also because of its elevation from the ground any leakage problem can be easily solved.
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Fine bar screen
Parts
The water first passes through a fine bar screen so that any solid waste in the electrolyte can be removed.
Hole is provided at one of the corners to put neutralizers and precipitants in the tank.
Material: Stainless steel -316 mesh.
The fine bar screen can be moved to an angle with the help of the handle. Moving it to angle helps in cleaning fine bar screen.
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Motor + Propeller
Parts
Flameproof motor of 1 hp.
Mounted on the tank.
Propeller
Cost: motor + Propeller Rs.15,000
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Parts
Sludge and water outlet
Platform
Total cost:Tank + Propeller + motor + filter screen+ pipes +installation= approx Rs.90,000
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Unique features
-Compact system.
-Simple system.
-Less cost of installation.
-Easy maintenance.
-Easy to clean. -Easy accessibility (throughout the working hours) as it is within the premises of the unit.
Even though this has been designed for a zinc plating unit, the same compact system can be installed in any other similar industry.
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In a nutshell…
There are enough technologies to solve all water problems and what is more,the prices of these technologies are gradually decreasing.
With government support and stringent regulations, the journey towards thisgoal will be smoother.
In a nutshell, it is quite feasible today for an Indian industry to substantiallyreduce its water consumption and wastewater discharge by putting efficientsystems for recycling and reusing the process water.
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Bibliography
http://en.wikipedia.org/wiki/Wastewater
http://www.lenntech.com/Centrifugation.htm
http://www.waterquality.crc.org.au/consumers/Consumersp8.htm
http://www.cseindia.org/dte supplement/industry20040215/
http://en.wikipedia.org/wiki/Industrial_water_treatment
http://en.wikipedia.org/wiki/Neutralization_%28chemistry%29
http://www.lenntech.com/electrolysis.htm
http://www.vito.be/english/researchfields.htm
http://www.kochmembrane.com/Industrial Processes/Industrial Water & WasteWater.htm
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Acknowledgement
Owners of all small scale industries that we visited.
Mr. Aniruddh Natu, associate director , SID
Mr. Mlinesh Shah, B.E,chemical engineer
Mr. Sandeep Marne, Diploma Mechanical engineer
Mr. Prashant Walvekar, B.E , chemical engineer
Dr. Milind Deshpande ,Phd (dyes and chemicals)
Mr. Govind Sharma,MBA
Mr. Nabar. B.E mechanical engineer
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Thank you