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
Globally, an increase in water pollution is pushing scientists and environmental care specialists to seek best ways of preserving and maintaining sources of safe drinking...
Cody Nelson writes for MPRNews.org that a team of University of Minnesota-Duluth researchers wanted to know how shortening winters — and less ice cover on lakes — might i...
Israeli-based Algatechnologies, Ltd. (Algatech) has become the major shareholder in Supreme Health New Zealand, Ltd. (Supreme) to supply the rapidly growing markets in Ch...
Hayley Dunning writes from the Imperial College of London that a new discovery has changed our understanding of the basic mechanism of photosynthesis and should rewrite t...
Dartmouth scientists have created a more sustainable feed for aquaculture by using a marine microalga co-product as a feed ingredient. The study is the first of its kind ...
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...
The Swiss Algae Consortium Association (SWALG) was founded in May 2018 as a non-profit organization that serves as a platform for algae-related activities in Switzerland ...
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...
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...
Mazda U.K. has announced that they are currently involved in joint research projects and studies as part of an ongoing industry-academia-government collaboration to promo...
London-based architectural and urban design firm ecoLogicStudio www.ecologicstudio.com, led by Claudia Pasquero and Marco Poletto, has unveiled Photo.Synth.Etica, a large...