Industrial Wastewater Pretreatment Facility, Naval Base Kitsap - Bremerton, WA
Wood Harbinger, as Prime A/E for the project, provided fully designed drawings and specifications to construct an Industrial Wastewater Pretreatment Facility (IWPF) encompassing treatment systems for hexavalent chromium, cyanide, heavy metal, oily wastewater, chelated, and acid/alkaline cleaning wastewaters, so that the treated effluent meets discharge limitations as specified in the proposed 40 CFR 438.17, Pretreatment Standards for New Sources (PSNS) under Subpart A, General Metals, of the Metal Products and Machinery Point Source Category.
In addition, prioritized wastewater reduction concepts were evaluated and designed for Building 873, as an additive bid item.
This project included the demolition of the existing IWPF, Building 871, and the transfer pipelines that route wastewater to this facility from Buildings 107, 857, and 873. Demolition included the removal of all concrete storage and treatment tanks at Building 871, one tank at Building 873, and contaminated soils from the tank systems.
Our final design included a state-of-the-art treatment system that uses chemical precipitation, ceramic crossflow microfiltration, and other technologies for the treatment of metal plating wastewaters.
As a preliminary task to the final design, a Functional Analysis Concept Development (FACD) was provided. The FACD included programming, analysis, and concept evaluation of the proposed technologies to treat the anticipated waste streams along with a preliminary Risk Assessment Code and cost estimate for the government to review and select the technologies to be employed. The evaluation included the comparison of redundant treatment trains in case of malfunction versus increased storage capacity. The FACD also included treatment for the cyanide and chelated waste streams, consideration of the cost, safety controls, space constraints, and an analysis of inclusion of the cyanide and chelated waste streams in the design of the treatment plant in place of sending the waste off site for treatment. The analysis addressed all issues for off site disposal, including storage tanks, costs, and required ancillary equipment.