Modified zeolite powder and raw water processing method thereof

Abstract

The invention relates to a modified zeolite powder and a raw water treatment method thereof, wherein the modified zeolite powder is formed by mixing the natural zeolite powder and modifying agent which comprises one or more substances of powdered activated carbon, diatomite, coal ash and clay; the modified zeolite powder is put into raw water to be treated. The modified zeolite powder and a raw water treatment method has the advantages that the modified zeolite powder is suitable for raw water treatment with different water qualities, can effectively remove pollutants such as ammonia-nitrogen and organic compounds and has certain capability of removing phenolic pollutants and a plurality of pollutants; with higher chemical activity and biological stability, the modified zeolite powder is fast in absorption speed, high in efficiency and has no secondary pollution; through wet type feeding, the modified zeolite powder is low in settling velocity, long in reaction time with the raw water, better in dewatering performance of sludge in sedimentation tanks after the treatment and the post treatment is convenient; the zeolite powder is low in cost, simple in manufacturing method, convenient in use and can reduce the construction difficulty and cost, which is suitable for sudden accidents of water contamination.

Description

technical field [0001] The modified zeolite powder and its raw water treatment method of the present invention belong to the technical field of environmental protection, and specifically relate to a modified zeolite powder used for raw water treatment and a method for using the modified zeolite powder as raw water treatment. Background technique [0002] At present, the main problem faced by my country's tap water raw water is that the raw water quality cannot fully meet the water quality standards for water intake. It is manifested in high ammonia nitrogen and organic matter often exceeds the standard, which brings great difficulties to the normal operation of water plants. [0003] Generally, biological treatment technology and zeolite ammonia nitrogen adsorption and regeneration technology are mostly used for the treatment of raw water ammonia nitrogen micro-polluted water bodies. Zeolite is a hydrous skeleton-type aluminosilicate mineral composed of silica and alumina te...

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Problems solved by technology

[0006] But this invention also has weak point: (1) use this technology, only ammonia nitrogen can be removed, and the pollutant in other raw water, as the reduction of raw water ammonia nitrogen and organic matter, phenols, does not mention; ( 2) The process has strict requirements on the ammonia nitrogen concentration and turbidity of the raw water to be treated. The ammonia nitrogen concentration is 1 to 2 mg / L, and the turbidity is 5 to 10 ntu, which limits the application of the whole process; (3) the invention The coagulant alum and ferric chloride used are all coagulants used by the waterworks itself to treat raw water, and the removal of ammonia nitrogen mainly depends on powdered zeolite; (4) the sedimentation speed of wet dosing powdered zeolite is faster , which reduces the interaction time with sewage, thus affecting the treatment effect of ammonia nitrogen removal