From waste to energy

Natango Amadhila, Westside High School
Tunohole Mungoba
There is a growing tendency for people to become more conscious of environmental conservation and to contribute by reducing, re-using and recycling their household waste.

One such “conservationist” is a Grade 7 learner at Westside High School, Franklin Coetzee.

Franklin recently took part in a recycling competition titled ‘My Trash, My Treasure’, organised by the municipality of Swakopmund.

He was awarded second prize for his interesting project, a mini-incinerator. This incinerator was built from easily accessible and recyclable household materials such as plastic lids, old spray tins, milk cartons and even metal screws.

With the help of his father, Paul Coetzee, Franklin managed to assemble his prize-winning project. This mini-incinerator burns organic waste (plant materials and certain animal products) and can even generate a small amount of electricity.

Larger versions of this kind of incinerator are called waste-to-energy plants. These power plants are important because they reduce the amount of waste ending up in landfills and can generate useful electrical energy. They can generate enough electricity to supply to households and small communities.

Although there are some concerns about waste-to-energy plants creating air pollution, they are relatively safe. These plants have a built-in anti-pollution device that causes the complex chemicals to be broken down into simpler and less harmful compounds.

The ash from the incinerator sometimes contains high concentrations of metals and other substances. The metal is removed and re-used and the remaining components can be used in building roads or making concrete stronger.

Considering Namibia has few power plants, here’s another reason why waste-to-energy plants might be good for us. In about 45 kg of typical trash, at least 36 kg can be burned as fuel to generate electricity at a power plant. Around 1000 kg of rubbish can generate 525 kWh of electricity daily, which is enough for 17 households. So not only would having waste-to-energy plants decrease the amount of waste in landfills, but they could also provide electricity for our communities.

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Namibian Sun 2024-03-29

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Katima Mulilo: 19° | 36° Rundu: 19° | 29° Eenhana: 19° | 29° Oshakati: 21° | 30° Ruacana: 20° | 33° Tsumeb: 19° | 29° Otjiwarongo: 16° | 29° Omaruru: 19° | 32° Windhoek: 17° | 29° Gobabis: 17° | 30° Henties Bay: 16° | 20° Wind speed: 22km/h, Wind direction: S, Low tide: 11:22, High tide: 05:24, Low Tide: 23:26, High tide: 17:46 Swakopmund: 16° | 17° Wind speed: 24km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:22, Low Tide: 23:24, High tide: 17:44 Walvis Bay: 16° | 22° Wind speed: 27km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:21, Low Tide: 23:24, High tide: 17:43 Rehoboth: 19° | 30° Mariental: 23° | 34° Keetmanshoop: 24° | 35° Aranos: 22° | 33° Lüderitz: 15° | 28° Ariamsvlei: 24° | 35° Oranjemund: 14° | 25° Luanda: 27° | 28° Gaborone: 20° | 32° Lubumbashi: 17° | 26° Mbabane: 16° | 21° Maseru: 11° | 29° Antananarivo: 16° | 27° Lilongwe: 17° | 27° Maputo: 20° | 28° Windhoek: 17° | 29° Cape Town: 17° | 28° Durban: 20° | 24° Johannesburg: 16° | 24° Dar es Salaam: 26° | 32° Lusaka: 20° | 30° Harare: 16° | 29° Currency: GBP to NAD 23.8 | EUR to NAD 20.37 | CNY to NAD 2.61 | USD to NAD 18.88 | DZD to NAD 0.14 | AOA to NAD 0.02 | BWP to NAD 1.33 | EGP to NAD 0.39 | KES to NAD 0.14 | NGN to NAD 0.01 | ZMW to NAD 0.74 | ZWL to NAD 0.04 | BRL to NAD 3.77 | RUB to NAD 0.2 | INR to NAD 0.23 | USD to DZD 133.85 | USD to AOA 832.63 | USD to BWP 13.71 | USD to EGP 47.35 | USD to KES 130.98 | USD to NGN 1303.34 | USD to ZAR 18.87 | USD to ZMW 25.01 | USD to ZWL 321 | Stock Exchange: JSE All Share Index 74536 Up +0.85% | Namibian Stock Exchange (NSX) Overall Index 1528.69 Up +0.84% | Casablanca Stock Exchange (CSE) MASI 12986.94 Up +0.04% | Egyptian Exchange (EGX) 30 Index 27559.35 Down -2.36% | Botswana Stock Exchange (BSE) DCI Same 0 | NSX: MTC 7.75 SAME | Anirep 8.99 SAME | Capricorn Investment group 17.34 SAME | FirstRand Namibia Ltd 49 DOWN 0.50% | Letshego Holdings (Namibia) Ltd 4.1 UP 2.50% | Namibia Asset Management Ltd 0.7 SAME | Namibia Breweries Ltd 31.49 UP 0.03% | Nictus Holdings - Nam 2.22 SAME | Oryx Properties Ltd 12.1 UP 1.70% | Paratus Namibia Holdings 11.99 SAME | SBN Holdings 8.45 SAME | Trustco Group Holdings Ltd 0.48 SAME | B2Gold Corporation 47.34 DOWN 1.50% | Local Index closed 677.62 UP 0.12% | Overall Index closed 1534.6 DOWN 0.05% | Osino Resources Corp 19.47 DOWN 2.41% | Commodities: Gold US$ 2 233.12/OZ UP +1.93% | Copper US$ 3.99/lb UP +0.12% | Zinc US$ 2 455.50/T UP 0% | Brent Crude Oil US$ 87.65/BBP UP +1.46% | Platinum US$ 908.62/OZ UP +1.53% Sport results: Weather: Katima Mulilo: 19° | 36° Rundu: 19° | 29° Eenhana: 19° | 29° Oshakati: 21° | 30° Ruacana: 20° | 33° Tsumeb: 19° | 29° Otjiwarongo: 16° | 29° Omaruru: 19° | 32° Windhoek: 17° | 29° Gobabis: 17° | 30° Henties Bay: 16° | 20° Wind speed: 22km/h, Wind direction: S, Low tide: 11:22, High tide: 05:24, Low Tide: 23:26, High tide: 17:46 Swakopmund: 16° | 17° Wind speed: 24km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:22, Low Tide: 23:24, High tide: 17:44 Walvis Bay: 16° | 22° Wind speed: 27km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:21, Low Tide: 23:24, High tide: 17:43 Rehoboth: 19° | 30° Mariental: 23° | 34° Keetmanshoop: 24° | 35° Aranos: 22° | 33° Lüderitz: 15° | 28° Ariamsvlei: 24° | 35° Oranjemund: 14° | 25° Luanda: 27° | 28° Gaborone: 20° | 32° Lubumbashi: 17° | 26° Mbabane: 16° | 21° Maseru: 11° | 29° Antananarivo: 16° | 27° Lilongwe: 17° | 27° Maputo: 20° | 28° Windhoek: 17° | 29° Cape Town: 17° | 28° Durban: 20° | 24° Johannesburg: 16° | 24° Dar es Salaam: 26° | 32° Lusaka: 20° | 30° Harare: 16° | 29° Economic Indicators: Currency: GBP to NAD 23.8 | EUR to NAD 20.37 | CNY to NAD 2.61 | USD to NAD 18.88 | DZD to NAD 0.14 | AOA to NAD 0.02 | BWP to NAD 1.33 | EGP to NAD 0.39 | KES to NAD 0.14 | NGN to NAD 0.01 | ZMW to NAD 0.74 | ZWL to NAD 0.04 | BRL to NAD 3.77 | RUB to NAD 0.2 | INR to NAD 0.23 | USD to DZD 133.85 | USD to AOA 832.63 | USD to BWP 13.71 | USD to EGP 47.35 | USD to KES 130.98 | USD to NGN 1303.34 | USD to ZAR 18.87 | USD to ZMW 25.01 | USD to ZWL 321 | Stock Exchange: JSE All Share Index 74536 Up +0.85% | Namibian Stock Exchange (NSX) Overall Index 1528.69 Up +0.84% | Casablanca Stock Exchange (CSE) MASI 12986.94 Up +0.04% | Egyptian Exchange (EGX) 30 Index 27559.35 Down -2.36% | Botswana Stock Exchange (BSE) DCI Same 0 | NSX: MTC 7.75 SAME | Anirep 8.99 SAME | Capricorn Investment group 17.34 SAME | FirstRand Namibia Ltd 49 DOWN 0.50% | Letshego Holdings (Namibia) Ltd 4.1 UP 2.50% | Namibia Asset Management Ltd 0.7 SAME | Namibia Breweries Ltd 31.49 UP 0.03% | Nictus Holdings - Nam 2.22 SAME | Oryx Properties Ltd 12.1 UP 1.70% | Paratus Namibia Holdings 11.99 SAME | SBN Holdings 8.45 SAME | Trustco Group Holdings Ltd 0.48 SAME | B2Gold Corporation 47.34 DOWN 1.50% | Local Index closed 677.62 UP 0.12% | Overall Index closed 1534.6 DOWN 0.05% | Osino Resources Corp 19.47 DOWN 2.41% | Commodities: Gold US$ 2 233.12/OZ UP +1.93% | Copper US$ 3.99/lb UP +0.12% | Zinc US$ 2 455.50/T UP 0% | Brent Crude Oil US$ 87.65/BBP UP +1.46% | Platinum US$ 908.62/OZ UP +1.53%