What Is Dissolved Air Flotation? Dissolved air flotation (DAF) is a water treatment technology often used for the pretreatment of source water, but what exactly does it entail and how does it fit in with other technologies? DAF is a type of coagulation-flocculation technology typically used before filtration. In dissolved air flotation (DAF), fine bubbles attach themselves to suspended…
The Sequential Batch Reactor (SBR) has emerged as a popular wastewater treatment method employed in municipal facilities, industrial plants, and small-scale domestic systems. In this article, we will delve into the SBR process, examining its underlying principles, operational workflow, and the advantages it offers in various applications. I. Principles of the SBR Process: The SBR…
The phenomenon of sludge flotation occurs in the secondary clarifier when activated sludge undergoes denitrification, causing the formation of sludge clusters that float to the surface or sludge particles that float and overflow with the effluent. On the other hand, sludge bulking is caused by poor settling performance of activated sludge. When the sludge-water mixture…
With the rapid development of industrialization and urbanization, wastewater discharge has become a significant environmental issue. Organic pollutants in wastewater pose a severe threat to the environment and human health. Therefore, it is crucial to explore efficient and feasible wastewater treatment technologies. Fenton’s method, as a chemical oxidation technology, has the capability to efficiently remove…
Wastewater treatment has become a crucial environmental measure aimed at effectively removing and treating the wastewater generated from human activities. Its purpose is to ensure the sustainable utilization and protection of water resources. With the rapid pace of urbanization and population growth, the importance of wastewater treatment is increasingly evident. This article will discuss the…
Textile dyeing and printing wastewater refers to the wastewater generated during the dyeing and printing processes in the textile industry. The wastewater is discharged from all four stages of the dyeing and printing process. In the pretreatment stage (including processes such as scouring, desizing, boiling, bleaching, and mercerization), desizing wastewater, boiling wastewater, bleaching wastewater, and…
Due to the complex and diverse composition of organic matter in wastewater, it is difficult to individually determine the quantitative values of each component. In practice, composite indicators are commonly used to indirectly represent the amount of organic matter in water. There are two categories of composite indicators that represent the organic matter content in…
High TDS (Total Dissolved Solids) wastewater poses a common and challenging environmental issue. High TDS indicates elevated levels of dissolved salts and minerals in wastewater, potentially posing risks to the environment and water resources. This article examines the primary sources, impacts, and common removal techniques for high TDS wastewater, aiming to provide solutions for efficient…
DAF equipment is commonly made of either carbon steel or stainless steel. While stainless steel is often preferred in the food industry, the cost factor often leads to the predominant use of carbon steel. However, after several years of usage, carbon steel equipment may develop rust, ranging from minor corrosion to severe degradation, potentially compromising…
I. Introduction to Mixed Liquor Suspended Solids (MLSS)Mixed Liquor Suspended Solids (MLSS), also referred to as mixed liquor suspended solid concentration, represents the concentration of activated sludge in the mixed liquor. It indicates the total mass of solid particles in the activated sludge per unit volume of the mixed liquor. The units of measurement are…