The laboratory sewage treatment equipment is characterized by complete specifications, easy operation, low operating costs, low failure rate, and long service life.
Usually, laboratory wastewater contains inorganic pollutants such as sulfuric acid, nitric acid, hydrochloric acid, caustic soda, chromium, zinc, manganese, copper, iron, and other acids, bases, salts, and heavy metal ions; Organic pollutants mainly include hydrocarbons such as alkanes, alkenes, ketones, ethers, phenols, aldehydes, etc; Biological pollutants mainly contain pathogenic microorganisms such as bacteria and viruses.
Cases of laboratory sewage treatment equipment are spread throughout the country, and the equipment is mainly used in the following fields:
1. Secondary and higher education institutions: wastewater generated by laboratories such as the School of Life Sciences, School of Chemical Engineering, School of Materials Science, School of Environment, School of Food Science, School of Medicine, and School of Agriculture;
2. Research institutes: laboratory wastewater generated during the research process by research institutes, testing centers, inspection centers, etc;
3. Center for Disease Control and Prevention: Wastewater generated from laboratories such as physical and chemical testing, microbiology, PCR, P2, P3, P4, etc; Animal husbandry and veterinary medicine: wastewater generated by animal epidemic prevention, pathogenic microorganisms and other laboratories;
4. Drug inspection: wastewater generated by laboratories such as chemical rooms and drug rooms; Central blood station: wastewater generated by testing laboratories, central laboratories, quality control laboratories, and other laboratories;
5. Product quality inspection: wastewater generated by laboratories such as food analysis rooms; Environmental monitoring: wastewater generated by laboratories such as water analysis rooms and trace analysis rooms;
6. Agricultural Technology Center: Wastewater generated by laboratories such as chemical rooms and drug residue rooms; Hospital physical examination center: wastewater generated from laboratories such as physical and chemical laboratories and laboratory testing rooms;
7. Inspection and Quarantine Bureau: Wastewater generated by health centers, technical centers, and other laboratories; Biopharmaceuticals: wastewater generated from physical and chemical analysis, quality inspection rooms, laboratories, etc;
8. Oilfield petrochemicals: wastewater generated by central laboratories such as oil extraction plants, refineries, and environmental monitoring stations; Enterprise: Wastewater generated by central laboratories, quality inspection rooms, laboratories, and other laboratories.
technological process
The laboratory cleaning wastewater is collected by the collection system and first enters the regulating tank to regulate the water volume and homogenize the water quality. When the water volume in the regulating tank reaches a certain liquid level, it is quantitatively lifted to the laboratory integrated sewage treatment equipment by the lifting pump. In the integrated sewage treatment equipment, the first step is to enter the acid-base neutralization regulation system for acid-base neutralization. Here, a pH controller is used to accurately add a certain amount of NaOH aqueous solution using a metering pump to adjust the pH value to between 8-9. Under alkaline conditions, the acid in the wastewater is neutralized. If the wastewater contains heavy metal ions such as iron, cadmium, copper, manganese, nickel, lead, chromium, etc., they can react chemically with OH - to form hydroxide precipitation.
The effluent from the acid-base neutralization tank then flows into the sedimentation tank. The sediment generated after acid-base neutralization and other suspended solids in the sewage are separated from the sludge and water through the opposite flow between the sludge and water in the sedimentation tank.
The effluent from the sedimentation tank enters the heavy metal trap, photocatalytic reactor, and microelectrolyte reactor in sequence, and then enters the ozone oxidation tank. After oxidation, the wastewater * * enters the multi-media filter. The small suspended solids, trace metals, and very small amounts of organic matter that have not been removed are partially removed by physical and chemical processes such as adsorption and interception of quartz sand and activated carbon with a huge pore structure and specific surface area. The other part is degraded and removed by anaerobic, aerobic, and facultative bacteria attached to the microbial membrane on the activated carbon. The process of activated carbon interception and adsorption is interspersed, alternating, and circulating with the degradation and desorption of microorganisms. At this point, the wastewater can be discharged in compliance with the standard.
The entire wastewater treatment process is controlled by an automatic control system, and the neutralization regulation system is equipped with a float level control instrument. The pump stops automatically at low liquid levels and starts automatically at high liquid levels, which can basically achieve unmanned operation.
Process characteristics of laboratory sewage treatment equipment
1. Using technologies such as neutralization precipitation, chemical oxidation, heavy metal capture, photocatalytic reaction, microelectrolysis, chlorine dioxide disinfection, and multi-media filtration to treat various pollutants in wastewater;
2. Real time monitoring and control of wastewater quality changes and treatment processes using microcomputer programs, achieving 24/7 automatic operation without the need for dedicated personnel on duty;
3. Accurately control the dosage using a pH meter and imported metering pump, and equipped with devices such as liquid level control and shortage alarm;
4. Using advanced oxygenators, the gas water contact is sufficient and the reaction is complete;
5. Easy to operate, stable in operation, long in service life, and low in operation and maintenance costs;
6. Small footprint, can be placed indoors or outdoors according to different situations;
7. Tailored design and manufacturing can be carried out according to different requirements of users.