Tag: hydraulic design
INTRODUCTION In municipal water, wastewater, and industrial fluid transport systems, gate valves are the quintessential isolation mechanism. However, a common misconception plagues piping design: the assumption that because gate valves are typically operated either fully open or fully closed, calculating their flow coefficient is unnecessary. This oversight makes Gate Valves Sizing and Selection: Cv one […]
Introduction For decades, the default solution for moving wastewater and sludge has been the non-clog centrifugal pump. However, as modern wastewater streams become increasingly burdened with fibrous materials (“flushable” wipes) and solids content rises due to enhanced thickening processes, the traditional centrifugal curve is often pushed to its limit. Engineers frequently encounter a critical decision […]
Introduction In the realm of municipal wastewater treatment, the handling of thickened sludge, scum, and septage presents a persistent challenge: the increasing prevalence of non-dispersible solids. While engineers frequently turn to positive displacement technologies for these viscous fluids, Double Disc Pump Clogging and Ragging: How to Reduce Blockages remains a critical operational concern. Despite being […]
Introduction to PC Pump Intake Hydraulics One of the most persistent and expensive failure modes in municipal wastewater treatment plants involves the premature destruction of progressive cavity (PC) pump stators. While often blamed on “bad rubber” or manufacturing defects, a significant percentage of these failures are actually hydraulic issues rooted in the civil and mechanical […]
Introduction One of the most persistent and costly failures in municipal wastewater collection systems is not the mechanical failure of the pump itself, but the failure of the intake hydraulics. Engineers frequently specify high-efficiency, robust pumping equipment, only to place it into a geometry that guarantees reduced lifespan. A significant percentage of premature bearing failures, […]
INTRODUCTION One of the most persistent and costly misconceptions in municipal and industrial water treatment is viewing a wet well merely as a concrete holding tank. In reality, the wet well is a complex hydraulic structure that dictates the reliability of the pumping equipment. A startling number of premature pump failures—often attributed to “defective manufacturing”—are […]
Introduction One of the most frequent points of failure in municipal pumping infrastructure involves the misapplication of pump geometry to the wet well environment. While submersible non-clog pumps dominate small to medium sewage lift stations, engineers frequently turn to vertical turbine pumps (VTPs) for high-flow, high-head, or footprint-constrained applications. However, a staggering number of these […]
Introduction to Intake Hydraulics For municipal and industrial engineers, the physical geometry of a pump station is often treated as secondary to the selection of the pump itself. However, industry data suggests that nearly 30% of premature pump failures—manifesting as vibration, cavitation damage, and bearing wear—are directly attributable to poor intake conditions rather than mechanical […]
FACILITY BASIC INFORMATION Plant Name: Boulder Water Resource Recovery Facility (formerly 75th Street WWTF)Location: 4049 75th Street, Boulder, Boulder County, ColoradoOperating Authority: City of Boulder Utilities DepartmentDesign Capacity: 25.0 MGD (Hydraulic)Current Average Flow: ~13.5 MGDPopulation Served: ~108,000 residents (plus substantial commercial/industrial/university base)Service Area: City of Boulder and Gunbarrel Improvement DistrictReceiving Water Body: Boulder Creek (Segment […]
Introduction Clarification remains the ubiquitous workhorse of municipal and industrial wastewater treatment, yet the specification of clarifier mechanisms is frequently reduced to a “copy-paste” exercise from previous projects. This oversight often leads to substantial long-term consequences: hydraulic instability, premature drive failure, and chronic solids carryover that threatens permit compliance. In the United States market, two […]