The use of biological methods in water purification
• Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids and gases from contaminated water
Methods for purifying water Boiling Granular Activated Carbon filtering, Distillation Reverse osmosis Desalination The use of iron in removing arsenic from water • Biological • • •
What is biological treatment of water? • Biological treatment has been used in Europe since the early 1900 s • Biological water treatment involves the use of naturally occurring micro-organisms in the surface water to improve water quality
Why use biological treatment? • Biological water treatment processes are ideally suited to treat water that is highly colored and has high DOC and nutrient levels. • Biological treatment system effectively reduced DOC, turbidity and color in surface water supplies from dugouts, improving the quality of water used in homes.
How will biological treatment improve water quality? • Biological treatment improves water quality by reducing organic matter, DOC, color and turbidity.
Are there any limitations to using biological water treatment? • Biological treatment converts ammonium to nitrate • Biological treatment of water is not designed to reduce levels of inorganic matter • As with other water treatment systems, the treated water must be disinfected before the water is used for drinking and cooking.
Conclusion The biological treatment systems that were studied were effective multiple-barrier treatment systems for surface water supplies with high levels of organic matter. Biological treatment processes may prove to be valuable in treating surface water supplies for both individuals and communities.
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