Process for treating ammonia and nitrite containing waters to reduce nitrogen oxide emissions therefrom

A process for treating a condensate of steam derived from an aqueous brine containing nitrite, said method comprising contacting said condensate with a halogenated, organic, oxidizing agent in an amount less than the stoichiometric amount required to oxidize all the nitrite in the condensate to nitrate, instead wherein the oxidizing agent includes at least one ##STR13## wherein X is a halogen.

A process for use in a system for handling a flow of condensate of steam, the condensate containing ammonia and/or ammonia precursors, the process controlling the emission of nitrogen dioxide from, and a concentration of one or more organisms selected from the group consisting of fungi, algae and bacteria growing in, the condensate handling system, the process comprising the steps of:

• (a) contacting the condensate, in a substantially continuous manner by introducing into the condensate an amount of an oxidizing agent which substantially prevents the emission of nitrogen dioxide from the condensate handling system but which does not substantially inhibit the growth of said organisms in the condensate handling system, said oxidizing agent having at least one ##STR18## wherein X is a halogen;
• and (b) periodically contacting the condensate with an amount of a biocide which substantially reduces the concentration of said organisms.

A process comprising reducing the emission of one or more oxides of nitrogen from a system handling aqueous liquids containing oxidizable nitrogen components by adding to at least one of said liquids an oxidizing agent which comprises a heterocyclic ring compound having from 5 to 6 atoms in at least one ring in an amount stoichiometrically insufficient to oxidize all the oxidizable nitrogen components in said at least one liquid to nitrates.

A process for treating a condensate of steam, derived from an aqueous brine containing nitrite, and a concentration of one or more organisms selected from the group consisting of algae, fungi and bacteria by introducing into said condensate a halogenated, organic, oxidizing biocide in an amount sufficient to result in oxidation of substantially all the nitrite in the condensate, but insufficient to substantially inhibit an increase in the concentration of said organism in said condensate.

A process comprising substantially eliminating the emission of one or more oxides of nitrogen from a system handling aqueous geothermal liquid having liquid streams containing oxidizable nitrogen components by adding an oxidizing agent to at least one of said streams in an amount stoichiometrically insufficient to oxidize all the oxidizable nitrogen components theoretically in the at least one stream to nitrates.