"Waste Disposal" Environment and Us PPT

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"Waste Disposal" Environment and Us PPT

Part One: Landfill Waste Simulation Experiment

For a long time, people have used the method of digging holes in the ground and filling them in landfills to dispose of garbage.

Let's experimentally investigate whether this method is safe and effective.

Put the washed fine pebbles about 3 cm thick into the jar, then add water so that the water is just halfway up the pebbles. Use tweezers to put a few balls of paper towels soaked in ink into the bottle near the wall, bury them with fine stones, and then slowly spray water on them. Observe the change in color and clarity of the water at the bottom of the bottle.

What phenomenon did we observe? What does it mean?

Phenomenon: The clear water at the bottom of the bottle turns black.

Explanation: When garbage is buried underground, harmful substances will leach out and contaminate groundwater.

If it were a real landfill, what harm would it bring to the surrounding environment?

Emit foul odor and pollute the air;

Breeds mosquitoes and flies, causing diseases;

Contaminate soil and affect agricultural production;

Garbage disposal PPT, Part 2: Properly designed landfills

How to solve the problem of landfills harming the surrounding environment? What methods can we think of?

Analyze what problems are solved in the design of each part of the new landfill?

Collect water that seeps into the garbage house from the ground and is contaminated by garbage for treatment

Monitor soil and groundwater conditions near garbage dumps at any time

Impermeable, separate the garbage house from the surrounding soil

Garbage disposal PPT, part 3: pros and cons of garbage incineration

Incineration is another way of disposing of garbage, which involves burning it in an incinerator.

Incineration has many advantages, such as occupying a small area, preventing waste from contaminating groundwater, and the heat generated can also be used to generate electricity!

There are also some problems with the incineration method. Not only will it consume a lot of electricity and leave residues, but if it is not properly controlled, it will also produce toxic substances and cause secondary pollution.

What are some more effective ways to solve the garbage problem?

Keywords: Free download of science PPT courseware for the second volume of the sixth grade in the textbook version, garbage disposal PPT download, environment and us PPT download, .PPT format;

For more information about the PPT courseware "The Environment and Our Garbage Disposal", please click the Environment and Our Garbage Disposal ppt tab.

"Garbage Disposal" Environment and Us PPT download:

"Waste Disposal" Environment and Us PPT Download Part One: Introduction of New Lessons In addition to the inevitable generation of household waste in daily life, factories, schools, hospitals, construction sites, etc. also produce a large amount of waste every day. ... ... ... Garbage place...

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Update Time: 2024-10-20

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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