An Appropriate Technological Solution for Sewage
Treatment -

Decentralized STPs

Workshop cum Training program on Promoti...
WATER : What is the issue?
• Economic growth : without
corresponding infrastructure

• Urbanization
– Increasing density o...
WATER : Next issue!
• Sources of water drying up
• A larger issue coming up –
– Contamination of Water Sources

• The way ...
Report Summary
• Citizens’ Seventh Report on the State of India’s Environment,
“Excreta Matters: How urban India is soakin...
How big is the waste water problem?
• Total sewage water in Class I and II Cities India
– 38254 MLD
– Only 11787 MLD (35%)...
What is “Decentralized” sewage treatment?
• Current system : sewage is the
responsibility of the Government
/ public autho...
Recognize and manage Sewage
• Recognize and manage Sewage :
78 % officially not treated and let
out into rivers, lakes, gr...
Why Decentralized ? Local benefits!
• On-site treatment and
discharge
– Reduces load on existing
sewage system
– Local tre...
Urban reuse of water
• Current cycle :
– Ground water -> Usage -> Sewer system
-> Water bodies/environment disposal
UNSUST...
Average water consumption Per person
Drinking
Cooking
Total

5
5
10

7%

Bathing
Washing Clothes
Utensils washing
Total

5...
ONE IMMEDIATE SOLUTION
RECYCLE WATER
At least 40 % of Water usage in urban areas – flushing /
landscape maintenance / faci...
Enzotech Solutions : Credentials
• Started in 2006
• ISO 9001:2008 certified company

• Strong client roster – testimony t...
An illustrative Case Study –
Office complex, Chennai
Office complex – reuse for flushing
• Office on Velachery Road
• Around 300 people – daily consumption of around
12,000 Li...
Office complex : progress
Final position – STP with recycling system
The Enzotech treatment process
• To trap large objects
Bar Screen

Sewage
treatment

Tertiary
treatment

Treated
water

• ...
Water treatment and recycling in a
hospital
Issues faced by hospital
• Sewage generated was clogging up sewage lines
• Water consumption of 4.5 Lac Litres per day
• S...
Hospital installation
Right next to the car park…
EnzoMBBR system
A typical EnzoMBBR plant – with
Fibre Reinforced Plastic (FRP) tanks
Thank you
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Decentralised STPs_ Ramprasad_2013

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An excellent overview of decentralised Sewage Treatment Plants and their importance & utility.

Published in: Education, Technology, Business
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Decentralised STPs_ Ramprasad_2013

  1. 1. An Appropriate Technological Solution for Sewage Treatment - Decentralized STPs Workshop cum Training program on Promoting water use efficiency across urban water sector Bangalore 13th Dec 2013
  2. 2. WATER : What is the issue? • Economic growth : without corresponding infrastructure • Urbanization – Increasing density of population in cities/towns – apartments/commercial buildings – Expanding peripheral areas : Bangalore – new areas developing! • Huge increase in water consumption Where is the water coming from ? – Rivers, Lakes, Ponds …..and now, mainly Ground water!
  3. 3. WATER : Next issue! • Sources of water drying up • A larger issue coming up – – Contamination of Water Sources • The way we dispose off waste water is the biggest issue in water management!
  4. 4. Report Summary • Citizens’ Seventh Report on the State of India’s Environment, “Excreta Matters: How urban India is soaking up water, polluting rivers and drowning in its own excreta” – by Centre for Science and Environment, New Delhi • Report released in May 2012 – covering 71 cities of India, research over 3 ½ years • The report spells out a six-fold strategy for managing water and waste in its last chapter “The agenda for water to water”. Source : http://www.indiawaterportal.org/post/26422 and http://cseindia.org/userfiles/excreta-matter.pdf
  5. 5. How big is the waste water problem? • Total sewage water in Class I and II Cities India – 38254 MLD – Only 11787 MLD (35%) Capacity to treat – Actual treated – only around 8250 MLD (22 %) • Current Scenario – – – – – Increase in demand and cost of water Stringent waste water disposal norms Increased contaminants from industries Urbanization leading to large Sewage generation Untreated sewage leading to severe water pollution - severely impacting ground water availability & quality.
  6. 6. What is “Decentralized” sewage treatment? • Current system : sewage is the responsibility of the Government / public authorities • But – how can public authorities manage : – Cost : widely spread out “development”, apart from untenable economics – Pipe connections – Land availability – for “centralized” treatment plants • On-site, Local Treatment – “Decentralized” STP Gives water back for reuse. (40% of all water requirement)
  7. 7. Recognize and manage Sewage • Recognize and manage Sewage : 78 % officially not treated and let out into rivers, lakes, ground – Sewage generated = 38,255 mld – Capacity to treat = 11,788 mld (30%) – Sewage actually treated = 8,251 mld (22%) • Improper Sewage disposal - the dangers : Spread of disease, contamination of soil and pollution of ground water • Quote from Report : “Sewage must be our obsession” • Quote : “Mantra is Decentralization”
  8. 8. Why Decentralized ? Local benefits! • On-site treatment and discharge – Reduces load on existing sewage system – Local treatment and discharge – protects contamination of water sources (rivers, water bodies, ground water) • Domestic Water consumption : Over 30 % for flushing, washing facilities etc – NON CONTACT applications – Suitable for RECYCLED water
  9. 9. Urban reuse of water • Current cycle : – Ground water -> Usage -> Sewer system -> Water bodies/environment disposal UNSUSTAINABLE ! • Required cycle : – Less ground water -> Less usage -> TREATMENT-> Recycle for non-potable applications -> Recharge of ground water / safe disposal in water bodies or environment • Rain water harvesting – good start. However -> Sustainable water management : only thru Recycling of waste water
  10. 10. Average water consumption Per person Drinking Cooking Total 5 5 10 7% Bathing Washing Clothes Utensils washing Total 55 20 10 85 63% General washing Toilet Flushing Total 10 30 40 30% Grand Total 135 Recyclable – about 40 % (including Gardening etc)
  11. 11. ONE IMMEDIATE SOLUTION RECYCLE WATER At least 40 % of Water usage in urban areas – flushing / landscape maintenance / facilities washing This 40 %+ water can be reclaimed and reused! Leave behind good water for the generations to come
  12. 12. Enzotech Solutions : Credentials • Started in 2006 • ISO 9001:2008 certified company • Strong client roster – testimony to efficacy of Patented technology. • Over 150 Installations all over India. (A few in Africa) • Starting Aug ’11, taken over by a team of seasoned management professionals • Full fledged operations : Design and R & D – Manufacturing – After sales support
  13. 13. An illustrative Case Study – Office complex, Chennai
  14. 14. Office complex – reuse for flushing • Office on Velachery Road • Around 300 people – daily consumption of around 12,000 Litres • Used primarily for flushing toilets, washing hands etc. • Entire water is now treated and reused for flushing
  15. 15. Office complex : progress
  16. 16. Final position – STP with recycling system
  17. 17. The Enzotech treatment process • To trap large objects Bar Screen Sewage treatment Tertiary treatment Treated water • Biological process • Underground installation • Sand & Activated Carbon filter • Ultra Filtration • Ultra violet treatment – Online • Flushing of toilets
  18. 18. Water treatment and recycling in a hospital
  19. 19. Issues faced by hospital • Sewage generated was clogging up sewage lines • Water consumption of 4.5 Lac Litres per day • Space available for the STP was right next to the car park • Post STP installation : – Treated water used partly for flushing – No issue of clogging sewage llines
  20. 20. Hospital installation
  21. 21. Right next to the car park…
  22. 22. EnzoMBBR system
  23. 23. A typical EnzoMBBR plant – with Fibre Reinforced Plastic (FRP) tanks
  24. 24. Thank you
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