Beauty Salon Wastewater Treatment System

E&C Vietnam Environmental Technology Services Joint Stock Company has many years of experience in designing, constructing, operating, and renovating the Beauty Salon wastewater treatment system  using biological methods. 

Learn about beauty salon wastewater

Sources of beauty salon wastewater include: 

• Wastewater from operating rooms : contains large amounts of suspended solids, organic substances characterized by BOD5 criteria, nutrients especially nitrogen and phosphorus. We are especially interested in the nitrogen component because nitrogen contains a lot in liposuction samples...
• In wastewater, BOD5 content usually ranges from 250 to 800 mg/1, depending on the type, size and characteristics of the clinic.
• In wastewater from beauty salons, ammonium nitrogen content usually ranges from 30 to 50 mg/l.
• Microbial criteria for wastewater from beauty salons and medical facilities contain pathogenic bacteria, especially wastewater from septic tanks.
• Wastewater from toilets : generated from urinals and toilets. The nature of this waste stream is that the wastewater has been preliminarily treated through a three-compartment septic tank system. In a three-compartment septic tank, wastewater with high pollutant content is preliminarily treated by anaerobic microorganisms. However, wastewater after passing through the septic tank still contains very high levels of pollutants (COD, BOD, Nitrogen, Phosphorus). Low wastewater flow from toilet.
• Hand sanitizer : generated from handwashing sinks and floor drains in toilets. The nature of this waste stream contains low levels of pollutants and high wastewater flow. Therefore, when this wastewater stream is collected into a centralized treatment system, it will be easier to design a wastewater treatment system that meets QCVN 28:2010/BTNMT column B standards.

Here, Eclim Vietnam Company would like to introduce a process for treating cosmetic wastewater using biological methods, ensuring that the output wastewater meets QCVN 28:2010/BTNMT.

Beauty salon wastewater treatment process

Process of beauty salon wastewater treatment system

Step 1

Wastewater from the operating room is directed to the wastewater treatment station. Wastewater generated from the cleaning and floor draining processes of the beauty salon is led directly into the septic tank. In the septic tank, anaerobic biological treatment processes occur and the sedimentation process occurs to reduce the concentration. levels of pollutants in wastewater streams.

Step 2

Wastewater from the operating room and wastewater from the septic tank are led to the combined Anoxic conditioning tank. The anoxic biological treatment tank (combined Anoxic air conditioning) is inoculated with appropriate anoxic microorganisms to help completely remove Nitrate and partially remove COD and BOD. The anoxic biological tank is stirred with two alternating mixing pumps to help push nitrogen gas (generated from the denitrification process: NO3– ®N2) out of the waste stream.

Step 3

Water from the anoxic biological tank will be led through the aerobic biological tank. In the aerobic biological tank, aerobic microorganisms are cultured and supplied with oxygen by an aerator (combined with a fine distribution disc, providing enough dissolved oxygen for microorganisms to grow) to completely eliminate the bacteria. Set the remaining COD and BOD and convert all ammonium into Nitrate (will be reduced in the anoxic biological tank). Wastewater from septic tanks has a very high concentration of Ammonium, so the biological treatment process may require the addition of bicarbonate to provide for the nitrification process. After the wastewater is completely decontaminated, the wastewater in the tank is led through a sedimentation tank to separate the sludge from the wastewater stream.

Step 4

The sedimentation tank is designed using the gravity sedimentation method (vertical sedimentation tank). All suspended sediment will be removed through the gravity settling process. After treatment, wastewater is collected at the sawtooth trough to the intermediate tank combined with disinfection to treat all disease-causing microorganisms in the waste stream. The disinfection tank is filled with chlorine to disinfect disease-causing microorganisms.

Step 5

Wastewater is pumped out of the general drainage system. The sludge in the aerobic biological sedimentation tank is pumped to the anoxic biological tank to maintain the amount of biological sludge in the tank and for the anoxic tank to reduce the remaining Nitrate in the waste stream. After a period of time, the sludge in the biological tank will be high. The excess is discharged into the septic tank and periodically removed.

Step 6

After passing through the intermediate tank for disinfection, all COD, Nitrogen, Phosphorus, and disease-causing microorganisms are removed from wastewater. Treated wastewater meets standards according to QCVN 28:2010 – BTNMT – column A.

Advantages of beauty salon wastewater treatment systems 

• Investment costs are lower than other methods
• Simple operation
• Short construction time
• High processing efficiency