How destructive is hot dense brine (the waste from) desalination systems? Seems like it would sink to the floor and create a dead zone.
Here is one for sale: https://www.jains.com/Pipefittings/JainPEPipes/spacial%20fit...
Even if 100% of grey water runoff is mixed with the brine, the resulting concentration is still high enough to cause a localized collapse in the ocean if it isn't properly regulated.
Brine > Uses: https://en.wikipedia.org/wiki/Brine :
> Culinary, Chlorine generation, Refrigerating fluid, Water softening and purification, De-icing, Quenching
Uses for Brine / NaCl not listed on Wikipedia:
Hypochlorite generation. Hypochlorite is the sanitizing primary component of household bleach. Hypochlorite can be made with a 5V USB Hypochlorite generator, salt, water, and watts of electricity.
Salt-based cleaning products; "Non-Toxic Cleaners and EPA Disinfectants" https://saltbased.com/
Energy storage; thermal battery (as heated by concentrated solar, for example)
Energy storage; /? brine NaCl batteries:
Sodium-ion Battery: https://en.wikipedia.org/wiki/Sodium-ion_battery
/? Proton battery brine / sodium
Not brine, but if you're already processing seawater:
Diesel can be made by processing lots of seawater
Hydrolysis and Electrolysis; [Green] Hydrogen production
Nuclear Fusion; to extract D, T, He3, and He4 from (Helion,)
What can be made with Brine and/or NaCl with modern sustainable production processes involving e.g. lasers and fusion heat?
Salt belt: https://en.wikipedia.org/wiki/Salt_Belt :
> The Salt Belt is the U.S. region in which road salt is used in winter to control snow and ice.
Nebraska roadways are treated with brine to pre-treat and de-ice roadways (instead of rock salt, which corrodes many metals).
Though listed as a DIY weed killer ingredient, sodium is a dessicant which dries and prevents plant growth, so salt on the lawn will kill weeds but then leave a dead patch.
Does discharge of fresh water into the ocean by desalination plants, for example, affect the thermal content of the water due to formation of halocines and other thermochemical effects?
Solar pond: https://en.wikipedia.org/wiki/Solar_pond :
> A solar pond is a pool of saltwater which collects and stores solar thermal energy. The saltwater naturally forms a vertical salinity gradient also known as a "halocline", in which low-salinity water floats on top of high-salinity water.