Wuwei City Sewage Treatment Equipment - Hospital Sewage

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Medical wastewater treatment device

process standards

After sewage treatment and disinfection in hospitals, factories, towns, and communities, the following standards should be met: 1. Three consecutive samples should be taken for testing, and no intestinal pathogenic bacteria or tuberculosis bacilli should be detected.

The total number of coliforms per liter shall not exceed 500.

When using chlorination method for disinfection, the contact time and residual chlorine content in the effluent of the contact tank should meet the requirements of Table 2-02.

The sludge in sewage treatment structures must undergo harmless treatment, and the discharge of sludge should meet the following standards:

The mortality rate of roundworm eggs is greater than 95%. Secondly, the fecal coliform value should not be less than 10-2. Thirdly, for every 10 grams of sludge (in the original sample), no intestinal pathogenic bacteria or tuberculosis bacilli should be detected.

When using high-temperature composting method for harmless treatment of sludge, the temperature of the compost must be greater than 50 degrees Celsius and should last for more than 5 days.

Hospitals without sewage equipment or centralized sewage treatment facilities must conduct separate disinfection or other harmless treatment of feces with infectious diseases. Article 2.0.6: After hospital sewage treatment and disinfection, the content of pollutants or harmful substances contained in it shall comply with the requirements of relevant current standards.

overview

The biological treatment process used in hospital wastewater treatment equipment, based on summarizing the operating experience of domestic and foreign domestic wastewater treatment equipment, combined with its own research results and engineering practice, has designed a complete set of sewage treatment equipment that can be buried underground. It integrates the removal of BOD5, COD, and NH3-N, and has the advantages of stable and reliable technical performance, good treatment effect, low investment, automated operation, easy maintenance and operation, no surface area occupation, no need for building, and no need for heating and insulation. Flowers and grass can be planted on the ground without affecting the surrounding environment.

principle

This device is generally buried underground and uses a secondary biological contact oxidation treatment process. Its treatment effect exceeds that of a fully mixed biological oxidation tank, and its adaptability to water quality is high, ensuring the stability of water treatment. The device uses a new type of highly effective elastic three-dimensional packing material in the pool, which has a strong removal function for organic substances in sewage. After oxidation treatment, the device produces less sludge and only needs to be discharged once every 90 days. In order to prevent the breeding and transmission of released pathogens, it is necessary to carry out deep disinfection treatment on water quality. At present, the commonly used disinfection processes include ultraviolet disinfection, chlorine dioxide disinfection, and ozone disinfection. Hospitals need to choose based on the characteristics of sewage quality and discharge volume.

wastewater treatment technology

• Mercury containing wastewater treatment

Mercury containing wastewater mainly comes from mercury used in various dental clinics and measuring instruments. The hazards of mercury can be converted into organic mercury after entering water bodies, and can be enriched and concentrated through the food chain. The treatment methods for mercury containing wastewater include iron chip reduction, chemical precipitation, activated carbon adsorption, and ion exchange.

• Acidic wastewater treatment

The acidic wastewater in hospitals mainly comes from testing items or chemical cleaning agents. Acidic wastewater corrodes drainage pipelines, reacts with metals to produce hydrogen gas, releases heat when in contact with water at high concentrations, and explodes when in contact with salts. Acidic wastewater causes changes in the overall pH value of the wastewater, as well as changes in other chemical substances. Substances such as sodium nitride can generate (NaN3) under acidic conditions, causing explosions and exhibiting strong toxicity. Neutralization treatment is often used for acidic wastewater. Sodium hydroxide and lime are used as neutralizing agents and added to acidic wastewater through stirring to achieve the desired effect.

• Infectious virus wastewater treatment

Hospital wastewater contains a large amount of pathogenic microorganisms, viruses, and chemical agents. Equipped with spatial agents. Characterized by spatial pollution, acute transmission, and latent transmission. Virus wastewater can be treated using disinfectants and ultraviolet light irradiation methods.

• Its waste liquid and wastewater treatment

The wastewater discharged from the hospital also contains a large amount of organic solvents, disinfectants, insecticides, and other chemical drugs used internally in the hospital. Toxic and harmful wastewater containing these special pollutants must be collected and treated properly, and cannot be discharged arbitrarily.

Equipment features

• The area where the equipment is buried underground can be used as green land, saving land area.
• The sewage integrated equipment is made of corrosion-resistant and antioxidant materials, with a long service life and saving operating costs.
• By combining biological contact oxidation tanks with layer by layer filtration and disinfection equipment, the sewage treatment effect is excellent, solving the problem of bacterial transmission.
• This device has good deodorization effect and produces a small amount of sludge, which will not cause other pollution hazards to the environment.
• Fully automatic control system, installation of damage alarm system, no need for manual supervision, saving labor input.

New standards

1. The new standards comprehensively control the sewage, exhaust gas, and sludge generated by hospitals, emphasizing the disinfection effect on pathogen containing sewage while also considering ecological environment safety.

2. In terms of biological indicators, the new standard sets different requirements for hospital wastewater discharged into sewers and water bodies. The new standard strictly distinguishes the nature of hospitals and divides them into two levels based on the destination of sewage, and proposes strict control indicators for each level on the basis of the original standard.

3. The new standard considers disinfection effectiveness and ecological safety issues, and specifies the disinfection time and residual chlorine amount for different types of hospitals and sewage destinations, strictly setting the upper limit of residual chlorine standards.

4. In terms of physical and chemical indicators, strict control has been implemented on the COD, BOD5, SS, animal and vegetable oils, petroleum products, anionic surfactants, and other indicators of hospital sewage and infectious disease hospital sewage discharged into surface water bodies, based on the original standards, to enhance the wind resistance of the sewage treatment system. Considering that ammonia nitrogen also consumes disinfectants, strict requirements have been put forward for ammonia nitrogen. At present, the disinfectants used in domestic hospitals are mainly liquid * and sodium hypochlorite. Although the price of liquid * is relatively low, its safety is poor, it is prone to leakage, and chlorine reacts with organic matter to generate organic halides, which can cause new pollution when entering water bodies and threaten human health. Although the sodium hypochlorite generator does not have the above hazards, its key components are damaged, the volume is large, the power consumption and salt consumption are high, and the operation and management are convenient. Chlorine dioxide has been confirmed by Lianheguo Health as a safe and efficient strong disinfectant, which has good disinfection effects on pathogenic microorganisms transmitted through water, including chlorine resistant viruses, spores, heterotrophic bacteria, sulfate reducing bacteria, and fungi in water systems. Chlorine dioxide has a fast sterilization speed, and can achieve a sterilization rate of over 99% in just a few minutes. Chlorine dioxide can also react with local organic matter in sewage, reduce the odor of sewage, and will not produce carcinogens such as trihalomethanes. The remaining amount of chlorine dioxide formed after disinfection can prevent the reproduction of fine bacteria. The composite method chlorine dioxide generator independently developed by the company is at the forefront of the industry. Currently, the company's leading products include chlorine dioxide generator dosing equipment, wall mounted, titration, fully automatic, high-purity, composite method, chemical method, high-efficiency method, and electrolytic method chlorine dioxide generators, which enjoy high reputation in the field. In addition, the company strives for excellence in sewage treatment in rural areas, communities, residential areas, hospitals, medical facilities, township health centers, and reclaimed water reuse.

Wastewater treatment agents

According to the different uses of drugs, they can be divided into the following categories:

• Coagulants: sometimes also known as coagulants, can be used as a means of strengthening solid-liquid forces, in processes such as primary sedimentation tanks, secondary sedimentation tanks, flotation tanks, and tertiary or deep treatment.
• Coagulant aid: The auxiliary flocculant plays a role and enhances the coagulation effect.
• Conditioning agent: also known as dehydrating agent, used for conditioning the remaining sludge before dewatering. Its varieties include some coagulants and coagulants mentioned above.
• Emulsifier: sometimes also known as a stabilizer, mainly used for pre-treatment of oily wastewater containing emulsified oil before water flotation. Its varieties include the above-mentioned coagulants and coagulants.
• Defoamer: mainly used to eliminate a large amount of foam in the process of aeration or mixing.
• PH adjuster: used to adjust the pH value of acidic and alkaline wastewater to neutral.
• Redox agent: used for the treatment of industrial wastewater containing oxidizing or reducing substances.
• Disinfectant: Used for disinfection treatment after wastewater treatment before discharge or reuse.

Wuwei City Sewage Treatment Equipment - Hospital Sewage