DEVISE - Model MBBR-IFAS - Moving Bed Bioreactor & Integrated Fixed Activated Sludge
From Technologies
DEVISE ENGINEERING S.A. effectively utilizes the so-called MBBR-IFAS process in its packaged “High-Speed Bio-Plants” which are designated for small- and medium-scale biological wastewater treatment applications, both municipal and industrial. The MBBR-IFAS process has been established in the past 20 years as a simple yet robust, flexible, and compact hybrid technology for wastewater treatment. The term hybrid refers to the fact that the MBBR-IFAS process adopts the best from both suspended and attached growth systems while, at the same time, trying to minimize the deficits of each.
Product Details
The hybrid nature of the MBBR-IFAS process relies upon the simultaneous incorporation of suspended and attached biomass in the same reactor. The former (i.e. MLSS) is usually kept well below 3000 mg/L, whereas the latter (i.e. biofilm) is established by using specially engineered plastic carrier elements for biofilm attachment held in suspension throughout the reactor by turbulent energy incurred by diffused coarse-bubble aeration, liquid recirculation, or mechanical mixing energy. In the majority of applications, the reactor is filled between one-third and two-thirds full with carriers. Perforated plates or sieves installed on the effluent-end of the reactor allow treated water to pass though to the next treatment step, but retain the media inside the reactor.
The MBBR-IFAS process has demonstrated reproducible success with biochemical oxygen demand (BOD) elimination, ammonia oxidation, and nitrogen removal applications, in a variety of different treatment configurations, aimed to meet a wide range of effluent quality standards, including stringent nutrient limits.
Perhaps the most impressive aspect of the MBBR - I...
Perhaps the most impressive aspect of the MBBR - IFAS process lies in its versatility, allowing creative solutions by design engineers. Specifically, the MBBR-IFAS process offers the following basic advantages in comparison with other more conventional wastewater treatment technologies:
- Ability to increase capacity or improve performance by adding more media (high retrofit and/or upgrade potential)
- Additional biomass for treatment without increasing the solids loading on final clarifiers
- Higher-rate treatment processes possible, thus resulting to greater treatment in a significantly smaller footprint
- Development of specialized biomass for carbon and nitrogen removal in multi-compartment reactor configurations
- Improved settling characteristics (reduced SVI values)
- Reduced sludge production
- Improved recovery from process upsets
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