Caltech technology combines wastewater treatment with fuel cell energy generation, for areas with underdeveloped infrastructure.
![](http://www.rsc.org/chemistryworld/sites/default/files/upload/c3ra46699j-ga_300.jpg)
The electrochemical system reduces the yellow colour of wastewater at the same time as producing hydrogen
Caltech technology combines wastewater treatment with fuel cell energy generation, for areas with underdeveloped infrastructure.
The electrochemical system reduces the yellow colour of wastewater at the same time as producing hydrogen