Question

Introduction to environmental

(4-1, DC 332) Glutamic acid
(C_{5}H_{9}O_{4}N) is used as one of the
reagents for a standard to check the BOD test. Determine the
theoretical oxygen demand of 150 mg/L of glutamic acid. Assume the
following reactions apply:

C_{5}H_{9}O_{4}N + 4.5O_{2}
→5CO_{2} + 3H_{2}O + NH_{3}

NH_{3} + 2O_{2} →
NO_{3}^{-} + H^{+} + H_{2}O

- (4-3, DC 332) If the BOD
_{5}of a waste is 220 mg/L and the ultimate BOD is 320 mg/L, what is the rate constant (base 10)? - (4-5, DC 332) Convert the rate constant found in problem 2 to base e.
- (4-7, DC 332) Assuming that the data in problem 2 were taken at
20
^{o}C, compute the rate constant at temperature of 15^{o}C. - (4-15, DC 333) Using the Thomas Method, calculate the BOD rate constant ((in base e) from the following data:

t, day |
2 |
5 |
10 |
20 |
35 |

BOD, mg/L |
86 |
169 |
236 |
273 |
279.55 |

**Solids**: The laboratory analysis of 25 mL sample after filtration gave the following data:

- Weight of the filter disk after drying at 103
^{o}C and 550^{o}C = 5.31g - Weight of the filter disk and sample after drying at 103
^{o}C = 5.374g - Weight of the filter disk and sample after igniting at 550
^{o}C = 5.339g

Determine the concentrations (in mg/L) of: a) Total suspended solids (TSS), b) Volatile suspended solids (VSS), and c) Fixed suspended solids (FSS) of the water sample.

Answer #1

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