The invention relates to systems and methods for maintaining the concentration of a brine solution used in meat processing. In an embodiment, a method includes measuring a concentration property of brine solution in a reservoir with a sensor; supplying data regarding the concentration property of the brine solution to a controller; removing diluted brine solution from the reservoir when the controller determines that the concentration property falls below a defined set point; adding a liquid composition comprising greater than about 50 wt. % of a potassium phosphate salt to the reservoir from a phosphate solution supply tank when the controller determines that the concentration property falls below a defined set point; and replenishing the phosphate solution supply tank by adding a liquid phosphate salt composition having a consistent concentration to the phosphate solution supply tank. Other embodiments are included herein.