The ETP’s ultimate goal is to release safe water into the environment, protecting it from the potentially harmful effects that are caused by effluent. Depending on the industry, the effluents that are produced contain a wide variety of elements. Some effluents contain harmful compounds, while others contain oil and grease. Some effluents contain both (e.g., cyanide). Degradable organic contaminants can be found in the effluents of food and beverage manufacturing facilities. As a result of the fact that industrial wastewater contains a wide variety of contaminants, a particular type of treatment technology known as ETP is necessary.