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Can we use our waste to generate electricity and reduce our fuel bill?
Our Readers' Opinions
October 7, 2022

Can we use our waste to generate electricity and reduce our fuel bill?

EDITOR: Garbage is waste material or unwanted things that you throw away which come from homes, schools and businesses.

Special days are usually allocated for the collection of garbage. We would carry the garbage at a pickup point; the garbage truck would remove the garbage and carry it at the landfill.

At the landfill, the garbage is compacted and covered with soil and is left to decompose.

Have you ever thought that all this garbage can be turned into energy to generate electricity in our homes, school and businesses? Waste to energy or WTE is the process where energy (typically heat and electricity) is generated using waste as a fuel source. The process involves waste being dumped from garbage trucks into a large pit. A giant claw on a crane grabs waste and dumps it into a combustion chamber. The waste is burned, releasing heat. The heat turns water into steam in a boiler. The high pressure steam turns the blades of a turbine generator to produce electricity. An air pollution control system removes pollutants from the combustion gas before it is released through a smoke stack. Ash is collected from the boiler and the air pollution control system.

(https://www.youtube. com/watch?v=jsBkah-GLp7s) Most countries including St Vincent and the Grenadines get most of their electricity from oil. Oil prices usually fluctuate on the world market. For example if there is a war or a natural disaster it can cause oil prices to increase. According to a CNN news article, oil prices surged above $ 100 per barrel after Russia launched an invasion of Ukraine, piling pressure on a global economy already reeling from rampant infl ation (https://edition.cnn. com/2022/02/23/business/ brent-oil-ukraine-russia/ index.html) . As oil prices soar, it means electricity bills would increase which would cause households and businesses to dig deeper in their pockets to pay their electricity bill. Here are some advantages and disadvantages of waste to energy.

Advantages of waste to energy Reduces landfill waste-Converting waste to energy reduces the amount of waste entering landfills, mitigating greenhouse gas emissions such as methane. Methane, (a heat trapping gas that contributes to global warming is found at landfills). When the waste is decomposed at landfills, it releases methane. According to a United Nations article, human caused methane emissions can be reduced by up to 45% this decade. The article further states that such reductions would avoid nearly 0.3℃ of global warming by 2045 and would be consistent with keeping the Paris Climate Agreement’s goal to limit global temperature rise to 1.5℃ within reach.(

https://www.unep.org/newsand- stories/press-release/ global-assessment-urgentsteps-must-be-taken-reduce- methane) .

It generates power in the form of electricity or steam. It creates employment for the operation of the waste to energy plant.

It saves money on the importation of oil to generate electricity.

When oil is burned to generate electricity it releases carbon dioxide into the atmosphere which contributes to global warming and climate change. Waste to energy would reduce some of the carbon dioxide into the atmosphere that is released from oil when it is burned to generate electricity.

Disadvantages of Waste to energy: Incinerator plants need extensive flue gas treatment for them to meet environmental compliance regulations.

Waste to energy plants can be expensive to establish.

If the waste is not sorted before the incineration, recyclable materials can end up in the incinerator.

Produces harmful pollutants. However, if the flue gas is treated, it would reduce a lot of the pollutants. Flue gas is the gas that emanates from combustion plants which contains the reaction products of fuel and combustion air and residual substances such as particulate matter (dust, sulphur oxides, nitrogen oxides, etc.).

One man’s trash is another man’s treasure. Should we in St.Vincent and the Grenadines and the rest of the Caribbean explore the possibility of having a waste to energy plant to reduce the high cost of electricity? Could this be a game changer or not?

Kimani Wiseman

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