Customized sewage treatment equipment for Longhai Hospital

Customized sewage treatment equipment for Longhai Hospital

The integrated sewage treatment equipment adopts the "hydrolysis acidification+contact oxidation" process for sewage treatment, and the treated sewage is further disinfected with "chlorine dioxide disinfection" before being discharged.

The biological contact oxidation method is a traditional biochemical treatment method, in which the biological filler is a semi soft filler on a fixed bed. Using semi soft fillers as attachment carriers for microorganisms. The organisms are evenly distributed on the biological packing, which avoids the phenomenon of uneven distribution of microorganisms. At the same time, the organisms adhere to the surface of the packing and do not flow with water. Due to the strong agitation of the rising airflow, the biofilm is constantly renewed, thereby improving the purification effect. The contact oxidation method has the advantages of short treatment time, small volume, good purification effect, good and stable effluent quality, no need for sludge reflux or expansion, and low power consumption. Its main characteristics are:

High volumetric load and strong resistance to impact loads;

Ø It has the advantages of membrane method and less residual sludge;

Ø It has the advantages of activated sludge process, supplemented by mechanical equipment for oxygen supply, high biological activity, and short sludge age;

Can decompose substances that are difficult to decompose by other biological treatments;

Easy to manage, eliminating drawbacks such as sludge floating and swelling.

The biological treatment is planned to adopt the "hydrolysis acidification+secondary contact oxidation method"

Customized sewage treatment equipment for Longhai Hospital

The equipment includes a septic tank with a grid installed inside. The outlet of the septic tank is connected to the inlet of the regulating tank, and the outlet of the regulating tank is connected to the inlet of the hydrolysis acidification tank through a lift pump. The outlet of the hydrolysis acidification tank is connected to the inlet of the contact oxidation treatment tank, and the outlet of the contact oxidation treatment tank is connected to the inlet of the intermediate water tank. The outlet of the intermediate water tank is connected to the inlet of the sedimentation tank, and the upper outlet of the sedimentation tank is connected to the inlet of the filtration device. The outlet of the filtration device is connected to the inlet of the contact disinfection tank, and the contact disinfection tank is also connected to the disinfectant storage device. The lower outlet of the sedimentation tank is connected to the inlet of the sludge concentration tank through a sludge pump. This utility model has excellent process effect, stability and reliability. The main treatment process is contact oxidation method, and the operation process is continuous aeration and drainage, with good denitrification function.

Equipment process characteristics

The anaerobic denitrification process has a high degradation efficiency for pollutants. The removal rates of COD, BOD5, and SCN - in the anoxic stage are 67%, 38%, and 59%, respectively, while the removal rates of phenol and organic matter are 62% and 36%, respectively. Therefore, denitrification reaction is a relatively economical and energy-saving degradation process.
2. High volumetric load. Due to the use of enhanced biochemistry in the nitrification stage and high concentration sludge membrane technology in the denitrification stage, the sludge concentration for nitrification and denitrification has been effectively increased. Compared with similar foreign processes, it has a higher volumetric load.

3. High efficiency. This process has a high removal effect on organic matter, ammonia nitrogen, etc. in wastewater. When the total residence time is greater than 54 hours, the effluent after biological denitrification can be treated with coagulation and sedimentation to reduce the COD value to below 100mg/L, and other indicators can also meet the discharge standards, with a total nitrogen removal rate of over 70%.
4. Simple process, low investment, and low operating costs. This process uses organic matter in wastewater as the carbon source for denitrification, so there is no need to add expensive carbon sources such as methanol. Especially, with the installation of a device for removing fixed ammonia in the ammonia distillation tower, the carbon nitrogen ratio is increased, and the alkalinity generated during denitrification correspondingly reduces the alkali consumption required for nitrification.
5. The anaerobic/aerobic process has strong resistance to load shock. When the inflow water quality fluctuates greatly or the concentration of pollutants is high, this process can maintain normal operation, so the operation and management are also very simple. Through the comparison of the above processes, it is not difficult to see that the biological denitrification process itself not only removes nitrogen, but also degrades organic compounds such as phenol, cyanide, COD, etc. Based on the characteristics of water quantity and quality, we recommend using an anaerobic/aerobic (A/O) biological denitrification (internal circulation) process to ensure that the sewage treatment plant not only meets denitrification requirements, but also other indicators meet discharge standards.

With the rapid development of the social economy, the level of medical care in society is also increasing. However, hospitals still generate a large amount of medical biochemical wastewater during the treatment of patients, which contains many viruses and bacteria. Direct discharge can cause great harm to the environment.

The characteristics of hospital sewage are also reflected in the high BOD5/CODcr ratio of comprehensive sewage, strong biodegradability, and a large proportion of dissolved CODcr, which is more suitable for biological treatment.