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Medical wastewater disinfection and sterilization treatment method

A technology of disinfection and sterilization and treatment methods, which is applied in the treatment of pathogenic microorganism wastewater, water/sewage treatment, water treatment with special compounds, etc.

Inactive Publication Date: 2019-09-20
浙江森井生物技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor sterilization and disinfection effect of the medical wastewater treatment method in the prior art, and provide a new type of medical wastewater disinfection and sterilization treatment method integrating multiple disinfection and sterilization technologies

Method used

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  • Medical wastewater disinfection and sterilization treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A kind of medical wastewater disinfection treatment method, based on such as figure 1 The medical wastewater disinfection and sterilization treatment device shown includes an instrument electric control box unit (not shown in the figure, those skilled in the art can make model selection and installation position according to needs), and the device also includes the following units:

[0065] Mechanical filter unit 1, the water inlet communicates with the outlet of the medical wastewater source (usually refers to the secondary sedimentation tank);

[0066] The dissolved air generating unit 2 is located downstream of the mechanical filter unit 1, and is used to raise the dissolved oxygen of the wastewater, and the inlet port is connected with the outlet of the mechanical filter unit 1;

[0067] The reactor unit includes a reactor shell 5 fixed on the transfer support unit 4,

[0068] The micro-nano bubble release and aeration unit 3 is located downstream of the dissolved ...

Embodiment 2

[0084] The medical wastewater disinfection and sterilization method based on the disinfection and sterilization device of the present invention, its steps are as follows:

[0085] Step S1, the effluent of the medical wastewater source (secondary sedimentation tank) enters the mechanical filtration unit to remove particles with a particle size ≥ 25 μm in the water and reduce the SS value of the water quality;

[0086] Step S2, all or part of the water treated in step S1 enters the dissolved air generating unit, and the dissolved air generating unit dissolves the self-inhaled air (oxygen or ozone) in the water under a certain pressure to increase the dissolved oxygen concentration of the water;

[0087] Step S3, introducing the pressurized dissolved air water treated with dissolved oxygen (ozone) in step S2 into the micro-nano bubble release and aeration unit in the reactor shell, and the dissolved air water is released by the micro-nano bubbles and decompressed by the aeration u...

Embodiment 3

[0091] The anode unit uses three-dimensional porous nano-TiO 2 The steps of the preparation process of the photocatalytic plate are as follows: S1: Fully coat the fixed bed base material with the water-based adhesive, take it out and let it dry naturally in a dust-free environment;

[0092] S2: The fixed bed base material after step S1 is air-dried is coated with photocatalyst; The fixed bed base material adopts three-dimensional structural nickel foam;

[0093] S3: After the photocatalyst coating process is completed, dry in a medium temperature oven at 250-300°C for 1.5h;

[0094] S4, repeat steps S2 and S31 times.

[0095] Specifically, the conditions of the dust-free environment in step S1 are: ambient temperature ≤ 22°C, ambient humidity ≤ RH55%, the coating amount is 0.2g / cm2, and the water-based adhesive is processed from the following raw materials in mass percentage: 28% ethyl orthosilicate, 21% dehydrated alcohol, 1% hydrochloric acid, the balance is deionized wate...

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Abstract

The invention relates to a medical wastewater disinfection and sterilization treatment method. The medical wastewater disinfection and sterilization treatment method is based on a novel disinfection and sterilization treatment device. The medical wastewater disinfection and sterilization treatment method comprises the following steps of (1) decreasing an SS value of the water quality of medical wastewater source effluent; (2) improving a dissolved oxygen concentration of water; (3) making a micro-nano bubble release and aeration unit generate micro-nano bubbles with an average diameter of 24 [mu]m, wherein the dense scattered micro-nano bubbles buoy up particles in the water to a liquid level, the particles are removed by a particle collection and discharging unit, and meanwhile, dissolved oxygen in the water gains electrons in a cathode unit of a cathode cavity, and is subjected to a reduction reaction to generate H2O2 hydrogen peroxide; and (4) irradiating an anode unit with ultraviolet light, wherein electrons of a photocatalyst TiO2 semiconductor on an anode are excited for transition to form holes, while the electrons are transferred to the cathode unit under the action of an electric field, microorganisms lose electrons and are oxidized when adsorbing the holes or the anode and in contact with the holes or the anode, and water molecules are reacted with the holes or the anode to form .OH hydroxyl radicals, so that disinfection and sterilization treatment of medical wastewater is completed.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a medical wastewater disinfection and sterilization treatment method. Background technique [0002] Before the treated medical wastewater is discharged into the receiving water body, it must be sterilized to meet the water quality requirements for medical wastewater discharge. During the sterilization process, the relative resistance of microorganisms increases roughly in the following order: bacteria, viruses and parasitic cysts. Sodium hypochlorite, chlorine and chlorine dioxide, single ozone or ultraviolet light are mostly used for sterilization and disinfection at present. The former can kill viruses, but it cannot control parasitic contamination. In addition, chlorine can form halogenated disinfection by-products, and inadvertent storage and handling of on-site chemicals can present an explosion hazard. The latter ozone has a very short half-life after being dissolved in w...

Claims

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Application Information

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IPC IPC(8): C02F9/08B01J23/89
CPCC02F9/00B01J23/8906B01J23/002C02F1/001C02F1/44C02F1/24C02F7/00C02F1/4606C02F1/722C02F1/725C02F1/32C02F2103/003C02F2303/04C02F2305/023C02F2305/10B01J2523/00B01J35/33B01J35/39B01J2523/18B01J2523/47B01J2523/828B01J2523/842
Inventor 包禾欣韦君杭
Owner 浙江森井生物技术股份有限公司
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