Water purification treatment method based on adsorption and solid-liquid separation

Abstract

The invention belongs to the technical field of multistage treatment of water, wastewater or sewage, and discloses a water purification treatment method based on adsorption and solid-liquid separation. Organic pollutants in water are treated by a specific surface area of powder active carbon; the organic pollutants in the water are transferred from a dissolved state to a suspended state by adsorption, so that organic matter subjected to phase transfer is attached to the active carbon, and then a water purification process is realized through physical separation by a microfiltration membrane. Turbid substances, calcium, iron and high-stability organic complex compounds of the turbid substances, calcium and iron are removed in coagulation, pre-oxidation and activated carbon adsorption processes, so that influence on the membrane flux is reduced; and the use time and the membrane flux of the microfiltration membrane are improved by using the activated carbon as the adsorbent to treat a pre-oxidizing agent influencing the chemical structure of the membrane. According to the invention, poly aluminum chloride (PAC) is utilized to effectively reduce low-molecular-weight organic matters inwater, so that the soluble organic matter is transferred to a solid phase; and the PAC and the organic matter adsorbed on the PAC can be well separated from water, so that quality of feed water is ensured.

Description

technical field [0001] The invention belongs to the technical field of multi-stage treatment of water, waste water or sewage, and particularly relates to a water purification treatment method based on adsorption and solid-liquid separation. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: At present, with the rapid development of industrialization and urbanization in my country, the urban water environment in my country has been polluted to varying degrees. Or seriously polluted, the urban surface water supply presents the characteristics of highly stable polluted water sources formed by natural organic matter (NOM), synthetic organic matter (SOC) and heavy metals under the influence of the background material of the water source. development bottleneck. On the other hand, the improvement of residents' living standards also puts forward higher requirements for water quality. For more than 90% of the water plant...

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Problems solved by technology

[0003] To sum up, the problem existing in the prior art is that the traditional water purification treatment process is not effective in removing natural organic matter, especially humus or dissolved organic carbon membrane filtration process that promotes the precursors of disinfection by-products. In the experimental stage, the domestically produced membrane filtration water purification process is not widely used

The simple use of MF filtration has serious membrane pollution, and the removal effect of disinfection by-product precursors is weak. PAC is often used in emergency treatment of drinking water, and the separation process in conventional processes such as sedimentation is slow. Poor operation can easily cause PAC to enter the filter tank and be damaged. Penetrating through the filter to form black water, affecting the sensory indicators of water supply

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