wasteWater Treatment
Specializing in Systems to Treat wasteWater
The wastewater treatment process involves transforming wastewater into effluent with minimal environmental impact, allowing it to be safely released back into the environment.
Additionally, this process can be essential for industrial plants, enabling their facilities to directly reuse the treated water.
DS21 holds many patents and places emphasis on the research and development process to pioneer advanced, environmental conscious physical separation and biological wastewater treatment technologies.
Researching Large-Scale Wastewater Treatment or Management Systems?
Treatment Methods
physical
wasteWater Treatment Methods
Physical Separation
Wastewater treatment systems designed utilizing varying separation technologies to treat wastewater.
Wastewater Treatment Package
Utilizing (DAF or IAF Separators)
Wastewater Treatment Package
for wastewater
Treatment Methods
biological
wasteWater Treatment Methods
Biological
The biological treatment process is designed to remove COD, BOD, total nitrogen and pollutants at lower concentrations, such as phenol, benzene, sulphide and oil. It can withstand large hydraulic and solid loads, as well as pH changes.
Activated Sludge (AS) process
In the Activated Sludge (AS) process, biomass is freely suspended. This process involves extended aeration of activated sludge. In the aerobic zones, the activated sludge biomass converts contaminants in the feed water to mainly CO2, H2O and nitrates. In the anoxic zones, nitrates are reduced to nitrogen gas.
Recycled Activated Sludge (RAS)
Effluent from the cooler flows to the AS tank, where it is combined with biological sludge from the clarifier by means of Recycled Activated Sludge (RAS) pumps. This sludge recirculation process adjusts the biomass concentration in the activated sludge tank, maintaining the biological treatment operating parameters and achieving the outlet requirements.
jet aeration system
Biomass and effluent are continuously homogenized in the activated sludge tank by a jet aeration system. An oxygen measurement in the tank controls the VSD on AS blowers, ensuring the required airflow rate. Air is sent through AS diffusers to provide sufficient dissolved oxygen for the biomass to consume the contaminants.
gravity clarifiers
As the contaminants are consumed, biomass is produced. The bio-treated water and suspended biomass are sent to a set of suction-type gravity clarifiers, where biosolids are separated and reused (RAS). To control sludge retention time and biomass concentration in the biological treatment, excess sludge (WAS) is regularly removed from the downstream clarifier.
