Tag: changes

INTRODUCTION One of the most persistent challenges in modern municipal water and wastewater engineering is the “digital gap” between mechanical process equipment and the central supervisory system. Engineers often specify high-efficiency pumps, advanced aeration blowers, and smart valves, only to find that the data these assets generate remains trapped in local silos. A surprising industry […]

Introduction In the hierarchy of critical decisions a process engineer makes during the design of a water or wastewater treatment facility, few specifications have as immediate a safety impact as fail positions. While pump curves and pipe sizing dictate the system’s efficiency during normal operation, the fail position of control valves and actuators dictates the […]

Introduction In municipal water and industrial wastewater treatment, the failure of a large-diameter isolation valve to close during a pipe burst, or the inability of a filter effluent valve to modulate flow accurately, can result in catastrophic flooding, permit violations, and massive financial losses. Yet, during the specification phase, the interface between the valve and […]

Introduction Municipal wastewater infrastructure in North America and Europe is facing a critical convergence: aging assets and evolving waste streams. A significant percentage of lift stations commissioned between 1970 and 1990 are reaching the end of their design life. Simultaneously, the composition of modern wastewater—laden with non-dispersible synthetics and wipes—is wreaking havoc on hydraulic designs […]

Introduction to Diaphragm Pump Economics For municipal and industrial engineers, the initial purchase price of a pump often dominates the procurement conversation. However, in the realm of positive displacement technology, fixating on the sticker price is a critical specification error. A detailed analysis of Diaphragm Lifecycle Cost: CAPEX vs OPEX and Energy Payback reveals that […]

Introduction For municipal engineers and utility operators, the “3:00 AM high water alarm” is a scenario that is all too familiar. In the modern wastewater environment, the composition of influent has shifted dramatically. The proliferation of non-dispersible synthetics—commonly known as “wipes”—combined with water conservation measures that increase solids concentrations, has rendered many legacy pump specifications […]

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 […]

Tighter permits and higher public scrutiny mean controlling nitrogen and phosphorus is a front-line operational issue for many utilities. This guide to nutrient removal wastewater gives municipal decision makers, plant designers, and operators straight answers on selecting, sizing, operating, and monitoring nitrogen and phosphorus control options, and when recovery makes sense. Expect engineering setpoints, performance […]

INTRODUCTION The axially split case centrifugal pump remains the workhorse of the water and wastewater industry. Its robust design, high flow capabilities, and relative ease of maintenance—allowing access to rotating assemblies without disturbing piping—make it a staple in raw water intakes, high-service pump stations, and large-scale cooling loops. However, despite their inherent durability, these assets […]

Introduction One of the most persistent and costly issues in municipal wastewater management is not the failure of the pump itself, but the mismatch between the pump’s hydraulic design and the system’s actual operating requirements. Industry data suggests that nearly 70% of centrifugal pumps in wastewater applications operate significantly outside their preferred operating region (POR). […]