T&A Mämmelä Oy T&A Mämmelä Oy was founded in 1998 to serve customers in the environmental technology industry. Decades of experience of the company's staff and hundreds of completed projects guarantee a strong foundation for our expertise. We also have extensive experience from our European partners. In connection with our operations, we manufacture e.g. BIOROTORS , STAIRCASES AND PREFABRICATED WASTEWATER TREATMENT PLANTS , as well as German IFU FINE BUBBLE AERATORS and Japanese SLUDGE DRYERS . In addition, we implement wastewater treatment plants and their renovations as KVR, complete and mechanical contracts. The company's premises are located in Kalajoki and have an area of approximately 2000m 2 . During its operations, the company has become one of the leading and most reliable implementer options in its industry.