Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Methanization on the farm - Integrating nitrogen treatment

06.11.2008
In Rennes, studies are being conducted to combine livestock liquid manure methanization processes with a biological nitrogen removal process. The expected benefits are measured in terms of energy savings and preservation of river water quality.

The July 2006 increase in the price of electricity repurchase has given a boost to biogas production through methanization. This will delight farmers in western France (Brittany, the Loire Country, and Lower Normandy) who produce more than 50% of the country’s livestock manure.

However, in the zones where livestock raising is the most intensive, the priority goes to removing organic nitrogen to limit water pollution. Yet anaerobic digestion to produce methane does not affect the stocks of nitrogenous matter responsible for the eutrophication of the aquatic environment.

An ambitious project

In Rennes, within the DIGESTAERO* project, a PhD dissertation is being conducted in collaboration with Breton industry leaders to combine the processes of methanization and biological nitrogen removal by nitrification and denitrification. These processes already exist in the food processing industry (distilleries, fabrication of dairy products), but they are not used in the manure treatment context. Indeed, to limit installation costs, the digesters should be able to be integrated into biological nitrogen removal units that already exist on the farm.

Moreover, the treatment unit should take into account inputs that vary substantially in terms of type and composition. For example, an effluent’s rate of biodegradable material varies from 30% to 40%.

- Equip livestock breeders in 2009

First, an experimental pilot made up of two 100-liter tanks was developed to study the phenomena involved and then optimize the processes. At the same time, a numeric model was designed first to identify the important parameters and then to define the optimal industry for the process. Today, the tool provides a good response to the variations in the liquid effluent composition. A first industrial prototype should come out in 2009 so that it can be adjusted to full-size operation. This will be the last step before the industrial development of this new process.

- Methanization: gains at all levels

With 300 million tons per year of animal manure from livestock breeding, France has one of the greatest potentials of agricultural biogas production in Europe. For example, the digestion of 1 m3 of pig liquid manure produces approximately 25 kWh as electricity and as much as heat. Since July 2006, each kilowatt is bought back up to 0.14 euros, instead of the 0.05 euros paid initially. These gains are also important for the environment since methanization can reduce greenhouse gas emissions from a livestock operation. Finally, odors are also reduced with manure management.

- Note this on your schedule:

«What development model for the methanization of livestock effluents is needed in France?" This is the theme of the conference organized in Rennes by the Cemagref, INRA, the University of Southern Brittany, Valétec, and Odipure, to be held on 21 November 2008. The debate will center around the results of the DIGESTAERO project .

* DIGESTAERO, a project financed by the ANR, associates the Cemagref, the Narbonne INRA, the University of Southern Brittany, and two Breton industries: Valétec and Odipure.

Marie Signoret | alfa
Further information:
http://www.cemagref.fr
http://www.cemagref.fr/Informations/Presse/InfMediaEV/im87/im87_rech2_anglais.htm

More articles from Agricultural and Forestry Science:

nachricht Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University

nachricht New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>