Patent ID: 11932562
Assignee: UGSI SOLUTIONS, INC.
Field: Environmental technology (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of automatically controlling chloramine concentration in a body of water contained in a reservoir, the method comprising:
a) determining residual chloramine concentration in a first water sample obtained from the body of water;
b) automatically engaging a supply of chlorine to add chlorine to the body of water when:
i) the residual chloramine concentration in the first water sample is determined to be below a pre-determined residual chloramine concentration set-point; or
ii) the residual chloramine concentration in the first water sample is determined to be below a first chloramine concentration percentage of a pre-determined residual chloramine concentration set-point;

c) determining residual chloramine concentration in a second water sample obtained from the body of water after step b); and
d) automatically engaging a supply of ammonia and the supply of chlorine to add both ammonia and chlorine to the body of water if:
i) the residual chloramine concentration in the second water sample is determined to be below the residual chloramine concentration in the first water sample; or
ii) the residual chloramine concentration in the second water sample is determined to be below a second chloramine concentration percentage of the pre-determined residual chloramine concentration set-point,

wherein steps a) through d) form at least a portion of a first water treatment cycle, and wherein the method comprises a subsequent water treatment cycle that is different from the first water treatment cycle,
wherein a controller, in operable communication with an analyzer and one or more computer-readable storage mediums containing programming instructions, automatically executes steps a)-d) of the first water treatment cycle and the steps in the subsequent water treatment cycle that is different from the first water treatment cycle, and
wherein the programming instructions comprise algorithm X or algorithm XI for causing the controller to add chlorine and ammonia in the subsequent water treatment cycle:
Algorithm X: y′<x′=add chlorine and ammonia, where y′ is the residual chloramine concentration determined in the first water sample of the subsequent treatment cycle and x′ is the residual chloramine concentration set-point; or
Algorithm XI: y′<[(a′)(x′)]=add chlorine and ammonia, where y′ is the residual chloramine concentration determined in the first water sample of the subsequent treatment cycle, a′ is a percentage selected within a range of 99% to 80%, and x′ is the residual chloramine concentration set-point.