EP 1110-1-27
27 Jan 00
the oxidized, low-solubility form (MnIV, FeIII). This zone tends to be important as a buildup point for
clogging biofouling.
(aa) Shock treatment -- the application of a higher than normal chemical dose in order to maximize the
effectiveness of the treatment being applied.
(bb) Slime -- a surface growth on, or originating from, a surface which may be jelly-like in form
(typically EPS). Such slimes usually include various microorganisms and can act as sites for the
bioaccumulation of various chemicals.
(cc) Slime forming bacteria -- bacteria which produce slimes (from EPS), but do not necessarily (or
incidentally) accumulate iron within these slimes (BART acronym "SLYM" refers to these).
(dd) Sloughing -- the act of a slime, for whatever reasons, breaking up and releasing particles (from the
slime) to the water passing over the slime.
(ee) Substrate (biological) -- conceptually equivalent to available organic carbon. Also used for surfaces
on which biofilms attach.
(ff) Sulfate (or sulfur) reducing bacteria (SRB) -- anaerobic bacteria able to reduce sulfate (and some
other sulfur species) to hydrogen sulfide. This event may initiate electrolytic corrosion and/or rotten egg
taste and odors in water.
B-3
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