Water Treatment: Wastewater Part 1

Primary Treatment * Explain what wastewater is where it comes from and why it must be treated. * Define the following terms: sewer sewage and effluent. * Describe processes and equipment typically used in wastewater collection and primary treatment. * Explain water pH adjustment. * Describe the process of clarification and explain how an upflow clarifier works. Intermediate Treatment * Describe how clarification is used with chemical precipitation to remove some types of dissolved materials. * Describe the principles of operation for dissolved air flotation. Secondary Treatment * Define the following terms: organic material anaerobic aerobic activated sludge micro-organisms return activated sludge waste activated sludge and mixed liquor. * Describe the activated sludge process. * Explain the basic requirements for microorganisms to work efficiently in the activated sludge process. * Define sludge handling. * Describe some typical methods of sludge handling.