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Environmental Engineering 2 - Planning for sewerage system notes

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ENVIORNMENTAL ENGINEERING-II UNIT – I Planning for Sewarage Systems PART – A 1. What are the types of treatment processes? 1) 2) 3) 4) Preliminary treatment Primary treatment Complete final treatment Secondary treatment 1) Anaerobic lagoons 2) Septic tank 3) Inhofe tank 4. What is means by screening? Screening is the very first operation carried out at a sewage treatment plant and consists of passing the sewage through different types of screens so as to trap and remove the floating matter such as process of cloth, paper, wood, cork, hair, fiber etc. 5. What is the purpose of providing screen? The main idea of providing screens is to protect the pumps and other equipments from the possible damages due to the floating matter of the sewage. It should be used for removing the floating matters. Exudation ponds Filters Aeration & tangles Aerated lagoons 2. What are the various sources of wastewater generation? I. Industrial Wastes II. Domestic wastes III.Agricultural Wastes 3. List out the types of anaerobic bio logical units? 6. What are the types of screen? Classification based on size of the opening 1) Coarse screens 2) Medium screens 3) Fore screens Based on shape Rectangular for coarse and medium screens Disc or Drum for fore screen 7. Define bar screen? Rectangular shaped coarse and medium screens are made of steel bars fixed parallel to one another at desired spacing on a rectangular frame and are called bar screen. 1) Burning 2) Burial 3) Dumping Burning of ...
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