{"id":795,"date":"2013-12-23t15:26:54","date_gmt":"2013-12-23t21:26:54","guid":{"rendered":"https:\/\/snyder-associates.u5fz9z3h-liquidwebsites.com\/?post_type=snyder-projects&p=795"},"modified":"2023-08-01t14:14:34","modified_gmt":"2023-08-01t19:14:34","slug":"sac-city-wastewater-treatment-plant","status":"publish","type":"snyder-projects","link":"\/\/www.dicovercards.com\/projects\/sac-city-wastewater-treatment-plant\/","title":{"rendered":"sac city treatment plant renovations renew timeworn wastewater system"},"content":{"rendered":"

budget-conscious upgrades provide wastewater solution<\/strong><\/span><\/h2>\n

initially constructed in the late 1970s, sac city\u2019s wastewater treatment<\/a> plant and some of its critical components had reached the end of their useful life. working closely with city leaders and the iowa department of natural resources<\/a> (dnr), a team from snyder & associates determined that the plant could be upgraded using a significant amount of the existing facility, while also incorporating the rotating biological contactors (rbc) technology city staff was familiar with. when fully implemented, these renovations would save the municipality both time and money.<\/p>\n

since the wastewater facility was functional but outdated, our experts needed to decide what original aspects could be saved and what needed to be replaced. using a comprehensive facility plan, we determined that the two final clarifiers and the chlorine disinfection tank could remain in service with proper renovations.<\/p>\n

additionally, reconfiguring the facility\u2019s current building \u2014 which housed labs, offices, headworks, treatment area, and a chlorine disinfection room \u2014 to fit the recommended updates, significantly reduced the project\u2019s overall cost and timeline. with these funds added back into the budget, the city was able to afford the significant upgrades necessary to update its system for better quality and efficiency.<\/p>\n

new facility layout creates infrastructure space<\/strong><\/span><\/h2>\n

although our team tried to preserve as much of the original physical plant as possible, multiple features were beyond restoration and required a complete replacement or significant upgrades.\u00a0after renovating the expansive building, our team brought in upgraded equipment and components to replace the outdated systems. this included two new rotary fine screens and a vortex grit removal system that serves as the facility\u2019s headworks. additional improvements were made to the chlorination\/dechlorination disinfection system, with storage upgraded to meet modern standards.<\/p>\n

in the same building, each of the six existing rotating rbc units was replaced due to age. this update maximized the facility\u2019s total biological and hydraulic capacity and increased treatment quality.<\/p>\n

irregular inflow and infiltration (i\/i) & biosolids treatment inadequacies addressed<\/strong><\/span><\/h2>\n

with a history of high flows and irregular inflow and infiltration (i\/i), it was imperative that our designs accommodate these concerns. as a mitigation effort, a synthetically lined five-million-gallon flow equalization basin was constructed toward the west end of the treatment complex. with this basin in place, the facility can operate within its hydraulic capacity and treat excess wastewater once flows have decreased.<\/p>\n

for years the original facility had been plagued by inadequate biosolids treatment and storage capacity<\/a> issues that were creating operational difficulties. our team remedied this problem by installing pumps to move the biosolids from the final clarifiers to combined aerobic digesters and storage units. the addition of the pumps resulted in a significant improvement by providing finite system control. also, existing biosolids components were significantly upgraded, including the construction of a new blower building and a new biosolids storage and treatment system<\/a>.<\/p>\n

other facility upgrades included:<\/strong><\/p>\n