Biosolids are a byproduct of the wastewater treatment process. Once wastewater reaches a treatment plant, the effluent goes through a number of physical, chemical and biological processes to clean the wastewater and remove the wastewater solids. The solids are then collected and further treated or stabilized to reduce odors and control pathogens and other organisms capable of transporting disease.

The treatment process a wastewater facility employs to stabilize the wastewater solids will result in either Class A or Class B biosolids, depending on the methods used. Upon completion of the stabilization process, the material, either in a solid, semi-solid or liquid state, can be referred to as biosolids ready for application as a fertilizer or soil amendment.

Siemens offers a  range of biosolids stabilization processes, and is an industry leader in both anaerobic digestion and open bin composting. Our Stabilization technologies include:

• Anaerobic digestion systems to reduces sludge volume and reduces pathogens to Class A or B levels
• Aerobic digestion systems to reduces volume and removes pathogens
• Municipal composting systems 
• Digester gas holding and processing equipment for collecting valuable methane gas to be used as fuel

Siemens provides pilot treatment systems and analytical testing to document the effectiveness of treatment and stabilization prior to installation. We also provide parts and service on all of our equipment, as well as equipment which may have been provided by other manufacturers.

 Biosolids 101
 Municipal Biosolids Solutions