What is Activated Sludge?

Active sludge (activesludge) is a general term for the microbial community and the organic and inorganic substances to which they depend. In 1912, Clark and Gage of the United Kingdom discovered that activated sludge can be divided into aerobic activated sludge And anaerobic granular activated sludge, activated sludge is mainly used to treat sewage. Activated sludge process is a type of aerobic treatment method that uses suspended growing microbial flocs to treat organic sewage.

Complex microorganisms in activated sludge and

The microbial population mainly includes bacteria, protozoa and algae. Among them, bacteria and protozoa are the two main categories. Performance indicators of activated sludge include:

There are many factors that can affect the physiological activity of microorganisms

The activated sludge method consists of an aeration tank,

In actual operation of the activated sludge system, the water quality and quantity of sewage are constantly changing, and the environmental conditions are constantly changing. This requires adjustment and control according to the metabolic law of the microorganisms in the activated sludge, so that the system is at its best. run

1. The aeration tank has an odor. The aeration tank lacks oxygen supply, the DO value (dissolved oxygen) is low, and the ammonia nitrogen in the effluent is sometimes high. Increase the aeration.

2. The blackened sludge aeration tank is too small, organic matter

According to the current "Technical Policies for Urban Sewage Treatment and Pollution Prevention and Control": 1. The sludge generated from urban sewage treatment should be stabilized by anaerobic, aerobic and composting methods. It can also be disposed of properly using sanitary landfill methods. 2. The sludge produced by the secondary sewage treatment facilities with a daily processing capacity of more than 100,000 cubic meters should be treated by anaerobic digestion, and the biogas produced should be comprehensively utilized. Sludge from sewage treatment facilities with a daily processing capacity of less than 100,000 cubic meters can be composted and comprehensively utilized. For sewage treatment facilities using technologies such as delayed aeration oxidation ditch method and SBR method, the sludge needs to be stabilized. Sewage treatment facilities that use physical and chemical first-level enhanced treatment must have proper sludge treatment and disposal. 3. After the treated sludge meets the requirements of stability and harmlessness, it can be used on farmland; sludge that cannot be used on farmland should be disposed of in sanitary landfill according to relevant standards and requirements.