What is the main benefit of Class B - PSTP for biosolids treatment?

The main benefit of Class B - Process to Significantly Reduce Pathogens (PSTP) for biosolids treatment is its effectiveness in significantly reducing pathogens to levels that are considered safe for land application. This treatment process allows for the safe recycling of biosolids as a soil amendment or fertilizer, ensuring that the potential health risks associated with pathogens in untreated biosolids are minimized.

Class B biosolids are treated in a way that reduces pathogens to appropriate levels, making it safer for application on agricultural land and other areas. This treatment does not focus on the complete elimination of pathogens but instead aims to lower them to a level where they pose minimal risk to human health and the environment.

In contrast, while the reduction of heavy metals and improving the aesthetic quality of biosolids are important for certain aspects of biosolid management, they are not the primary focus of Class B PSTP. Similarly, the complete elimination of all nutrients is not feasible nor desirable, as nutrients play a vital role in soil health and fertility. Therefore, the main advantage of Class B PSTP clearly lies in its capacity to ensure a safe level of pathogens in treated biosolids, promoting their safe use in various applications.