The quality characteristics of a deep-well water in an arid region with a hot climate ar...

The quality characteristics of a deep-well water in an arid region with a hot climate are

Draw a milliequivalents-per-liter bar graph and com-pare the concentrations of chemicals with the primary and secondary drinking-water standards (Tables 5-1, 5-2, and 5-3). (a) Is the water quality satisfactory for a municipal supply without treatment? Discuss any quality problems with respect to health and aesthetic standards. (b) One recommendation is to treat the water by lime—soda ash softening to improve the quality. Will this processing provide a satisfactory quality for a public water supply? Consider each of the quality parameters of concern. What are the advantages and disadvantages of precipitation softening of this water? (c) Propose a treatment scheme that will provide a water quality adequate to meet both health and aesthetic standards. Sketch a flow diagram showing the unit processes, chemical additions, and sources of wastes for disposal. (d) Sketch an approximate bar graph of the treated water.