Forced Air Evaporators utilize blowers to force air in a counter current to a spray of water pumped to the top of a column and free falling downward. The evaporation rate is largely dependent on the water temperature and the dew point. This method is cost-effective and highly efficient when the waste stream to be evaporated is preheated by another process and the wastewater does not contain volatile compounds (VOCs) that would be readily transferred to the air, and thereby create air pollution. It is not recommended for water high in dissolved or suspended solids as they will deposit on the internals and block the water airflow.