Recently, the emphasis is put on the impact of chemical substance such as the environment hormone material. The question is also being given to the use of surfactants with molecular structures such as nonylphenol, etc. Fundamental and prudent consideration is required in the use of synthesis organic compounds. But textile pretreatment and dyeing process and overall textile manufacturing processes have a significant effect on the environment. Spinning oils, sizing agents, and fibrous scum removed in textile pretreatment, are discharged in wastewater. Also unfixed dye, unreacted additives and finishing agents such as acids, alkalis, etc after dyeing and finishing is included wastewater. In this research, environmental friendly technology using electrolyzed water was developed and introduced to scouring. Advantages of this technology are to reduce the amount of chemicals including surfactants. This technology has not been applied for textile manufacturing process. Equipments producing electrolyzed water were designed to produce 2 ton/day, 10 ton/day and 50 ton/day in order to apply to textile pretreatment process. The aim of this work was to study a scouring process using electrolyzed water and the possibility of reducing scouring agent and NaOH. PET/cotton knit were scoured with scouring agent, NaOH, and water electrolyzed at various electrical currents and production speeds. The scouring process using electrolyzed water can reduce treatment costs and pollution.