Category: Secondary Treatment
In the realm of wastewater treatment, the rectangular primary clarifier is an essential first-stage component designed to reduce solids and organic loads by way of sedimentation. This process facilitates the removal of settleable solids and particulate matter from wastewater before it undergoes further treatment or purification steps. The design and operation of rectangular primary clarifiers […]
Trickling filters are a well-established method for treating wastewater, offering a reliable way to reduce the amount of organic material before it is returned to the environment or reused. These systems involve a biological process where microorganisms attached to a medium break down pollutants in the water. Their simple yet effective design makes them suitable […]
Sequencing batch reactors (SBRs) are a sophisticated and flexible method of treating wastewater that employs a fill-and-draw mechanism. Unlike conventional continuous-flow systems, SBRs handle the various stages of wastewater treatment—equalization, aeration, and sedimentation—in a single reactor by operating in timed sequences. This technology adapts to fluctuating wastewater volumes and compositions, providing high levels of contaminant […]
Jet aerators are an essential component in the field of wastewater treatment, leveraging the power of high-velocity jets to integrate oxygen into sewage or industrial effluent. The technology efficiently meets the oxygen needs of microorganisms in activated sludge processes, which play a pivotal role in the decomposition of organic matter. As a byproduct of this […]
Lamella clarifiers are an integral component in the realm of wastewater treatment, providing a significant function in the clarification process by separating solids from liquids. They operate on the principle of sedimentation, where the gravitational force compels particles to settle at the bottom due to their higher density compared to water. The unique design of […]
Rotating Biological Contactors (RBCs) are an efficient means of treating wastewater through a biological process that involves microorganisms affixed to a rotating media. These systems are engineered to remove organic and nitrogenous waste from water by allowing microorganisms to come into contact with waste in the water. An RBC system consists of a series of […]
Secondary clarification is an integral step in the wastewater treatment process, focusing on separating biological floc or sludge from the treated water after the primary treatment and biological processes have taken place. This phase is crucial as it determines the quality and clarity of the effluent, leading to the release of safe water back into […]
Aeration is a critical process in the treatment of wastewater, involving the introduction of air into sewage to allow aerobic bio-degradation of the pollutant components. It is a vital part of most biological wastewater treatment systems; microorganisms in the wastewater need oxygen to break down organic matter into harmless by-products. Oxygen is supplied through aeration, […]
Safe drinking water and effective wastewater treatment are critical for protecting public health and the environment. Chemical technologies play an important role alongside physical and biological treatment methods. This article provides an overview of key chemical processes used, design considerations, and challenges for further improvement. Chemically-enhanced sedimentation (coagulation and flocculation) is used to remove suspended […]
Biological treatment in wastewater management is a process that mimics the natural purification mechanisms found in the environment. It involves using microorganisms, such as bacteria and protozoa, to break down organic matter in sewage or industrial effluents. This method is favored for its efficiency in reducing the load of pollutants and its role in the […]