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Purpose of wastewater and sewage treatment

Industrial wastewater is based on the type of industry with chemical and toxic compounds that can not be directly discharged into rivers and lakes and must be purified beforehand in accordance with the standards of the wastewater treatment plant. The industrial waste water and plant wastewater depends entirely on the type The plant has a factory. Sewage treatment processes.

۱- Primary treatment of sewage.

This method involves the separation of components from the sewage system, which can create problems in the maintenance and operation of refining systems. Conventional operations in this method include scavenging, granulation, balancing and operation of the pumping station, flotation and initial sedimentation. Sewage output at this stage usually has a high BOD, which is not sufficient due to the compliance with the principles of the Environmental Protection Agency.

کیمیا پلیمردنا

۲٫ Biological treatment of wastewater:

The biological treatment of industrial wastewater is also one of the standard and acceptable methods worldwide that is used for reuse and recycling of water in industrial plants. The purpose of this stage of purification is to isolate degradable organic matter and suspended solids. Types of microorganisms such as yeasts, bacteria, fungi, etc. can be effective on pollutants. The usual practice is to use this method. A) Biological biological aerobic treatment, which includes the flotation of microorganisms (such as activated sludge) and the fixed field of microorganisms (such as filtering filters and rotary biological disks); b) biological anaerobic treatment

کیمیا پلیمردنا

۳٫ Sewage chemical treatment:

At this stage of sewage treatment, we consider the processes in which the chemical reaction generates change. In wastewater treatment, the processes of the chemical unit are usually combined with the operation of the physical unit and the biological unit processes. Brand to meet purification objectives. One of the inherent weaknesses of most of the chemical processes, compared with other purification methods, is that the process is carried out with chemical additives and often to separate the material from the wastewater, adds. As a result, there is always a net increase in wastewater soluble components.

If refined sewage is to be returned to the consumption cycle, this can be a major deterrent. Conventional operations in this method include coagulation, flocculation, physicochemical deposition (which is accomplished by coagulant injection).

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