How to best load a dishwasher, by a chemical engineer (Day 243)

Loading a dishwasher is one of those daily household chores that usually doesn’t involve too much thought; you pack the dishwasher with dirty crockery, remember to use detergent and then press the on button.

But there is more to loading a dishwasher than meets the eye as chemical engineers at the University of Birmingham, UK, in collaboration with industry, have conducted research on how best to load a dishwasher.

Dishwasher in between PEPT cameras. Image courtesy of Chemical Engineering Journal
Dishwasher in between PEPT cameras. Image courtesy of Chemical Engineering Journal

Dr. Raul Pérez-Mohedano, who led the project, published the group’s findings in the article, Positron Emission Particle Tracking (PEPT) for the analysis of water motion in domestic dishwasherfor Elsevier’s Chemical Engineering Journal.

The technique of Positron Emission Particle Tracking, developed at the University of Birmingham, was used to track and analyse the flow of water in the dishwasher through non-invasive 3D spatial detection of radioactively labelled particles i.e. tracers.

Continue reading How to best load a dishwasher, by a chemical engineer (Day 243)

Leaching the value from waste (Day 236)

Hello everyone and welcome to today’s blog. Christmas is now over three weeks away, but before we leave the festivities behind for another year I just wanted to make an observation about waste during this indulgent celebration.

A few year’s ago I read a story in Engineering and Technology magazine which suggested the UK consumes around 10 million turkeys, 370 million mince pies, 25 million Christmas puddings, drink 250 million pints of beer and open 35 million bottles of wine.

However, according to WRAP (Waste and Resources Action Programme), the food and drink wasted in the UK increases by a massive 80 per cent over the Christmas period, with a staggering 230,000 tonnes of food, worth £275 million (US$400 million), is binned during the festive season.

The only good news about waste on this scale is that much of it can be used for the production of energy.

Biofuel plant
Biofuel plant

Chemical engineers have played a central role in the development of energy from waste processes including anaerobic digestion and biogas production.

Recent research shows that municipal solid waste (MSW) in China has increased and in 2010 exceeded 350 Mt (equivalent to 440 kg per person).

Continue reading Leaching the value from waste (Day 236)