Go through the stages of wastewater treatment with the main character - Active Sludge! Remove foreign objects at the mechanical cleaning level, convert Ammonium Nitrogen to Nitrite, and then to Nitrate at the aeration tank levels.
GSP Game consists of several mini-games. While playing the game, you can learn the general treatment process, its sequence and dependencies, practise clearing the water from pollutants.

Web version for PC
Mobile version for Android