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…
Sludge is the byproduct separated from urban sewage treatment, which has a water content of over 85% in a liquid state, 65% to 85% in a plastic state, and below 60% in a solid state. Classification of Sludge Sludge can be classified based on the source, digestion, and composition. According to the source, it can…
Paper is a ubiquitous material in our daily lives, providing immense convenience. However, the treatment of wastewater generated from the paper industry has emerged as a crucial issue, not only for the industry, but also for society at large. Failure to effectively address this problem is limiting the survival and growth of paper manufacturing enterprises….
A multi-media filter uses one or more filtering media to effectively remove suspended impurities from water and clarify it under a certain pressure by passing turbid water through a certain thickness of granular or non-granular materials. Common filter media include quartz sand, anthracite, manganese sand, etc. It is mainly used for pretreatment of water treatment,…