THP Advanced Anaerobic Digestion for Compact and Efficient Biosolids Management in Cold Climates

In cold climates, outdoor wastewater treatment plants (WWTP) are challenged by weather conditions. Therefore, it is preferred to move facilities indoors, in e.g. rock caverns or tunnels underground. Sludge treatment for biosolids management in cold climates has been a great challenge in expensive space requirement and potentially unstable operation in winter time. Process intensification to achieve compact installation and operational stability are called for to ensure efficient biosolids management. In this paper, Thermal Hydrolysis Process (THP) to enhance Anaerobic Digestion (AD) for sewage sludge treatment is discussed in terms of compactness index and operational stability. Two cases using CambiTHP in Norway and China are described. With long term operational data in small to large scale projects, CambiTHP AD is a proven solution for compact and efficient biosolids management in cold climates.