Onsite electro-chlorination.
https://www.emergency-wash.org/water/en/technologies/technology/onsite-electro-chlorination
👉🏼 PDF: https://app.box.com/s/t7jg2ghm92tb6vv204hlifx0t3wgwnlj ___ Onsite Electro-Chlorination (electrolytic generation of sodium hypochlorite) produces chlorine for disinfection through the electrolysis of aqueous sodium chloride (common salt, or NaCl). It can be produced in batch mode, converting a salt solution into sodium hypochlorite with a concentration of 6–12 g/L either in one buffer tank or in a flow-through system that continuously produces hypochlorite.