64-05: Use of a Cooling Tower as a Trickling Filter in Pollution Control

The Problem of "wastes" discharge to receiving streams, both large and small, has been with us for many years. It was not until after the start of the twentieth century, however, that we considered the seriousness of such practices and took steps to correct this situation.  As our general industries of all kinds. Some industries become contaminated by some constituent of the product being manufactured, although this is certainly being limited as there is a definite economic loss from such practices.