Method for processing high-toxicity high-concentration highly salt-containing organic waste water with biochemistry combination process of catalytic oxidation

Abstract

The invention belongs to the water treatment technical field, in particular to a method for treating high-toxicity high-concentration high-salinity organic wastewater by a process of combining catalysis, oxidation and biochemistry. The method comprises the following specific steps that: wastewater enters a triple-effect distillation desalter; a pressure of the distillation desalter is controlled between 9 and 11 KG; a temperature of the distillation desalter is controlled between 85 and 95 DEG C; a water body is pretreated by a grating well and an adjusting tank and enters a micro electrolytic oxidation and oxidation tank by a lifting pump; the treated water automatically flows into a hydrolysis acidification tank, and the dwell time of water power is between 12 and 15 hours; the addition amount of combined type fillers is 50 to 70 percent of a usable capacity of the hydrolysis acidification tank; the treated water coming out from the hydrolysis acidification tank enters an oxygen compatible tank of an A / O tank; simultaneously, activated sludge is pumped into the oxygen compatible tank, and the dwell time of water power is between 5 and 8 hours; effluent water enters an aerobic tank by a circulating pipeline; the dwell time of water power in the aerobic tank is between 10 and 15 hours; the addition amount of suspended fillers is 30 to 40 percent of a volume of the aerobic tank; water treated by the A / O tank flows into a secondary sedimentation tank; the effluent water is discharged; and the residual sludge is discharged. The method applies the triple-effect distillation technology to the wastewater treatment technology and is organically combined with the subsequent catalysis oxidation technology and the biotreatment technology, thereby providing a brand-new development idea for the wastewater treatment of the type.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for treating highly toxic, high-concentration and high-salt organic wastewater by a catalytic oxidation biochemical combination process. Background technique [0002] With the rapid growth of my country's economy, various forms, various types, large discharge volumes, and complex water quality wastewater emerge in an endless stream in national production and life. High-salt pesticide wastewater is an important part of it that may cause serious impact on the environment. ; This new type of practical water treatment technology is a new type of high-efficiency combined treatment technology for high-salt pesticide wastewater. [0003] The treatment of high-salt pesticide wastewater has the following difficulties: [0004] (1) High salt content: Excessive salt content in water will have a strong inhibitory effect on the growth of microorganisms in the wate...

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Problems solved by technology

[0004] (1) High salt content: Excessive salt content in water will have a strong inhibitory effect on the growth of microorganisms in water, making it difficult for conventional biological treatment to work

[0005] (2) Complex composition: Due to the complexity of the process in the production process, the wastewater produced is highly complex, and it is difficult for conventional wastewater treatment processes to achieve ideal results.

[0006] (3) High treatment cost: The current treatment practice shows that the premise of using conventional biological treatment technology to treat this type of wastewater is to dilute this type of wastewater and control the salt content of the influent below 1%. Achieving the above goals will cause great waste of water resources and huge treatment facilities, resulting in increased system investment and increased operating costs

[0007] Therefore, it is the research of those skilled in the art how to successfully and effectively solve a series of long-term problems such as difficult operation, high complexity, high construction cost and high operating cost in the treatment of ultra-high salt-containing pesticide wastewater. Target

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