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4. SECONDARY CLARIFIER OPERATION - The secondary clarifier is an indispensable component of secondary biological wastewater treatment. (a) Describe the effect of a poorly operating

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4. SECONDARY CLARIFIER OPERATION - The secondary clarifier is an indispensable component of secondary biological wastewater treatment. (a) Describe the effect of a poorly operating secondary clarifier on the overall BODs removal in an activated sludge plant (15 points); (b) describe the effect of the same problem if the secondary clarifier is part of a trickling filter system (10 points). The answers are supposed to be "qualitative", not quantitative. Please respond in bullet form, be specific and use short sentences. Need justification/explanation for each effect

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