Sludge desliming water post-treatment method

Abstract

The invention provides a sludge desliming water post-treatment method, belonging to the technical field of water treatment. A flocculating agent is added into sludge desliming water to be treated, then the sludge desliming water is sent into a flocculation tank, wherein the flocculation tank, an air flotation tank and a solid-liquid separation tank are sequentially communicated to complete flocculation, air flotation and solid-liquid separation, the solid-liquid separation tank is provided with a section and a slag scraper, the solid-liquid separation tank is communicated with the air flotation tank through the section, the slag scraper is positioned at the top of the solid-liquid separation tank and scrapes scum on the top of sewage, the water outlet of the solid-liquid separation tank isconnected to a filter group, and the outlet water is filtered for many times at the filter group after being dosed by a sodium hypochlorite dosing system and then transported to a water outlet tank.After the sludge desliming water post-treatment method is applied to sludge removal post-treatment, after stable operation, the water quality indexes of suspended matters, COD, PAM, ammonia nitrogen,total nitrogen, total phosphorus and the like in water can reach above Class III surface water, and safe discharge can be realized.

Description

technical field [0001] The application relates to a post-treatment method for sludge deslimed water, which belongs to the technical field of water treatment. Background technique [0002] In the water treatment industry, the sludge produced after the source water is treated contains a large number of pathogens, microorganisms, heavy metals and other pollutants. If it is not treated in time, it will easily cause secondary pollution. Therefore, many technologies around sludge treatment have emerged as the times require. However, the sewage generated by separating from sludge during the sludge dehydration process also has the same secondary pollution problem. It contains many pathogenic microorganisms, as well as heavy metal organic matter, if not handled properly, it is easy to become a threat of environmental pollution. The traditional direct discharge or reflux treatment methods are likely to cause secondary pollution of source water. Desilted water containing silt is dir...

AI Technical Summary

Problems solved by technology

However, the sewage generated from the separation of the sludge during the sludge dehydration process also has the same secondary pollution problem

It contains many pathogenic microorganisms, as well as heavy metal organic matter, if not handled properly, it is easy to become a threat of environmental pollution

Traditional direct discharge or reflux treatment methods are likely to cause secondary pollution of source water

Desilted water containing silt is directly discharged into rivers, which will also cause river siltation

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