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Waster Water Treatment Reduce Pollution By Purifying Waste Water

Wastewater treatment is the use of physical, chemical and biological methods of wastewater treatment, so that waste water purification, reduce pollution, so as to achieve wastewater recovery, reuse, the full use of water resources. The process of separating or converting pollutants from waste water into harmless substances.

1. Physical Treatment Method

The waste water treatment method, which is separated by physical action and recycled in the waste water, which contains the suspended state pollutants (including oil film and oil beads), can be divided into gravity separation method, centrifugal separation method and sieve-filter interception method. The treatment method based on the principle of heat exchange also belongs to the physical treatment method.

2. Chemical Treatment Method

By chemical reaction and mass transfer to separate and remove the dissolved, colloidal state of pollutants in the wastewater or to convert it to harmless substances in the wastewater treatment method. In chemical treatment, the treatment unit based on chemical reaction of adding medicament is: coagulation, neutralization and redox, and the treatment unit based on mass transfer is: extraction, stripping, blowing, adsorption, ion exchange, electrodialysis and reverse osmosis. The latter two kinds of processing units are called membrane separation technology. The process unit using mass transfer has both chemical and related physical functions, so it can be separated from the chemical treatment and become another kind of treatment method called Physicochemical method.

3. Biological Treatment method

Through the metabolic action of microorganisms, the organic pollutants in the wastewater, such as solution, colloid and micro suspension, are transformed into a stable and harmless waste water treatment method. According to the different microorganisms, [1] The biological treatment method can be divided into two types: aerobic biological treatment and anaerobic biological treatment. Wastewater biological treatment is widely used in aerobic biological treatment method, according to the traditional aerobic biological treatment method is divided into activated sludge and biofilm method two categories. Activated sludge method itself is a processing unit, it has a variety of operating methods. The treatment equipment belonging to Biofilm method has biological filter, biological turntable, biological contact oxidation tank and recently developed bio-fluidized bed. Biological oxidation pond is also called natural biological treatment method. Anaerobic biological treatment method, also known as biological reduction treatment, is mainly used to treat high concentration organic wastewater and sludge. The processing equipment used is mainly the digestive pool.

Process requirements: The existing first-class treatment process to strengthen the treatment effect of the transformation, the transformation should be based on the actual situation, the full use of existing treatment facilities, the existing hospital to use more septic tank, contact pool in the structure or operation of the mode of transformation, if necessary, to add some facilities, as far as To meet emission standards for wastewater treatment.

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