NaWaTech stands for natural water systems and treatment technologies to cope with water shortages in urbanised areas in India. It is a project under the European Commission's 7 Framework Programme and is co- funded by the Department of Science and Technology, Government of India. The NaWaTech consortium aims to promote an integrated approach for wastewater treatment which would include interventions over the entire urban water cycle optimization of water use by reusing water and pollution of freshwater resources preventing prioritization of small scale natural technical systems, which are flexible, cost-effective and require low operation and maintenance. The NaWaTech project started on April 1, 2013, and it has a scheduled duration of 36 months. Pune and Nagpur have been selected as the two cities for implementation of the project in India. The hostel campus at College of Engineering Pune is the largest project site in Pune chosen for NaWaTech.
COEP Hostel Campus Site is one of the oldest Hostel currently houses 2000 students. The task was to design a wastewater treatment system for the existing capacity Given that the campus has many heritage structures, green cover and upcoming buildings, it was a challenge to find an adequate space for the system.
Decentralized anaerobic systems for primary treatment and Planted Gravel Filter/Wetland for posttreatment of water and greywater treatment. Anaerobic System designed by Ecosan Service Foundation Vertical flow wetland designed by Iridra S.R.L which is an Italian firm.The treated water will be used for gardening and flushing in the hostel blocks.
Total Treatment Capacity = 180 cu m of wastewater per day
Current Reuse Potential = 113 cu m per day
It is proposed that in the near future the excess treated water will be reused for construction activities in the campus and later on for activities like dust suppression in the college cricket ground.
DTS 40 = 40 cu m/day capacity Decentralised Anaerobic Treatment System
DTS 100 = 100 cu m/day capacity Decentralised Anaerobic Treatment System
PGF 1 = 40 cu m/day capacity Planted Gravel Filter
PGF2 = 100 cu m/day capacity Planted Gravel Filter
Schematic Flow Diagram for Treatment System at COEP Hostel
FAQs
1. Has a feasibility study been done?
• Yes, based on which the proposal was submitted to COEP for approval
2. What are the operational costs?
• The installation and operation costs must not be large, since the students are the ones who are affected by the costs.
• The system is of NaWaTech project which is an Indo-EU joint project funded by Department of Science and Technology, Govt. of India.
• Almost 75% of the capital Investment cost comes from this funding, a treatment system is now a legal requirement for institutions or premises which have a high residential population. Annual OEM costs including labor, desludging, consumables, pumping cost-Rs.135 per capita
• This is very low as compared to other conventional technologies which cost upwards of Rs. 300 per capita annually
3. How high is the space demand?
• The one being planned at COEP has different units. The area wise occupancy of the units are Anaerobic Systems
• DTS 40: 71.25mDTS 100: 114 m.
• Planted Gravel Filters/Wetland Systems
• PGF 1 (40m3/day) 133 m²
• PGF 2 (100m3/day): 405m
4. In case of a breakdown, how long will it take to fix the problem?
• Depends on the nature of the problem.
• For e.g., if there is a problem with the pumps, then there will be standby pumps available so there would be no interference with the operation of the system.
• If there is choking in the system, then it might take a couple of hours to a day for the blockage to be removed.
5. What will be done with the sludge?
• Sludge will be taken away once every two years by PMC designated private company. It will be dealt with at a dedicated sludge management facility for production of manure
• No smell from the sludge during operation of the plant. Some smell might be experienced during desludging.
• But this is only a maintenance activity which happens once in two years and is completed within one day.
References and Sources
Pictures - Primary survey https://wateractionhub.org/projects/1152/d/nawatech-water-treatment-in-urbanised-areas-inindia/ https://worldarchitecture.org/architecture-projects/hzhff/girls_hostel_coep_pune-project-pages.html https://coepianforcoepians.wordpress.com/2017/06/14/a-z-of-the-coep-boys-hostels-gaurav-chandak/
Content – COEP Hostel
All rights belong to their respective owners. I do not own any of this content
Kaveri Gaikwad, CoEP, Pune
Shubham Rane, CoEP, Pune
Rushikesh Kharche, CoEP, Pune
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