Envi Concepts Flashcards
Water Quality Guidelines
DAO 34
General Effluent Standards
DAO 35
Water Quality Guidelines and General Effluent Standards
DAO 2016-08
Class of water intended for primary contact recreation such as
bathing, swimming, skin diving, etc.
Class B
The resistance of water to the passage of light through it is a measure
of the
turbidity
The total solids in water are due to the presence of
a. suspended and dissolved solids
not a physical characteristic of wastewater
hardness
It is the phenomenon that results in the overabundance of algae
growth in bodies of water. It is also the natural process of nutrient
enrichment that occurs over time in a body of water.
eutrophication
Measure of the total organic and ammonia nitrogen in the
wastewater. It also gives a measure of the availability of nitrogen for
building cells.
TKN
Involves the accumulation of trace metals through each species of
the food chain.
biomagnification
Type of wastewater treatment that employs physical and chemical
treatment methods to remove or reduce a high percentage of
suspended solids and toxic materials.
a. Primary Treatment
Hard water can be softened by
b. passing it through an ion exchanger
Removal of all settleable particles rendered settleable under the
influence of gravity, basically the theory of gravity under the influence
of which all particles heavier than water tend to settle down.
sedimentation
In facultative stabilization pond, the sewage is treated by
a. aerobical bacteria
c. algae
b. anaerobic bacteria
d. both (a) and (b)
d. both (a) and (b)
Process whereby coarse matter (suspended or floating) of a certain
size can be strained out of flowing water with the aid of bars, fines
wires or rocks.
a. screening
