algae bloom Articles

  • Surface Water / Algae Blooms Case Study

    Challenge The city river in Berlin is contaminated to the point that fish death events are common. Combined sewage overflows, stormwater runoff and the high traffic of ships are the main sources of contamination. The high amount of nutrients and the high tempratures in the summer make the river prone to algae blooms. For these reasons, the shore of the river was selected as the first ...


    By akvola Technologies GmbH

  • Tackle harmful algal blooms with near-surface circulation

    Lake Varner in Newton County, Ga., about 35 miles east of Atlanta, has been plagued with harmful cyanobacteria (blue-green algae) blooms since the reservoir was built in 1992. At an average depth of 10 to 12 ft, the shallow lake water warms quickly in the spring, creating ideal breeding conditions for the blue-green algae blooms, which can contribute to taste and odor problems and be potentially ...


    By Medora Corporation

  • Aquarion – Reducing need for chemical treatments - Case Study

    The goal for utilizing ultrasound in the North Stamford, Putnam and Mianus reservoirs was to reduce the need for copper sulphate treatments to take care of a blue-green algae issue. Positive effective on delaying blue-green algae blooms Reduced chemical consumption Improved water quality ...

  • The role of aeration in water features

    In warm weather, the surface of your lovely water feature sucdenly develops a green, slimy mass which looks as if it may begin to pulsate, eave the water, and threaten the surrounding countryside, like the monstrous entity in some early Steve McQueen B movie Your instinct may be to use extreme measures - the chemical equivalent of calling in the National Guard for a tactical nuclear strike. ...


    By EP Aeration

  • In Memory Of Ken Hudnell

    We learned today that Dr. Ken Hudnell passed away,  a very sad event for Medora Corporation.   Ken was living in New Bern, North Carolina and spent the past two years fighting pancreatic cancer. Medora Corporation, the US, and the world lost a tireless researcher dedicated to improving health by reducing toxins caused by Harmful Algae Blooms (HABs, aka ...


    By Medora Corporation

  • Algae control in wastewater treatment plant

    Description One of the main challenges faced by Wastewater Treatment Plants (WWTPs) is the control of algae blooms. High algae concentrations create problems for process performance and increase operating expenditure for cleaning and maintenance activities. Results The LUS has shown to be a viable solution at controlling algae growth in the ...


    By LG Sonic

  • Water drones hunt down, combat toxic algae

    As air drones already exist, a new development has evolved in drone technology, a water-based drone to ensure fast and efficient algae control and treatment. Combating algae is known as a complicated process which requires accurate measurements. A European consortium would like to present the DRONIC project, which will change algae treatment into a new technology that can simplify and ...


    By LG Sonic

  • Algae Problems

    Almost everywhere where water is being stored, algae problems may occur. When water is stagnant, has a high temperature or a high concentration of Nitrates and Phosphates, an algae bloom might occur, which can cause several problems. Blue-green algae growth can cause a foul odour to the water, a layer of scum on the surface and even pose a health risk. Green algae may colour the water green, look ...


    By LG Sonic

  • Notable increases in nutrient concentrations in a shallow lake during seasonal ice growth

    Nutrients may be eliminated from ice when liquid water is freezing, resulting in enhanced concentrations in the unfrozen water. The nutrients diluted from the ice may contribute to accumulated concentrations in sediment during winter and an increased risk of algae blooms during the following spring and summer. The objective of this study was to evaluate the influence of ice cover on nitrogen ...


    By IWA Publishing

  • Cyanobacteria Control, 3.5 Acre Raw Water Reservoir - Case Study

    SolarBee circulation is proven to be an effective long term water quality solution eliminating the use of copper sulfate completely from this reservoir. Topics: raw water, cyanobacteria, blue-green algae, cyanotoxins, copper sulfate Reservoir Overview: Small 3.5 acres drinking water reservoir with a depth of 20 feet. Pre-Deployment ...


    By Medora Corporation

  • Economic impact of algae blooms

    How much does an algae bloom cost? What is the price of inaction? Algae and cyanobacteria blooms are issues of considerable concern for environmental agencies, drinking water companies, municipalities and people alike. The incidence of Harmful Algae Blooms (HAB), along with its adverse effects, have been increasing in recent years as a result of climate change, increased fertilizer runoffs into ...


    By LG Sonic

  • Modeling impacts of highly regulated inflow on thermal regime and water age in a shallow reservoir

    Thermal regime and transport of dissolved pollutants, strongly related to water quality and algae bloom in reservoirs, may be quantized by indicators of water temperature and water age, respectively, and these indicators are more spatially and temporally variant in shallow reservoirs. Here, a two-dimensional model was used for studying characteristics of the indicators in Douhe Reservoir, based ...


    By IWA Publishing

  • Thermal stratification - Destroyer of healthy pond and lake ecosystems

    IT is early spring in a small reservoir which supports an exclusive condominium and golf coursa development. At and near the surface of the pond, in the layer called th: epilimnion, microscopic plants and animals (phytoplarikt< in and zaoplankton) feed on each other and are fed on in turn by small fish and other animals. Wind and wave action at the surface causes oxygen from the air to be ...


    By EP Aeration

  • Tackle Harmful Algal Blooms With Near-Surface Circulation - Case study

    A Georgia county is winning the battle with blue-green algae (cyanobacteria) on its surface water supply through near-surface circulation. Circulators paid for themselves in three years, cut the need for chemicals, restored water quality and the natural food chain, and eliminated taste-and-odor issues for potable water customers. LAKE VARNER in Newton County, Ga., about 35 miles east of ...


    By Medora Corporation

  • Theme Park the Efteling - Case Study

    Reuse of effluent of a municipal wastewater treatment works Theme park the Efteling stopped using groundwater and now uses treated effluent from a municipal wastewater treatment works for replenishing their ponds and irrigating the adjacent golf course. A reliable quality and quantity of the reused water is secured by using ASTRASAND® continuous sand ...


    By Paques Technology B.V.

  • Water Pollution

    Water pollution is a major global problem that requires ongoing evaluation and revision of water resource policy at all levels (from international down to individual aquifers and wells). It has been suggested that it is the leading worldwide cause of deaths and diseases, and that it accounts for the deaths of more than 14,000 people daily. In addition to the acute problems of water pollution in ...


    By IWA Publishing

  • Using UV for Simultaneous Disinfection and Control of Unpleasant Tastes and Odors in Drinking Water

    Algae blooms in surface water sources often lead to off-tastes and odors in finished drinking water. Because public confidence in overall drinking water quality is closely related to aesthetic quality, there is increasing interest in solving taste and odor issues.  UV-oxidation, the combination of UV and hydrogen peroxide, offers the ability to treat taste and odor (T&O) while simultaneously ...

  • Can harmful algal blooms be predicted?

    Summer 2015, as the eighth month of the year approaches (August), we are starting to hear and read in the news about sudden algal blooms occurring in freshwater lakes and marine environments. Many popular beach resorts have put up warning signs proclaiming the water is unsafe for recreational purposes. This is an understandable precautionary measure since phytoplankton abundance or more ...


    By LG Sonic

  • Occurrence of phosphorus, iron, aluminum, silica, and calcium in a eutrophic lake during algae bloom sedimentation

    Phosphorus (P) in a water body is mainly controlled by the interaction between surface sediment and the overlying water column after the complete control of external pollution. Significant enhancement of P in a water body would cause eutrophication of lakes. Thus, a better understanding is needed of the occurrences of P between the sediment and water column in eutrophic lakes. Here, we ...


    By IWA Publishing

  • Algae control in an open balance tank - Case Study

    High algae concentrations create problems for process performance and increase operating expenditure for cleaning and maintenance activities. Several LG Sonic e-line devices were installed in a Wastewater Treatment Plant (WWTPs) in Melbourne, Australia in order to control algal blooms. The Challenge: Control Algal Blooms and Lower Maintenance Costs One of the main challenges ...


    By LG Sonic

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