Complex sentence: Two of the main processes of industrial water treatment are Boiler Water Treatment and Cooling Water Treatment, a lack of proper water treatment can lead to the reaction of solids and bacteria within pipe work and boiler housing.
Split into simpler sentences: Two of the main processes of industrial water treatment are "boiler water treatment" and "cooling water treatment". A lack of proper water treatment can lead to the reaction of solids and bacteria within pipe work and boiler housing.