Click here for more information about Algenuity
Click here for more information about LiqofluxPhenometrics Buy 3 Get 1 Free
Visit cricatalyst.com!Evodos Separation Technology

Technology

Why Hydrothermal Liquefaction hasn’t taken off yet

April 1, 2018
AlgaeIndustryMagazine.com

Hydrothermal liquefaction (HTL) of microalgae has rarely been commercialized. Click image to enlarge.

Wenguang Zhou writes in Sciencetrends.com about work recently published in the journal Bioresource Technology regarding why Hydrothermal Liquefaction (HTL) of microalgae — a bio-oil technology which does not require dewatering and drying of algal biomass — up to now, has rarely been commercialized.

One of the problems impeding its industrialization is the production of wastewater (the aqueous phase product) during HTL. More than 20% of the carbon and 50% of the algae is transformed to this wastewater. The cost for wastewater treatment by traditional methods would very high and the nutrients would be wasted.

Alternatively, this wastewater may be treated as a nutrients source for algae cultivation. During the last decade, researchers have been trying to make this possible. The wastewater may be used as carbon, nitrogen, phosphorus or even the sole nutrient source to sustain the normal algae culture. But it has to be diluted by a hundred times or even higher because the concentrations of nutrients are too high, and most importantly, the high concentrations of inhibitory substances such as phenolics, heavy metals, and cyclic nitrogenous compounds.

Inhibitory effects from these compounds may be alleviated by tuning the wastewater to a desirable level by adjusting HTL process parameters (e.g., changing reaction temperature), pre-treatment of wastewater to remove or reduce the inhibitory compounds, or balancing nutrients contents in wastewater. On the other hand, isolation and selection of robust algae species or species obtained from genetic engineering and metabolic evolution would be very effective to decrease the inhibitory effects.

Another promising way is to co-cultivate multiple algae species or cultivate algae with other microorganisms, such as bacteria and fungi. It could be more advantageous when the microorganisms could settle by itself because of bio-flocculation. Additionally, cultivation of multiple species (polyculture) can support the stable ecosystem of the wastewater treatment system because of enhanced biodiversity.

The work was conducted by Lijian Leng, Jun Li, Zhiyou Wen, and Wenguang Zhou from Nanchang University.

Read More

More Like This…

Copyright ©2010-2019 AlgaeIndustryMagazine.com. All rights reserved. Permission required to reprint this article in its entirety. Must include copyright statement and live hyperlinks. Contact editorial@algaeindustrymagazine.com. A.I.M. accepts unsolicited manuscripts for consideration, and takes no responsibility for the validity of claims made in submitted editorial.

twittertopbarlinks_eventstopbarlinks_requesttopbarlinks_archives

From The A.I.M. Archives

— Refresh Page for More Choices
The Algae Biomass Organization (ABO) reports the introduction of the Algae Agriculture Act of 2018 (H.R. 5373), a bill that would give algae cultivators and harvesters ma...
At the Technical University of Denmark (DTU), Science Nordic.com reports, researchers are investigating bioluminescent algae, to determine whether bioluminescent organism...
Global EcoPower (GEP), of Aix-en-Provence, France, has signed a 5-year partnership contract with the French Alternative Energies and Atomic Energy Commission (CEA). This ...
Judith Lewis Mernit writes in e360.yale.edu that an experiment being conducted by animal science professor Ermias Kebreab at the University of California, Davis, is testi...
Milenio.com reports that BiomiTech, a Mexican company, won a prestigious innovation award for its air purification system at the Contamination Expo Series 2018 held in Bi...
Cécile Barbière writes for Euractive.fr (translated by Rob Kirby) that, in large greenhouses formerly home to the tomatoes and cucumbers of the market gardening Groupe Ol...
Environmental Technology magazine notes that the difficulty in predicting how algae blooms will develop lies in their variform nature. With a multitude of different bloom...
E.A. Crunden writes in thinkprogress.org that Florida’s first gubernatorial debate was dominated by environmental and climate issues, with an emphasis on the state’s alga...
Julianna Photopoulos writes in Horizon EU Research and Innovation magazine that UK start-up Skipping Rocks Lab aims to use natural materials extracted from plants and sea...
AlgaEnergy, a Spanish biotechnology company specializing in the production and commercial applications of microalgae, and Yokogawa Electric Corporation, a leading provide...
Steve Fountain writes in fortstocktonpioneer.com that, amid the 800-page law that last month set the country’s farm policy through 2023, is the expansion of federal suppo...
Jessica D'Lima writes in AdvancedScienceNews.com that medicine is moving towards minimally invasive procedures, which have important patient-oriented benefits such as sho...