Evaluation of Advanced Primary Treatment  Alternatives

Funded by Silicon Valley Clean Water Agency 

 

CWT has provided Technical Advisory to Silicon Valley Clean Water Agency (SVCW) to identify the impacts of Primary Filtration (PF) on the performance of the Water Resource Recovery Facility (WRRF). The performance of PF was first evaluated with a 6-month pilot study and feasibility of implementation of PF at the WRRF is assesed by using a process model (Sumo). In addition to the modeling efforts, hydraulic analysis of PF addition is conducted to determine if a gravity fed PF system will be feasible. The evaluation focused on the following areas:

 

• Capacity impacts 

• Digester gas production increase

• Aeration savings

 

Various scenarios were evaluated considering anticipated future effluent nitrogen limitations and implementing nutrient removal processes at SVCW. The study quantified the impacts of addition of the PF. 

 

The project is completed in 2024.