algae harvesting process Articles

  • Clarification of algae-laden water using electrochemical processes

    Algae contamination of surface water and drinking water supplies is a significant problem particularly in rural areas. A decentralized inexpensive technology that would effectively remove algae from water would be beneficial. Electrocoagulation (EC) combined with electroflotation (EF) as a single process (ECF) is a promising algae harvesting technique with no moving parts that may be powered ...


    By IWA Publishing

  • Harvesting of Microalgae

    In commercial algae production harvesting is generally done by centrifugation. However, the costs and energy demands for harvesting the algal biomass by these methods are high. In the technical and economical analysis on microalgae for biofuels it was shown that the investment costs for the centrifuges contributed up to 34% of the total investment on equipment. The study also showed that the ...


    By Poly Glu USA

  • Granular activated algae for wastewater treatment

    The study used activated algae granules for low-strength wastewater treatment in sequential batch mode. Each treatment cycle was conducted within 24 h in a bioreactor exposed to 235 μmol/m2/s light intensity. Wastewater treatment was performed mostly in aerobic conditions, oxygen being provided by microalgae. High removal efficiency of chemical oxygen demand (COD) was achieved ...


    By IWA Publishing

  • Evaluation of initial collision-attachment efficiency between carbon dioxide bubbles and algae particles for separation and harvesting

    Microalgae have been regarded as a pollutant causing algal blooms in lakes or reservoirs but have recently been considered as a useful source of biomass to produce biofuel or feed for livestock. For the algae particle separation process, carbon dioxide (CO2), one of the main greenhouse gases, is dissolved into a body of water rather than being emitted into atmosphere. This study aims at ...


    By IWA Publishing

  • Simple Quantitative Measurement of Nannochloropsis Micro Algae in Water Using Shimadzu UV Micro Algae Analysis System

    Global warming due to the burning of fossil fuels is now widely recognized as a problem, and among the alternatives to fossil fuels, the extraction of fuel from micro algae has been actively investigated in recent years. While the yield per unit area of micro algae is high, and harvesting is possible year round, these advantages are offset by many challenges in the development process that ...

  • DOE Announces $15 Million In Funding For Algae-Based Biofuels And Bioproducts Research Projects

    On July 14, 2016, the U.S. Department of Energy (DOE), announced $15 million in funding for three projects that will work to improve algal biomass yields to reduce production costs of algae-based biofuels and bioproducts. The projects include Global Algae Innovations (San Diego, ...


    By Bergeson & Campbell, P.C.

  • Flotation of algae for water reuse and biomass production: role of zeta potential and surfactant to separate algal particles

    The effect of chemical coagulation and biological auto-flocculation relative to zeta potential was examined to compare flotation and sedimentation separation processes for algae harvesting. Experiments revealed that microalgae separation is related to auto-flocculation of Anabaena spp. and requires chemical coagulation for the whole period of microalgae cultivation. In addition, microalgae ...


    By IWA Publishing

  • Grana-Localized Proteins, RIQ1 and RIQ2, Affect the Organization of Light-Harvesting Complex II and Grana Stacking in Arabidopsis

    Abstract Grana are stacked thylakoid membrane structures in land plants that contain photosystem II (PSII) and light-harvesting complex II proteins (LHCIIs). We isolated two Arabidopsis mutants, reduced induction of non-photochemical quenching (riq1 and riq2), in which stacking of grana was enhanced. The curvature thylakoid 1a curt1a) mutant was previously shown to lack grana structure. ...


    By H Smith Plastics LTD

  • Algal biofuels from wastewater treatment high rate algal ponds

    This paper examines the potential of algae biofuel production in conjunction with wastewater treatment. Current technology for algal wastewater treatment uses facultative ponds, however, these ponds have low productivity (∼10 tonnes/ha.y), are not amenable to cultivating single algal species, require chemical flocculation or other expensive processes for algal harvest, and do not provide ...


    By IWA Publishing

  • Microalgae growth for nutrient recovery from sludge liquor and production of renewable bioenergy

    Proof-of-concept has been demonstrated for a process that will utilize nutrients from sludge liquor, natural light, and CO2 from biogas to grow microalgae at wastewater treatment plants. This process will reduce the impact of returning side-streams to the head of the plant. The produced algae will be fed to anaerobic digesters for increased biogas production. Dewatering of anaerobically digested ...


    By IWA Publishing

  • How is biodiesel produced?

    This article is the first in a series that will take a close look at alternative fuels production and source materials. Over the next several months, we will cover natural gas, propane, ethanol, hydrogen, and fuel cells. This month, we will focus on biodiesel. Methods for creating fuels from renewable biomass feedstocks have been used since the 1800s. Vegetable oils were used in diesel engines ...

  • Microalgae as a sustainable alternative for wastewater treatment

    Thanks to the threats posed to human health and the environment, and the economic costs of its treatment, wastewater from domestic, industrial and agricultural processes has been considered a serious problem for a long time. However, a paradigm shift in the past few years has led to a new concept of wastewater, not as a problem but as a source of energy and other precious resources, including ...


    By IWA Publishing

  • Is Occupy Wall St. Occupying the Wrong Street?

    My Dad and I have a running joke when we’re in the car together. “Look,” he’ll say. “Gas is cheap. It’s down to $3.39.” Cheap, he means, compared with the month before when it was $3.79 per gallon. The joke illustrates a good point. A few years ago we were flabbergasted by gasoline prices that exceeded $3 per gallon. Now we’re really happy when it ...


    By Energy Efficiency Markets

  • Zero Waste System in Paradise

    Most visitors to Fiji come for rest and relaxation on the white sand beaches or for diving and snorkeling among the unspoiled coral reefs. Few visitors realize that this tropical island in the South Pacific, north of New Zealand, is on the cutting edge of industrial ecology with a fully functional, zero waste program located near the Fijian capital of Suva. As part of an EPA funded review of ...


    By BioCycle Magazine

  • Monitoring greenhouse gases from biofuel crops

    Global issues such as climate change and energy security have driven rapid growth in renewable energy production - wind, solar, tidal, geothermal, hydro, biofuels etc. However, logically, each of these methods should deliver a net benefit in terms of greenhouse gas (GHG) reduction, so researchers in the United States have employed portable FTIR analysers to study the GHG emissions of biomass ...


    By Gasmet Technologies Oy

  • Development of a Bioaccumulation Model For Herbicides in Ulva and Clams

    Coastal lagoons are shallow water ecosystems characterised by high biodiversity and primary and secondary production, and with an elevated number of different habitats. These habitats have a key role as nursery and rest areas for a great number of marine species and birds. During the last decades these ecosystems have been exposed tomany anthropogenic pressures (urban, domestic, agricultural ...


  • PONGAMIA BIODIESEL 2030:Projecting a Path for Permanent Progress & Prosperity

    pongamia biodiesel 2030 Projecting a Path for Permanent Progress & Prosperity A Working Paper On Pongamia Biodiesel For 2030 “Earth provides enough to satisfy every man’s need, but not every man’s greed”- Mahatma Ghandi.   Ground-breaking Indian ...


    By Advanced Biofuel Center

  • Toxicological and Environmental Safety Data - Case Study

    Introduction AGRAGEL is a cross-linked copolymer of acrylic acid and acrylamide partially neutralized as potassium/ ammonium salt. The polymer is in its dry form a granulate and forms a gel-like material upon addition of water or aqueous solutions. Due to the cross-linking it is insoluble in water. Uptake of water is facilitated mainly by the negative carboxylic groups of the polymer and ...

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