The sludge in the water purification plant is composed of the backwash drainage from the filter tank and the solids in the sludge drainage from the sedimentation tank or clarifier. Sewage plant sludge is a sedimentary material produced during wastewater treatment.

Sludge treatment and disposal technologies in sewage treatment plants mainly include: concentration and dehydration technology, anaerobic digestion technology, aerobic fermentation technology, sludge thermal drying technology, lime stabilization technology, and sludge pyrolysis treatment technology.

At present, the main treatment methods of printing and dyeing wastewater include three categories: physical chemical treatment, chemical treatment and biological treatment. The following will analyze the application of various treatment technologies in the treatment of printing and dyeing wastewater.

Dissolved air flotation process (DAF process) is an efficient and fast method for separating solid particles from water and wastewater.

Activated sludge is a general term for microbial populations and the organic and inorganic substances to which they are attached. Activated sludge treatment method is a sewage treatment process.

At present, the precipitation method is the most important fluorine-containing wastewater treatment method. Among them, the precipitation method can be divided into chemical precipitation method and coagulation precipitation method.

Coagulation = coagulation + flocculation, usually the agents that play the role of coagulation and flocculation are collectively referred to as coagulants. So I think as long as you understand the two concepts of coagulation and flocculation, you can distinguish coagulation and flocculation.

Water pollutants refer to substances that can change the physical and chemical properties of the water body, cause the water body to deteriorate, and affect the changes in the biological community structure or biological community composition.

Since the wastewater formed by the waste paper and papermaking process contains many pollutants, it is necessary to treat the wastewater in the process of wastewater formation and discharge. This article will specifically analyze the wastewater treatment technology in the waste paper and papermaking process.

Waste paper making generally uses waste cardboard, waste newspapers, etc. as the main reproducing raw materials, which are used to produce whiteboard paper or cardboard paper and other products.

The methods of dealing with sudden organic pollutants mainly include physical and chemical methods such as adsorption and oxidative decomposition.

Generally, wastewater treatment methods include physical, chemical, physical-chemical and biological methods.The above several oil extraction wastewater treatment methods have their own advantages in technology and economy.

The main components of the wastewater produced in the process of oil production in the oil field are crude oil and a small amount of organic substances as oil production aids. The conventional oil production wastewater treatment process in the oil field is basically three steps of "oil separation - flotation - filtration".

The sources and places that discharge or release pollutants into water are called water pollution sources, which are the main culprits of water pollution. Water pollution sources can be classified from different angles.

At present, coagulation sedimentation method is one of the main methods in physicochemical wastewater treatment. Followed by flotation method, flotation method is also called air flotation method.

Hydroxyethyl cellulose (HEC) Used as adhesive, surfactant, colloid protective agent, dispersant, emulsifier and dispersion stabilizer. It has a wide range of applications in coatings, inks, fibers, dyeing, papermaking, cosmetics, pesticides, mineral processing, oil extraction and medicine. 

Hydroxyethyl cellulose (HEC), chemical formula (C2H6O2) n, is a white or light yellow, tasteless and non-toxic fibrous or powdery solid. It has been widely used in the fields of oil exploitation, coating, construction, medicine and food, textile, papermaking and polymer polymerization.

the production processes of flocculants: 1. Hydrolysis method: Compared with the copolymerization method, the water-soluble anti-dandruff factor (HD) of the products prepared by the general hydrolysis method is not high, less than 30%. 2. Aqueous solution polymerization, 3. Inverse emulsion polymerization.

There are many factors affecting the flocculation effect, mainly including the type, concentration, amount of flocculant, stirring condition during coagulation treatment, pH value, temperature and its changes, etc. Different countermeasures should be adopted according to the specific situation.

The changes of flocculants that lead to the decline of flocculation performance under adverse conditions are generally referred to as degradation, and are specifically manifested as molecular weight reduction, solution viscosity reduction, poor flocculation performance or even failure. Flocculants must be formulated and used carefully to prevent these problems.