Originally Posted by reefmonkey on KKU
Q:
Kevin why doesnt the catlitter become
clogged by the bacteria’s polymeric adhesive over time?
A:
The polymeric adhesive from bacteria that often will adhere to
most aquatic surfaces form very complex and heterogeneous microbial communities
called “biofilms”. Sometimes these biofilms are beneficial to a system, like
that; that you see in pipes and in other circumstances they are undesirable and
will clog filter elements to the point of hindering, channeling and even
stopping altogether water flow. The truth be told, the direct prevention of
bacterial adhesion and the formation of undesirable biofilms in our filter
would lessen the likelihood of clogging of micro-particles on those substrates
or mediums. For the hobbyist understanding the subsequent formation of friendly
biofilm formation and their development are crucial in that they will inhibit
the formation of undesirable biofilms and promoting the establishment of useful
biofilms.
However, undesirable biofilms are
indistinguishable from good mature biofilms that are localized groups of
bacterial cells on filter medium that produce extracellular polymeric
substances to form good mature biofilm. There is a link between the initially
adhering bacteria and the biofilms that subsequently form. Understanding the
physiological chemical properties of the medium e.g. surface area potential,
its roughness, pore structure and hydrophobicity will affect the rate of
initial bacterial adhesion and subsequently the formation of biofilm if it’s
needed or not for cell reproduction utilization. The mechanism of initial
biofilm formation is useful in the understanding the inhibiting or the
promotion of the formation of biofilms. By the modification of a specialized
surfaces (like that of cat litter) and /or chemical grafting have been used to
inhibit the promoting of bacterial adhesion of mature biofilm formation. This
relationship between bacterial cells and surfaces change with positively or
negatively charged substrates modifies the fictionalization and improves
important properties such as the ability to attract bacterial cells. Most
bacterial adhesion is for the prevention of water-shear from fluid dynamics,
which is limited in the Biocenosis Baskets because fluids move very slowly.
So now you understand, the
electrical charge of the substrate and the movement of fluids through that
substrate, and the substrate itself, influences the strategies for controlling
biofilms.
Dr. Lio Fornellino the best friend I never knew that did
extensive testing on the Anoxic Filtration System in Italy.
Anoxic Filtration Book... Still free
on Apple's iBook store
No comments:
Post a Comment