Parameters of Ankang Hospital Sewage Treatment Equipment Manufacturer

Design the effluent quality;

The effluent quality of treated sewage should meet the first level standard specified in the "Discharge Standards for Water Pollutants in Medical Institutions" (GB18466-2005). The specific indicators are shown in Table 4-2.

Process selection;

The hospital sewage in this project mainly includes toilet flushing sewage and hand washing sewage, which are ordinary hospital sewage with good biodegradability. Wastewater can only be discharged directly after pre-treatment in septic tanks, which cannot meet the discharge requirements. Therefore, a new sewage treatment system needs to be built. This sewage has the characteristics of large discharge variation coefficient and high fluctuation of discharge water quality, so this plan is designed according to the characteristics of this project.

Based on the characteristics of the hospital's sewage and the water quality requirements for sewage discharge standards, and our company's practical experience in sewage treatment projects over the years, especially in the design and operation of similar sewage treatments, this project adopts a hospital sewage treatment system with (anaerobic/anoxic/aerobic biochemical treatment method)+multi-media filter process as the main process

Parameters of Ankang Hospital Sewage Treatment Equipment Manufacturer

Characteristics of hospital wastewater;

In sewage treatment, the quality of hospital wastewater is complex. Wastewater contains a large amount of bacteria, viruses, parasite eggs, and toxic and harmful substances, some of which may contain radioactivity. The hospital sewage mainly comes from the comprehensive ward sewage. The design adopts a biological contact oxidation+precipitation+disinfection process, namely A2O process treatment. The function of A2O process is nitrification and denitrification. The principle is to convert ammonia nitrogen in sewage into nitrite nitrogen and nitrate nitrogen through the action of nitrification and denitrification bacteria, and then convert nitrate nitrogen into nitrogen through the action of denitrification bacteria to remove nitrogen from sewage. The design focus is on the sterilization and disinfection methods for sewage and sludge. The key is to kill pathogenic bacteria.

overview

The use of membrane biotechnology in hospital sewage treatment equipment is a new process that combines biological treatment technology with membrane separation technology, replacing the traditional secondary sedimentation tank. It can efficiently perform solid-liquid separation and obtain stable reclaimed water for direct use. It can also maintain a high concentration of microorganisms in the biological pool, with minimal residual sludge in the process, effectively removing ammonia nitrogen. The suspended solids and turbidity in the effluent are close to zero, and bacteria and viruses in the effluent are greatly removed, resulting in low energy consumption and small footprint. In the 1970s, research on membrane bioreactors for sewage and wastewater treatment began in many countries in the United States, Japan, South Africa, and Europe. Its water source comes from hospital and medical wastewater (such as operating room drainage, hospital canteen drainage, hospital ward drainage, hospital laboratory drainage, hospital toilet drainage, etc.).

Equipment process flow

Raw water → Grid → Regulating tank → Lift pump → Bioreactor → Circulating pump → Membrane module → Disinfection device → Reclaimed water storage tank → Reclaimed water use system

Process description

The sewage enters the regulating tank through the grid and then enters the bioreactor through the lifting pump. The aeration machine is activated by the PLC controller for oxygenation. The effluent from the bioreactor enters the membrane separation treatment unit through the circulation pump, and the concentrated water returns to the regulating tank. The membrane separated water is then treated with rapid mixing method for chlorination and disinfection of chlorine tablets before entering the reclaimed water storage tank. The backwash pump uses the treated water in the cleaning tank to backwash the membrane treatment equipment,^[1]Return the backwash sewage to the regulating tank. Control the opening and closing of the lift pump by regulating the water level inside the bioreactor. The filtration and backwashing operations of the membrane unit can be controlled automatically or manually. When membrane units require