As per IMS- ESMS Water Environment

 As per IMS- ESMS Water Environment

Dear Sir,

Very good noon, just I am going through the feasibility study of Green Ammonia plant in Indian context that I am sharing about water management will be helpful with our Green ammonia plant steam and available facilities to be modified with our AM green plant layout.

It will be helpful to project Associates 

Please see in it and attached EHS guidelines.

https://dramarnathgiri.blogspot.com/2025/05/water-balance-monitoring-in-green.html

https://dramarnathgiri.blogspot.com/2025/05/monitoring-water-consumption-in-green.html

https://dramarnathgiri.blogspot.com/2025/05/for-green-ammonia-plant-water-related.html

As per IMS F-AMG-AO-ESMS-06-02

Process, cooling and wastewater

Water is required for hydrogen production, cooling water system (for Hydrogen plant/ Ammonia plant & BoP), service water,

firefighting system, drinking water,etc

The plant water system will be designed to minimize the overall water consumption. The system design will avoid the use wet

cooling system that require continuous make-up water supply to compensate for evaporation and blowdown losses.

Low water consuming cooling system options such as air-cooled condensers (ACC) for condensing steam from the steam

turbine exhaust, and closed loop radiator coolers for Electrolysers, and STG auxiliaries, Ammonia plant coolers, BoP equipment coolers, is considered for the system design.

Demineralised water must be supplied to the electrolysers continuously for producing Hydrogen. A limited amount of demineralised water will be required for make-up to the steam cycle to compensate for blowdown. All other users of demineralised water require only intermittent supply to compensate for leakages and for loop filling during plant start-up and maintenance. Such consumers are radiator coolers of the electrolysers, syngas compressors, Ammonia plant, ASU, H2 booster compressors, and the BoP system (air compressors and other coolers). 

Process water is required for other applications such as Firefighting system (filling and make-up), Service water system, and HVAC system. This will be tapped off from the outlet of the RO system first pass and stored in the Raw water/Firewater

storage tanks.

Drinking water requires a minimum level of TDS and therefore cannot be obtained from the Desalination plant. Drinking

water of 2000 litres/day capacity) is required for the plant. A portion of Product water from First Pass RO system will be

utilised to produce drinking water.

Effluents produced in the water treatment plant are collected and treated in an Effluent Treatment Plant before discharge.

Biological waste will be treated separately in skid mounted sewage treatment plant, and the discharged water will be used for

landscaping purposes. Continuous effluents generated in the Deminerslization plant are from the Multigrade filter, Activated

Carbon filter, Ultra Filtration system, and RO system. 

However, disposal of waste will require approval from the State Pollution Control Board.

The other liquid wastes generated are–

1) Ammonia plant - Continuous

2) Blowdown from the Steam water cycle- continuous

3) Mixed Bed Ion Exchanger in the Demineralizer plant – intermittent (during weekly regeneration)

4) RO System cleaning – Intermittent (once in 4-5 months)

5) UF system cleaning – Intermittent (once in 4-5 months)

6) Condensate polishing unit (CPU) – intermittent (weekly or monthly depending on impurities coming from the

process heat exchangers of the Ammonia plant)

7) Electrolysers - intermittent (only during maintenance)

8) Miscellaneous sources like floor washes and radiator coolers – intermittent.

The above liquid effluents will be collected and treated in a neutralization pit before discharge from plant.

The demineralised water from the water treatment plant will be stored in two storage tanks that will have a combined total

capacity equivalent to 24 hours of consumption. The tanks will be constructed of carbon steel material and the internal surfaces will be lined with Epoxy (or PU liner or rubber liner or PU coating) to prevent corrosion.

Considering the remoteness of the plant, the quantity of chemicals required for operating the water treatment plant such as

Sodium Hydroxide, Hydrochloric Acid, Sodium Hypochlorite and Ferric Chloride will be stored onsite to meet the operational requirement of about 30 days.

Drains

Rainwater from the plant area will be collected through a network of drains and discharged to rainwater collection pits. All

drains in the plant area and around buildings will be covered drains. Storm water drain will be directly connected to rainwater

collection ponds or rainwater harvesting system planned at different places.

Sewage treatment & disposal

Sewage from the plant will be treated in skid mounted sewage treatment plant proposed at a few locations like the Plant

building, Control building, and non-plant buildings. The treated effluent will be utilised for the irrigation of landscaped areas.

With best regards 

Dr. Amar Nath Giri