The role of algal organic matter in the separation of algae and cyanobacteria using the novel "Posi" - Dissolved air flotation process.

07:00 EST 23rd November 2017 | BioPortfolio

Summary of "The role of algal organic matter in the separation of algae and cyanobacteria using the novel "Posi" - Dissolved air flotation process."

Algae and cyanobacteria frequently require separation from liquid media in both water treatment and algae culturing for biotechnology applications. The effectiveness of cell separation using a novel dissolved air flotation process that incorporates positively charged bubbles (PosiDAF) has recently been of interest but has been shown to be dependent on the algae or cyanobacteria species tested. Previously, it was hypothesised that algal organic matter (AOM) could be impacting the separation efficiency. Hence, this study investigates the influence of AOM on cell separation using PosiDAF, in which bubbles are modified using a commercially available cationic polyelectrolyte poly(N, N-diallyl-N,N-dimethylammonium chloride) (PDADMAC). The separation of Chlorella vulgaris CS-42/7, Mychonastes homosphaera CS-556/01 and two strains of Microcystis aeruginosa (CS-564/01 and CS-555/1), all of which have similar cell morphology but different AOM character, was investigated. By testing the cell separation in the presence and absence of AOM, it was determined that AOM enhanced cell separation for all the strains but to different extents depending on the quantity and composition of carbohydrates and proteins in the AOM. By extracting AOM from the strain for which optimal separation was observed and adding it to the others, cell separation improved from <55% to >90%. This was attributed to elevated levels of acidic carbohydrates as well as glycoprotein-carbohydrate conjugations, which in turn were related to the nature and quantity of proteins and carbohydrates present in the AOM. Therefore, it was concluded that process optimisation requires an in-depth understanding of the AOM and its components. If culturing algae for biotechnology applications, this indicates that strain selection is not only important with respect to high value product content, but also for cell separation.


Journal Details

This article was published in the following journal.

Name: Water research
ISSN: 1879-2448
Pages: 20-30


DeepDyve research library

PubMed Articles [16898 Associated PubMed Articles listed on BioPortfolio]

Formation of regulated and unregulated disinfection byproducts during chlorination of algal organic matter extracted from freshwater and marine algae.

Seasonal algal blooms in freshwater and marine water can increase the input of algal organic matter (AOM) to the pool of dissolved organic matter. The impact of bromide (Br) and iodide (I) on the form...

Branched Poly(ethylene imine)s as Anti-algal and Anti-cyanobacterial Agents with Selective Flocculation Behavior to Cyanobacteria over Algae.

Poly(ethylene imine)s (PEIs) have been widely studied for biomedical applications, including antimicrobial agents against potential human pathogens. The interactions of branched PEIs (B-PEIs) with env...

Influence of parasitic chytrids on the quantity and quality of algal dissolved organic matter (AOM).

Algae-derived dissolved organic matter (AOM) is an important nutrient source for heterotrophic bacteria, while AOM such as humic substances pose significant challenges during water treatment processin...

Interactions between algal (AOM) and natural organic matter (NOM): Impacts on their photodegradation in surface waters.

The occurrence of algae bloom would lead to the release of algae-derived organic matter (AOM) and then alter the abundance and behavior of dissolved organic matter (DOM) in aquatic ecosystems. In this...

Influence of algal organic matter on MS2 bacteriophage inactivation by ultraviolet irradiation at 220 nm and 254 nm.

We determined the potential interference of extracellular algal organic matter (EAOM) and intracellular algal organic matter (IAOM) extracted from Microcystis aeruginosa on MS2 bacteriophage inactivat...

Clinical Trials [2400 Associated Clinical Trials listed on BioPortfolio]

ProAlgaZyme Novel Algae Infusion: Applications in Immunodeficiency

The purpose of this study is to determine the safety and effects in HIV patients of supplementation (4-20 fl. oz. daily) with ProAlgaZyme, a novel fermentation product of a freshwater alga...

ProAlgaZyme Novel Algae Infusion: Applications in Metabolic Syndrome

The purpose of this study is to compare the effects of supplementation with ProAlgaZyme (a novel fermentation product of a freshwater algae ecosystem) vs. placebo on Metabolic Syndrome an...

Hemodynamic Instability Prevented With Polaramine® Infusion Before Extracorporeal Circulation

This single-institution randomized controlled trial prospective will enrolled 48 patients scheduled for an aortic valve replacement. The objective of the present investigation is to determ...

Organic Diet Intervention in Primary School Children

The study aims to evaluate the hypothesized benefits of a systematic organic diet for children, over those of a conventional diet. The specific objectives of this study are to: i) Demonstr...

Safety and Efficacy of a Single Dose of a Polyphenol-enriched Brown Seaweed Powder in Human

The primary endpoint of this trial will be to evaluate the safety of a single administration in human of a dose of 500 mg of a polyphenol-rich algal powder when taken 30 minutes before a t...

Medical and Biotech [MESH] Definitions

An algal bloom where the algae produce powerful toxins that can kill fish, birds, and mammals, and ultimately cause illness in humans. The harmful bloom can also cause oxygen depletion in the water due to the death and decomposition of non-toxic algae species.

Algae of the division Rhodophyta, in which the red pigment (PHYCOERYTHRIN) predominates. However if this pigment is destroyed, the algae can appear purple, brown, green, or yellow. Two important substances found in the cell walls of red algae are AGAR and CARRAGEENAN. Red algae are thought to be closely related to the prokaryotic CYANOBACTERIA.

A phylum of oxygenic photosynthetic bacteria comprised of unicellular to multicellular bacteria possessing CHLOROPHYLL a and carrying out oxygenic PHOTOSYNTHESIS. Cyanobacteria are the only known organisms capable of fixing both CARBON DIOXIDE (in the presence of light) and NITROGEN. Cell morphology can include nitrogen-fixing heterocysts and/or resting cells called akinetes. Formerly called blue-green algae, cyanobacteria were traditionally treated as ALGAE.

Deoxyribonucleic acid that makes up the genetic material of ALGAE.

A non-taxonomic term for unicellular microscopic algae which are found in both freshwater and marine environments. Some authors consider DIATOMS; CYANOBACTERIA; HAPTOPHYTA; and DINOFLAGELLATES as part of microalgae, even though they are not algae.

Quick Search


DeepDyve research library

Relevant Topics

Antibodies Antisense Assays Biochips Bioinformatics Biological Therapy Biomarkers Biomaterials Bioscience Cell Culture Cloning Cytokine Diagnostics Dna Extraction Dna Sequencing Dna Transform...

Biotechnology - Biotech
"using living things to create products or to do tasks for humans" About Biotechnology - Biotech Biotechnology is the practice of using plants, animals and micro-organisms such as bacteria, as well as biological processes - such as the ripen...

Searches Linking to this Article