How to protect the wastewater of the biological laboratory is not only a necessary work of environmental protection, but also a guarantee of the safety and health of the biological laboratory. Because wastewater contains untreated organic matter or chemicals, it is easy to pollute water sources and threaten human health. The installation and use of wastewater treatment equipment in biological laboratories can not only reduce the harm of wastewater to the environment, but also greatly help the safety of experimenters.
1. The working principle of wastewater treatment equipment in biological laboratory
There are two main types of wastewater treatment equipment for biological laboratories. One is physical treatment, including sedimentation tanks, filters, and chemical treatments, including neutralization, oxidation, precipitation and other treatments. The other type is biological treatment, mainly activated sludge method and biological contact oxidation method.
Physical and chemical methods are the traditional methods of industrial wastewater treatment. The physical method combines precipitation and filtration, etc., which can remove some suspended solids, precipitates and soluble impurities. The chemical law is to make the pollutants in the wastewater physicochemical into a solid state by adding chemicals, which is convenient for subsequent precipitation and other treatments. However, there are many limitations to physical and chemical treatment, and there are certain limitations to the treatment effect of wastewater. This method has significant limitations for the treatment of biological laboratory wastewater, especially for organic matter and chemicals.
Biological treatment is to decompose the pollutant compounds in wastewater into harmless substances and reduce the discharge of organic matter through the vitality of fungi and microorganisms. There are two types of biological treatment methods, one is biological contact oxidation and the other is activated sludge.
The biological contact oxidation method uses aerobic bacteria to attach and grow on the filler, so that the organic matter is hydrolyzed in the body of microorganisms and decomposed into carbon dioxide and water. The activated sludge method is to add activated sludge, and then surge in the sewage system to achieve the purpose of digesting and precipitating pollutants. The activated sludge method is a more common biological treatment method.
2. Installation plan of wastewater treatment equipment in biological laboratory
Scientific wastewater treatment solutions are the key to preventing the harm of wastewater to biological laboratories and the environment.
Before starting a wastewater treatment plant, it is important to define the information about the wastewater. Information includes contaminants, nutrients and pH levels in the water, as well as the flow, concentration, flow and treatment of wastewater. Then, start installing the device.
The installation of biological laboratory wastewater treatment equipment mainly includes the following five steps:
Installation of pipelines: Install pipes around the wastewater treatment equipment so that the inlet and outlet of the treatment equipment correspond to the pipes.
Installation of regulator: Regulator is an instrument responsible for controlling wastewater tanks, water supply systems, dosing systems, etc., and is commonly used for the operation and monitoring of treatment equipment.
Installation of wastewater ponds: Due to the trace chemicals in biological laboratory wastewater, it is essential to install wastewater ponds to adequately isolate wastewater and other nearby water sources.
Installation of the Conditioning System: The conditioning system is designed to maintain the stable operation of the processing equipment.
Installation of the reactor: The reactor is the main part of the biological treatment, and biological substances such as activated sludge, fungi and microorganisms are added to the reactor.
3. Maintenance and maintenance of wastewater treatment equipment in biological laboratories
In order to ensure the normal operation of biological laboratory wastewater treatment equipment, maintenance and maintenance are very important.
Regularly inspect and maintain the equipment, and find and solve equipment failures and water leakage problems in a timely manner. In particular, check the integrity and hygiene of critical parts such as pumps, control valves, strainers, etc.
Regular cleaning every day. Clean the water inlet, outlet, sewage pool and other parts, disassemble the reactor every once in a while, clean and disinfect.
Observe the suspended solids and flashes in the reactor carefully. For example, through cleaning, inspection and repair, checking water quality, adjusting the quality of treatment chemicals, etc., the effect can be improved in time and the operation efficiency of biological laboratory wastewater treatment equipment can be improved.
Regularly replace the active bacteria and microorganisms of the treatment equipment to ensure the effective treatment of the equipment. In addition, equipment can be replaced in a timely manner after it has "deteriorated" or "lived" to avoid degrading the treated water quality or worsening the damage.
To sum up, biological laboratory wastewater treatment equipment is an important equipment to ensure the health and environmental protection of the laboratory, especially suitable for biological treatment, and is the core part of laboratory wastewater treatment. Only by establishing systematic control and protection measures in use and management can the discharge of wastewater be reduced and the environment and people's health protected.