Tag: treatment
Introduction In municipal and industrial water treatment infrastructure, the reliability of auxiliary equipment often dictates the resilience of the entire process. While massive raw sewage lift pumps garner the majority of capital planning attention, the failure of miscellaneous pumps—seal water systems, polymer feed pumps, sampling units, and dry-pit sump pumps—frequently triggers permit violations or costly […]
Introduction In the hierarchy of wastewater treatment equipment, process pumps often receive the bulk of engineering attention. However, the humble dewatering pump acts as the critical fail-safe for plant operations. Engineers frequently encounter a scenario where a tank needs emergency draining, or a gallery floods during a storm event, only to find the portable or […]
Introduction In municipal water and industrial wastewater treatment facilities, pressure instrumentation is the sensory nervous system of the process. Yet, a surprising number of process upsets, pump protection failures, and chemical dosing errors can be traced back to a single, often overlooked component: the diaphragm seal (or chemical seal). Engineers frequently treat these isolation devices […]
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 Municipal engineers frequently underestimate the complexity of chemical injection at remote lift stations. While the primary sewage pumps receive the bulk of the design attention, the auxiliary chemical feed systems are often the critical defense against the wastewater industry’s most pervasive enemies: hydrogen sulfide ($H_2S$) corrosion, noxious odors, and Fat, Oil, and Grease (FOG) […]
Introduction Peristaltic pumps (often referred to as hose pumps or tube pumps) are frequently selected for their ability to handle aggressive chemicals, viscous sludge, and shear-sensitive fluids in water and wastewater treatment. However, despite their mechanically simple design—typically involving a rotor compressing a hose—they present a unique set of operational challenges. A surprising industry statistic […]
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) […]
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 […]