WASTEWATER TREATMENT SYSTEM FOR RESTAURANT
1. Overview of wastewater treatment system for restaurant
- For todays society, the demand for food is increasing day by day. The appearance of eateries will meet everyones essential needs. However, along with the development is that untreated wastewater from restaurants affects the environment as well as the health of the local people. Therefore, it is necessary to build a restaurant wastewater treatment system
2. Characteristics of restaurant wastewater
- Restaurant wastewater is a complex mixture of substances including:
+ Suspended solids (SS), organic matter, nutrients (N, P) and bacteria (coliforms) ).
+ The organic substances in wastewater are mainly: carbohydrates, proteins, lipids, which are easily biodegradable by microorganisms.
- When decomposing, microorganisms need to take dissolved oxygen in water to standardize the above organic substances into CO2, N2, H20, CH4, etc If the restaurants wastewater is not treated, it will be discharged into the polluted environment.
3. Technology scheme of restaurant wastewater treatment system
- Restaurant wastewater flows through the centralized drainage system to the collection hole then passed through the regulating tank to regulate the flow and concentration of the wastewater. Helps back-end processes work more stably. From the regulating tank the wastewater is pumped into the Anoxic tank.
- After the biological treatment process, wastewater overflows into the sedimentation tank to settle the microbiological sludge in the wastewater. The wastewater from the sedimentation tank will overflow to the sterilization tank. At the disinfection tank, wastewater will be chlorine. Chlorine solution is stirred and pumped into the disinfection tank by chemical metering pump.
- Oxidation of pathogenic microorganisms occurs in the tank, chlorine is a strong oxidizing agent that oxidizes the cell membrane of pathogenic microorganisms and kills them. The contact time to remove microorganisms is about 20–40 minutes.
- The sludge from the sedimentation tank is pumped from the sludge tank when the sludge is redundant and sucked up and disposed of periodically or circulated to the biological tank. Post-treatment wastewater meets QCVN 14: 2008 / BTNMT standard.
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