Turning Human Waste into Plastic

One of the unsung heroes and villains of modern life is human waste, or poo as we like to call it. It is like death and taxes in that well known phrase about certainty, there is an awful lot of it around, and it is full or carbon.

A few years ago there was uproar when we discovered that farmers were using human waste to make their plants grow faster, a practice that like many of life’s more unsavoury issues has remained largely out of the public gaze for years. But what do we do with all of this waste? We can just pump it out into the sea, or dump it in landfill sites as is common in the USA, although these don’t really seem like great solutions to me. Good news is on the horizon though, a company in California has started to use it to make plastic, taking some out of the dumping category and making use of the carbon.

Admittedly we have the old gag reflex again. A plate of carrots grown with the aid of human waste to go with your minced beef with horse trace pie with a plastic bottle made out of human sewage full of fresh, crystal clear mountain water to wash it all down. But just think about the potential.

Waste Not.

Make Use of Human Waste

Plastic can be produced using human waste, bottles can be made from it, and it is biodegradable, so why not? This BBC video tells the story of an experimental bio-plastics lab called Micromidas, where this process is being experimented and researched, and where human waste is already being turned into plastic.

The process involves making a kind of nutrient soup from the waste to which bacteria is added. They produce something called PHA, a type of polyester. They feed on the waste and take up the carbon and turn it into this form of plastic. Then the plastic containing parts are separated and cleaned.

The material is then dried, the plastic extracted and made into pellets. It can then be used to make practically anything that we currently make using fossil fuel based plastic. There is after all no shortage of raw materials, so proponents hope to replace the old fossil fuel production with the new.

The process is very much in experimental stage, but the researchers hope to be able to produce on mass within the next 2 to 3 years, bringing the price down so that it can compete in a global market. Good for everyone, and the environment.

Just as a slightly less obnoxious adjunct I would like to add that Micromidas are also setting up a lab that is working on turning cardboard into Paraxylene, a chemical once more used to make plastic bottles, again in the hope of getting into and cutting out the fossil fuel market (usually Paraxylene comes from oil). Read this report about their work.

Using White Space for Internet Coverage

Google launched an interesting experiment this week, offering free “super” wi-fi connection to the Internet for several schools in Cape Town South Africa. What is interesting about that you might ask? Well they are using the unused frequencies in the broadcast TV spectrum.

White Space diagram

A diagram of a white space network

The TV broadcasting frequency spectrum is currently divided between many channels, but between each channel there is a gap, a frequency space, often known as “white space’, and the hope is that this space can be used to broadcast high speed wireless Internet access. This experimental system is not without it doubters though, TV companies are not keen because they think there might be interference in their picture, so what better than a small experiment to try it out?

We can all imagine how this experiment might revolutionize Internet use though. In the countryside where infrastructure is lacking but TV is visible the companies could offer a service. In the city where cables are all in use they could do the same. One great advantage is that low frequency signals can travel over long distances, so the coverage potential is massive, and they penetrate buildings and other natural barriers much more efficiently than other frequencies currently in use.

Here in the US many telecommunications carriers have been complaining that there is not enough bandwidth for them to keep up with consumer demand, and so the Federal Communications Commission has been trying to free up spectrum space. They approved rules in 2010 about the use of such white spaces and databases have been set up to monitor spectrum use to see how it can be improved. Google are one of the leaders in this database organization too, as this article explains.

Experiments are being conducted here too, with this article describing how the system is being used in a small North Carolina town, and results reported in the UK claim that the system can deliver 16 megabits per second over 10KM (see Christopher’s comments on this related article for an explanation of what that means), but this is a delivery similar to what we know as 4G.

Potentially great improvements in coverage might be just round the corner through a more efficient use of an already existing infrastructure.

Governments using Spyare, but for What?

Last week the New York Times ran an article about some investigative work conducted by a researcher and student in the Toronto and Berkley universities. The two were investigating government use of surveillance software, and seem to have discovered evidence that many governments are using off the shelf software to spy on their own citizens.

And we are not talking about despot regimes here, the list of 25 countries includes Australia, Britain, Canada and the US. The chosen mode of dissemination is typical of virus or spyware spreading techniques, an email is sent to whoever is to be monitored, once opened the software is downloaded into the computer.

In Vietnam the system has been found running on Android phones, so I would say if they can do it in Vietnam they can do it elsewhere.

You are under survelliance poster

You are Under Surveillance

The alarm bells ring if you look at who is being targeted. In some cases political dissidents (as is the case in Ethiopia) receive the emails. Another worrying factor is where the spyware is sent from (IP addresses registered to Turkmenistan’s Ministry for Communication in one case).

The company manufacturing the program is British, and they state that they sell their product to governments to help them crack down on terrorism and organized crime, but the possibilities for abuse are obvious and also demonstrated.

One problem is that the sale of surveillance is largely unregulated. Commercially available software can remotely turn your webcam on and watch what you are doing, record Skype conversations, email exchanges, log keystrokes and look at images inside the machine, practically anything you would like to see you can. Useful maybe in a crime investigation, but a powerful tool in the wrong hands.

If you would like to ponder the matter of ethics in technological development and marketing more, I recently interviewed Chris Howard, CEO of online publisher LIBBOO. They have devised and patented a system of measuring how much influence an individual has upon a group, and which stimuli create and use that influence. In the interview I asked him about the responsibility he holds when his invention gets into the wrong hands, and you can read his response here on the Bassetti Foundation website.

I also have another post about other spyware and monitoring systems that are freely available on the Internet here, although they are toys in comparison to the system described above.

I have deliberately omitted all names above, but the New York Times article contains them all.