Omya Optical has a natural buffering effect, unlike caustic soda, lime and, to a lesser extent, magnesium hydroxide, which risk harming the biology of the activated sludge through accidental overdosing. Excess Omya Optical extends the buffer against further acidification and maintains a stable operation. In contrast to lime and magnesium hydroxide, Omya Optical doesn’t clog pipes or leave hard deposits at the bottom or on the sides of tanks. This increases station availability and significantly reduces maintenance costs and man-hours.