초록 ▼

A method of controlling the amount of conductivity increasing substances, e.g., free available halogen, in particular free available chlorine, present in an aqueous medium is described. In accordance with the method of the present invention, an aqueous medium is provided and its conductivity determi

A method of controlling the amount of conductivity increasing substances, e.g., free available halogen, in particular free available chlorine, present in an aqueous medium is described. In accordance with the method of the present invention, an aqueous medium is provided and its conductivity determined. A source of at least one conductivity increasing substance is introduced controllably into the aqueous medium, and a second conductivity measurement is made. The determined conductivities are compared, and in response to this comparison, the amount of conductivity increasing substance added to the aqueous medium is adjusted. In a preferred embodiment of the present invention, the aqueous medium is an aqueous stream, and the source of conductivity increasing substance is calcium hypochlorite, which is introduced into the aqueous stream through the use of a feeder unit, i.e., a chlorination unit.

대표청구항 ▼

[ We claim:] [14.] A method of sanitizing a surface comprising:(a) controlling the amount of free available halogen present in an aqueous stream by the steps of:(i) providing a halogenation unit having therein a source of free available halogen;(ii) providing an aqueous stream;(iii) splitting said a

[ We claim:] [14.] A method of sanitizing a surface comprising:(a) controlling the amount of free available halogen present in an aqueous stream by the steps of:(i) providing a halogenation unit having therein a source of free available halogen;(ii) providing an aqueous stream;(iii) splitting said aqueous stream into a first aqueous stream and a second aqueous stream;(iv) introducing controllably said first aqueous stream into said halogenation unit and into contact with said source of free available halogen;(v) removing a third aqueous stream from said halogenation unit, said third aqueous stream containing free available halogen;(vi) combining said third aqueous stream with said second aqueous stream to form a fourth aqueous stream;(vii) determining the electrical conductivities of the aqueous stream of step (a)(ii) and of said fourth aqueous stream;(viii) comparing the conductivities determined in step (a)(vii); and(ix) adjusting in response to the comparison of step (a)(viii) the introduction of said first aqueous stream into said halogenation unit, thereby controlling the amount of free available halogen present in said fourth aqueous stream; and(b) applying said fourth aqueous stream to a surface to be sanitized.