ESM 322 MARCH/APRIL 2015 Examination

                                                                 

                                                                    

                                                               National Open University of Nigeria

                                                            14-16 Ahmadu Bello Way, Victoria Island Lagos 

                                                                    School of science and Technology

                                                                 MARCH/APRIL 2015 Examination

           Code: ESM 322

           Course Title: WATER AND WASTE MANAGEMENT

           TIME: 2HRS

           ANSWER ANY FOUR QUESTIONS

QUESTION 1 COMPULSORY 

1ai.define portable water according to academics aictionary of geography(Lohda,2007)

aii.what is secondary treatment of effluents?

b. List and explain 4 different types of secondary treatment 

2a. with the aid of a well labelled diagram show a water softening system 

b.mention the three options of biological treatment processes in which micro-organisms convert non-settle able solids to settle able solid in secondary treatment 

3ai.define the term domestic waste water 

ii.briefly discuss the operation of wastewater treatment plant 

b.using a well filled table show levels of water treatment and their objectives

4a.mention the five types of latrine system  

  

bi.outline the physiochemical system for a non-biodegradable waste water treatment system

ii.list four sources biodegradeable waste water 

5.enumerate and write short notes on the five processes for treatment of drinking water by municipal water system 

6ai.outline the major motivational factors for recycling and reuse 

ii.mention the types of waste reuse

b.what is palatable water


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