Methylene dithiocyanate wastewater treatment method

Abstract

The invention relates to a wastewater treatment method, in particular to a treatment method for wastewater of methylene dithiocyanate production. The method adopts a photolysis, demulsification, iron-carbon micro-electrolysis and SBBR (sequencing batch biofilm reactor) combined process and has the characteristics of relatively simple process, high treatment efficiency, easiness in implementation and maintenance, low operation cost and the like; the methylene dithiocyanate wastewater treated with the treatment method can be drained up to the standard.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a treatment method for producing dithiocyanomethane waste water. Background technique [0002] Dithiocyanomethane is a non-oxidative broad-spectrum bactericide and algicide, which has a good killing effect on various fungi, algae and bacteria, and is one of the broad-spectrum bactericidal drugs widely used at home and abroad. Dithiocyanomethane production wastewater contains surfactants, thickeners and sodium thiocyanate, etc., with complex components, high pollutant concentration (COD is 20g / L), residual fungicide products and a large amount of heterocyclic organic compounds, which belong to High concentration refractory biodegradable wastewater. If such wastewater is discharged without treatment, it will cause water pollution, so the treatment of dithiocyanomethane wastewater must be strengthened. [0003] Dithiocyanomethane wastewater has poor biodegradability, and the residual f...

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Problems solved by technology

If such wastewater is discharged without treatment, it will cause water pollution, so the treatment of dithiocyanomethane wastewater must be strengthened

[0003] Dithiocyanomethane wastewater has poor biodegradability, and the residual fungicides in the water have strong inhibitory and toxic effects on microorganisms in the biochemical treatment system, so it is not suitable to use traditional biochemical methods for treatment

In addition, wastewater also contains a lot of organic matter that is difficult to biodegrade, so it is difficult to achieve ideal results by simple pretreatment and biochemical treatment.

At present, there are few studies on dithiocyanomethane wastewater at home and abroad, and there is still a lack of mature and efficient treatment technologies. Some processes have disadvantages such as complex processes, high treatment costs, and large investment. Some technologies cannot completely degrade toxic components, which may easily lead to secondary pollution.

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