Tag: physical
Introduction In municipal and industrial wastewater treatment, the precision of chemical dosing is directly linked to process compliance, yet the longevity of the dosing equipment is often compromised by material mismatching. A common point of failure in chemical feed systems is not the mechanical drive mechanism, but the degradation of wetted parts due to unforeseen […]
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 misconceptions in municipal wastewater engineering is that positive displacement (PD) pumps are immune to the hydraulic sensitivities that plague centrifugal systems. While it is true that double disc pumps (DDP) are robust, self-priming, and capable of handling high solids, they remain subject to the fundamental laws of fluid mechanics. […]
INTRODUCTION A frequent failure mode in municipal water and industrial wastewater applications is not the catastrophic burst of a casing, but the silent, cumulative degradation of insulation and mechanical seals due to thermal stress. Engineers often prescribe Variable Frequency Drives (VFDs) to improve energy efficiency, assuming that slowing a pump down inherently reduces stress on […]
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 In the realm of municipal wastewater treatment and industrial slurry handling, the double disc pump has carved out a niche as a robust solution for difficult fluids containing solids, rags, and grit. However, a surprising number of these installations fail prematurely, not due to mechanical inadequacy, but because of improper Variable Frequency Drive (VFD) […]
Activated Carbon Filtration: Removing Contaminants from Water Article Overview Article Type: Informational Primary Goal: Provide municipal engineers, wastewater treatment operators, plant designers, and equipment manufacturers with a technical, implementation-focused guide to activated carbon filtration covering mechanisms, contaminant scope, design calculations, operational practices, monitoring, regeneration and disposal options, vendor selection, and real-world performance data so they […]
Introduction In the complex hydraulics of a modern wastewater treatment plant (WWTP), the peristaltic pump—often referred to as a hose pump or tube pump—occupies a critical niche that centrifugal technologies cannot fill. While engineers are intimately familiar with pump curves for water transfer, the specification of positive displacement equipment for abrasive sludge or off-gassing chemicals […]
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 The integration of Variable Frequency Drives (VFDs) with non-clog wastewater pumps has become the standard for modern municipal lift stations and treatment plants. While VFDs offer significant benefits regarding energy efficiency, flow matching, and reduced mechanical stress during startup, they introduce complex thermal challenges that are often underestimated during the design phase. A critical […]