View
221
Download
0
Category
Preview:
Citation preview
Alkalinity – The capacity of water to neutralize acids; caused by the water’s content of
carbonate, bicarbonate, hydroxide, and occasionally borate, silicate, and phosperate.
Apparent Colour – Colour of water/suspended matter in raw/untreated water
True Colour – Colour of the water from which turbidity has been removed.
Cathodic Protection – n electrical system for prevention of rust, corrosion, and pittin!
of metal surfaces which are in contact with water or soil. low volta!e current is "owed
throu!h a li#uid. This concentrates corrosion on auxiliary anodic parts.
Jar Test – a #uic$ test of water to simulate coa!ulation/"occulation with of the same
water in multiple %ars with di&erent chemical doses added to estimate the ideal
coa!ulant dose needed.
Grab Sample – sin!le sample collected at a particular time and place that represents
the composition of the water only at that time and place. 'mmediate results for a speci(c
water supply.
Polymer – )on! chain molecule formed by the union of many smaller molecules. *sed
with other chemical coa!ulants to aid in bindin! small suspended particles to lar!er
chemical "ocs for removal from water.
Coagulant Aid – any chemical used to assist or modify coa!ulation
Coagulation – the clumpin! to!ether of (ne particles into lar!er particles to ma$e it
easy to separate from water.
Suspended Solids – solids that "oat on surface or suspended in water/wastewater or
other li#uids. lso the #uantity of material removed from water in a laboratory test.
Colloids – very small, (nely divided solids that remain dispersed in a li#uid for a lon!
time due to their small size and electrical char!e.
Short Circuiting – when some of the "owin! water enterin! a tan$ "ows alon! a direct
pathway from the inlet to the outlet, which results in shorter contact, reaction, or and
lon!er settlin! times
Flocculation – !atherin! to!ether (ne particles after coa!ulation to form lar!er particles
by !entle mixin!
Floc – clumps of particulate impurities that form as a cluster as a result of "occulation
Detention Time – the theoretical time re#uired for a small amount of water to pass
throu!h a tan$ at a !iven "ow or the actual time that a small amount of water is in a
basin.
Clarifer – a lar!e tan$ in which water is held for a period of time so that sedimentation
can occur.
Inorganic – material such as sand, salt, iron and other mineral materials. +f mineral
ori!in.
rganic – substances that come from animal or plant sources. lways contain carbon.
Tube Settler – a device that uses tubes installed on an incline to aid sedimentation or
particle removal
!ead "oss – the pressure lost by water "owin! in a pipe or channel as a result of
turbulence caused by the velocity of "owin! water and the rou!hness of the
pipe/channel. riction losses.
"aunders – sedimentation basin and (lter dischar!e channels consistin! of over"ow
weir plates and conveyin! trou!hs.
Recommended