Page 76 - HUDCO-BPA21

ENVIRONMENTAL MANAGEMENT, ENERGY CONSERVATION & GREEN BUILDING

APPLICATION OF ENVIRONMENTAL Ÿ Conservation of water bodies and prevention of Kodungaiyur area falls under Zone I & II, covering an
groundwater depletion by industries. area of 86.14 sq. km. with a population of 16.5 lakhs (as
FRIENDLY TECHNOLOGIES AT CITY / per 2011 census). There are three treatment plants of 80
Ÿ To drought-proof Chennai during failure of monsoon.
BUILDING LEVEL Ÿ Reducing the stress arising due to vagaries of MLD, 80 MLD and 110 MLD capacity,totalling 270
MLD existing at Kodungaiyur for treating the sewage
monsoons. generated in the North Chennai & part of Central Chennai
- by Chennai Metropolitan Water Supply and Sewerage Board, Tamil Nadu
city area and adjacent urbanised areas of Madhavaram
CMWSSB also embarked on a unique initiative of setting
and Kathivakkam. The present generation of sewage from
up the largest Tertiary Treatment plants in the last two
Zone I & II and adjacent urbanized areas is about 220
years which have been commissioned and supplies 90
MLD per day. Out of the 220 MLD, 65 MLD of
MLD of potable quality reuse water to the industries in the
wastewater shall be treated up to the tertiary level to get
city every day . Chennai will become the first Indian city
the product water of 45 MLD through Reverse Osmosis
to recycle and reuse 20% of its sewage, which will be the
he Sewerage System for Chennai city was installed in 1917 and has been divided into 5 drainage zones. and distributed to Industries.
highest performance of any Indian city in that matter. 30
These zones of macrosystems covering the entire city have independent zonal collections, conveyance,
MLD of secondary treated sewage is being supplied to the During the execution of the project, an extensive
Ttreatment and safe disposal facilities. Chennai city has 12 Sewage Treatment plants at 4 locations with a
industries from the year 1993. On the whole, 120 MLD of awareness campaign was undertaken on the importance
total installed capacity of 727 MLD. Around 530 MLD of Secondary Treated Effluent is discharged into the
freshwater supply to the industries is saved which will of recycling and reusing. Market linkages were
waterways. Chennai has a dense industrial cluster and ensuring an uninterrupted water supply is vital for their
reduce the demand-supply gap. established upfront with all industrial stakeholders by
viability. In order to supply water to various Industries at the Northern part of Chennai and SIPCOT industries
holding repeated meetings and visits to the plant to allay
in southwest part of Chennai city, CMWSS Board has constructed 2 Tertiary Treatment Reverse Osmosis (TTRO) PROCESS:
all concerns about the safety and quality of reuse water.
Plants of 45 MLD capacity each expandable to 60 MLD at Koyambedu and Kodungaiyur, including laying
Recycle and reuse of wastewater by Tertiary Treatment The product water was christened as “TRU water”
conveying pipeline to supply product water to the SIPCOT Industries in Irungattukottai, Sriperumbudur and
Reverse Osmosis is a technology-driven intervention to (Tertiary Reusable Water) in the lines of Singapore's
Oragadam and Industries in Manali–Ennore Corridor & Manali–Minjur Corridor, North Chennai. A total of 540
ensure uninterrupted supply of water to the industries. 'NEW water' for branding. Also, Resident Welfare
industries from both Industrial corridors including thermal power plants are the beneficiaries of this technological
Adoption of state-of-the-art technology to address the Associations were actively invited for advocacy
intervention. This ensures assured treated water supply and reduces the freshwater supply-demand to the industries.
water security of the city has been the key feature of this workshops to explain the novel concept that was being
project. adopted.
The Sewerage System for Chennai city was installed in MOBILISATION OF RESOURCES:
BACKGROUND: supply to the industries but also the letting of secondary 1917 and has been divided into 5 sewerage zones. These
treated sewage in the waterways. The TTRO Plant at Koyambedu was established at a cost
Chennai is a metropolitan city and capital of Tamil Nadu. zones of macrosystems covering the entire city have of Rs. 486.21 crores. Rs. 231.50 crore has been received
It has an area of 426 sq km and a population of 7.5 million. KEY DATES: independent zonal collections, conveyance, treatment as Grant from GoTN under TNIPP Phase I, Rs.208.82
and safe disposal facilities.
While the water sources have remained constant, the Dates Significance /Achievement crore has been sanctioned as a grant from the Government
demand has been steadily rising. The demand-supply gap
01.10.2019 Commissioning of TTRO Plant at Kodungaiyur Koyambedu area falls under Zone III, covering an area of of India and Government of Tamil Nadu under AMRUT
is 300 to 400 MLD per day and hunting for drinking water
29.11.2019 Commissioning of TTRO Plant at Koyambedu 34.2 sq km with a population of 9.5 lakhs (as per the 2011 and Rs. 30.00 crore as a grant from GoTN under
was the challenge for the citizens of the city. census). There are three treatment plants of 34 MLD, 60 CMCDM. Similarly, the TTRO Plant at Kodungaiyur was
ESTABLISHMENT OF PRIORITIES:
The industrial demand is around 100 MLD per day which MLD and 120 MLD capacity totalling 214 MLD exist at established at a cost of Rs. 348 crore. Rs. 229.50 crore of
is presently met from surface water and desalination. Ÿ Uninterrupted supply of treated waste water to the Koyambedu for treating the sewage generated in the which Rs. 153.00 crore as loan and Rs. 76.50 crore as a
Around 530 MLD of Secondary Treated Effluent is industries, thereby facilitating industrial growth and Central Chennai & West Chennai city area and adjacent grant has been received from TNSUDP under World Bank
discharged into the waterways every day . By recycling employment. urbanised areas of Ambattur (Part) and Mogappair. The funds and Rs. 118.67 crore has been sanctioned as grant
and reuse of waste water, which otherwise would have present generation of sewage from Zone III and adjacent from Government of India and Government of Tamil
Ÿ Introduction of Reduce – Recycle – Reuse (RRR)
been discharged into the waterways, an additional source urbanized areas is about 120 MLD. Out of the 120 MLD, Nadu under AMRUT. The technical and human
concept for sustainability.
of water is being generated. The establishment of TTRO 65 MLD of wastewater shall be treated up to the tertiary resources contributed by the Engineers & employees of
Plants has not only reduced the demand of freshwater Ÿ Reduced contamination of waterways due to reduced level to get the product water of 45 MLD through Reverse CMWSSB, TWIC and the contractors M/s. BGR Energy
discharge of waste water. Osmosis and distributed to Industries. Systems Limited, Chennai and M/s. Wabag & IDE

{ 62 } { 63 }