The detention period of a septic tank is

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• The detention period of detritus tank is
• The disposal of sewage from the septic tank is done by which of the following?
• The concentration of biodegradable organic matter after the septic tank is
• What is the maximum design flow of sewage in a septic tank?
• Which of the following is not the method of disposal of sewage from septic tank?
• The minimum depth of septic tank as per design consideration is
• The detention period of oxidation pond is
• The design velocity of flow of a detritus tank is                          
• How many types of settling are there in the sedimentation tank?
• The average time required by water to pass through the settling tank is called