Proposed technology diagram
Technology diagram of resort wastewater treatment
Explanatory process technology
Resort wastewater from septic tanks and from kitchens and restaurants of the resort area is gathered by drainage system running to centralized wastewater treatment system.
Bar screen. Waste water flows into the raceways, where trash is placed to remove organic impurities of a large size such as nylon bags, bandages, scrap paper … to avoid damaging or obstructing the pump and subsequent works. follow.
Oil separation tank. Because resort wastewater generated from the dining area contains a high content of grease, without proper treatment it will inhibit the activity of microorganisms in the water. Therefore, the task of separating the grease tank is to separate and hold the grease in the tank before leading into the treatment system, avoiding clogged pumps, pipes and reducing the biological process behind. Separated grease periodically removed as prescribed.
Air tanks. A collection of wastewater sources into a single and simultaneous source for continuous operation of the system. Due to the nature of the wastewater fluctuating according to the time of day, (depending on factors such as the source and the time of discharging water), the regulating tank is an indispensable unit in any Any sewage treatment station. Especially for resort wastewater. Conditioning tank is responsible for regulating the flow and concentration of wastewater, creating a stable and continuous working regime for treatment facilities, avoiding the phenomenon of overloaded treatment systems.
Waste water in the regulating tank is continuously aerated by air blower and air distribution disc system to avoid anaerobic phenomenon at the bottom of the tank. Waste water after regulation tank is pumped to anaerobic biological tank.
Anaerobic tank. 4 stages, occurring simultaneously in anaerobic decomposition of organic matter are: hydrolysis, acidification, aceticization, methaneization. In the 3 phases of hydrolysis, acidification and aceticization, COD is almost unchanged, COD only decreases in methane phase. Perform nitrate reduction and partial reduction of organic compounds.
Anoxic tank. In wastewater, containing nitrogen and phosphorus compounds, these compounds need to be removed from the wastewater. At Anoxic tanks, under anoxic conditions, anoxic microorganisms develop to handle N and P through nitrification and phosphoril.
The nitrification process occurs as follows:
The two main types of bacteria involved in this process are Nitrosonas and Nitrobacter. In an oxygen-deficient environment, these bacteria will denitrify Denitrificans, which will separate the oxygen of Nitrate (NO3-) and Nitrite (NO2-) in the NO3- → NO2- → N2O → N2 ↑
Aerotank. Aerobic decomposition processes rely on the activities of aerobic microorganisms, especially aerobic bacteria, that use dissolved oxygen in water to break down organic matter in wastewater.
This process takes place strongly if using an impact method such as aeration, increasing the activity of microorganisms by increasing the activated sludge, adjusting the nutrient content and inhibiting the toxins that make the image. affect the process of microbial activity.
Clarifier. The task of settling microbial sludge from biological processes and separating these sludge from wastewater.
– Waste water is directed into the center pipe of the device. Wastewater after exiting the central pipe is evenly distributed over the entire horizontal area at the bottom of the central pipe. The central tube in the settling device is designed so that water coming out of the central tube has the slowest upward velocity of the water in the device (in a stationary state), when the residues are formed sufficiently large to win. The velocity of the effluent will go to the bottom of the settling tank. Waste water from sedimentation equipment has COD concentration reduced by 80-85%. The sediment at the bottom of the tank is partially pumped to the biological tank and the residual sludge will be pumped to the sludge tank.
The clear water on the surface is concentrated into the water collection trough through the filter tank.
Filter tank. Filtering of smaller sized dregs that have not been deposited in the settling tank. Next, water is led through the disinfection tank.
Disinfection tank. Here Chlorine is added to the water at the appropriate concentration and dosage to kill harmful bacteria and microbial larvae. Output water reached QCVN 14:2008/BTNMT.
Mud tank. Hold and separate sediment. Sludge will be periodically transported, dumped or buried. The water after sediment separation will be returned to the conditioning tank for further treatment.
Place of application
- WWTPs for the Mövenpick Cam Ranh Resort and Resort, Cam Ranh, Khanh Hoa
- Wastewater Treatment System for Ariyana Convention Centre, Da Nang City
- Water Treatment Plant Super Project Mikazuki Spa & Hotel Resort.