Petroleum is the feedstock for many products in the chemical industry. However, this fossil fuel is becoming increasingly scarce and expensive. Renewable raw materials are an alternative. But can the likes of bioethanol be obtained from sources other than foods such as sugar cane or cereals? The answer is yes.
Thanks to white industrial biotechnology, chemical substances can also be derived from waste products generated by the food industry, leftover biomass from agriculture and forestry, and residual materials. Researchers of the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB in Stuttgart are demonstrating how this biotechnical recycling works, using colza, whey and crab shells as examples.
When producing biodiesel from colza oil, raw glycerol is accrued as a byproduct. Scientists at the IGB have now developed a method of converting this raw glycerol into 1,3-propandiol – a chemical base for producing polyesters or wood paint. Until now, 1,3-propandiol has always been chemically synthesized, but it can also be derived from glycerol by certain micro-organisms. Clostridium diolis bacteria, for example, can produce a comparatively high yield of chemical feedstock. However, these bacteria cannot convert raw glycerol. This is because raw glycerol contains fatty acids left over from the colza oil, and these have to be separated out.
“Furthermore, high concentrations of both the glycerol substrate and the 1,3-propandiol product inhibit the growth of the bacteria,” says Dr. Wolfgang Krischke of the IGB, pointing out another challenge in developing this biotechnological process. “We have managed to solve this problem to a large extent by keeping the bioreactor in continuous operation, because once the glycerol has been almost fully converted, it loses its inhibiting effect. In this way, we have achieved a stable process with high product concentrations.” The fatty acids can be converted by yeasts to long chain dicarboxylic acids providing novel building blocks for polymer industries.
One of the byproducts obtained from the manufacture of dairy products is acid whey, which until now has always been disposed of at considerable cost. However, the milk sugar (lactose) contained in the whey can be converted into lactic acid (lactate) with the help of lactic acid bacteria. Lactate not only serves as a preservative agent and acidifier in food production, but can also be used as a feedstock in the chemical industry – for example in the production of polylactides, which are biodegradable polymers. Such polylactic acids are already being used to make disposable crockery and screws for surgical operations.
Further reports about: > 3-Propandiol > Biodiesel > Biomass > Clostridium diolis bacteria > IGB > Petroleum > bacteria > biotechnical recycling works > carbon is biomass > colza > colza oil > fatty acids > glycerol > glycerol substrate > industrial biotechnology > micro-organisms > raw > waste products
Researchers uncover protein-based “cancer signature”
05.12.2016 | Universität Basel
The Nagoya Protocol Creates Disadvantages for Many Countries when Applied to Microorganisms
05.12.2016 | Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH
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...
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...
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...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
05.12.2016 | Power and Electrical Engineering
05.12.2016 | Materials Sciences
05.12.2016 | Power and Electrical Engineering