초록 ▼

A process for treating aqueous industrial or municipal effluent is described, wherein the effluent is treated with lime to a pH of at least 11.0 allowed to settle and the supernatant liquid treated with chlorine at the high pH. A substantially complete kill of micro-organisms, particularly coliforms

A process for treating aqueous industrial or municipal effluent is described, wherein the effluent is treated with lime to a pH of at least 11.0 allowed to settle and the supernatant liquid treated with chlorine at the high pH. A substantially complete kill of micro-organisms, particularly coliforms, is thereby achieved. The liquid, after adjustment to suitable pH, may be returned to natural water streams.

대표청구항 ▼

A process of treating sewage containing micro-organisms including bacteria, coliforms, and streptococci which comprises the steps of: (a) mixing said sewage with a material containing a compound of the group consisting of calcium oxide and calcium hydroxide thereby to form a mixture having a pH of a

A process of treating sewage containing micro-organisms including bacteria, coliforms, and streptococci which comprises the steps of: (a) mixing said sewage with a material containing a compound of the group consisting of calcium oxide and calcium hydroxide thereby to form a mixture having a pH of at least 11.0, said mixture containing solids in suspension in a liquid, (b) treating said mixture to separate at least a portion of said solids from said liquid, (c) treating said liquid with chlorine at said pH of at least 11.0 for at least 1 minute to obtain a total residual chlorine content (TRC) in said liquid of at least 0.1 parts per million and to substantially destroy said micro-organisms, and (d) adjusting the pH of said liquid to an environmentally acceptable level.