Q25. | Ventilation of sewer lines is necessary to : |
Q26. | Critical factors for the activated sludge treatment process are : |
Q27. | The unit in which both sedimentation and degestion processes of sludge take place simultaneously is : |
Q28. | From amongest the following sewage treatment options, largest and requirement for given discharge will be needed for : |
Q29. | The BOD removal efficiency, in precentage, during primary treatment, under normal conditions is about : |
Q30. | The trickling filter is designed to remove: |