Add to favorite
 
123
Subscribe to our Newsletters Subscribe to our Newsletters Get Daily Updates RSS


Energy from Wastes
November 5, 2008 23:38


Microbes, producing energy

Organic wastes can become a great energy source, renewable and ecologically friendly, for our country, Russian scientists say.

In order to produce energy from organic wastes there exists a widely spread technique – anaerobic microorganisms digest biomass and emit biogas, a mixture of methane (50-70%) and carbon dioxide (30-50%). In Russia such enterprises aren’t spread widely enough, however, materials for mentioned process are in plenty.

There are at least three sources for biogas production: wastes of the agricultural sector, sewage sludges and solid domestic wastes. Statistical data and calculations reveal 773 million tons of wastes, which domestic agricultural sector produces every year. Microbial transformation of this Everest of wastes can give 62.5 billion cubic meters of biogas, which is equivalent to 31 billion tons of gasoline or diesel fuel or 106 gigawatt/hour of electric energy. Thus, Russian agricultural sector can fully cover its energetic needs and, what is more, provide energy for rural population of Russia. Unfortunately, this enormous potential still remains a potential.

80 million cubic meters of sewage sludges, produced in Russia annually, can give 0.6 billion cubic meters of biogas – enough to meet energetic requirements of waste treatment facilities, which are quite energy consuming today.

 

 

 
In Russia solid domestic wastes, up to 40% of which are easily degraded organic substances, are taken to dumps. Such actions are banned in many countries of the European Union, because heaps of domestic wastes produce methane, a greenhouse gas. A reasonable approach to this problem is taking this process under control and preventing pollution of Earth’s atmosphere with methane and the ground – with wastes. 35 million tons of solid domestic wastes can produce 2.1 billion cubic meters of biogas and 2.3 million tons of high-quality fertilizers. Both products of microbial transformation can be successfully used in municipal economy, but first city dwellers should learn to sort wastes.

Traditional technique of methane production is not the only one means for releasing energy from biomass via anaerobic fermentation. Same principles work for microbial fuel cell. The simplest microbial fuel cell consists of two compartments, one with cathode and second with anode. Microorganisms of anode compartment oxidize organic matter, producing electrons and protons, which head for oxygen, located in the cathode compartment. However, compartments are separated with a membrane, which is transparent only for protons. Electrons have to move along the outer circuit, thus generating electric current. When electrons reach the cathode compartment, they react with oxygen and protons, thus forming water. Modern microbial fuel cells produce very small amount of energy, but they can soon turn from a toy into a real fuel cell. Fuel cells work on any organic matter, which can be decomposed by microorganisms.

Bioenergetics has wide perspectives in Russia, however, its successful realization requires united efforts of financial, intellectual and political sectors of our country.

Source: Russian Science News

Kizilova Anna


Tags: Russian Scientists ecology    

Next Previous

You might also find interesting:

Psoriasis and Atherosclerosis Anything in Common? Frost-Proof Ceramics Developed Russia Plans Two Manned Flights to the Moon Annually Nanotechnologists Fit High-Precision Blood Test into Strip Enzymes are Able to Purify Water









Comment on our site


RSS   twitter      submit



TAGS:
Arkhangelsk  Russian Film Directors  Exhibitions in Moscow  train tickets Russia FIFA  Moscow hotels  Viktor Fainberg  St. Petersburg  Russian mobile operators  Russian tourism  Alexander Perepilichny  Anton Denikin  Krasnodar  Sand Sculptures  Kemerovo Region  Russian musicians  Mercedes-Benz Fashion Week Russia  Russia composers  agriculture  Russian science  Aeroexpress  Kerry Ellis  Spacecrafts  Russian Composers  Nikolay Basov  Moscow  human rights activists  Mikhail Zadornov  Trankov  society  The State Hermitage Museum  Kazan Railway Station  Television  Russian scientists  Sherlock Holmes  VTB  Russian places of interest  eclipse  Andrey Zvyagintsev  Russian Cinema  Festivals in Saint Petersburg  Easter  Joseph Stalin  Russian business  Hoffmann  Tula  Jonathan Meese  Vostochny Spaceport  Russian economy  Russian companies  tour 


Travel Blogs
Top Traveling Sites