8 Flashcards
what is considered when selecting the type of treatment water will receive
both the source quality and the desires/ required quality of the drinking water
how to dam affect the water quality
damn allow for the slowing of water velocity and the settling/ precipitation of suspended sediment in theater
what are the 3 characteristics of water
quanity
quality
timing
what do water treatment process treat for
colloidal, dissolved and suspended matter in water
what are the drinking water parameters
chemical
physical
microbiological
radiological
what is the highest priority contaminant and why
microbiological contaminants such as bacteria, protozoa, and viruses
in many cases this section carries orgaminss that are infections or pathogenic
how are chemical guidelines established
wheter or not the chemical of concern can lead to health effects and is found at high enough concentrations in the untreated water
what does water temp impact
chemical, microbial, biochemial and phycial processes
what do AOs stand for
aesthetic objective- is it pleasant to drink?
what do ALARA stand for
as low as reasonably achiveable
what do MAC stand for
maximal acceptable concnentration
which disinfection methods are used for drinking water and why?
chlorine contact time- able to kill pathogens via breaking bonds
UV- effective against cryptosporidium
what are the advantages of raw water storage
Pros: Help ensure water availability during low flow periods while allow for the quality of the raw water to increase (natural settling of particles)
Cons: Management is sometimes needed so that quality is maintained.
can reduce water quality during high flow.
