Garbage generation is an inevitable part of human life. With rapid urbanisation, population growth, and increased consumption, the amount of waste produced has risen significantly. If not managed properly, garbage can lead to serious environmental and health problems. Therefore, effective waste management is essential for maintaining a clean and sustainable environment.
Garbage (Wastes)
Garbage is defined as items or materials that should be discarded because they no longer serve any purpose for us or are of no use to us. We consistently generate massive amounts of garbage. Some types of garbage, especially organic waste, may produce a strong odour, and a large amount of garbage may emit harmful fumes. As a result, we place such items in dustbins to be transported to distant locations to ensure that our environment remains clean and healthy. Garbage waste includes vegetable and fruit peels, extra prepared food items, waste paper, plastic materials, and a variety of other waste items.
Classification of Garbage (Wastes)
Garbage (waste) can be classified in different ways based on its nature, source, and ability to decompose. Understanding these classifications helps in proper waste management and disposal.
1. Biodegradable wastes
Biodegradable wastes are any organic matter that can be decomposed into simpler substances with the help of microbes. Biodegradable wastes can be broken down naturally, but improper handling can still cause environmental issues, including all organic wastes derived from plants, agricultural wastes, and so on.
2. Non-biodegradable wastes
Non-biodegradable wastes are wastes that cannot be decomposed and cause pollution in our environment. Some non-biodegradable wastes, such as plastics, metals, and glass, can be recycled.
Sources of Garbage
- Industrial wastes include those generated by power plants, chemical plants, concrete production lines, food preparation businesses, and textile industries, with each delivering waste specific to the industry of which it is a part.
- Domestic wastes include food remains, leafy food skins, apparel items, used plastic items, and so on, and are generated by family units, offices, and schools, among other places.
- Commercial: This specifies the type of waste generated by commercial activities such as disposable plastic cutlery, food items, food packaging, textiles, and so on.
- Agricultural waste includes waste generated by agricultural activities, such as husks, fertiliser bags, pesticide containers, crop residue, compost and pesticide containers, and so on.
Managing the Garbage We Produce
Waste management entails the safe and efficient disposal of waste as well as the transformation of waste into new products. As a result, waste management is the responsibility of both the government and the citizens. And when either of the two parties fails to do their part, the waste management system collapses. This will eventually result in a full-fledged garbage crisis. As a result, we will look at the waste management strategies that can be used.
1. Recycling
- Recycling is the process of treating and converting waste into new products that can be used as raw materials or for product packaging by manufacturers. Plastics, glass, and paper are some examples of recyclable waste. As a result, recycling lowers the cost and energy required to produce new products. It also reduces the amount of waste disposed of in landfills.
- Along with dumping and segregating waste, we must go a step further in reducing the amount of garbage we produce by applying the 3Rs principle - reduce, reuse, and recycle.
- Reduce: Consumption should be cut back. A product should only be used when it is necessary.
- Reuse: Instead of throwing away items like old newspapers and envelopes, consider reusing them.
- Recycle: Glass, paper, aluminium, and plastic can all be recycled and reused.
2. Composting
- Composting is the decomposition of organic waste into manure.
- Food and plant wastes are among the wastes that can be decomposed. As a result, they are appropriate for organic farming.
- Composting is the controlled decomposition of organic waste by microorganisms.
- This is one of the safest waste management methods, but it is a little slow.
3. Incineration
- 'Incineration' means 'to reduce to ashes.' Incineration is the process of burning a substance at a high temperature (greater than 1000°C) to produce ash.
- Incineration takes place in an incinerator. The Municipality of a City disposes of waste on a large scale by using incinerators.
- In the incinerator, solid waste is burned at high temperatures. All organic matter in waste is extracted as carbon dioxide, water vapour and ash.
- Household waste, chemical waste, and biological waste are all destroyed through incineration. Incineration significantly reduces waste volume. This is because when a large amount of waste material is burned, only a small amount of ash is left behind, which can be disposed of in a landfill.
4. Landfills
- The most common waste disposal strategy today is to dump waste in landfills. This strategy entails collecting all kinds of waste and compacting it before burying it beneath the ground.
- Landfills, on the other hand, will be located in a confined area far from civilisation. Furthermore, they are only appropriate for lands with deep groundwater levels. As a result, finding suitable landfill sites is becoming increasingly difficult.
- This strategy is based on the idea that biodegradable materials will decompose naturally. Furthermore, the gas emitted by landfills can be used as fuel.
5. Bioremediation
- Bioremediation is a biotechnological process that reduces or eliminates contamination. It is a waste management technique that employs organisms to remove or utilise pollutants from polluted areas.
- When it comes to executing the Bioremediation process, microorganisms such as Bacteria and Fungi play a key role. Bacteria are the most important microbes in this process because they convert waste into nutrients and organic matter.
- Even though this is an efficient waste management process, bioremediation cannot eliminate all contaminants. Bacteria can easily digest contaminants such as chlorinated pesticides and clean up oil spills, but microorganisms are incapable of destroying heavy metals such as lead and cadmium.
6. Plasma Gasification
- Plasma gasification is the process of converting waste to synthetic gas by subjecting it to high temperatures.
- An electrically powered plasma torch is used to vaporise organic matter into synthetic gases for this purpose (carbon monoxide and hydrogen).
- Slag is produced as a byproduct of this process.
7. Sewage treatment
- Sewage is the dirty drain water containing urine and faeces that is carried from our homes by underground pipes (called sewers).
- Sewage treatment generates clean water, which is discharged into the river. The organic matter in sewage is 'digested' in sewage treatment plant digesters to produce sewage gas (a type of biogas) and 'manure.'
- Untreated sewage that is dumped into a river can pollute the water. Sewage is thus disposed of by treating it at a sewage treatment plant (or sewage works).