aerated lagoon grit chamber trickling filter oxidation ditch

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keep the depth of flow in the channel above a certain value maintain constant mean velocity in the channel measure the rate of flow in the channel provide easy passage of solid particles

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sluice valve, check valve and meter stopcock. meter and sluice valve ferrule, check valve and gooseneck ferrule, stopcock and gooseneck

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Chlorination, aeration, sedimentation, rapid sand filter Coagulation, sedimentation, slow sand filter, chlorination flocculation, Coagulation, clarification, pressure filter Aeration, plain sedimentation, slow sand filter, chlorination

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diluting with nutrient free water very often copper sulphate application thorough mixing weed cutting

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due to flow of nitrates and phosphates into stagnant bodies of water growth of blue-green algae supersaturation of water with dissolved oxygen due to green algae mats decomposition of organic bottom muds

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human elements is involved in collection and transportation of human waste vehicles are required to carry night soil recurring cost is high vast areas for disposal are necessary

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separate system conservancy system partly separate system combined system

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waste water from kitchen any waste water of domestic or industrial origin waste water from bathrooms drainage from roads

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collection + conveyance + treatment + ultimate disposal of sewage collection + conveyance + treatment of sewage collection + conveyance of sewage collection of sewage

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