Treatment method of high-salt low-concentration organic wastewater

Abstract

The invention provides a high-salt low-concentration organic wastewater treatment method which comprises the following steps: adding activated and domesticated halophilic strain liquid into a biological contact oxidation device, and controlling the reaction time of the biological contact oxidation device and the adding amount of the activated and domesticated halophilic strain liquid, organic substances in the high-salt low-concentration organic wastewater are removed. The technical problem of how to treat the high-salt low-concentration organic wastewater at low cost is solved, and the treatment method of the high-salt low-concentration organic wastewater, provided by the invention, can provide a biological treatment way for treating the high-salt low-concentration organic wastewater with the salt content of 15-30%; the biological treatment efficiency of organic substances in high-salinity water is greatly improved; the investment cost of treatment facilities of the high-salt low-concentration organic industrial wastewater is greatly reduced; the operation cost in the high-salt low-concentration organic wastewater treatment process is greatly reduced; the tolerance concentration of microbial strains to salt substances is greatly improved, and the tolerance concentration of organisms to salt is improved by more than 15 times.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for high-salt and low-concentration organic wastewater. Background technique [0002] The main sources of high-salt wastewater are as follows: (1) Seawater: usually from the drainage or cooling circulating water in the process of industrial water use in coastal cities. (2) Industrial production: The main source of high-salt wastewater is the drainage produced in the production process of printing and dyeing, refining, oil extraction, pharmaceutical and salt production enterprises. (3) Salt-containing domestic sewage: It mainly comes from the utilization of seawater, and seawater is used in urban life for fire protection, road flushing, toilet flushing and other domestic miscellaneous water that does not come into direct contact with the human body. (4) Groundwater with high salt content: The groundwater in some areas has high salt content and high...

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Problems solved by technology

[0013] 3. Prospects for future treatment technologies of high-salt and low-concentration organic wastewater

[0015] In some industrial production processes, high-salt and low-concentration organic wastewater will be produced, such as some inorganic chemical industries, some fine chemicals, some electroplating industries, and high-salt and low-concentration organic wastewater after terminal membrane treatment of industrial wastewater. There is no requirement for salinity, but there are strict discharge requirements for organic pollutants such as COD; therefore, the above-mentioned high-salt and low-concentration organic wastewater is traditionally used in the process of evaporation or multi-stage membrane treatment to achieve the discharge of organic matter in the wastewater to meet the discharge standards; these traditional Method investment and operating costs are large

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