Tag: chemical
Advanced Oxidation Processes: Tackling Micropollutants in Wastewater Effluent Micropollutants in treated effluent are driving municipalities to add tertiary barriers, and advanced oxidation processes for wastewater are among the most effective but technically demanding options. This practical, evidence-driven guide explains how AOPs work, compares major platforms, lays out design and integration rules, and covers monitoring, byproduct […]
Sequencing Batch Reactor Best Practices: Design and Operational Tips for Operators If your plant struggles to hold nitrification, control solids, or keep energy costs down, this hands-on guide lays out sequencing batch reactor design best practices for operators and engineers who need actionable targets, not theory. You will get numeric design criteria (MLSS, SRT, cycle […]
Solids Dewatering Equipment Compared: Belt Presses, Centrifuges, and Screw Presses Choosing the right dewatering machine can make or break sludge handling costs and compliance; this solids dewatering equipment comparison cuts through vendor claims to show how belt presses, decanter centrifuges, and screw presses actually perform in the field. You will get practical, metric-driven guidance on […]
Municipal utilities face a narrow window to set credible PFAS monitoring before steady regulation and public scrutiny force expensive retrofits; this practical guide to pfas testing methods for municipalities focuses on what to specify in contracts, how to prevent field and lab contamination, and how to turn data into treatment decisions. It compares targeted LC-MS/MS […]
INTRODUCTION One of the most common, yet catastrophic, process failures engineers and operators encounter in biological wastewater treatment is the sudden loss of nitrification. Often, the culprit is not toxicity or temperature, but a failure to adequately design for pH and Alkalinity Control in Wastewater Treatment. While pH and alkalinity are frequently discussed interchangeably, treating […]
INTRODUCTION One of the most frequent and costly errors in municipal water and wastewater engineering is sizing a control valve to match the adjacent pipe diameter without performing proper hydraulic calculations. This “line-sizing” approach routinely results in valves that operate nearly closed, leading to severe control hunting, premature seat wear, and destructive cavitation. To avoid […]
INTRODUCTION For municipal consulting engineers, plant superintendents, and operators, a leaking pressure relief valve (PRV) is far more than a nuisanceβit is a continuous drain on operational efficiency, an environmental compliance risk, and an indicator of compromised system safety. While operators frequently blame the valve manufacturer when weeping or fugitive emissions occur, the engineering reality […]
Introduction One of the most common, yet catastrophic, oversight errors in municipal water and industrial wastewater treatment plants occurs at the chemical feed skid. Engineers often spend countless hours specifying the perfect metering pump or chemically inert control valve, only to default to standard-issue automation. When dealing with highly corrosive substances like sodium hypochlorite, ferric […]
The halo 5 water system is a UV-based treatment platform many utilities are evaluating for potable, reuse, and tertiary disinfection applications. This article delivers a technical breakdown of its architecture, hydraulics, lamp and control characteristics, and how delivered UV dose performs under representative water qualities, with head-to-head context against TrojanUV, Xylem Wedeco, and Evoqua. For […]
INTRODUCTION One of the most persistent and costly errors in municipal water and wastewater engineering is the practice of “line-sizing” control valves. When engineers default to matching a control valve’s diameter to the adjoining pipe size, the result is almost always an oversized valve. A poorly sized valve operating continuously between 10% and 20% open […]