The Process and Water Quality Specialists

Surface Water
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Rinconada Planning & Preliminary Design

CDM/ Santa Clara Valley Water District

Trussell Technologies, Inc., is aiding the Santa Clara Valley Water District (SCVWD) in the planning and preliminary design for the Rinconada Water Treatment Plant (RWTP) upgrade. The District’s main goals for the upgrade are to improve the reliability of the RWTP and to create a robust process that will comply with current and anticipated regulations. Trussell Technologies helped the District identify appropriate technologies, develop a list of alternative treatment trains, and evaluate the strengths and weaknesses of the alternatives. One principal reason for Trussell Technologies’ participation in this project stems from their expertise in water quality, and understanding its importance in the selection of treatment processes. This expertise was especially relevant given the challenging and variable water sources that are treated at RWTP (including Delta water sources).

Ultimately, the project team selected a treatment train incorporating raw water ozonation for oxidation and disinfection, along with conventional flocculation and sedimentation basins with plate clarifiers to replace the existing upflow clarifiers. After selection of the preferred alternative, Trussell Technologies developed sizing criteria for the unit processes including ozone generation and contactors, chemical feed systems, flocculation and sedimentation. To estimate the O&M cost requirements, Trussell Technologies calculated energy, chemical, and labor requirements for the processes using both data from the District and process information from equipment vendors.

The current economic environment has forced many utilities to evaluate and streamline their operations to maximize energy efficiency. To aid the District in this task, Trussell Technologies is measuring one of the increasingly important metrics of energy usage: greenhouse gas (GHG) emissions. This analysis will quantify the important sources of GHG emissions at the RWTP, and help the District prioritize which processes to focus on to lower both their operating expenses and carbon footprint. This study will also be used for regulatory purposes to quantify the GHG emission consequences of the upgrade.