Ozone of hospital sewage treatment system
Hospital integrated into the general hospitals and infectious disease hospital two categories. Hospital sewage on the types and concentrations of pollutants and urban sewage stool similar, but not completely identical. Apart from the general pollutants, the hospital sewage also contains some specific pollutants, such as drugs, disinfectants, diagnostic agents, such as detergents.
Hospital sewage mainly from various wards, especially infectious diseases rooms, operating theatres, Laundry by sewage water, in addition contains a lot of pathogenic micro-organisms, such as parasite eggs and viruses such as hepatitis, tuberculosis and dysentery bacteria Jun Deng, but also contains a lot of pollutants, including organic matter pollution of the total about 60 percent dissolved substances is not about 40 per cent of the total. Because no large muscle tissue, and other substances such as precipitation, it would account for a large proportion of the worms and their eggs, a large number of bacteria together in the sludge sedimentation.
In recent years, the widespread use of medical radioisotopes such as those commonly used medical appliances, water washing, therefore, flushing sewage contain radioisotopes.
In addition, the hospital is also a pharmaceutical subsidiary and its drainage containing harmful substances such as pH, so, the hospital has to go through sewage disinfection, decontamination, and so be discharged into rivers.
Hospital sewage mainly from various wards, especially infectious diseases rooms, operating theatres, Laundry by sewage water, in addition contains a lot of pathogenic micro-organisms, such as parasite eggs and viruses such as hepatitis, tuberculosis and dysentery bacteria Jun Deng, but also contains a lot of pollutants, including organic matter pollution of the total about 60 percent dissolved substances is not about 40 per cent of the total. Because no large muscle tissue, and other substances such as precipitation, it would account for a large proportion of the worms and their eggs, a large number of bacteria together in the sludge sedimentation.
In recent years, the widespread use of medical radioisotopes such as those commonly used medical appliances, water washing, therefore, flushing sewage contain radioisotopes.
In addition, the hospital is also a pharmaceutical subsidiary and its drainage containing harmful substances such as pH, so, the hospital has to go through sewage disinfection, decontamination, and so be discharged into rivers.
Process options
Processing method and process is handled in accordance with the established targets, suspended its handling of objects floating of, organic matter, radioisotopes, bacteria, viruses, pH, etc.. Which is against the larger pathogens, it is described as follows.
(1) Suspended solids and floating
Exports in the general wards to install septic tanks. Put sewage into the septic tanks, which account for a large proportion of pollutants in the pool precipitation separation, fermentation digestion. Also in the process of settlement in the subsequent inclusion of some virus infection settlement, the sludge should be dealt with accordingly. Septic tank effluent will carry part of the floating impurities enter and mechanical disinfection pool, and this will affect the disinfectant bactericidal effect, therefore, disinfected sewage into the pool before the precipitation should be fully and simple filtering.
(2) Organic Pollutants
Hospital sewage organism generally less than urban sewage, BOD5 in more than 100 mg/l around. Can make use of its own water purification will be its ability to digest. But if asked directly into higher surface water, scenic areas, etc., to their organic processing, the general use of biological treatment would be favor.
(3) Radioisotope
As a ray nuclei spontaneous transformation, it is the existence of the radioactive contamination of sewage, not artificial radioactive substances in the effluent change of the strength and performance. Therefore, only with diluted or concentrated approach to reduce or avoid the harm. Under such sewage may be the type of radioactive material, by the length of its half-life approach. The short half-life of an element using the method of storage or dilution methods; for the long half-life of radioactive substances can be physical, chemical or biological treatment, will be its first separated from the sewage. According to the survey, the uses of the general hospital of radioisotopes are shorter half-life, and the volume of effluent less, it usually adopts a storage method.
(4) Parasites
Parasite eggs from the feces, fecal sewage than its share (about 1.02-1.04), they can be used by precipitation will be isolated from the sewage. General with the death of standards as parasites, that is, when Ascaris lumbricoides death, we think that other eggs were fatal. Ascaris lumbricoides in the outside world can live 1-5 years, but fermentation environment, the life cycle is significantly shortened. In the accumulation of droppings in the summer can live seven days in the winter can live 21 days. Often use septic tanks, sludge cycle in more than three months, the parasite eggs in the pool can precipitation in the environment to kill fermentation.
(5) Virus Bacterial virus is a much smaller objects, they do not have complete structure of the cell, they must be living cells can survive in breeding. Eighty percent infectious diseases in human are caused by a virus. Cold virus generally not heat-resistant (but hepatitis virus on the hot, dry and frozen have some resistance, such as hepatitis A heat-resistant 56 ℃, one hour more than 60 ℃ B heat, more than four hours), but All virus on the boiling temperature and strong oxidants are sensitive and therefore could vote to a certain concentration of chlorine inactivated.
(6) Communicable diseases
Many of the types of infectious disease, but their activities are more or less the same rules, usually in the range of 5-9.6 PH value of survival, when PH value beyond the scope of this disease is death. Clean water for more than a month to live, but live in manure effluent shorter. This is because: a. the presence of faucal sewage generated its own decomposition of ammonia, can play a role sterilization; b. stool decomposition can have some of the bacteria sterilization inactivated. Most other bacteria (except for the anaerobic bacteria, tetanus) are the aerobic. Use of this characteristic, such as stamping seal pool, on the one hand because of decomposition of organic matter consume a large amount of oxygen, on the other hand sealed soothing difficult because of a pond, resulting in reduction of dissolved oxygen in sewage, which aerobic bacteria in anoxic self-eradication.
In addition, laboratories, testing rooms are chromium, mercury and other heavy metals exist, can be used to remove the chemical.
To sum up, hospital sewage is an extremely complex system, using conventional treatment methods difficult to achieve satisfactory results.
The recent development of the ozone water treatment technology, in the hospital sewage treatment works are widely used, received an excellent result, it is because ozone than chlorine, bleaching powder, chlorine dioxide is more oxidative capacity, faster than chlorine 600-3000 times faster killed, including chlorine cannot thoroughly kill all the bacteria, viruses, etc.; could be some heavy metal ions, Hg, such as separation of precipitation to the purpose of other ozone can reduce the biochemical oxygen demand (BOD ), and chemical oxygen demand (COD), remove nitrite and discoloration, such as deodorant. After this treatment the hospital sewage, which can greatly enhance emission standards, even as non-potable water can be returned to use.
(1) Suspended solids and floating
Exports in the general wards to install septic tanks. Put sewage into the septic tanks, which account for a large proportion of pollutants in the pool precipitation separation, fermentation digestion. Also in the process of settlement in the subsequent inclusion of some virus infection settlement, the sludge should be dealt with accordingly. Septic tank effluent will carry part of the floating impurities enter and mechanical disinfection pool, and this will affect the disinfectant bactericidal effect, therefore, disinfected sewage into the pool before the precipitation should be fully and simple filtering.
(2) Organic Pollutants
Hospital sewage organism generally less than urban sewage, BOD5 in more than 100 mg/l around. Can make use of its own water purification will be its ability to digest. But if asked directly into higher surface water, scenic areas, etc., to their organic processing, the general use of biological treatment would be favor.
(3) Radioisotope
As a ray nuclei spontaneous transformation, it is the existence of the radioactive contamination of sewage, not artificial radioactive substances in the effluent change of the strength and performance. Therefore, only with diluted or concentrated approach to reduce or avoid the harm. Under such sewage may be the type of radioactive material, by the length of its half-life approach. The short half-life of an element using the method of storage or dilution methods; for the long half-life of radioactive substances can be physical, chemical or biological treatment, will be its first separated from the sewage. According to the survey, the uses of the general hospital of radioisotopes are shorter half-life, and the volume of effluent less, it usually adopts a storage method.
(4) Parasites
Parasite eggs from the feces, fecal sewage than its share (about 1.02-1.04), they can be used by precipitation will be isolated from the sewage. General with the death of standards as parasites, that is, when Ascaris lumbricoides death, we think that other eggs were fatal. Ascaris lumbricoides in the outside world can live 1-5 years, but fermentation environment, the life cycle is significantly shortened. In the accumulation of droppings in the summer can live seven days in the winter can live 21 days. Often use septic tanks, sludge cycle in more than three months, the parasite eggs in the pool can precipitation in the environment to kill fermentation.
(5) Virus Bacterial virus is a much smaller objects, they do not have complete structure of the cell, they must be living cells can survive in breeding. Eighty percent infectious diseases in human are caused by a virus. Cold virus generally not heat-resistant (but hepatitis virus on the hot, dry and frozen have some resistance, such as hepatitis A heat-resistant 56 ℃, one hour more than 60 ℃ B heat, more than four hours), but All virus on the boiling temperature and strong oxidants are sensitive and therefore could vote to a certain concentration of chlorine inactivated.
(6) Communicable diseases
Many of the types of infectious disease, but their activities are more or less the same rules, usually in the range of 5-9.6 PH value of survival, when PH value beyond the scope of this disease is death. Clean water for more than a month to live, but live in manure effluent shorter. This is because: a. the presence of faucal sewage generated its own decomposition of ammonia, can play a role sterilization; b. stool decomposition can have some of the bacteria sterilization inactivated. Most other bacteria (except for the anaerobic bacteria, tetanus) are the aerobic. Use of this characteristic, such as stamping seal pool, on the one hand because of decomposition of organic matter consume a large amount of oxygen, on the other hand sealed soothing difficult because of a pond, resulting in reduction of dissolved oxygen in sewage, which aerobic bacteria in anoxic self-eradication.
In addition, laboratories, testing rooms are chromium, mercury and other heavy metals exist, can be used to remove the chemical.
To sum up, hospital sewage is an extremely complex system, using conventional treatment methods difficult to achieve satisfactory results.
The recent development of the ozone water treatment technology, in the hospital sewage treatment works are widely used, received an excellent result, it is because ozone than chlorine, bleaching powder, chlorine dioxide is more oxidative capacity, faster than chlorine 600-3000 times faster killed, including chlorine cannot thoroughly kill all the bacteria, viruses, etc.; could be some heavy metal ions, Hg, such as separation of precipitation to the purpose of other ozone can reduce the biochemical oxygen demand (BOD ), and chemical oxygen demand (COD), remove nitrite and discoloration, such as deodorant. After this treatment the hospital sewage, which can greatly enhance emission standards, even as non-potable water can be returned to use.
Process Profile
The entire process can be divided into two treatments, as shown.
A. Primary processing
The main aspect of this sterilization sewage can be discharged into the city, and then enter the city sewage treatment plant, for in-depth processing.
The secondary treatment of sewage, not only sewage sterilization and BOD, COD has significantly reduced emissions of effluent standards at the national level, can be directly discharged into the water body.
A. Primary processing
The main aspect of this sterilization sewage can be discharged into the city, and then enter the city sewage treatment plant, for in-depth processing.
The secondary treatment of sewage, not only sewage sterilization and BOD, COD has significantly reduced emissions of effluent standards at the national level, can be directly discharged into the water body.
IV．Disinfection comparison with the hospital sewage ozone sterilization and the other means
Ozone Disinfection overcome the other way in the transport, storage and processing risks.
2. Ozone disinfection contact time is short, to improve the water quality, is a good disinfectant.
3. Ozone can kill other means such as chlorine can kill the virus, such as Bacillus.
4. Ozone Disinfection of ammonia from wastewater in the hydrogen content and the impact of PH value.
5. Ozone can be cheap air or oxygen gas source for the preparation derived.
6. As the past year electronic technology, and technology in the development of ozone, the ozone generator makes now greatly reduced power consumption, size is getting smaller and smaller, and greatly enhanced stability operations, coupled with the current low tariffs, thus ozone in the power of adequate sewage treatment The application, more and have obvious advantages.
7. Today, ozone generator and the price of sodium hypochlorite, chlorine, chlorine dioxide generator charges.
Above, ozone applied to the hospital wastewater disinfection has become inevitable and the best options.
