The study’s lead author, Bruce Logan, Hydrogen Energy Center and the project of the Pennsylvania State University Energy and director of the Institute for Environmental Studies, wastewater contains organic matter in the form of energy. Domestic wastewater containing the chemical 10 times the energy they need energy. Domestic wastewater plus the energy inherent in the wastewater generated by the livestock and food production is almost sufficient to maintain the operation of the nation’s water infrastructure.
The new method uses a technology that is a microbial fuel cell, can waste water in chemical energy into electricity and clean water can be used. MFC uses microorganisms to decomposition and oxidation of organic matter, this process will release the moving electrons to the anode. At the same time, the hydrogen ions in the water by proton exchange membrane into the cathode region of the independent. Be attracted by an electronic circuit from the anode to the cathode, resulting in a current. Hydrogen ions with the surrounding oxygen combine to form a clean water.
In order to obtain a higher energy density, the Logan team used a technology called reverse electrodialysis when the “helper”. RED technique, two different sources of water pump pressure through a pair of film, this film and the oppositely charged electrode connected to make positive and negative charges moving in different directions, when the ions towards their respective electrodes move , will generate electricity. However, this method requires a lot of film, and therefore high cost.
Logan team set both long and developed by the new system, called microbial reverse electrodialysis cell, the system consists of a membrane composed of several pairs of RED heap in an MFC, the cathode and the anode chamber between the proton exchange membraneis also located on MFC. Flow from the two systems are separate and operate independently, but together to improve the energy density: RED heap will increase the current of the MFC at the same time, the voltage between the MFC electrode enables RED heap less membrane operations .
This system can operate a key RED heap using ammonium bicarbonate instead of seawater. This will increase the energy density, ammonium bicarbonate regeneration in the pile, the heap to become a closed system. The new system has been proven to 3 watts per square meter, the maximum energy density. The new system per cubic meter of organic hydro electric energy 0.94 kwh, whereas the traditional method of wastewater treatment per cubic meter of water would consume about 1.2 kwh of electricity. Latest methods will not only allow us to get more energy, so that we can better and faster the purification of wastewater. “Logan said.