ENVE 420 Industrial Pollution Control INTRODUCTION Dr Aslhan
- Slides: 14
ENVE 420 Industrial Pollution Control INTRODUCTION Dr. Aslıhan Kerç
Industrial Pollution Solid and Hazardous Wastes Air Pollution Water Pollution Interrelations between pollution types in an industrial system.
Raw Material Energy Industrial System Wastes Reuse Products By-products Recycle Real Wastes hazardous Solid Gas Liquid Radioactive
• Production one or more materials are used • Process: includes all the unit operations to obtain products • Sub-processes: not directly related with production. Includes supply of energy, preperation of materials • Inputs into an industrial sys: ? Material + energy • Outputs: ? Products + By-products + wastes • Waste: ? If the outputs from an industry do not have economic value they are considered as wastes.
Pollution Management in an Industry • Examination of the industry as a whole with all major and sub-processes • Aim: minimize waste production If necessary change the process
Process types • Continuous process • Batch process • Semi-batch process (e. g. raw material continuous, production not)
• Operation of the industry should be known on daily, weekly and seasonal basis # shifts / day Workdays / week Is there production in weekends? Is there any seasonal changes within the year?
Material and Energy Balance
Flowrates • Variations in waste flows depending on the diversity of the products manufactured and on process operations. • Process operations - Batch - Continuous Industrial surveys are conducted to determine waste loadings and variations.
Units used in industrial pollution • Volume • Load • Concentration
Expression of Flows / Volume • Time basis m 3/h, m 3/day • Production basis m 3/product m 3/raw material m 3/energy used
Expression of Load • Time basis kg BOD 5 /h, kg BOD 5 /day • Production basis Textile: kg BOD 5 / ton cloth Sloughter house. Meat processing ind. : kg SS / kg live weight kill Metal plating: kg Cadmium / m 2 plated area
Expression of Concentration • Mass mg/L • Volume m. L /L • Percentage mass % kg/m 3 L/m 3 volume %
Population Equivalent • Pollution loads of an industry can be expressed in terms of people equivalent. • Characteristics of domestic wastewater are taken as the reference for the conversion L water consumption/ capita-day Pollution load / capita-day
