What is Activated Sludge? How do you make it?

A variety of chemicals can be used for sludge deep dewatering treatment, and the following common agents will be used for ordinary sludge dewatering: cationic polyacrylamide: this is a polymer flocculant, which can flocculate small particles in the sludge into larger particles through adsorption and bridging, and improve the sedimentation performance and dewatering performance of the sludge.

Polyaluminum chloride: This is an inorganic polymer coagulant, which can coagulate with impurities in the sludge to form an insoluble precipitate, so that the water in the sludge is separated. Lime:

Lime can neutralize with the acidic substances in the sludge, adjust the pH value of the sludge, and promote the cohesion and settlement of the sludge. Diatomaceous earth: Diatomaceous earth has the characteristics of porosity and high specific surface area, which can be used as a filter aid to improve the filtration performance and dewatering performance of sludge.

Things to look out for....

Activated sludge is a sludge rich in a large number of microorganisms, generally referring to aerobic activated sludge, light yellow-brown, earthy smell. In the process of degrading organic pollutants, they can grow on their own.

It is widely used in domestic sewage treatment plants, and the vast majority of sewage plants in China are this process.

Activated sludge contains bacteria, fungi, protozoa and other aggregates, and has good sedimentation performance.

What do you want to do with sludge?

If the amount is small, you can cultivate it in a beaker, take some domestic sewage, add some river mud, aerate and blast aeration, and put some nutrients every day, such as steamed bread and rice, and you can do it in a few days.

The first stage of the activated sludge methodThe organic pollutants in the sewage will be adsorbed on the surface of the microbial pellet by the activated sludge particles, due to its huge specific surface area and polysaccharide viscous substances. At the same time, some macromolecular organic matter is decomposed into small molecule organic matter under the action of bacterial extracellular enzymes.

The activated sludge method is an aerobic biological treatment method for sewageIts principle is mainly to make use of the metabolic action of microorganisms

Phase IIUnder the condition of sufficient oxygen, microorganisms absorb these organic matter, synthesize some of the organic matter into new cellular matter, and oxidize and decompose the other part of the organic matter. The organic pollutants in the sewage are removed due to degradation, and the activated sludge itself continues to multiply and grow, which can be said to kill two birds with one stone.

The principle of the activated sludge method is that the microorganisms eat the organic matter in the sewage, so that the sewage becomes clean water. It is essentially similar to the self-purification process of water bodies in nature in Chipai, while Chendan is only artificially strengthened, and the effect of sewage purification is better.

Activated sludge is a general term for microbial communities and the organic and inorganic substances they attach to, discovered by Clark and Gage in the United Kingdom in 1912, activated sludge can be divided into aerobic activated sludge and anaerobic granular activated sludge, activated sludge is mainly used to treat wastewater. Activated sludge method is a kind of aerobic treatment method that uses suspended microbial flocs to treat organic sewage.

In industrial wastewater treatment, organic wastewater under aeration conditions will produce a kind of floc, i.e. activated sludge, after a period of time. Activated sludge is a group of aerobic microorganisms after a large number of reproduction, and its organisms are relatively complex, mainly bacteria, protozoa, fungi, metazoans, etc., these groups and some inorganic matter, undecomposed organic matter and residues of microbial metabolism constitute activated sludge.

The so-called activated sludge is that these sludges contain a large number of microorganisms, which can degrade harmful substances in sewage, such as ammonia, nitrogen, COD, BOD and other indicators.

Activated sludge is a flocculent mass of mud formed by a variety of microorganisms, the most important of which is bacteria.

A general term for microbial communities and the organic and inorganic substances to which they are attached

Definition of technical terms.

Chinese name: activated sludge English name: activated sludge; Activated sewage definition 1:

Sludge-like flocs formed by various organisms such as bacteria, fungi, protozoa, and metazoans, and inorganic substances such as metal hydroxides. It has good adsorption, flocculation, biological oxidation and biosynthetic properties. Applied Disciplines:

Ecology (first-level discipline); Pollution Ecology (Secondary Discipline) Definition 2: A flocculent mixture composed of microorganisms that degrade organic pollutants and suspended solids and colloidal substances in sewage. Applied Disciplines:

Fisheries Science (first-level discipline); Fishery Environmental Protection (Secondary Discipline) Definition 3: Contains the microbial community used to purify wastewater and the organic matter adsorbed by it.

Activated sludge is the main agent in the activated sludge treatment system, which uses its metabolism to convert organic pollutants into stable inorganic substances.