Wastewater Story|What Is Sewage?|Wastewater Treatment Plant|Became An Active Citizen|Better Housekeeping Practices|Sanitation And Disease|Alternative Arrangement For Sewage Disposal|Sanitation At Public Places|OMR

Three statements are provided here which define the terms – (a) sludge (b) sewage and (c) wastewater. Pick out the correct definition for each of these terms. (a) The settled solids that are removed in wastewater treatment with a scraper. (b) Water from kitchen used for washing dishes. (c) Wastewater released from homes, industries, hospitals and other public buildings.

Given below are the steps involved in sewage treatment. Arrange them in proper sequence and select the correct option. A. Passage of primary effluent into large aeration tanks for mechanical agitation and pumping of air. B. Passage of secondary effluent and formation of activated sludge. C. Physical removal of particles through filtration and sedimentation D. Release of effluent from the secondary treatment plant into natural water bodies. E. Growth of useful aerobic microbes into flocs which significantly reduce the BOD.

State whether the following statements are True or False. In case a statement is false, write the correct statement. (a) Sewage is a solid waste which causes water pollution and soil pollution. (b) Used water is wastewater. (c ) Wastewater could be reused. (d) Where underground sewerage systems and refuse disposal systems are not available, the high cost on-site sanitation system can be adopted.