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Clean Technology (PB386) Click to edit Master title style Numfon Eaktasang, Ph.D.
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Principle of Clean Technology
Cleaner Technology Reuse/Recycle Source Reduction Product Change Process Change Reuse Recycle Raw Material Change Technology Improvement Operational Management Before After
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Waste Reduction at Source
Final change or intermediate products change To reduce waste generation and environmental load Ecolabelling Product design Life cycle assessment (LCA) Product Change
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Waste Reduction at Source
Process Change Raw Material Change Technology Improvement Operational Management
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Waste Reduction at Source
Input material changes Material substitution Replace toxic chemical by non-toxic chemical Increasing material cost but saving in waste treatment and disposal cost Raw Material Change
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Waste Reduction at Source
Redesign production system, using automatic machine Quality checking/maintenance Improving chemical synthesis such using more selective catalyst to reduce by-product formation Improving process control Redesign or reconfiguring process to improve heat recovery Improving the selectivity of separation processes Technology Improvement
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Waste Reduction at Source
Good operating practice Preventing unnecessary releases and merges into on-site recycling Operational Management
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Reuse and Recycle On-site reuse Off-site reuse Material recovery
Energy recovery Recycle Waste New product
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Reuse and Recycle Energy recovery
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Process of Clean Technology
Planning and Organization Pre-Assessment Detail Assessment Feasibility Study Implementation and Evaluation
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Process of Clean Technology
CT working team Goal and objective setting 1. Planning and Organization
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Process of Clean Technology
Scope of the study Manufacturing process inspection Identify pollution sources Mass balance (input-process-output) Waste Evaluation Economic evaluation (cost-benefit analysis) Environmental impact assessment Priority setting 2. Pre-Assessment
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Process of Clean Technology
Identify source of pollution or energy loss Mass balance: energy balance, water balance, material balance Analysis and find the solutions Not effect on production process and quality of product Clean technology options 3. Detail Assessment
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Process of Clean Technology
Choose appropriate option Feasibility study in terms of 3Es (Engineering, Economic, Environment) 4. Feasibility Study
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Process of Clean Technology
Tool, equipment Experience Area Product Quality Safety Maintenance Interrupt the normal production process Engineering
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Process of Clean Technology
Investment cost Machine Under improvement/ stop production Maintenance Etc. Saving cost Material cost saving Energy cost saving Treatment cost saving By-product Etc. Economic
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Process of Clean Technology
Reduce environment impact Pollution prevention Waste reduction Environment
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Process of Clean Technology
To action must include a detailed work plan Target area, Timing and responsibilities Monitoring and evaluation to ensure that the practice is based on work plan If any there will be further revised. 5. Implementation and Evaluation
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Project Implementation
CT team Policy Goal Objective Technical team Data report & assessment Identified option Evaluation Next plan Supporting information Process information - Supervisor Process engineer Environmental engineer
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Sugar Production Process
Boiling and Evaporation Thickener Sugar crystal Dark brown sugar Sugar cane Sugar cane Juice Washing
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Boiling and evaporation
Mass Balance Sugar cane Sugar cane juice Thickener Boiling and evaporation Crystal Washing Dark brown sugar 100 tons Hot water 33 tons Calcium oxide 0.08 ton Flocculants 0.01 ton Bagasse 28 tons Steam tons Steam tons Filter cake 2.86 tons Molasses 8.86 tons 10.34 tons Hot water 0.19 tons Hot water 5.64 tons 105 tons tons 23.58 tons 19.01 tons 10.34 tons
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Mass Balance Material balance Energy balance Water balance
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Assignment 2 Study the manufacturing process of pulp and paper
Drawing production flow chart by using mass balance concept Deadline: 21th September 2017
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Thank You !
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