Aquatech International Corporation

Seawater reverse osmosis plant for india’s first 4,000 MW ultra mega power project


Courtesy of Aquatech International Corporation

The Facility

India’s first Ultra Mega Power Project (UMPP) at Mundra in Coastal Gujarat, a 4,000 MW coal fired plant, is owned by Coastal Gujarat Power Limited (CGPL), a Tata Power group company. Tata Power is India's largest private sector power utility with an installed generation capacity of over 2,300 MW. The CGPL UMPP, awarded on a 20 year BOOT basis, will be India’s first private sector power project using supercritical boiler technology; and is expected to be the most energy efficient plant in India.

CGPL will draw seawater from the Mundra coast for various utilities and for their main boiler. Aquatech has been awarded the contract for executing the 4,622 GPM (25,200 m3/day) (permeate) capacity Seawater Reverse Osmosis Plant (SWRO) on EPC Basis. Aquatech is honored and very proud to be associated with the First UMPP going on stream in the country.

The Challenge

The challenge for Aquatech is 40% permeate recovery on difficult feed water, with Total DissolvedSolids (TDS) content varying from 42,000 mg/l to 46,000 mg/l and a maximum feed water temperature of 950F (350C). This has however not deterred Aquatech from committing stringent treated water quality of less than 450 mg/l TDS levels at the outlet of SWRO and 5-7 mg/l TDS levels at the outlet of Brackish Water Reverse Osmosis Systems (BWRO).

The Solution

One of the larger desalination projects to come up in India in recent years, the Aquatech plant, utilizing SWRO technology, will produce 25.2 MLD of desalinated water for various end user applications. A part of desalinated water will further be treated through a BWRO system to produce 660 GPM (3,600 m3/day) of permeate for using in the upstream mixed beds demineralization plant for boiler feed application.

The Aquatech SWRO system consists of a 2 x 6,160 GPM (2 x 1,400 m3/hr) pretreatment plant comprising of Lamella Clarifiers followed by twostage filtration using Dual Media and Pressure Sand Filters. The SWRO system consists of four streams of SWRO banks followed by two banks of BWRO. Aquatech also has a mandate to carry out the O&M for a period of Three years after commissioning of the CGPL project.

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