What Are The Basic Methods of Sewage Treatment?
Jun 13, 2022
Sewage is an important problem that needs to be solved by environmental protection today. Because there are many pollutants contained in sewage, if it is not treated, it is likely to cause more serious pollution, so we must deal with it. So what are the basic methods of sewage treatment?
What are the pollutants in sewage?
There are many types of pollutants in the water, and they can be divided into inorganic, organic matter, and organisms according to their properties; according to their shape, they can be divided into suspension, colloidal, and dissolved substances; according to their characteristics, they can be divided into three categories: physical pollution Profit, chemical pollutants and bi pollutants.
Entry -level sewage treatment, there is no nonsense throughout the process, quickly collect, avoid finding it.
1. The physical pollutants in the water of physical pollutants mainly refer to suspended materials and thermal radioactive pollutants, which are mainly manifested in the pollution of suspension to water.
2. Chemical pollutants mainly include organic pollutants and inorganic pollutants.
Organic pollutants are divided into: ① carbohydrates, protein, amino acids and other organic non -toxic substances; ② organic and toxic substances, such as organic pesticides, polygon aromatic hydrocarbons, aromatic amine, etc.
Inorganic pollutants are divided into: ① inorganic non -toxic substances, which mainly include acid, alkali and some inorganic salts; ② Mermese, cadmium, lead, arsenic, chromium, sink, fluoride and other inorganic toxic substances. Chemical pollutants are the most important water pollutants.
3. Bio -pollutant Bio pollutants refer to the pathogenic microorganisms and other harmful creatures in wastewater, mainly including viruses, germs, parasitic eggs, etc.
Basic methods of sewage treatment:
The principle of sewage treatment is to separate or decompose various pollutants contained in wastewater from water, make it deteriorate, lose the characteristics of pollutant water, and thus purify the wastewater. According to its principles, modern sewage treatment technology can be divided into four categories: physical treatment, chemical treatment, physical chemistry treatment and biochemical treatment.
According to the degree of treatment, it can be divided into first -level treatment, secondary treatment and in -depth treatment: first -level treatment mainly removes oil, acid -base substances and interceptable suspension in water; second -level treatment mainly removes small suspension after the first -level processing of water medium -level processing after the first -level processing of the water mid -level processing. Objects, colloids and soluble organic matter, as well as most nitrogen phosphorus. In -depth treatment is to further remove pollutants that are not removed after the secondary treatment of the water mid -level, such as difficulty degradation of organic matter, heavy metal ions, nitrogen phosphorus and other inorganic substances.
A large amount of sludge is generated during the sewage treatment process. Smules contain a large amount of organic matter, bacterial, parasitic eggs, and heavy metal ions brought about by industrial wastewater, which require stability and harmless treatment.
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