Most industries have production waste. When using chemicals, these present a threat to nature. Enzymes can do the same job cheaper without threatening the environment.
Enzymes are part of nature and are therefore fully biodegradable. When industrial enzymes have done their job, they leave the production plant with the wastewater. The spent enzymes do not last long in the surrounding environment; nature has many microorganisms that easily break them down into single amino acids, which are then used to build up life around us.
The fact that there are no hazardous waste products makes industrial enzymes the most environmentally friendly solution to most industrial problems.