This Slideshare is about a presentation by Srinivasan Sekar in the Water Workshop for Apartments, on 21-June-2014.The limelight of the day’s seminar was the case study presentation of TZED Homes from Whitefield, Bangalore.
"Winner of ApartmentADDA’s first Rise High Award, for sustainable water management; this amazing community called Tzed Homes which is 100% sustainable".
They do not use any tankers, they just use 2 bore wells, recharging the same amount of water withdrawn, into the ground again. Amazing right? And who else is best suited to talk about it than Mr. Alok Kuchlous and Mr. Srinivasan Sekar from TZED Homes, who spearheaded a series of changes in their community to achieve this amazing feat. Being in Bangalore, which is known for its woes regarding water, where majority of water needs in apartments are met by supply through water tankers, this “Rockstar” apartment’s achievement is really exemplary.
How did TZed Homes actually convert Sewage water to Drinkable Water?
http://apartmentadda.com/blog/blog/2014/10/15/water-conservation-workshop-blog-series-chapter-2-water-positive-tzed-ho/
ApartmentADDA: Sewage to Potability - Water Conservation workshop on Tzed Homes
1. Sustainability for a Greener
Planet
Sewage to Potability: The How of
Transformation
Srinivasan Sekar
Owner at Tzed Homes
Founder CEO and Managing Director,
TerraCura Solutions Private Limited
Srinivasan.sekar@terracura.in
Ph: 9900102008
Presented at Workshop conducted by:
2. Sustainability for a Greener
Planet Key Essentials of Civilized
Living
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Presented at Workshop conducted by:
3. Sustainability for a Greener
Planet Water and Waste Water – the Twin
Challenges of Urban India
Urban Water Supply is a perennial problem for
all city Governments, Residences, Businesses...
Sewage Treatment is still a major challenge for
high-rise buildings, industries and city
governments.
– How to sustainably treat waste
– What to do with water extracted from waste
– What to do with sludge from waste
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Presented at Workshop conducted by:
4. Sustainability for a Greener
Planet TZED Homes – The
Challenges in 2012
The Problem:
• Summer of 2012 – Severe Water Shortage; campus had 3 shallow borewells (250-
300 feet deep), which had been providing water from 2006-12 (6 years) and
suddenly dried up.
• 10 tankers of water every day was still not sufficient for 24X7 water.
Design Constraints and Existing Condition:
• Campus Plumbing done such that same pipes that fed water to toilet flushes in
one level were connected to kitchen sink in another level; each house had 5 to 7
inlets, making it impossible to do re-plumbing without a lot of destruction and
hardships.
• Campus had centralized RO system that supplied 70-90KLD water for all needs
except for carwash and garden.
• Sewage Treatment Plant was newly repaired after severe malfunction, and there
was a wealth of knowledge in the campus due to the renewal on maintenance of
STP.
• Campus had a 4-lakh Litre Rainwater tank, but the RWH was partially implemented
and not effective; General Body gave full support to fix the Rainwater Harvesting
System to harvest rain water in the 4-Lakh Litre sump.
4Copyright 2014
Presented at Workshop conducted by:
5. Sustainability for a Greener
Planet WATER SET UP IN TZED in 2012 –
before the changes
Terrace Water
piped down
Recharge Wells
Central Road
Rainwater
Car Wash Drain
Coarse
Filters
(not
maintaine
d)
Coarse
Filter
4Lakh Liter Rainwater
Tank
RO System
STP 4-stage
Treatment Plant
Bor
ewe
lls
Water
Tankers
To Homes
From Homes
To Gardens and
Car Wash 5Copyright 2014
Presented at Workshop conducted by:
6. Sustainability for a Greener
Planet
Water Statistics
• 94 homes/families live in 5 acre campus with plenty of gardens and trees.
• Average consumption per home (4 people average) ranged from a low of 400 to a
high of 1000. Target average for the entire community was 500 L per home.
• R/O water pumped was 60,000 LPD and went upto 80,000 LPD. This resulted in
investigation and fixing of leaks both within apartments and in some pipelines.
Current average pumping is about 50,000 LPD. R/O Reject is around 30,000 LPD.
Total water requirement is between 80,000 LPD and 90,000 LPD.
• STP treated water averages to about 30 KLPD to 40 KLPD.
• Initial state was that R/O Reject water was discarded in storm water drains, or
mixed with STP treated water and sent to recharge wells. STP treated water was
used for gardens and car wash and excess was sent to recharge wells (over 44+
wells across the 5 acre campus).
• Goal was to recover as much water for repeated use, and send only excess to
recharge wells. 6Copyright 2014
Presented at Workshop conducted by:
7. Sustainability for a Greener
Planet
Solution Approach
• Harvest Rain water – 4 Lakh Liter sump existed
already.
• Creatively reuse waste water – RO Reject
water was sizeable and was being let into
storm water drains.
• Excess STP-treated water (beyond garden use
and car wash) was being let into recharge
wells.
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Presented at Workshop conducted by:
8. Sustainability for a Greener
Planet
Solution Approach – cont’d
Key Approaches that contributed to the project
success were:
• Communication – Transparency, Repeated and
open approach, Use of data for discussions
• Scientific Basis – Research, Pilot, Prototype, Scale
• Team Inclusiveness – Bring everyone into the
fold; use collaboration for solutions; incorporate
suggestions from many
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Presented at Workshop conducted by:
9. Sustainability for a Greener
Planet
DRAFT 1: RAINWATER HARVESTING
ONLY
Terrace Water
piped down
Recharge Wells
Central Road
Rainwater
Car Wash Drain
Coarse
Filters
(not
maintaine
d)
Coarse
Filter
4Lakh Liter Rainwater
Tank
RO System
STP 4-stage
Treatment Plant
Bor
ewe
lls
Water
Tankers
To Homes
From Homes
To Gardens and
Car Wash
3-stage
Filter
-Coarse
-Charcoal/
Sand
-Softening
Recommen
ded
Alternate
To Recharge Wells
Excess
9Copyright 2014
Presented at Workshop conducted by:
10. Sustainability for a Greener
Planet
DRAFT 2: INCLUDE TREATED STP
WATER
Terrace Water
piped down
Recharge Wells
Central Road
Rainwater
Car Wash Drain
Coarse
Filters
(not
maintaine
d)
Coarse
Filter
4Lakh Liter Rainwater
Tank
RO System
STP 4-stage
Treatment Plant
Bor
ewe
lls
Water
Tankers
To Homes
From Homes
To Gardens and
Car Wash
3-stage
Filter
-Coarse
-Charcoal/
Sand
-Softening
Recommen
ded
Alternate
To Recharge Wells
Excess
10Copyright 2014
Presented at Workshop conducted by:
11. Sustainability for a Greener
Planet
FINAL IMPLEMENTATION
STP Treatment
Plant
Sand Filter
Carbon
Filter
Chlorine
Sand Filter
Activated
Carbon
Filter
Ozonizer RO System
Rain
water
4 Lakh L Tank
Borewell/
Tanker
water
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Presented at Workshop conducted by:
12. Sustainability for a Greener
Planet
TZED TODAY
• STP Treated Water consistently tested better quality than tanker
and bore well water in all aspects.
• Primary use of STP treated water is for garden and car wash.
• RO Reject water mixed with STP treated water and used for
gardens, car wash and house keeping (common area mopping, etc).
• Use of RO Reject water reduced need of STP treated water; balance
is mixed with rainwater and borewell water and reused in the RO
system. 30% reduction in water needs for the campus, resulting in
complete stoppage of tankers.
• Constant education on water conservation led to fixing of all leaks,
water efficient flushes installed in homes, and re-plumbing of worn-
out pipes with leaks.
• RO water still of the same quality even with STP treated water
through additional redundant filters, as it was with only borewell
and tanker waters.
12Copyright 2014
Presented at Workshop conducted by:
13. Sustainability for a Greener
Planet
Water Conservation
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Presented at Workshop conducted by:
14. Sustainability for a Greener
Planet
QUESTIONS?
Thank You for your attention.
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Presented at Workshop conducted by: