Objectives of biological treatment, Other Management

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Question 1:

(a) What are the four objectives of biological treatment?

(b) Describe fully the process microbiology for

(i) Anaerobic digestion

(ii) Composting of sludge

(iii) Facultative pond treatment

Question 2:

You are working in a textile factory and have been requested to carry out a wastewater characterisation study. Describe fully the parameters that you would consider in your study and their importance.

Question 3:

(a) Describe the following processes

(i) Chemical precipitation
(ii) Suspended growth processes
(iii) Attached growth processes
(iv) Co-precipitation
(v) Adsorption
(vi) Disinfection

(b) Describe the precautions that should be taken by plant operators while handling chlorine gas used in disinfection of wastewater


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