Activated carbon filter application in sewage and waste water treatment

A, activated carbon filter principle

activated carbon filter's job is done through the coal bed. Of coal activated carbon particles of the bed there are so many microporous and huge specific surface area, strong physical adsorption capacity. Water through the coal bed, organic pollutants in water by activated carbon adsorption effectively. Also activated carbon on the part surface of crystals can some of the oxygen tube, made by the coal bed of water was effectively activated carbon adsorption of organic pollutants.

in the working process of the adsorption on the surface activated carbon particles can form a layer of the surface of the balance concentration, under the action of surface concentration can the impurity adsorption of organic matter in the activated carbon particles, usually use activated carbon filter initial adsorption effect is very good, but as the lengthen of time, the adsorption capacity will continue to diminish, adsorption effect also drops. Usually if water turbidity of aquatic animals box, high content of organic matter in water, activated carbon filter will soon lose function. When using activated carbon filters, water treatment, therefore, should often clean and replace the activated carbon filter.

2, activated carbon filter main effect analysis in the process of sewage pretreatment:

1, adsorption was leakage of small molecule organic pollutants, such as peculiar smell, colloid and pigment, heavy metal ions in water and so on have more apparent adsorption removal effect;

2, remove the arsenic in the water and hydride, sulphide, residual chlorine and other high molecular compound and strontium, radium and other radioactive substances;

3, remove and kill the bacteria in the water and e. coli and other carcinogens;

4 grade filter before, can adsorption to remove residual chlorine in level to prevent the reverse osmosis membrane by the oxidative degradation;

5, reduce COD, can further reduce the SDI value of RO water, assure SDI< 5，TOC< 2. Oppm。

3, the adsorption effect and service life of activated carbon filter main factor analysis

kinds and concentrations of pollutants, the retention time of air flow in the filter material, the temperature and the humidity of the air. Activated carbon filter is a kind of commonly used water treatment equipment, water treatment desalination system as level after pretreatment can effectively guarantee the equipment service life and improve water quality, pollution prevention, especially to prevent reverse osmosis membrane, pollution of ion exchange resin and so on more than the free oxygen toxicity.

from a production standpoint, activated carbon filter is carbon steel lining plastic material and stainless steel material, because of carbon steel lining plastic price concessions, service life is long, so steel activated carbon has been widely used in water or wastewater treatment.