Biological Wastewater Treatment for Industry and Municipalities
Many different industries have various requirements for wastewater treatment, but all have one thing in common: The need for an optimized solution for wastewater treatment.
Whether we install a single treatment step, a complete wastewater treatment plant or equip an entire factory with systems for wastewater treatment – DAS Environmental Expert solutions are always tailor-made.
No matter if you need to limit discharge values to reduce wastewater charges or you need to increase process efficiency by recycling usage water, our specifically developed process for biological wastewater treatment was designed to fulfill all individual needs.
Customers of DAS Environmental Expert have been successfully using our technology for wastewater treatment in the chemical and pharmaceutical industries; the semiconductor manufacturing sector and energy industry; the cleaning and textile industries; the brewery and beverage industries; the meat and fish processing industries, and also in agriculture and municipal wastewater treatment as well as in rendering services. In all of these areas, DAS technology cleans and recycles accrued wastewaters in a safe, environmentally friendly and efficient way.
Wastewater Treatment with the MBBR Process
The MBBR (Moving Bed Bioreactor) or fluidised bed process is based on the biological process with sessile biomass (biofilm process). This allows microorganisms to grow inside the biofilms, which consist of immobilised biomass and become established on the surfaces of the filling material (substrate biology).
Advantages of the MBBR Process Over the Activated Sludge Process
Activated sludge with suspended biomass can only reach a relatively young age due to the drainage of excess sludge. In contrast, the immobilised microorganisms on the substrates in the MBBR process can reach a significantly higher age. The colonising microorganisms exhibit very long generation times. The purification process is more stable than in activated sludge plants, and loading shocks are better absorbed. The substrate material used by DAS EE features an extremely high specific surface area of 3,000 m²/m³, therefore allowing exceptionally compact MBBR bioreactors. The particular shape reliably prevents blockage of the substrate and ensures consistently high degradation efficiency.
Reduced Excess Sludge Quantity for Biofilm Processes
Excess sludge builds up, as is typical in every aerobic biological process for the decomposition of organic carbon compounds. For biological reasons, the quantity is significantly lower than in activated sludge processes of a similar capacity. The purified wastewater must typically be separated from the sludge after MBBR treatment. This can be achieved through sedimentation in a secondary settling tank, for example. It may be possible to consider forgoing sludge separation in the case of indirect discharge into a downstream municipal wastewater treatment plant if the capacity and design of the plant permits and if undesirable sedimentation processes along the transport route can be suppressed.
The MBBR plants may be designed as compact plants or modular bioreactors. The modular reactors require less space and no excavation works. The MBBR may even be designed and operated as a denitrification reactor if the corresponding process configuration permits.
Biological Wastewater Treatment with TFR Technology
TFR stands for Trickle-Flow-Reactor, also called the trickle-flow principle. The system uses a very light, small-grain carrier material that, within days, is covered by a highly active mixed population of bacteria that is adapted to their respective conditions. Unlike commonly implemented wastewater systems, the carrier material bed is not located within a closed body of water and thus can be easily supplied with sufficient amounts of oxygen. The constant inflow of wastewater that trickles down over the bed is aerated by ambient air that is supplied by a ventilator at a minimum pressure flowing in the opposite direction.