MBBR Media size, shape of voids and inner porosity
Large voids tend to cause detachment of biofilms due to high shear forces and thus would increase the biofilm formation time during the initial colonization. During the event of toxic shock loads, a larger fraction of the biofilm is exposed to the toxicity which may cause performance deterioration.
Smaller and deeper voids allow for rapid formation of biofilms within the deeper pores due to lower sloughing off during start up process. Fine pore structure with deeper voids also protects bacteria against toxic shock loads. So MBBR media with fine pore structure offer much better protection against shock loads and quicker start up compared to the element having large and open voids.
Finer voids also allow for growth of thinner biofilms which keeps a large fraction of biomass present in the biofilm exposed to the bulk liquid of the reactor for substrate uptake. This offers better diffusion gradients allowing better removal efficiencies.
Finer and deeper cavities allow for growth of specific type of microorganisms such as Anammox bacteria and Denitrifying bacteria within the inner pores increasing the process efficiency and reliability over the period of operation. However, too fine pore structure may tend to clog the carrier material with excessive biofilm formation within the inner pore and make it heavier. Further due to poor accessibility of the inner pore for substrate, the inner biofilms become less active and redundant over period of operation.
Thus, a MBBR media material having adequate fine pore structure and inner porosity is very much desirable as it offers numerous benefits such as:
-
Faster and better colonization
-
Protection of bacteria against shock loads at the same time provides adequate accessibility to inner biofilms for better substrate diffusion.
-
Adequate detachment, shearing and erosion of biofilms on continuous basis to prevent excessive growth and clogging.
-
Thinner biofilm growth with better diffusion gradients allowing better substrate uptake and removal efficiencies.
On the contrary present plastic material based MBBR media element have larger voids which has many disadvantages such as:
-
Poor initial colonization due to shearing of biomass during start up.
-
Minimal protection against toxic shock loads before thick biofilms are formed with EPS to protect them.
Poor diffusion gradient with less accessibility to inner biofilms under thick biofilm formation.
Hot Tags: wastewater mbbr floating bio media, China, suppliers, manufacturers, factory, cheap, in stock, free sample, MBBR Design, Mbbr Wastewater Treatment, HDPE MBBR Media, Aerobic Mbbr, Mbbr Carrier, Mbbr Sewage Treatment
