Category: Wastewater Treatment
Introduction: The Shift to Ultraviolet Disinfection One of the most persistent challenges municipal and industrial wastewater engineers face is balancing stringent disinfection requirements with the environmental and safety risks associated with chemical treatment. For decades, chlorine contact basins were the default standard. However, the regulatory tightening around disinfection byproducts (DBPs), the stringent limits on total […]
INTRODUCTION In municipal and industrial water infrastructure, an unyielding truth governs plant reliability: a multimillion-dollar treatment facility will routinely fail to meet compliance if a $5,000 chemical dosing skid underperforms. When addressing Chemical Feed Systems in Water Treatment: Design and Selection, engineers are often forced to balance severe operational extremes. These systems must consistently deliver […]
Introduction For decades, municipal and industrial wastewater treatment facilities relied on chlorine gas or sodium hypochlorite for final effluent disinfection. While effective at pathogen inactivation, traditional chlorination presents severe operational liabilities: the generation of toxic disinfection byproducts (DBPs) such as trihalomethanes (THMs) and haloacetic acids (HAAs), the requirement for costly dechlorination steps (typically using sodium […]
Introduction Aeration consumes more electricity than every other process in a wastewater treatment plant combined, typically 50 to 60 percent of total facility power, and it depends on equipment that degrades continuously and invisibly. A diffuser membrane does not fail on a date; it stiffens, fouls, and loses transfer efficiency over years while the blowers […]
Introduction Lagoon treatment systems serve more communities in the United States than any other single wastewater technology. They dominate the small-community market for a straightforward reason: a well-designed lagoon converts land area into treatment capacity, substituting cheap earthwork and long detention time for expensive mechanical equipment and skilled operator hours. For a town of 2,000 […]
Aeration system wastewater installations typically consume 45 to 60 percent of a municipal treatment plant energy budget and determine whether biological processes meet effluent nitrogen and BOD targets. This guide gives plant managers, process engineers, and operators a practical roadmap for selecting, designing, operating, retrofitting, and maintaining aeration system wastewater installations to maximize oxygen transfer […]
Introduction to Ozone System Engineering Ozone generation is one of the most chemically potent yet operationally complex technologies in the water treatment arsenal. Unlike UV or chlorination, ozone is generated on-site, requiring a sophisticated integration of power supply, gas preparation, cooling thermodynamics, and mass transfer mechanics. For municipal and industrial engineers, the challenge is rarely […]
1. Introduction In municipal and industrial wastewater treatment, the management of residual solids—commonly referred to as sludge handling—represents one of the most complex and cost-intensive portions of the plant lifecycle. While the liquid treatment train often garners the primary focus regarding effluent compliance, the solids handling train dictates operational efficiency, disposal costs, and often the […]
Comprehensive Odor Control Solutions for Wastewater Facilities Introduction Odor is the wastewater industry’s most visible failure mode. A plant can meet every permit limit on its discharge and still be judged a failure by the people who live downwind of it, because odor is the only aspect of treatment performance the public can perceive directly […]
PFAS chemicals have become a major concern for wastewater treatment facilities across the country. These synthetic compounds, known as “forever chemicals,” enter wastewater systems through industrial discharges, commercial operations, and everyday household products. Wastewater treatment plants receive PFAS from multiple sources including manufacturing facilities, car washes, industrial launderers, and residential use of products like stain-resistant […]