Energy

Human Waste as an Energy Source

- Adam Clare

Human waste is a problem for every place humans live and throughout history it has been dealt with in various ways. Instead of treating human waste as a problem that needs to be removed from our towns we may want to think about it as an energy source. That’s right: turn our poo into electricity.

Anaerobic digestion of human waste can be done to convert the waste into gas. The UN University has successfully done this in Uganda and ready to take it elsewhere.

Biogas from human waste, safely obtained under controlled circumstances using innovative technologies, is a potential fuel source great enough in theory to generate electricity for up to 138 million households – the number of households in Indonesia, Brazil, and Ethiopia combined.

A report today from UN University’s Canadian-based Institute for Water, Environment and Health estimates that biogas potentially available from human waste worldwide would have a value of up to US$ 9.5 billion in natural gas equivalent.

And the residue, dried and charred, could produce 2 million tonnes of charcoal-equivalent fuel, curbing the destruction of trees.

Finally, experts say, the large energy value would prove small relative to that of the global health and environmental benefits that would accrue from the proper universal treatment of human waste.

“Rather than treating our waste as a major liability, with proper controls in place we can use it in several circumstances to build innovative and sustained financing for development while protecting health and improving our environment in the process,” according to the report, “Valuing Human Waste as an Energy Resource.”

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Europe Meets 2020 Emissions Targets Early

- Adam Clare 1 Comment

Europe has already beat its 2020 gas emissions target and it’s only 2015! This is good news because we need to reduce our energy consumption and our global output of greenhouse gas emissions. This demonstrates to the rest of the world that not only is it economically feasible to reduce emissions it proves that it can be done quicker than climate change deniers claim.

A report by the EU’s environment agency on Tuesday said 2014 emissions were 23 percent lower than in 1990. The EU’s goal is to achieve 20 percent reductions by 2020, but the report said the bloc is headed for 24-25 percent cuts with current measures to fight climate change.

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A Refrigerator That Doesn’t Need Energy

- Adam Clare

Refrigerators are a massive drain on our power grids because our modern world needs them to function. Without refrigeration our food networks wouldn’t be viable nor would we be able to stay cool indoors during heatwaves. Thanks to some very bright people we now have a fridge that won’t need energy to work.

The invention, dubbed WindChill, took first place in the student category in the Biomimicry Global Design Challenge, aimed at finding solutions borrowed from nature to improve the global food system.

“We thought it would be good to decrease the amount of food waste in the world, and we came up with this design because it’s easy to build and the materials are relatively cheap,” said team member Michelle Zhou.

The design borrows the burrowing and the fanning techniques employed by some animals, siphoning in air (think elephants ears) that is then cooled by tubes which partially run underground (think digging termites). This helps provide cheap, cold air for food refrigeration.

 

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Solar and Wind Continue to Succeed, Coal Keeps Failing

- Adam Clare

Coal continues its downward trend to obsolescence thanks to the rise of installed solar and wind capacity. In many places around the world coal is more expensive than renewable energy and as a result it has driven costs down elsewhere.

The future is clearly one that won’t use coal as an energy resource. We need to keep the carbon in the ground, and we’re slowly starting to leave coal alone.

For the first time, widespread adoption of renewables is effectively lowering the capacity factor for fossil fuels. That’s because once a solar or wind project is built, the marginal cost of the electricity it produces is pretty much zero—free electricity—while coal and gas plants require more fuel for every new watt produced. If you’re a power company with a choice, you choose the free stuff every time.
It’s a self-reinforcing cycle. As more renewables are installed, coal and natural gas plants are used less. As coal and gas are used less, the cost of using them to generate electricity goes up. As the cost of coal and gas power rises, more renewables will be installed.

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Sucking Diesel Fuel From Thin Air

- Adam Clare

We’ve polluted so much that there are now companies that think there is profit to be made by sucking CO2 from the air. How they make money is by reselling the CO2 to make carbonation for soft drinks, or strangely, to make diesel fuel.

What a world!

German company Sunfire produced its first batches of so-called e-diesel in April. Federal Minister of Education and Research, Johanna Wanka, put a few litres in her car, to celebrate.
And the Canadian company Carbon Engineering has just built a pilot plant to suck one to two tonnes of carbon dioxide from the air daily, turning it into 500 litres of diesel.

The process requires electricity, but if the start-ups use renewable electricity they can produce diesel that is carbon neutral.

In other words, burning it in your car only returns to the atmosphere the CO2 removed in the first place.

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