Dry chemical mix system for hemodialysis

A method for providing dialysate solution to a hemodialysis apparatus comprising the steps:

• introducing a dry chemical dialysate mix to a dissolution vessel at a substantially constant rate;
• introducing a fluid to the dissolution vessel at a substantially constant rate;
• facilitating the dissolution of the dry chemical dialysate mix into the fluid in the dissolution vessel;
• detecting a physical characteristic of the dissolved solution and producing an output signal corresponding thereto;
• providing a reference signal corresponding to a desired value of the physical characteristic;
• comparing the output signal with the reference signal and producing a control signal corresponding thereto;
• adjusting the rate at which the dry chemical dialysate mix or the fluid is introduced to the dissolution vessel in response to said control signal so as to regulate the detected physical characteristic of the dissolved solution substantially to the desired value;
• and
• continuously removing dissolved solution for supply to the hemodialysis apparatus.