December 21, 2015

Energy

Putting the Pee into PC

A new form of recycling is about to hit Silicon Valley. The eco-friendly technology uses urine to power a computer. The technology is the next best thing to water power – it creates enough energy to send a wireless signal to a PC.

A team led by Professor Ioannis Ieropoulos of the Bristol BioEnergy Centre, created a self-sufficient system powered by a wearable energy generator based on microbial fuel cell (MFC) technology.

Ieropoulos is also popularising a “smart toilet”, which aims to help bring sanitation to off-grid areas.
He says the toilet that can power and recharge small electrical devices using urine as the power source and at the same time remove pathogens and clean the urine for sanitation purposes. The team is working towards a prototype that will be installed in Durban, South Africa for a bigger research trial. Eventually it is hoped that a smart toilet capable of generating power and removing pathogens from urine will go into manufacture.

their latest application of Pee power was achieved by embedding socks with MFCs that produced enough energy through the wearer’s footsteps to power a wireless transmitter that sends a signal to a PC.

Essentially, the gizmo uses the foot as a manual pump to drive wee (the fuel) around the system and, in turn, create a small current.

Ieropoulos explains why a device like this could be used for all manner of portable and wearable electronics.

Q: What is the Microbial Fuel Cell?

– It is a bio-electrochemical system, that has a capability to convert organic waste directly into useful electricity, and can therefore have a wider impact in terms of resource recovery in every day life.

Q: And you’ve created a wearable generator with this?

– Yes, we did it to demonstrate the potential of the technology in emergency situations, where a low-cost piece of kit, which forms part of an outfit or some outdoor gear, can start transmitting a distress signal with the survivor’s coordinates, after the user simply urinates inside the wearable system.

Q: How does it work?

– Inside MFCs exist microbial communities, which are electro-active and which ‘excrete’ electrons as part of their natural metabolism, when they are fed with organic waste ‘fuel’ such as urine. These microbes live on the surface of electrode materials and allow the excreted electrons form current.

Q: Using urine to make energy sounds a bit unpleasant…

– The use of any form of human by-product (solid excreta, saliva, perspiration) is naturally associated with unpleasantness and discomfort, and urine is no different. Using urine as the carbon-energy source for the microbial communities inside MFCs, implies collecting and handling urine, which is, of course, unpleasant. But this is precisely the work that needs to be done in the lab, in order to develop the technology to the point where the user can still utilize urine to generate useful electricity, but …

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Community

Why young people are moving to canals

The freedom and tranquil bliss of canal networks are attracting young people to take up a transient life on the water. With a comfortable, live-on-board narrowboats averaging between £20,000-£30,000, its clear life afloat is cost effective. And icanal haggerstont’s a global trend, everywhere from Silicon Valley to Northern Europe. Nowhere is it more true than the center of world finance, London, England.
A report from Swiss Bank UBS says London is “less affordable for locals who wanted to buy than any city except Hong Kong” https://www.theguardian.com/money/2015/oct/29/london-house-prices-most-overvalued-world-ubs. Foreign investment and enticing buy-to-let schemes have made it near impossible for young Londoners to even contemplate owning their own home in the future.
Walking along the Regent’s Canal between Haggerston and Islington, it is easy to see what attracts people onto the water. The life of houseboat residents is idyllic. Moorhens, swans and mallards drift alongside the porthole of your bedroom and as the sun sets on the bow of the boat, the bars and restaurants that line the canal are just outside your front door.
Its a sustainable life on the canals. Residents are well stocked up with firewood for their wood-burners and a stalwart part of the top deck is the 25kg bag of coal. Water buts for excess water are used as storage on most boats. The main supply of water is procured from pumping stations along the canal. Similarly, waste is disposed of at sewage stations. Many houseboat residents have large sacks of compost and soil in order to grow small vegetables and herbs on the roof of the boat. Whilst passing by one delightful canal boat one mile from Angel I was welcomed by the face of Jeremy Corbyn. The inhabitants of this particular boat had planted a Support Corbyn poster outside their vessel. There is a sense that the younger members of the canal community are a left leaning group who were seeking to define their own water based sub-culture. A warming sight whilst strolling along the towpath were two men, back from work, enjoying the evening on the water. They had speakers set out on deck, a crate of beers, and a PlayStation linked up in front of them proving you can still get hold of all the home comforts you desire.
I spoke to Daisy, a 27 year old Londoner who will be moving onto her houseboat in early February 2016. Having spent her early twenties moving from rented flats in east to west London and a brief stint in a woodland commune in Surrey, the housing crises in the capital caused her to consider narrowboat living. When she came into some inheritance, the first thing that came into her head was to buy a canal boat and with her boyfriend’s carpenter expertise they set about renovating there £30,000 boat over the course of a year. Solar panels are fixed onto the roof and will …

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