denitrification; (h) single sludge activated sludge process for carbonaceous oxidation, nitrification, and denitrification; (i) sequencing batch reactor (SBR);
(j) membrane bioreactor (MBR); (k) oxidation ditch process; (l) aerated lagoon,
etc. The effluent of the suspended-growth bioreactor (aeration tank, or oxygenation tank, or mixing tank) discharges to a solid-water separator (sedimentation
clarifier, flotation clarifier, or membrane filter) for additional processing.
Swarm It represents a large number of worker bees and drones, and usually the old
queen leaves the parent colony to establish a new colony.
Swarming It is the natural process of honey bee reproduction at colony level.
Tabletop exercise A discussion-based exercise intended to stimulate discussion of
various issues regarding a hypothetical situation. Tabletop exercises can be used
to assess plans, policies, and procedures or to assess types of systems needed to
guide the prevention of, protection against, response to, or recovery from a
defined incident. Tabletop exercises are typically aimed at facilitating understanding of concepts, identifying strengths and shortfalls, and/or achieving a change in
attitude. Participants are encouraged to discuss issues in depth and develop
decisions through slow-paced problem-solving rather than the rapid, spontaneous
decision-making that occurs under actual or simulated emergency conditions.
Tabletop exercises can be breakout (i.e., groups split into functional areas) or
plenary (i.e., one large group).
Tailings It is a maintenance operation for reclaiming or eliminating mine tailings
through dredging that supports efficient mine operations. Typical sectors include
iron ore, gold, and oil sands where reclamation of tailings can have a positive
return on investment.
Technology It is professional field involving the application of known knowledge
as a “tool” that extends human capability (e.g., from hammers to the internet).
Teragram 1 trillion (1012) grams ¼ one million (106) metric tons.
Terminal elevation, dredge It is the vertical height above the centerline of the
dredge pump and the final point of discharge.
Tertiary flotation clarification A dissolved air flotation clarification process,
which is used for advanced or tertiary treatment with a main purpose of nutrient
removal or wastewater renovation.
Tertiary membrane clarification (or tertiary membrane separation, or tertiary
membrane filtration) A water-solid separation/clarification process uses membrane device instead of conventional sedimentation clarification in the tertiary
wastewater treatment step, such as nitrification and denitrification.
Tertiary treatment It is a wastewater treatment step after secondary treatment,
meaning tertiary treatment is for treating the secondary effluent in that most of
organic substances have been removed. Normally, tertiary treatment includes
nitrogen removal processes, phosphorus removal processes, granular activated
carbon, granular media filtration, membrane filtration, and postaeration.
Theme, ArcView An ArcView theme stores map features as primary features (such
as arcs, nodes, polygons, and points) and secondary features such as tics, map
extent, links, and annotation. A theme usually represents a single geographic
layer, such as soils, roads, or land use.
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