Grease trap tank
The function of this tank is to separate grease of cooking activity of households.
Grease from food processing can prevent oxygen absorption process from the air into water, effects the self-purification. In addition, grease can destroy structure of activated sludge in aeration tank, as it causes difficulties  for sludge fermentation process.  Therefore, grease trap tank will reduce the amount of grease and oil in wastewater to ensure stable operation for the following treatment units. The amount of oil and grease after separation will be collected into the grease container and the treated wastewater will flow into the air tank by itself.