Biochemical and oxidation parallel-connection mutual-preparation type medical wastewater treatment system and method

Abstract

The invention discloses a biochemical and oxidation parallel mutual backup type medical wastewater treatment system and method. In the treatment system, a pre-disinfection tank, a septic tank, a lifting pump station and an adjusting tank are sequentially communicated in series, a biochemical tank and a photocatalytic oxidation system are arranged in parallel, the inlet ends of the biochemical tankand the photocatalytic oxidation system are respectively communicated with the adjusting tank through a first electric valve and a second electric valve, and the outlet ends of the biochemical tank and the photocatalytic oxidation system are sequentially communicated with a sedimentation tank, a secondary disinfection tank and a water outlet pump station in series; and a residual chlorine monitor, a COD first online monitor and a sodium sulfite dosing pump are arranged in the adjusting tank, a COD second online monitor is arranged in the biochemical tank, and each monitor, the electric valvesand the dosing pump are respectively connected with a centralized controller. According to the technical scheme, effluent residual chlorine is stably controlled, COD reaches the standard, effluent isensured to stably reach the standard, ecological collapse is avoided, the stability of a medical wastewater treatment system is improved, the automation level is improved, and the comprehensive operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a biochemical and oxidation parallel and mutual preparation medical wastewater treatment system and a biochemical and oxidation parallel and mutual preparation medical wastewater treatment method. Background technique [0002] With the country's emphasis on environmental protection, a series of related policies and standards have been intensively introduced in recent years. Throughout the country, although the environmental protection requirements of various regions and industries are different, and the implementation steps are not consistent, it can be seen that industrial upgrading is imperative; for enterprises, it is necessary to continuously improve technology, realize industrial upgrading, and reduce pollutant emissions. [0003] Specifically, take the design and operation of hospital infectious disease medical wastewater treatment system as an example to illustrat...

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Problems solved by technology

[0007] (4) The best disinfection effect should be achieved after pre-disinfection, and the virus cannot be detected. Therefore, the amount of chlorine added to the pre-disinfection pool is strictly implemented according to the design amount. In actual operation, the residual chlorine in the adjustment pool often exceeds 0.5mg / L, which is not satisfied. Enter the biochemical pool conditions

In actual operation, the manual measurement of residual chlorine in the adjustment tank is frequent and may cause omissions

Due to the large fluctuations in the actual measured value of residual chlorine in the adjustment tank, the dosage of sodium sulfite is uncontrollable, and most of the time it is excessively added. After the reaction, the residual concentration of sodium sulfite fluctuates in a large range

[0009] (6) In view of the situation in (5), the residual concentration of sodium sulfite in the water entering the subsequent secondary disinfection pool is uncertain, resulting in frequent adjustment of the dosage of chlorine-containing liquid in the secondary disinfection pool, large consumption of chlorine-containing liquid, and residual Chlorine control is unstable

[0010] (7) In view of the situation in (5), manual detection cannot achieve real-time continuous detection results, which may cause omissions, which is a potential hidden danger of the biochemical pool

[0011] (8) In view of the situation in (7), in case of omissions, the residual chlorine exceeds the standard and the sodium sulfite dosing is not turned on, which will directly cause the biochemical system to collapse

[0012] (9) The actual operating water quality and water volume fluctuate greatly, which has a great impact on the biochemical system, and the backup biochemical system also has insufficient shock load resistance, and may not be immediately replaced and put into use

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