Product Spotlight - April 2020

Especially in recent years, municipal wastewater treatment plants have made significant investments on equipment for treating biosolids outputs. Even with this equipment, the output material is still often quite heavy and wet. In addition, the material typically only reaches a Class B biosolids quality designation, which limits the legal locations of disposal. This results in high transportation costs since disposal sites are often located in distant areas. 

Sedron Technologies recently introduced the Varcor system for managing those wastewater solids in a significantly more efficient manner. The company describes the process as a complete and holistic system that achieves 100% pathogen removal that enables nutrient recovery. Developed for dairy and agriculture applications, the technology is now being extended to wastewater treatment.

The technology is based on a process known as vapor recompression distillation. The solid and liquid fractions are separated through thermal evaporation, and the resulting vapor is sent to a compressor, where it undergoes mechanical recompression. The compressed vapor is then used as the heat source for the evaporation process; in transferring its heat, the vapor condenses and forms a water output.

The remaining vapor is concentrated and condensed into an ammonia solution. Due to the thermal process involved, the water, solids and concentrated constituents are guaranteed pathogen-free, according to the manufacturer. The technology offers reduced operating costs and yields byproducts that have inherent value and offer convenient use, according to the company. The process is not susceptible to biological or chemical upsets, making it versatile for integration into wastewater treatment plants with varied processes and equipment. It allows plants to easily add biosolids processing or take existing processing offline to ease loading on primary treatment steps. The process yields Class A biosolids.

Sedron also markets the system as a solution for septage haulers looking to avoid high processing fees for discharging material at municipal wastewater treatment plants. Stand-alone Varcor regional facilities can be established in nearly any location and are similar in size and process to gas stations. Waste haulers can access these sites 24/7. Upon entry, haulers can then empty their septic trucks for processing and would be charged a processing fee on a per gallon basis. Sedron can install and operate Varcor technology on a contract basis or users can purchase it outright as a turnkey system. 360-399-6193;


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