Aquasust Super MBBR Media
MBBR process is based on attached growth microbial communities growing as biofilm on specially designed MBBR media. These microbial communities developed on MBBR media are playing major role in the biochemical oxidation of pollutants present in the wastewater as BOD, COD and Ammonia Nitrogen. Because of this reason MBBR media having properties which allows efficient and optimum growth of these biofilms are of prime importance for any MBBR and IFAS based attached growth process for biological wastewater treatment.
Since the invention of MBBR technology, the development of MBBR media has been focused solely on utilizing various plastic materials like Poly Propylene (PP), High Density Polyethylene (HDPE), Low Density Polyethylene (LDPE) and other suitable plastic materials. By and large all plastic MBBR media have cylindrical or circular shape providing varying levels of surface area for biofilm development on it.
The primary assumption of this development is based on the hypothesis that more surface area provides more biofilms which eventually results in more removal rates and higher process economy.
However, it has been observed with these plastic MBBR media that biofilms grow only on the inner void surface while the biomass from outer surface area of the MBBR media is sloughed off due to various reasons. To account this phenomenon, specific surface area (SSA) and protected surface area (PSA) per m3 volume of MBBR media provided are extensively used to estimate the efficacy of plastic material based MBBR Media. At present different plastic MBBR media having different shapes and size are offering SSA of 500-4000 m2/m3.
However total surface area or protected surface area alone can not be taken as sole measure of MBBR media efficiency for its better performance. Apart from surface area other important properties such as media surface material, its texture, porosity, geometry, orientation of media plays crucial role. These properties greatly affect the MBBR process design and performance to a greater extent.
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