Medical sewage treatment and reuse technology, how to treat medical sewage?

With membrane technology, hospital wastewater contains viruses and heavy metals. Personally, I think it's hard to deal with.

Hello, medical sewage contains a large number of pathogenic bacteria, viruses and chemicals, so you need to treat the pollution sources in the water first when treating, there is a special sewage treatment equipment for medical wastewater can be tried.

Green Day will answer for you: the best way is to use the diversion aeration biological filter, the diversion aeration biological filter makes the sewage in the same treatment tank, completes the process of aeration sedimentation, secondary aeration and secondary sedimentation, and solves the process of other sewage treatment that requires four pools to complete.

This should belong to the big engineering category.

Specifically, you can consult Hubei Shengshi Environmental Protection.

They do water treatment chemicals and water treatment engineering.

Process selection is carried out according to the size, nature and destination of the hospital. According to the classification of hospitals, they are divided into infectious disease hospitals and general hospitals. After hospital sewage treatment, the discharge is divided into two categories: discharge into natural water bodies and discharge into urban sewage treatment plants through municipal sewers.

The process used in medical wastewater treatment must ensure that the treated effluent meets the standard, and the three main processes used are: primary treatment to enhance the treatment effect, secondary treatment and simple biochemical treatment. The process selection principle is as follows:

1. Infectious disease hospitals must adopt secondary treatment and pre-disinfection treatment.

2. Hospitals at or above the county level that treat effluent discharged into natural water bodies must adopt secondary treatment.

3. The general hospital that treats the effluent discharged into the urban sewer (with a secondary sewage treatment plant downstream) recommends the use of secondary treatment, and the treatment effect must be strengthened for those who adopt the primary treatment process.

4. For small general hospitals in economically underdeveloped areas, simple biochemical treatment can be used as a transitional treatment measure when the conditions are not available, and then the secondary treatment or the primary treatment with enhanced treatment effect can be gradually realized.

1.Sewage treatment structures should be located downwind of the prevailing wind direction in the local summer.

2.Appropriate leeway should be reserved in accordance with the overall plan.

3.The sewage station drainage network is located near the main outlet, at the low point of the pipe network elevation.

4.There are convenient transportation, transportation and water and electricity conditions.

5.Infectious disease hospitals, sewage treatment projects, production management buildings, and living facilities should be arranged in an overall manner and strictly isolated.

6.Hospital sewage treatment projects and wards, residential areas and other buildings are provided with green protective belts or isolation belts.

The treatment process of hospital sewage is selected according to the scale, nature and discharge of treated sewage in the hospital.

There are three main processes used in the treatment and treatment of hospital sewage: primary treatment, secondary treatment and simple biochemical treatment to enhance the treatment effect.

The hospital sewage treatment process generally adopts the operation and management methods of engineering design, construction and acceptance, and the treatment facilities need to go through a certain period of trial operation before the treatment effect can achieve the expected purpose. The chemical treatment needs to go through one month of trial operation, and the secondary biochemical treatment needs to go through more than three months of trial operation.

1.Physicochemical + biochemical treatment process is usually adopted, and the main processes for the treatment of hospital sewage are: flocculation and sedimentation (physicochemical) + hydrolysis acidification (biochemical) + deep oxidation (biochemical) + disinfection --- discharge up to standard.

Flocculation and precipitation (physicochemical) + hydrolysis acidification (biochemical) + MBR (biochemical) + disinfection --- discharge up to standard.

2.The treatment process of hospital sewage is physicochemical: mainly the harmful precipitation that cannot be decomposed by microorganisms, and the chemical agents such as flocculants and coagulants are added to the sewage to transfer the harmful substances to the sludge and achieve the purpose by treating the sludge.

Biochemistry of hospital sewage treatment process: It is human beings who have discovered the ability of microorganisms in water bodies in nature to decompose organic matter, and the analysis concludes that microorganisms in different environments can decompose different harmful substances, and generally uses anaerobic bacteria + aerobic bacteria culture, that is, hydrolysis acidification and deep oxidation.

3.Disinfection method of hospital sewage treatment process.

There are many ways to disinfect hospital sewage, such as liquid chlorine, ozone, sodium hypochlorite, chlorine dioxide, etc. However, the commonly used disinfection method is: chlorination method, which has the advantages of convenient dispensing, low cost and high reliability, and the ozone method is used for hospital sewage disinfection, which can effectively kill coliform bacteria, polio and other viruses.

Moreover, it is not affected by the ammonia nitrogen content and pH value in the wastewater.

Sewage treatment (wastewater treatment): The process of purifying sewage in order to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and is increasingly entering the daily life of ordinary people.

The topic of water pollution is constantly raised, especially the problem of groundwater pollution, and some farmers or entrepreneurs in Hangzhou, Wenzhou and other places in Zhejiang Province have funded the environmental protection bureau to swim in the river, so as to arouse everyone's attention to the severity of water pollution.

The pollution of surface water is obvious, but the pollution of groundwater is shocking. 70% of China's 1.3 billion people drink groundwater, and more than 400 of the more than 660 cities rely on groundwater as their drinking water source. However, according to reports, 90% of the country's urban groundwater has been polluted.

Another set of data also shows that groundwater is facing serious challenges. In 2011, 9 provinces and cities including Beijing and Shanghai evaluated 857 monitoring wells in their jurisdictions, and 2% of the monitoring wells with water quality of class I and class II were accounted for, while there were as many hidden wells as many as class IV and V monitoring groups.

Among the nine provinces and cities, Hainan Province has the best water quality, with Class II water as the main body, followed by Shanghai and Beijing, with most of them Class III, while Heilongjiang and Jiangsu have the highest proportion of Class IV water, while Jilin, Liaoning, Guangdong, and Ningxia have generally only reached the level of Class V.

In the past two years, the gross profit margin of all regions has remained at about 70%, and even exceeded 100% in some areas, and the development potential of the industry is very large.

Hospital wastewater contains some special pollutants, such as drugs, disinfectants, diagnostic agents, detergents, as well as a large number of pathogenic microorganisms, parasite eggs and various viruses.

At present, the treatment process of medical wastewater in medical sewage treatment equipment is mainly composed of first-level precipitation disinfection treatment and second-level biochemical disinfection treatment process. The specific treatment process of medical sewage treatment equipment can be selected according to the effluent requirements. When the treated wastewater can be discharged into the urban sewage pipe network, the primary treatment is adopted, and when direct discharge is required, the secondary treatment process is adopted.

When the primary treatment process is adopted, the hospital sewage should be separated from the sewage and rainwater in the living area of the employees, and only the hospital sewage should be disinfected; When the secondary or advanced treatment process is adopted, the sewage from the living area of the staff can be treated with the hospital sewage river according to the need, but the kitchen water must be provided with grease trap (pool). According to the characteristics of hospital sewage, medical sewage treatment equipment generally adopts the advanced and mature process of "anaerobic hydrolysis + biological contact oxidation + disinfection".

The combination of anaerobic hydrolysis and biological contact oxidation processes can minimize the degradation of organic matter in the wastewater, and the chlorine dioxide disinfection system greatly reduces the toxicity of the wastewater to below safe values. Infectious disease medical institutions and tuberculosis medical institutions should adopt secondary treatment + disinfection process (or advanced treatment + disinfection process) for sewage treatment; When the sewage discharge standard of comprehensive medical institutions is implemented, the medical sewage treatment equipment should adopt the secondary treatment + disinfection process (or advanced treatment + disinfection process), and the primary treatment or primary enhanced treatment + disinfection worker B should be used when the pretreatment standard is implemented.