The application discloses an alkaline
wastewater treatment system and method, and belongs to the field of
wastewater treatment. The alkaline
wastewater treatment method comprises the following steps: sending
clean water and normal-temperature
carbon dioxide into a
carbon dioxide injector to mix, forming carbonated water, then sending the carbonated water and alkaline wastewater into a reactor to react, the reaction pressure is 0.4-0.6 Mpa, and
carbon dioxide with a temperature of 5-10 DEG C is sent into the reactor, the water outlet of the reactor is sent into a pressure
reducer to reduce the pressure, the carbon dioxide in the water is released, and the water is backflowed into the carbon dioxide
injector, the filtered water after
pressure reduction is collected into a water collecting tank, then the
clean water is obtained after
filtration through a filter, and the
clean water is reused to the carbon dioxide
injector. The alkaline wastewater
treatment system and method can make the carbon dioxide well neutralize and treat the alkaline substances in the alkaline wastewater through pressurization and
pressure reduction, has high treatment efficiency and good
treatment effect, and realizes the recycling of carbon dioxide and water.