Medical wastewater treatment system

Medical wastewater treatment system

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Main products of sewage equipment: integrated sewage treatment equipment, buried sewage treatment equipment, domestic sewage treatment equipment, hospital sewage treatment equipment, dental clinic sewage treatment equipment, dental clinic sewage treatment equipment, rural sewage treatment equipment, micro power sewage treatment equipment, fiberglass sewage treatment equipment, small medical sewage treatment equipment, sewage treatment integrated machine, etc.

Medical wastewater treatment systemThe sewage enters the oil separation and slag removal tank through the regulating tank and grid, and then enters the air flotation equipment through the sewage pump to remove most of the oil, BOD, and suspended solids. After that, the sewage enters the bioreactor, and the aeration machine is started for oxygenation through the PLC controller. The effluent from the bioreactor enters the membrane separation treatment unit through the circulation pump, and the concentrated water returns to the bioreactor. The water separated by the membrane is directly discharged or reused. Part of the effluent from the air flotation equipment is pumped into the dissolved air tank through a pressure pump, and then returns to the air flotation equipment after being dissolved. The backwash pump uses the clean water in the clean water storage tank to backwash the membrane treatment equipment, and the backwash wastewater returns to the bioreactor. The filtration and backwashing operations of the membrane unit can be controlled automatically or manually. When the membrane unit requires chemical cleaning operation, close the inlet valve and sewage circulation valve, open the chemical cleaning valve and chemical circulation valve, start the chemical circulation pump and cleaning pump, and perform chemical cleaning operation.

The MBR bioreactor is controlled by a programmable logic controller (PLC). It has the following functions:
The entire process of membrane bioreactor adopts an automatic control system, greatly reducing the operating and management costs.
The inlet pump runs automatically. When the water level in the bioreactor reaches a high level, the inlet pump stops running, and when the water level drops to a low level, the inlet pump automatically starts.
Automatically turn on and off the circulating pump based on the water level in the reclaimed water storage tank.
Automatically turn on and off the dosing pump, and adjust the dosing amount as needed.
Automatically run membrane cleaning and disinfection programs.
The motor is equipped with overcurrent and overload protection.
Process Characteristics
At present, sewage treatment equipment generally has problems such as poor treatment efficiency, high operating costs, large facility footprint, and unsatisfactory operation of treatment facilities. Therefore, China's urban water treatment industry urgently needs to develop economically efficient and applicable treatment processes and supporting equipment.
In this scheme, the sewage treatment equipment adopts the air flotation+membrane bioreactor (MBR) process. The core part of this process, MBR, is a new process that combines biological treatment technology with membrane separation technology, replacing the traditional two-stage sedimentation process. It can efficiently separate solid and liquid to obtain stable reclaimed water for direct use, and maintain a high concentration of microorganisms in the biological tank. The process has less residual sludge and effectively removes ammonia nitrogen. The suspended solids and turbidity in the effluent are close to zero. Bacteria and viruses in the effluent are greatly removed, with low energy consumption, small footprint, convenient operation and management, and the effluent can be directly reused. It is particularly affected by industrial development, population area, and water resources. Areas lacking welcome.

The application of membrane biological treatment technology in wastewater regeneration and utilization has the following characteristics:
(1) It can efficiently perform solid-liquid separation, separating suspended substances, colloidal substances, and microbial communities lost from biological units in wastewater from purified water. The separation process is simple, occupies a small area, has good effluent quality, and generally does not require tertiary treatment for reuse.
(2) It can maintain a high concentration of biomass in the biological treatment unit, greatly increasing the volumetric load. At the same time, the high efficiency of membrane separation greatly shortens the hydraulic retention time of the treatment unit, and correspondingly reduces the footprint of the bioreactor.
(3) Due to its ability to prevent the loss of various microbial communities, it is beneficial for the growth of slow growing bacteria (such as nitrifying bacteria), thereby facilitating the smooth progress of various metabolic processes in the system.
(4) Extending the residence time of some macromolecules that are difficult to degrade organic compounds is beneficial for their decomposition.
(5) Membrane treatment technology, like other filtration and separation technologies, is prone to clogging as a filtration medium during long-term operation. The flow rate of water through the membrane gradually decreases over time. Effective backwashing and chemical cleaning can slow down the decrease in membrane flux and maintain the effective service life of MBR systems.
(6) MBR technology is applied in urban sewage treatment, and due to its simple process and convenient operation, it can achieve fully automatic operation and management.

MSBR (Modified Sequencing Batch Reactor) is an improved sequencing batch reactor, which is a more ideal sewage treatment system developed based on the characteristics of SBR technology and combined with traditional activated sludge process technology. MSBR does not require a primary sedimentation tank or a secondary sedimentation tank, and can operate continuously with water inlet at a constant liquid level when the reactor is fully filled. Adopting a single tank multi grid approach, combining the advantages of traditional activated sludge process and SBR technology. Not only does it not require intermittent flow, but it also eliminates the need for more connecting pipes, pumps, and valves required for multi tank processes. Through pilot studies and productive applications, it has been proven that the MSBR method is an economically effective, reliable, and easy to implement computer-controlled wastewater treatment process.

1. The basic principles and characteristics of MSBR method
The basic components of a 1.1MSBR reactor consist of three main parts: an aeration grid and two alternating batch processing grids. The main aeration grid maintains continuous aeration throughout the entire operating cycle, while during each half cycle, two sequential batch treatment grids alternate to serve as SBR and clarification tanks, respectively.
The operation steps of 1.2MSBR are as follows: in each half cycle, the main aeration grid is continuously aerated, one of the batch processing grids is used as a clarification tank (equivalent to the secondary sedimentation tank of ordinary activated sludge process), and the other batch processing grid is subjected to the following series of operations