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