Biocide and antimicrobial solutions having hydrogen peroxide and peracetic acid used in pulp and paper mill systems, namely, treatment of process water for slime control in the manufacturing of paper and paperboard, treatment of paper machine white water, catalase control in deinking water loops, treatment of industrial raw and process water associated with paper production, treatment of sewage and wastewater effluent associated with paper production, treatment of starch used for sizing on paper machines, treatment of clays used as coatings and fillers on paper machines, preservation of paper coatings, treatment of dispersed pigments used in paper production, treatment of raw and process water associated with paper production in closed loop water systems, heat exchanger systems, boilers and wet scrubbers; Biocide and antimicrobial solutions having hydrogen peroxide and peracetic acid for use in waste water treatment plants, namely, treatment of industrial raw and process water, treatment of sewage and wastewater effluent associated with public and private wastewater treatment plants, and treatment of raw and process water used in indoor closed loop, non-potable, non-food contact water systems; Biocide and antimicrobial solutions having hydrogen peroxide and peracetic acid for treatment of industrial process waters and food facilities to control spoilage microorganisms.; Biocide and antimicrobial solutions having hydrogen peroxide and peracetic acid for use in reverse osmosis, ultra filtration and membrane systems, namely, non-pathogenic, non-public health microbial control of ultra filtration and reverse osmosis membranes and associate piping systems, batch treatment of nanofiltration, ultra filtration and reverse osmosis systems, and continuous or intermittent addition to reverse osmosis systems