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…
1.What is eutrophication of water bodies?Eutrophication of water bodies is a natural phenomenon that occurs in freshwater when there is an excessive presence of nitrogen, phosphorus, and potassium, leading to sudden and excessive growth of algae. 2.What are the basic methods of wastewater treatment?The basic methods of wastewater treatment involve using various techniques and processes…
Cleaning a dissolved air flotation unit is crucial for its proper functioning. Incorrect cleaning procedures can negatively impact the machine and its components, hindering effective wastewater treatment. Here are some key steps to follow during the initial startup, explained in a more accessible manner: Prepare the wastewater tank: Before starting the unit, add lime powder…
一、Definition of oily wastewater Oily wastewater refers to wastewater that contains fats (fatty acids, soaps, fats, waxes, etc.) and various types of oils (mineral oils, animal and vegetable oils). Oily wastewater is characterized by high levels of chemical oxygen demand (COD) and biochemical oxygen demand (BOD), a certain odor and color, flammability, easy oxidation and…
In the field of environmental engineering, wastewater treatment is a critical process for ensuring the protection of our water resources. Among the various technologies available, Dissolved Air Flotation (DAF) has emerged as a highly effective method for removing contaminants from wastewater. In this article, we will delve into the advanced applications of DAF in wastewater…
With the continuous growth of the global population and economic development, the food industry has become one of the most important industries in the world. However, the large volume of wastewater generated by food processing not only contains significant amounts of organic matter and nutrients, but also may harbor harmful substances such as heavy metals,…
As the demand for chemical products in daily production and life continues to rise, the chemical industry has experienced rapid development. However, this growth has also led to increasingly serious environmental issues, particularly the significant discharge of wastewater from chemical production that has resulted in severe water pollution in rivers surrounding chemical parks. According to…
During the operation of a wastewater treatment plant, staff members often observe a substantial amount of garbage in the bio-tank, secondary settling tank, and other areas. This not only affects the aesthetics but also significantly impacts the equipment operation, such as water pump blockage, abnormal mixer sounds, sludge suction machine blockage, among others. So, what…
The sudden increase in COD and BOD in effluent from secondary settling tank can indicate malfunctioning of wastewater treatment process, caused by both external and internal factors. To identify the characteristics of harmful substances, it is necessary to measure sewage COD first. The phenomenon of increased COD and BOD5 values in the effluent from the is mostly…