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Take home exam for Wiboonwarn

[due date: 26th December 2014]

1) What is the function of polyelectrolyte?

2) In a standard five-day BOD test, why is it usually necessary to dilute the sample?

3) Explain the process to determine total dissolved solids from American Society for Testing and Materials (ASTM). 4) Explain and sketch the system of wastewater treatment

plant in your province.

5) Explain the fixed-film reactor.

6) How to remove nitrogen in wastewater?

7) What health concern is causing some municipal water treatment agencies to convert from chlorine to

chloramines?

8) What is the purpose of an anaerobic digester?

9) State and explain the purpose for which each is used:

a) O2 b) CO2 c) Ca(OH)2

(2)

11) What are the different processes between water treatment and wastewater treatment?

12) What are the key advantages and disadvantages of using sodium hypochlorite versus chlorine for

disinfection?

13) Name and briefly describe a treatment technology that is used to remove or transform each of the following species from wastewater

a) Pathogens b) suspended particles > 30 m

Referensi

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