Suspended ceramsite-activated carbon double-layer filter and its application to raw water treatment

Abstract

The invention discloses a suspended ceramsite-active carbon double-layer filtering tank and a method for applying the filtering tank in treating raw water. According to the invention, a water inlet tank and a water distribution tank of the suspended ceramsite-active carbon double-layer filtering tank are respectively positioned above and below a up-flow suspended ceramsite-active carbon double-layer filtering tank body on a same side; a water outlet tank is positioned above the side opposite to the water distribution tank; the water distribution tank communicates with the lower end of the up-flow suspended ceramsite-active carbon double-layer filtering tank body through a water distribution hole; a water distribution zone, a gas-flushing gas distribution pipe, a membrane pore aeration pipe, a lower filtering mesh, a suspended ceramsite bed, a filtering plate, an active carbon bed, and a water outlet zone are sequentially arranged in the filtering tank body from bottom to top. According to the invention, with a bio-membrane in the filtering material, ammonia nitrogen, organic substances and odor are biodegraded with dissolved oxygen in water; the suspended ceramsite under the filtering plate can retain most of turbidity under a micro-expanded state, and heavy metals such as iron, manganese, and thallium can be removed though catalytic oxidation on the surface of the ceramsite; the active carbon on the filtering plates adsorbs under a low-turbidity condition, such that adsorption capacity can be maintained, and an emergency effect can be developed. Therefore, deep purification can be realized upon water to be filtered.

Description

technical field [0001] The invention relates to slightly polluted water treatment, in particular to a suspension ceramsite-activated carbon double-layer filter and a method for treating raw water using the same. Background technique [0002] Aiming at water sources that are slightly polluted by ammonia nitrogen and organic matter, the ozone-biological activated carbon advanced water treatment technology is often used at home and abroad. After the sand filter unit of the conventional water purification process of "coagulation-sedimentation-sand filtration-disinfection", an activated carbon adsorption pool is added. , forming an advanced treatment process of "coagulation-sedimentation-sand filtration-activated carbon adsorption-disinfection" to further adsorb and remove organic micro-pollutants. When the water temperature exceeds 5°C, the biofilm on the activated carbon can degrade organic matter and nitrated ammonia nitrogen, so the activated carbon adsorption pool is also ca...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the problems existing in the prior art and provide a suspended ceramsite-activated carbon double-layer filter that avoids the problem of filter blockage in the middle activated carbon pool

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