algae sampling Articles | Environmental XPRT

Sorption of heavy metals in the biomass of alga <italic>Palmaria palmata</italic>

Sorption of heavy metals in the biomass of alga Palmaria palmata

Sorption of heavy metals by the sea alga Palmaria palmata was investigated in laboratory conditions. The sorption process of the analytes was carried out with constant flow of the solutions through the algae samples. The Langmuir isotherm model was used to describe equilibria. The experiments confirmed that 50 min of exposure of algae with little heavy metal contamination in contaminated waters ...

Oct. 18, 2013

By IWA Publishing

Algae Enumeration and Identification

Algae Enumeration and Identification Algae are ubiquitous in virtually all aquatic environments and are important bioindicators of water quality. They are frequently used to assess and monitor the health of aquatic systems. On the other hand, they are also responsible for imparting undesirable flavors to potable water supplies and pose potential health threats, particularly during algal blooms. ...

Oct. 1, 2012

By Analytical Services, Inc

Comparison in growth, lipid accumulation, and nutrient removal capacities of <italic>Chlorella</italic> sp. in secondary effluents under sterile and non-sterile conditions

Comparison in growth, lipid accumulation, and nutrient removal capacities of Chlorella sp. in secondary effluents under sterile and non-sterile conditions

The growth, lipid accumulation and nutrient removal characteristics of an oleaginous microalga Chlorella sp. HQ in two types of secondary effluents (named as X and Q) before/after sterilization were evaluated. The results show that the algal growth rates under sterilization were higher than those under non-sterilization. However, sterilization caused a significant decrease in algal lipid and ...

Feb. 19, 2014

By IWA Publishing

Effects of electrolysis stress on the growth of Microcystis aeruginosa

As a result of electrolysis, biomass was controlled to some extent and the protein content per gram wet algae decreased. The viability of the algae was measured by the flow cytometry. Without taking into account the consumption of substrate, Microcystis aeruginosa growth kinetics was demonstrated that the electrolysis would inhibit the algal growth. At the same time, photosynthetic efficiency ...

May 14, 2009

By Inderscience Publishers

Diatoms as bioindicators of pollution in the Mantaro River, Central Andes, Peru

Semi-quantitative analysis of two algal samples from the Mantaro River taken few kilometres downstream from La Oroya city at Junin, Peru, contained both organic-pollution tolerant and morphologically abnormal diatom associations. The organic pollution is inferred by elevated percentages of Nitzschia palea, Gomphonema parvulum and the Achnanthidium minutissimum complex; the total assemblage ...

Jun. 6, 2008

By Inderscience Publishers

Test organisms behaviour on municipal and industrial wastewater quality assessment

Industrial wastewaters quality became a target for the environmental toxicity assessment nowadays. When there are issues with complex effluents for which many chemicals cannot be quantified and/or interactive effects are likely to be significant, the use of bioassays with different test species becomes a more reliable way in the assessment of toxicity. Ecotoxicity evaluation of the several ...

Jul. 7, 2011

By Microbiotests Inc.

PCR amplification and DNA sequence of mcyA gene: The distribution profile of a toxigenic Microcystis aeruginosa in the Hartbeespoort Dam, South Africa

Using new polymerase chain reaction (PCR) primers, a once known to be under-transcribed microcystin synthetase A (mcyA) gene from the only known toxigenic cyanobacterium Microcystis aeruginosa dominating the Hartbeespoort Dam was consistently amplified from genomic DNA extracted from a set of algal and cell free water samples collected across this dam. In addition to this, five more mcy genes ...

Aug. 28, 2013

By IWA Publishing

Laboratory algal bioassays using PAM fluorometry: Effects of test conditions on the determination of herbicide and field sample toxicity

Pulse Amplitude Modulation (PAM) fluorometry, based on chlorophyll a fluorescence, is a frequently used technique in algal bioassays to assess toxicity of single compounds or complex field samples. It is known that several test conditions can influence the test results and since a standardized test protocol is currently lacking, it is difficult to link the results of different studies. ...

Jan. 29, 2014

By John Wiley & Sons, Ltd.

Two cyanobacterial strains can be distinguished from each other and other eukaryotic algae by spectral absorption method

Spectral absorption method based on two step linear regression analyses (TSLR) was applied for detection of two strains of cyanobacterium, Microcystis (blue-green algae) from eukaryotic algae. Both blue-green algae, algae and dissolved organic carbon (DOC) were considered from freshwater bodies in Kanto region, Japan. The results show that blue-green species can be detected from other algal ...

Mar. 1, 2011

By IWA Publishing

All clear in lake Twiste

Danger over for swimmers: what appears to be disgusting, is purely natural – algae Lake Twiste is clean and free of blue-green algae even if at the moment there is a large amount of filamentous algae present. However, this is not a problem and completely natural, Andreas Gründel, Environmental Engineer from the Hessen State Authority for the Environment and Geology explained. A bather ...

Jan. 1, 2009

By bbe Moldaenke GmbH

Characterizing the properties of dissolved organic matter isolated by XAD and C-18 solid phase extraction and ultrafiltration

The properties of aquatic dissolved organic matter (DOM) isolated by solid phase extraction (SPE) C-18 cartridges, ultrafiltration, and XAD chromatography are compared. Samples taken from the Suwannee River, Georgia, USA and McDonalds Branch in the Pine Barrens, New Jersey, USA were chosen to represent waters where DOM originates from predominantly terrestrially-derived (allochthonous) ...

Mar. 1, 2005

By Springer-Verlag GmbH

Comparison of the Conventional Algal Assay and the Algaltoxkit FTM Microbiotest for Toxicity Evaluation of Sediment Pore Waters

Abstract : Conventional algal tests have not been utilized to their full potential for routine toxicity assessments. This is mainly due to the complexicity of these assays and the fact that many operators are still encountering practical difficulties. In view of the need for a cost-effective alternative to standard algal assays for routine testing, a new culture/maintanance free algal test was ...

Jan. 7, 2020

By Microbiotests Inc.

Phosphate release from waste stabilisation pond sludge: significance and fate of polyphosphate

Net phosphorus removal from waste stabilisation pond (WSP) systems is governed by the rate of phosphorus incorporation into the sludge layer and the rate of phosphorus release from this sludge back to the overlying wastewater. Luxury uptake of phosphorus by microalgae has been shown to occur under WSP conditions in the laboratory; however, the significance of this mechanism and the fate of ...

Jan. 1, 2011

By IWA Publishing

Safety corner - Ergonomic considerations for the wastewater treatment plant

If you have ever had your golf swing assessed or changed the height on your desk chair, you have had an ergonomic experience. Ergonomics is an assessment of work spaces to reduce physical injury produced by repetitive job requirements. Ergonomics considerations cross every work type, from golf pros to lab technicians. Review of body mechanics while performing a job, with options of change to ...

Dec. 1, 2009

By GillTrading.com, Inc.

Spray drying of microalgae biomass for biofuel production

BUCHI Mini Spray Dryer B-290: Yield and total yield determination in spray dried microalgaes Recently, microalgal biomass has been recognized as a promising alternative source of raw material for biofuel production. Algal biomass has several advantages that may help to meet the need for the global demand of transport fuels, such as rapid growth rate, high lipid content, small land usage, and ...

Oct. 5, 2016

By BÜCHI Labortechnik AG

Heavy metals, PAHs and toxicity in stormwater wet detention ponds

Concentrations of 6 different heavy metals and total polycyclic aromatic hydrocarbons (PAHs) were determined in stormwater runoff and in the pond water of two Danish wet detention ponds. The pond water samples were analyzed for toxic effects, using the algae Selenastrum capricornutum as a test organism. Stormwater and pond water from a catchment with light industry showed high levels of heavy ...

Jan. 1, 2011

By IWA Publishing

Control and monitor Algae in a Lake - Case Study

As part of the Clearwater PMPC project, 2 MPC Buoys were deployed in the Skrzyneckie Małe Lake to test the performance of this unique technology. The Challenge: Control and Monitor Toxic Algal Blooms The ClearWaterPMPC project was initiated by LG Sound and funded by "Research for SMEs" within the EU 7th Framework Programme. The goal of the ClearWaterPMPC (Predicting, Monitoring,Preventing, ...

Jul. 2, 2016

By LG Sonic

Finding the needle in the hay stack - tracing seabed gas seepages using hullborne multibeam echo sounder, and AUV based sonar and optical systems case study

Scientific objective A better understanding of the shallow geological systems in the Barents Sea with particular attention to fluid flow Specific objectives Identify regional spatial distribution of gas flares within an area of 3000 km2 in the Barents Sea Identify and describe associated structures (i.e. pockmarks, carbonate reefs) using geomorphology Document associated structures with ...

Feb. 1, 2013

By Franatech GmbH

Rosebud Pilot Project - Case Study

Symbiotic Algae Cultivation System - Pilot Launch 2018 The Hamlet of Rosebud currently discharges 9,460 m3 of effluent from their 60 residences into a 30 year old septic field which is now failing. Symbiotic Envirotek Inc., in partnership with Wheatland County and the residents of Rosebud, intend to implement an Algae Cultivation BiofieldTM (ACS) that will replace the septic field and ...

Aug. 2, 2018

By Symbiotic EnviroTek Inc

Reliable Water Quality Data and Ingenuity Mitigate Algal Bloom Threat at Korean Dam

Overview South Korean firm K-water worked with a regional distributor to install a contained and protected sampling system used to continuously monitor for hazardous algal blooms at one of the country’s largest dams. Challenge As the organization responsible for operating South Korea’s integrated water management system, K-water oversees an entire water supply chain, from source ...

Jul. 22, 2020

By In-Situ, Inc.