Desalination Plant Tender

A desalination plant tender is an NIT issued by state water boards, urban local bodies, or port trusts for the procurement of seawater reverse osmosis (SWRO) or brackish water reverse osmosis (BWRO) treatment facilities that convert saline water into potable or process-grade freshwater, typically for water-stressed coastal states such as Tamil Nadu, Gujarat, Maharashtra, and Andhra Pradesh.

What is a Desalination Plant Tender?

Desalination plant tenders cover EPC (Engineering, Procurement, Construction) or Design-Build-Operate (DBO) contracts for facilities ranging from small modular units (0.5 to 5 MLD) for coastal towns to large-scale plants (100 MLD and above) for metropolitan water supply augmentation. Procurement includes civil works for intake and outfall structures, high-pressure reverse osmosis membrane systems, energy recovery devices, post-treatment remineralization, electrical systems, and full SCADA instrumentation.

Given the technological complexity, most desalination tenders use a quality-and-cost-based selection or two-bid system rather than a simple L1 procurement. Technically qualified bidders submit a financial BOQ only after their proposed technology, energy efficiency benchmarks, and product water quality are verified. EMD is typically 1-2% of estimated project cost, and bids must include performance guarantee commitments covering output capacity and energy consumption per cubic metre.

Desalination tenders above Rs 50 crore are published on CPPP and state portals. The Tamil Nadu Water Supply and Drainage Board has historically been the most active issuer of large desalination tenders in India, having procured plants at Nemmeli and Minjur near Chennai.

Why desalination plant tenders matter for Indian government suppliers

Climate stress and groundwater depletion in peninsular India are making desalination a strategic necessity. Tamil Nadu alone plans capacity of over 400 MLD, and states like Gujarat and Maharashtra are exploring similar investments. This creates high-value contract opportunities for EPC contractors with desalination experience, membrane manufacturers, high-pressure pump suppliers, electrical system integrators, and O&M specialists, often in joint venture arrangements with international technology partners.

Example

A consortium of an Indian EPC contractor and a Spanish desalination technology company bids for a 150 MLD SWRO desalination plant tender issued by the Chennai Metropolitan Water Supply and Sewerage Board. The NIT specifies a 30-year Design-Build-Finance-Operate-Transfer (DBFOT) structure with payment through a bulk water purchase agreement. The consortium submits a financial bid quoting a levelized water cost of Rs 62 per kilolitre and wins after technical evaluation of energy recovery system design and membrane specifications.

Frequently Asked Questions

What procurement model is most commonly used for large desalination tenders in India?

Large desalination plants in India are typically tendered on a Design-Build-Operate (DBO) or DBFOT (Design-Build-Finance-Operate-Transfer) model with a 15 to 30-year concession. This transfers technology and performance risk to the private operator while giving the government assured bulk water supply at a pre-agreed tariff per kilolitre.

What technical qualifications are required to bid for desalination tenders?

Bidders typically need to demonstrate prior commissioning of at least one SWRO or BWRO plant of 50%+ of the tendered capacity, along with O&M track record. Energy efficiency benchmarks (kWh per cubic metre) and product water quality guarantees are key technical evaluation criteria. Foreign technology firms often participate as consortium members or sub-contractors.

Are there smaller desalination tenders for rural or island areas?

Yes. The Ministry of Jal Shakti and state PHEDs issue tenders for small modular desalination units (0.5 to 5 MLD) for water-stressed coastal villages, remote islands, and border areas. These are simpler tenders with standard BOQ items and are accessible to Indian manufacturers of compact RO systems.

What environmental clearances affect desalination tenders?

Desalination projects require Environmental Impact Assessment and clearance from the Ministry of Environment, Forest and Climate Change (MoEFCC), as well as coastal regulation zone (CRZ) clearance for intake and outfall structures. The procurement timeline accounts for these statutory clearances, and some tenders require bidders to obtain clearances as part of the contract scope.