Treatment system and method for high-salt wastewater

Abstract

The invention discloses a wastewater treatment system for treating highly salt-contained wastewater and a treatment method thereof, which belongs to the field of water treatment. The system comprises a biological treatment sub system and a salt crystallization sub system, wherein the biological treatment sub system is formed by the order connection of an anoxia pond, an aeration pond and a membrane biological reactor, wherein the anoxia pond is provided with a wastewater inlet through which the highly salt-contained wastewater is introduced to the anoxia pond, the inner parts of the aeration pond and the membrane biological reactor are both provided with aeration heads connected with an air compression device, and the membrane biological reactor is provided with a after-filter water outlet pipeline for water discharging; and the after-filter water outlet pipeline of the membrane biological reactor of the biological treatment sub system is connected with a water inlet of the salt crystallization sub system, and the salt crystallization sub system is provided with a salt crystal outlet and a reutilized water outlet. By utilizing the membrane biological reactor, the system solves the problem that because the sedimentation performance of the highly salt-contained wastewater is poor in the biological treatment sub system, the quality of the discharged water is poor; and by the salt crystallization sub system, the system reclaims salt, thereby obtaining salt resources and avoiding water pollution.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a sewage treatment system and a treatment method for treating high-salt wastewater. Background technique [0002] Due to the lack of fresh water resources, the utilization rate of sea water is gradually increasing, and the salt content in sewage is gradually increasing; some heavy polluting industries, such as petrochemical, printing and dyeing, textile, pharmaceutical and other chemical manufacturing industries, meat, seafood and dairy products processing The salt content in the sewage discharged by enterprises and other enterprises is also relatively high. Salt wastewater has the characteristics of large water volume and wide range of involvement. Because the biological method is more economical to treat wastewater, biological methods are often used to treat high-salt wastewater, but the biological treatment will be affected by the salt content in the water, and the in...

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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the purpose of the embodiment of the present invention is to provide a sewage treatment system and treatment method for treating high-salt wastewater, which can effectively To overcome the shortcomings of poor sludge settling performance and water pollution caused by high salinity in wastewater when biological methods are used to treat high-salt wastewater

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