Use of peracetic acid/hydrogen peroxide and peroxide-reducing enzymes for treatment of drilling fluids, frac fluids, flowback water and disposal water

A method of treating a water source comprising:

• adding a percarboxylic acid and peroxide-reducing agent to a water source to form a treated water source having a hydrogen peroxide to peracid ratio from about 0:100 to about 1:10 by weight, wherein said antimicrobial composition in a use solution with said treated water source comprises (i) less than about 1000 ppm of a catalase enzyme, (ii) from about 0 wt-% to about 1 wt-% hydrogen peroxide;
• (iii) from about 0.0001 wt-% to about 10.0 wt-% of a C1-C22 carboxylic acid;
• and (iv) from about 0.0001 wt-% to about 10.0 wt-% of a C1-C22 percarboxylic acid.
• wherein the treated water source reduces corrosion caused by hydrogen peroxide and reduces microbial-induced corrosion, and wherein the antimicrobial composition does not interfere with friction reducers, viscosity enhancers, other functional ingredients found in the water source or combinations thereof.

An aqueous water treatment composition with antimicrobial activity comprising:

• a produced water source;
• from about 1 ppm to about 1000 ppm of a peroxide-reducing enzyme;
• from about 0 wt-% to about 1 wt-% hydrogen peroxide;
• from about 0.0001 wt-% to about 10.0 wt-% of a C1-C22 carboxylic acid;
• and
• from about 0.0001 wt-% to about 10.0 wt-% of a C1-C22 percarboxylic acid,
• wherein the aqueous water treatment composition does not interfere with friction reducers, viscosity enhances, other functional ingredients found in the water source or combinations thereof, and
• wherein the hydrogen peroxide to percarboxylic acid ratio is from about 0:100 to about 1:10 by wt.

An aqueous water treatment composition with antimicrobial activity comprising:

• a produced water source;
• from about 0 wt-% to about 1 wt-% hydrogen peroxide;
• and
• from about 0.0001 wt-% to about 20.0 wt-% of a single or mixed percarboxylic acid,
• wherein the aqueous water treatment composition does not interfere with friction reducers, viscosity enhances, other functional ingredients found in the water source or combinations thereof, and
• wherein the hydrogen peroxide to percarboxylic acid ratio is from about 0:100 to about 1:10 by wt.