I have to do a presentation for biology on 'recycling & treatment of water'

I am having difficulty with what information is important.

The presentation is only supposed to last 2-3 minutes (which is part of the difficulty as I only have a short amount of time)

Any tips/advice
Any suggestions for what to choose to say
Any help at all - Thanks!

Important issues:

The treated water has to be quality water, ready to drink.
The sewage has to have trace amounts removed: heavy metals, biological, etc.
The sewage treatment plant has to operate 24/7, otherwise, a disaster for folks using the sewage system.
Treatment has to be environmentally friendly (ie, no chems added that make the water not treatable downstream)
Finally, certain things that cannot be treated have to be banned (ie the Shampoo with Lindane (Broken Link Removed) from sale

For recycling, you can also look at greywater recycling, for example:

http://en.wikipedia.org/wiki/Greywater
although it is only a developing resource in the Western world.

if you are smart enough, you should know that there are a a lot of facts on google or wikipedia

When preparing a short presentation on the recycling and treatment of water, it's important to focus on key points and present them concisely. Here are some tips and suggestions to help you:

1. Introduction: Start with a brief introduction to capture the audience's attention. You can provide a statistic or a statement about the importance of water recycling and treatment.

2. Importance of Water Recycling: Explain why water recycling is crucial. Highlight the growing global water crisis, rising water scarcity, and the need to conserve and efficiently use water resources.

3. Water Treatment Processes: Select two or three key processes to discuss in the presentation. Some important methods include:
- Filtration: Explain how different filtration techniques (e.g., sand, activated carbon, membrane) remove impurities and contaminants from water.
- Coagulation and Flocculation: Mention how chemicals are added to water to form larger particles, allowing easier removal during treatment.
- Disinfection: Discuss the use of methods such as chlorination, ultraviolet (UV) light, or ozonation to eliminate harmful pathogens.

4. Benefits of Water Recycling: Emphasize the advantages of water recycling, including:
- Conserving natural water sources: Explain how recycling water reduces reliance on freshwater supplies.
- Environmental benefits: Discuss how recycling helps protect ecosystems, minimizes pollution, and saves energy.
- Sustainable agriculture and industry: Mention how recycled water can be used for irrigation, industrial processes, and other non-potable purposes.

5. Case Studies or Examples: Share a short story or example of successful water recycling and treatment projects. This will help illustrate the real-world impact and application of these practices.

6. Conclusion: Summarize the main points and reinforce the importance of water recycling and treatment. You can end with a call to action, urging the audience to actively contribute to water conservation efforts in their daily lives.

Remember to keep your presentation concise and use visual aids, such as images or diagrams, to enhance understanding. Practice beforehand to ensure you can comfortably deliver the content within the time limit. Good luck with your presentation!