How is FBR process incorporated with SBR?
Among the different methods now employed for industrial wastewater treatment, two sophisticated techniques within BIOLOGICAL TREATMENTS stand out as particularly successful in eliminating organic matter (measured as COD) and nitrogen.
SBR (SEQUENCING BATCH REACTOR)
SBR biological treatment facilities are appropriate for treating wastewater with a discontinuous flow rate and discharge regime, as well as considerable fluctuations in pollutant load.
Conventional wastewater treatment systems include numerous tanks, each with its own specialized purpose of reaction and separation of the solid fraction or sludge, all of which operate concurrently and in a continuous mode. These activities can be performed consecutively by SBR processes in a single reactor that passes through multiple time periods.
The whole process of removing organic waste and nutrients is divided into five stages:
Filling or feeding the rector, aeration, anoxic phase, settling, and discharge.
The SBR process typically employs two or more reactors that operate in simultaneously. This allows a cycle to be constructed that combines the phases in the reactors to treat the whole wastewater flow and produce a consistent effluent.
FBR (FLOTATION BIO-REACTOR)
The FBR system, also known as a flotation bio-reactor, is a biological system that allows for the continuous and compact removal of contaminants. These systems are usually more efficient than traditional activated sludge systems in terms of organic matter and other biodegradable pollutants removal, footprint, and sludge formation.
FBR system consists of a biological reactor in which microorganisms consume organic matter and nitrogen is removed: the wastewater is pumped to an aeration reactor where the biological treatment is carried out, which consists of the removal of organic matter and nutrients in wastewater through the action of microorganisms in the presence of oxygen.
Following that, the biomass is separated using flocculation and secondary clarification in a clarifier particularly built to separate the biomass from the treated water using dissolved air flotation DAF technology. The use of polyelectrolyte as a flocculating agent often aids separation.
Incorporation of SBR – FBR Process
The combination of SBR and FBR for the removal of organic contaminants and nitrogen by nitrification/denitrification is offered as a successful method that permits to solve two of the most noteworthy obstacles of industrial wastewater treatment:
A: The SBR - FBR Process eliminates the stop and idle times (settling and discharge) of an SBR process, allowing for NON-STOP waste water treatment while retaining the benefits of an SBR process.
B: The use of a DAF clarifier as part of the system allows for very efficient solid separation, with sludge concentrations of up to 5%, resulting in a reduction in sludge generation when compared to sedimentation carried out in the SBR reactor itself, and reaching up to 9000 mg/l of MLSS biomass concentration inside the reactor.
When there are two or even more tanks in which the biological treatment is performed, the optimization model can be used.
This method can be used in the following
1: The treatment plant is being built from the ground up.
2: Constant remodelling and enhancement of existing plants.
3: Plants with SBR process that isn't performing effectively need to be remodelled and improved, or sludge sedimentation has to be optimized.
Following are the process's operating principles-
The reactors will operate alternately and in a constant set:
-Initially, one of the reactors will be filled and the reaction phase will be carried out (using an ANOXIC - AEROBIC sequence), followed by its discharge.
-During the filling and response of a tank, the discharge of the second tank is performed so that the feed to the process and the effluent to the DAF remain constant.
-Because this work regime has no effect on the capacity to accept wastewater, the whole design flow may be treated continuously. A sequence for two or more tanks can be created.
-Each reactor's aeration system is set according to the aeration periods and flow rates. Except for valve reconfiguration and the installation of a DAF unit, no special equipment building or reform of existing equipment and tanks is necessary in the event of optimization of existing facilities.
-Including an ANOXIC PHASE in the chemical sequence allows for nitrogen removal via nitrification/denitrification.
-The AEROBIC PHASE is designed such that the aerobic cell residence period is long enough to eliminate COD.
Choosing the Most Appropriate Wastewater Treatment System!
When selecting a system, there is a lot to consider, so it is critical to do some research.
An ideal system is one that will withstand the test of time while requiring minimal initial and ongoing costs. At Netsol Water Solutions, our wastewater or sewage treatment systems have proven to withstand the test of time while remaining very affordable.
It goes without saying that a system must meet current public and environmental health and safety standards and regulations. Our treatment systems are built to the highest standards and have the least amount of environmental impact.
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