Yixing Fanghuizi Environmental Protection Equipment Factory

Home > news > Content

Can powdered activated carbon be used in sewage treatment?

Sewage treatment activated carbon 10 ~ 50 microns, density 0.36 ~ 0.74g / m3, is a weakly polar multi-empty adsorption material, strong adsorption, stable living function. The pore size of activated carbon is different, and the removal of organic matter with relative molecular mass of 500-3000 is better. At present, the activated carbon used in sewage engineering mainly includes wood charcoal, nut shell charcoal and coal charcoal. The research indicates that the adsorption function of charcoal and shell charcoal is obviously better than that of coal charcoal.

In the MBFB reaction system, powdered activated carbon (PAC) is a bioactive carbon (BAC) because it adsorbs a large number of microorganisms, so that PAC not only adsorbs and enriches small organic pollutants, but also adsorbs microorganisms by PAC. And protection, adsorption of dissolved oxygen by PAC, decomposition of small molecules by microbes under high concentration of pollutants and high dissolved oxygen, and bioregeneration of PAC. Powdered activated carbon PAC, microorganisms, dissolved oxygen, pollutants and other elements under high-strength fluidization, mixing, mass transfer, shearing, complete the efficient decomposition of micro-polluted small molecules organic matter.

1) Adsorption and enrichment of small molecular organic matter by powdered activated carbon PAC PAC can enrich pollutants to form part of high concentration zone, which is beneficial to microbial growth and decomposition of micro-polluted small molecular organic matter;

2) adsorption and protection of microbes by powdered activated carbon PAC;

3) Adsorption of dissolved oxygen by powdered activated carbon PAC, followed by the diameter of the activated carbon particles becoming smaller, the specific surface area being added, and the adsorption of dissolved oxygen by PAC is getting stronger and stronger;

4) The decomposition of small molecules by microorganisms, the adsorption and enrichment of MBFB by microorganisms, pollutants and dissolved oxygen by PAC; the protection of microorganisms by PAC enables microbes to use trace organic pollutants as the basis The substance dissolves oxygen as an electron acceptor, decomposes the organic matter in the micro-polluted water body, and completes the deep purification of the water;

5) The biological regeneration of powdered activated carbon PAC, the biofilm on the surface of activated carbon has oxidative decomposition effect on the adsorbed organic matter, and can be biodegraded to restore the adsorption capacity of activated carbon to complete the biological regeneration of PAC. In the MBFB system, high-intensity three-phase mass transfer The mixing between turbulence, turbulence, shearing and activated carbon particles causes the aging biofilm on the surface of the activated carbon to continuously fall, so that MBFB adheres to efficient adsorption and biodegradation functions.

The coagulation method is generally used in the production of coagulants such as polyaluminum chloride [PAC], polyaluminum ferric chloride, polyferric sulfate, polyacrylamide, etc. to strengthen the accumulation of the appropriate value, so that the wastewater The suspended matter collects under the action of the coagulant and then sinks under the action of gravity to reach the progress of solid-liquid separation. Its purpose is to remove suspended organic matter. This approach can be useful to reduce turbidity in wastewater.

The advanced treatment of wastewater is the use of activated carbon to adsorb solute and colloid in water. When the wastewater passes through activated carbon with a large specific surface area, the pollutants in the water are adsorbed onto the activated carbon adsorbent, and then the pollutants are removed. The use of sewage recycling has become a trend in modern industry and the right way to ensure human livelihoods.