OneoneWastewater treatment equipment for chemical hospitalsCharacteristics of hospital wastewater

①Wastewater has good biodegradability and fast biodegradation rate, making it suitable for biological treatment;

②Wastewater contains a large amount of bacteria, viruses, parasite eggs, etc., and must be disinfected before being discharged into municipal sewage pipelines;

③Wastewater contains a large amount of solid suspended substances such as feces, most of which have precipitable and decomposable properties. Therefore, it is necessary to strengthen the pre-treatment process of wastewater to remove these suspended substances.

Therefore, in the treatment process, both the hygiene indicators of disinfection and sterilization should be considered, while also taking into accountCOD、BODWaiting for environmental indicators.

IIIntegrated hospital sewage treatment equipmentProcess design based on regulatory basis:

Infectious Disease Prevention and Control Law of the People's Republic of China

Requirements for Wastewater Discharge in Medical InstitutionsGB18466-2005

Water Pollution Prevention and Control Law of the People's Republic of China

Implementation Rules of the Water Pollution Prevention and Control Law of the People's Republic of China

Regulations on Environmental Protection Management of Construction Projects, State Council Decree No253Technical specification basis:

Guidelines for Hospital Wastewater Treatment Technology "by the State Environmental Protection Administration

Guidelines for Hospital Wastewater Treatment Technology, National Environmental Protection Agency[2003]197name

Code for Design of Comprehensive Hospital BuildingsJGJ49-88

Design Specification for Hospital Wastewater TreatmentCECS07:2004

Emission Standards for Water Pollutants in Medical Institutions（GB18466-2005）

IIIIntegrated hospital sewage treatment equipmentProcess description

Wastewater is collected in septic tanks, anaerobically digested, and then treated with a grid to remove large and medium-sized suspended solids from the water. The effluent from the grid tank flows into the regulating tank, and a sewage pump is installed in the regulating tank to pump the sewage into the contact oxidation tank. The sewage is fully contacted with biofilm and activated sludge through aeration by a blower, and organic pollutants are degraded by aerobic bacteria; The effluent from the aeration tank enters the sedimentation tank, and the activated sludge produced by aeration is separated by gravity sedimentation; The upper clear liquid sewage pump enters the disinfection tank, and through a mixing process, the sewage and disinfectant are mixed in the tank to kill bacteria; Disinfected sewage is discharged into urban pipelines or natural water bodies after passing water quality monitoring.

According to the actual situation of the hospital, an integrated sewage treatment plan will be adopted. After installing the sewage pump from the regulating pool, it directly enters the integrated sewage treatment system, and the effluent meets the discharge requirements. The carbon steel is treated with anti-corrosion, and the integration is fully intelligent, achieving unmanned operation.

4Integrated hospital sewage treatment equipmentAutomatic control instructions

Integrated electronic control system: Automatically controls the water inlet, aeration, disinfection and other processes of the entire water treatment system, achieving automatic, reliable and energy-saving operation.

Install a sewage pump in the regulating tank to lift and enter the subsequent sewage treatment process. The start and stop of the submersible sewage pump can be controlled simultaneously by the liquid level device and time controller installed in the regulating tank. The start and stop of the submersible sewage pump are also controlled by the liquid level control instrument in the regulating tank. Auto start at high liquid level: Auto stop at low liquid level. The high and low liquid levels in the regulating pool can be set according to actual requirements.

Intermittent control of aeration: The aeration device can be linked to the start and stop of the submersible sewage pump, and aeration is carried out according to the water volume ratio. At the same time, the start and stop of the aeration device can be controlled according to the time controller set in the control cabinet, and the aeration time in the biochemical tank can be adjusted reasonably to ensure a reasonable gas water ratio and high treatment efficiency of the biochemical process. The intermittent aeration time can be set arbitrarily.

Disinfection control: Disinfection equipment can be linked to the start and stop of submersible sewage pumps, and disinfectant can be added according to the water volume ratio. Disinfection equipment can perform intermittent disinfection, and the time can be set arbitrarily. The start and stop of the disinfection equipment can be controlled according to the time set by the time controller in the control cabinet, and the disinfectant injection time can be adjusted reasonably to ensure the disinfection effect.