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Water Treatment Practice N3
N. Taylor · e-book
R225.75 incl. VAT
Printed copy: R334.95 incl. VAT.
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About this book
The NATED N3 textbook for Water Treatment Practice. By N. Taylor, published by Hybrid Learning Solutions.
- Level: N3
- ISBN (e-book): 978-1-928392-25-5
- ISBN (print): 978-1-928203-65-0
- Pages: 250
What the book covers
The topics in this book include:
- Module 1: Application of the SI; Elementary calculations; Formulae; Different units of volume measurement in water industry; Graphs; Concentrations.
- Module 2: Water and other liquids; Flow velocity versus flow rate; Hydrostatic pressure; Flow in pipes; Flow in channels; The syphon; Flow measurement and metering.
- Module 3: Driving force and power; Pump types and uses; Operation of pumps; Selection of pumps.
- Module 4: What is a valve?; Types of valves; Operation, maintenance, safety regulations and precautions; Records.
- Module 5: General chemistry; Organic and inorganic compounds; Cations and anions occurring in water; Oxidation and reduction; Dissociation, ionisation, H+, OH-, Acids, Bases and pH; Alkalinity and buffer capacity; Concentration of chemical reagents, mole versus normality; Adsorption.
- Module 6: Microorganisms; Types of micro organisms; Aquatic plants; Pollution detection: Escherichia coli as pollution index; Nutrients.
- Module 7: Legislation; Provincial ordinances and local by-laws; Requirements for domestic water; Requirements for wastewater effluent.
- Module 8: Natural water sources; Types of water; Water sources.
- Module 9: Water quality; Purpose of water purification; Pollution of water sources: domestic and industrial; Impurities found in water; Terminology regarding impurities in water; Physical requirements; Chemical requirements; Toxic substances.
- Module 10: Pre-sedimentation: Removal of grit and sand; Removal of tastes and odours; Removal of algae; Removal of iron and manganese; Flow measurement.
- Module 11: Destabilisation of colloidal particles; The process; Excess lime process; Reasons for post-precipitation; Dosing equipment; Laboratory jar tests.
- Module 12: Principals of sedimentation; Common problems; Types of sedimentation tanks; Vertical flow sedimentation tank; Radial flow sedimentation tank; Calculations; Sludge draw-off; Control and records.
- Module 13: Slow sand filters; Rapid gravity sand filter; Pressures sand filters; Other types of filters; Operational problems; Bringing a new filter into operation; Care of sand filters.
- Module 14: Purpose and principles; Methods; Theory of chlorination and factors affecting it; Formation of chlorinated compounds producing tastes and odours; Use of chlorines in distribution systems; Properties of chlorine gas and hypochlorites; Storage, handling and changing of chlorine cylinders; Gas chlorinators.
- Module 15: Corrosion and anti-corrosion measures; Precautions against corrosion; Cathodic protection; Stabilisation of water; Maintenance; Sampling at various points for residual chlorine and bacteria; Shock disinfection after repairs.
- Module 16: Softening; Anion exchange for nitrate removal; Desalination; Fluoridation; Defluoridation.
- Module 17: Sources of wastes in water treatment; Dewatering; Water recovery; Chemical recovery.
- Module 18: Occupation health and safety act and regulations (OHASA); Hazardous chemicals and gases; Fire and explosion hazards; Colour coding for rapid identification; Elementary First Aid; Ablution facilities.