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Unformatted text preview: 1. Suppose we use C 106 H 263 O 110 N 16 P as a chemical representation of algae. a. Determine the mass in mg of each element in 1 g of algae. b. Suppose there are 0.10 mg of nitrogen and 0.04 mg of phosphorus available for algal production per liter of water. Assuming adequate amounts of the other nutrients, which is the limiting nutrient? c. What mass of algae could be produced? [mg algae per L of water] d. If the nitrogen source could be cut by 50 percent, how much algae (mg/L) could be produced? e. If the phosphorus source could be cut by 50 percent, how much algae could be produced? 2. The biochemical oxygen demand (BOD) of water is proportional to the amount of waste that is polluting the water. In calculations related to the amount of waste in the water, the BOD can be treated just as we did with pollutant concentrations in Chapters 1 and 2. If you skim through pp. 202219, you will see that the governing equations are quite similar to what we derived back in the earlier chapters, using the concepts of exponential growth and decay.derived back in the earlier chapters, using the concepts of exponential growth and decay....
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- Fall '08