Method for removing nitrates in water by floc resin formed by reconstruction of powder resin

Abstract

The invention discloses a method for removing nitrates in water by a floc resin formed by reconstruction of a powder resin. The method comprises the following steps: the nitrate content in water is detected; if the nitrate content exceeds the standard, a coagulant is added to a flocculation tank and the powder resin is simultaneously added to reconstitute the coagulant and the powder resin to formthe resin floc; and the nitrates in the water are adsorbed by the resin floc in a precipitation tank, and after reaching adsorption saturation, the resin floc settles to the bottom of the tank to remove the resin floc from the water. Any equipment is not needed to add, when sudden nitrate exceeding the standard happens, treatment equipment of an original water plant is used, removal of the nitrates can be realized by adding the powder resin and increasing an addition amount of the coagulant in the water plant, and water quality requirements for outlet water are met.

Description

technical field [0001] The invention mainly relates to the field of water treatment, in particular to a method for removing nitrate in water by reconfiguring powdered resin to form floc resin. Background technique [0002] In recent years, with the continuous improvement of people's living standards, water safety, especially the sanitation and safety of drinking water, has received more and more attention. Small and medium-sized water plants, especially some small water plants that use traditional techniques, generally use Conventional water treatment process, the conventional water treatment process basically has no ability to remove nitrate, and the excess of nitrate is only usually seasonal, often seasonal, the number of days in a year is more than ten days and it is sudden For example, in the Shandong area, when there is abundant rainwater at the lower level, the external water source will enter the reservoir. Due to the pollution of the water source, the nitrate concent...

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Problems solved by technology

For the addition of adsorption materials, on the one hand, it is necessary to solve the problem of adsorption efficiency, and on the other hand, it is necessary to solve the problem of secondary pollution. Therefore, for the safety of water quality, particle adsorption materials that do not react with water are often used, and the particle size is mostly at the millimeter level. In order to facilitate the later stage The density needs to be greater than that of water to be removed by sedimentation, causing the particles to sink to the bottom of the tank soon, and will be removed from the sedimentation tank as sediment before reaching its saturated adsorption capacity, and it is difficult to exert the non-adsorption effect

[0004] For adding equipment, there are only more than ten working days a year, which leads to low utilization rate of equipment, and daily maintenance of equipment, and requires more land occupation, which puts great pressure on the economic cost of small and medium-sized water plants. Therefore, conventional treatment methods It is not suitable as an emergency treatment measure to deal with sudden pollution, and it is difficult to promote it. It is also difficult for regulatory agencies to supervise due to the short time. Mandatory installation of nitric acid removal equipment does not conform to the trend of the times, and it is only mandatory installation without supervision. Equipment maintenance, long-term idle will also cause secondary pollution to the water body

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