Category: Blog

INTRODUCTION The vast majority of municipal flood control and large-scale raw water intake infrastructure in North America was constructed between the 1950s and 1980s. Today, engineers face a critical ticking clock: massive concrete volute or vertical column axial flow pumps are reaching the end of their second or third lifecycle. The challenge is rarely as […]

Effluent Discharge Standards: Compliance and Best Practices Article Overview Article Type: How-To Guide Primary Goal: Equip municipal managers, plant operators, design engineers, and equipment manufacturers with a practical, technically rigorous roadmap to interpret effluent discharge standards, design and operate treatment systems to meet permits, implement reliable monitoring and reporting, and future-proof facilities for emerging contaminants […]

1. Introduction In the water and wastewater industry, the failure of screw pumps—whether large Archimedes lift pumps or progressive cavity sludge pumps—often stems not from hydraulic inadequacy, but from thermal mismanagement of the drive system. A surprising statistic from motor reliability studies indicates that for every 10°C rise in operating temperature above the rated limit, […]

Introduction One of the most expensive misunderstandings in wastewater treatment and industrial fluid handling is the assumption that all pumps behave hydraulically like centrifugal pumps. This misconception is particularly dangerous when applied to positive displacement (PD) technology. While a centrifugal pump simply stops flowing when discharge pressure equals its shutoff head, a progressive cavity (PC) […]

INTRODUCTION In municipal water distribution and wastewater treatment, the vertical turbine pump (VTP) is a workhorse, valued for its efficiency and small footprint. However, when paired with Variable Frequency Drives (VFDs) without rigorous thermal and mechanical analysis, these systems frequently suffer from premature failure. A surprising industry statistic suggests that up to 30% of vertical […]

Introduction Nitrogen limits are the driver behind most secondary treatment upgrades in the United States, and the anoxic zone is where nitrogen actually leaves the plant. Nitrification converts ammonia to nitrate, which changes the form of the nitrogen without removing any of it. Only denitrification — the reduction of nitrate to nitrogen gas by heterotrophic […]

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 In the realm of municipal wastewater treatment and industrial sludge handling, the failure of a positive displacement pump during its first month of operation is rarely a manufacturing defect; it is almost invariably a failure of specification or startup protocol. Engineers often treat positive displacement (PD) pumps like centrifugal pumps, assuming a “bump and […]

Introduction In municipal wastewater lift stations and industrial effluent sumps, the submersible pump is often the most critical yet least visible asset. Because these units operate beneath the liquid surface, visual inspection during operation is impossible. Engineers and operators must rely on external data and performance anomalies to identify impending failures. A large share of […]

Clarifier Tanks: How They Separate Solids in Treatment Article Overview Article Type: Informational Primary Goal: Explain how clarifier tanks remove and concentrate suspended solids in wastewater, provide the engineering principles and design parameters used to size and operate clarifiers, and give practical troubleshooting, retrofit, and vendor selection guidance for municipal and industrial wastewater professionals Who […]