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Assignment 1: Physical/chemical potable water treatment You have been tasked with preparing the concept design for the primary treatment stage of a new potable water treatment plant. The primary treatment stage is to include the following: - pH adjustment by chemical dosing (Caustic Soda) - Coagulation by chemical dosing (Aluminium Sulphate) - Rapid mixing by in-line static mixers - Flocculation (mechanical paddle flocculators) - Sedimentation tanks for solids separation Tasks to be undertaken: Your tasks are summarised below: - Choose flow and quality parameters for your design - Choose the chemical dosing rates for caustic and aluminium sulphate - Prepare a concept sizing of the chemical storage tanks and bunds for the Caustic Soda and Aluminium Sulphate - Select the static mixer(s) required - Prepare a concept design of the mechanical paddle flocculators - Prepare a concept design of the primary sedimentation tanks - Prepare a process flow diagram - Estimate the annual costs for the caustic and aluminium sulphate - Estimate primary sludge generated (Flow and solids) - Submit a report Specification/data provided You have been provided with the specification and data summarised below: 1. Potable water treatment plant design flows and loads (choose from option 1 or 2 ) 2. Chemical data for caustic soda and aluminium sulphate characteristics (Materials Safety Data Sheets are on Moodle) including delivery cost 3. Storage and bunding requirements 4. Chemical dosing rates (choose from option 1 or 2 ) 5. Mixing and flocculation requirements 6. Primary sedimentation requirements 7. Primary sludge characteristics 8. Reference material (lecture notes and others provided on moodle) 1. Potable water treatment plant design flows and loads Design How Option 1 or 2 (choose an option) Design Raw Water Quality Option 1 or 2 (choose an option) 2. Chemical Data Caustic soda (MSDS is available on Moodle for reference) Aluminium Sulphate (MSDS is available on Moodle for re ference) 3. Sierage and Howing Hequirt me ats TABI. 5.1 Suzeested ehemical scrage provisions of safcty. I Source. Mackenzie Davis. Waser and waswauser engineeting. 5 Edicon, 201s. 0 MeGram-tit As it yna, 74 ther mintall Beurce: Macknvie Dasis, Water and wastmater engineering, 5k Edtion; 25t9, o MoCeaw-Hat 4. Orenkelthosine Bares Guatlis abd Nom dashe rates (Cheese frees eptian 1 er 2 ) 5. Mixing and Flocculation Requirements Static mixer FIGUNE 016 Typical static miver pressure drop selection graph for pipe dianeters from 150mm to 700inm. Source: Mackenzie Davis, Water and wastewater engineering, 5nh Edition, 2019, @ McGraw-Hill Mechanical Floceulator Sautex: Mackoneie Davit, Water and wantewaler engineting. 5 Edton, 2019, o MeGraw etit Thimary Stilime utation Tambs 7. Thmary tank aledpr Assignment 1: Physical/chemical potable water treatment You have been tasked with preparing the concept design for the primary treatment stage of a new potable water treatment plant. The primary treatment stage is to include the following: - pH adjustment by chemical dosing (Caustic Soda) - Coagulation by chemical dosing (Aluminium Sulphate) - Rapid mixing by in-line static mixers - Flocculation (mechanical paddle flocculators) - Sedimentation tanks for solids separation Tasks to be undertaken: Your tasks are summarised below: - Choose flow and quality parameters for your design - Choose the chemical dosing rates for caustic and aluminium sulphate - Prepare a concept sizing of the chemical storage tanks and bunds for the Caustic Soda and Aluminium Sulphate - Select the static mixer(s) required - Prepare a concept design of the mechanical paddle flocculators - Prepare a concept design of the primary sedimentation tanks - Prepare a process flow diagram - Estimate the annual costs for the caustic and aluminium sulphate - Estimate primary sludge generated (Flow and solids) - Submit a report Specification/data provided You have been provided with the specification and data summarised below: 1. Potable water treatment plant design flows and loads (choose from option 1 or 2 ) 2. Chemical data for caustic soda and aluminium sulphate characteristics (Materials Safety Data Sheets are on Moodle) including delivery cost 3. Storage and bunding requirements 4. Chemical dosing rates (choose from option 1 or 2 ) 5. Mixing and flocculation requirements 6. Primary sedimentation requirements 7. Primary sludge characteristics 8. Reference material (lecture notes and others provided on moodle) 1. Potable water treatment plant design flows and loads Design How Option 1 or 2 (choose an option) Design Raw Water Quality Option 1 or 2 (choose an option) 2. Chemical Data Caustic soda (MSDS is available on Moodle for reference) Aluminium Sulphate (MSDS is available on Moodle for re ference) 3. Sierage and Howing Hequirt me ats TABI. 5.1 Suzeested ehemical scrage provisions of safcty. I Source. Mackenzie Davis. Waser and waswauser engineeting. 5 Edicon, 201s. 0 MeGram-tit As it yna, 74 ther mintall Beurce: Macknvie Dasis, Water and wastmater engineering, 5k Edtion; 25t9, o MoCeaw-Hat 4. Orenkelthosine Bares Guatlis abd Nom dashe rates (Cheese frees eptian 1 er 2 ) 5. Mixing and Flocculation Requirements Static mixer FIGUNE 016 Typical static miver pressure drop selection graph for pipe dianeters from 150mm to 700inm. Source: Mackenzie Davis, Water and wastewater engineering, 5nh Edition, 2019, @ McGraw-Hill Mechanical Floceulator Sautex: Mackoneie Davit, Water and wantewaler engineting. 5 Edton, 2019, o MeGraw etit Thimary Stilime utation Tambs 7. Thmary tank aledpr
