... good biodegradation properties, it can be widely used in circulating cool water system in situation of high alkaline, high hardness ... PESA can be used in system of oilfield refill water, crude oil dehydration and boiler;PESA can be used in circulating cool ... steel, petrochemical, power plant, medicine.PESA can be used in boiler water, circulating cool water, desalination plant, and membrane separation ...