一、PAC and PAM Polyaluminum chloride (PAC), also known as basic aluminum chloride or hydroxy aluminum chloride, is widely used to treat wastewater or sludge. It can quickly form large particle precipitates from colloids in wastewater or sludge, which can be easily separated. The molecular formula of PAC is [Al2(OH)nCl6-n]m, where n is any integer from…
During the daily operation of the sewage system, why do the bacteria in the biochemical tank die? In addition, how do we determine the bacteria have died? Today, I will analyze the reasons and hope to be helpful to you. 一、Conditions affecting microbial bacterial growth Microbial bacteria are affected by factors such as pH, temperature,…
一、What is a sewage regulating tank? A sewage regulating tank refers to a structure used in wastewater treatment to regulate the flow of incoming and outgoing water. It is often used in industrial wastewater stations, industrial park sewage plants, and similar facilities. 二、How important is a sewage regulating tank? This is very important, especially for…
The main toxic effect of high concentrations of chloride ions on biological wastewater treatment is through the increased environmental osmotic pressure, which damages the cell membrane and enzymes inside microbial cells, thereby disrupting the physiological activities of microorganisms. Microorganisms grow well under isotonic conditions, such as in a NaCl solution with a mass concentration of…
When a sewage treatment facility is put into formal use, its biochemical treatment equipment needs to be inoculated and acclimatized (commonly known as commissioning). For larger-scale sewage treatment facilities, it is important to shorten the commissioning time as much as possible, so that the treatment process can be put into normal operation as soon as…
Activated sludge aging is common in most aerobic biochemical systems, and the aging of activated sludge leads not only to an increase in the major pollution indicators of the effluent, but also to a waste of energy. Due to the aging of activated sludge, excessive aeration and low loads tend to cause excessive energy consumption….
Dissolved air flotation is a common sewage treatment device, which works well to remove impurities. But how to keep the DAF in good working condition is a problem faced by many users. I will show you how to do this through this article. 1. One of the factors affecting the DAF effect is the degree…
Multi-disc sludge dewatering machine, referred to as screw stacking machine, is a water treatment system widely used in municipal sewage treatment projects and petrochemical, light industry, chemical fiber, papermaking, pharmaceutical, leather and other industrial industries. Filtration equipment first appeared during the European Industrial Revolution in the 19th century. The earliest industrial filtration equipment that came out…
In fact, filter presses produce excellent cake dryness and, in many cases, higher cake dryness compared to other filtration equipment. What is “silt”?Simply put, “sludge” is a semi-solid slurry that can be produced from a variety of industrial and municipal processes.The purpose of sludge dewatering is to reliably and efficiently concentrate waste into a filter…
Precipitation is the chemical conversion of soluble substances (including metals) into insoluble particles. Coagulation and flocculation causes a chemical reaction that promotes the formation, agglomeration or clumping of such particles to facilitate their removal from solution. The amount or dosage of a precipitant, coagulant and/or flocculant required to precipitate and remove metals in wastewater solutions is…