Water Purification And Filtration

Water filtration removes impurities from water by means of a fine physical barrier, a chemical process or a biological process. Filters cleanse water to different extents for purposes such as providing agricultural irrigation, accessible drinking water and suitability for industrial purposes.

Blue Africa Environmental Solutions offers a tailor-made water treatment solutions to every client. Whether producing water for human consumption, recycling or treating water from industrial processes or for commercial processes, we can design, construct and supply a cost-optimised, highly effective and sustainable solution.

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Pre-Treatment Processes

Various methods exist for effective pre-treatment. The objective of pre-treatment is to remove contaminants from raw water that will affect the stability and performance of the main treatment process and to remove contaminants that will affect the performance of the main process. Filtration may be used in the treatment of industrial effluent, process water, municipal wastewater and drinking water. It is also used as a pretreatment step to membrane processes and desalination of seawater.

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Disinfection

Water disinfection means the removal, deactivation or killing of pathogenic micro-organisms.
Microorganisms are destroyed or deactivated, resulting in termination of growth and reproduction. Chemical inactivation of microbiological contamination in natural or untreated water is usually one of the final steps to reduce pathogenic microorganisms in drinking/process water. Combinations of water purification steps for example, oxidation, coagulation, settling, disinfection and filtration cause water to be safe after production.

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Reverse Osmosis (RO)

Reverse osmosis (RO) is a water purification technology that uses a semi-permeable membrane to remove ions, molecules, and larger particles from drinking water.

The largest and most important application of reverse osmosis is the separation of pure water from seawater and brackish waters. Seawater or brackish water is pressurised against one surface of the membrane, causing transport of salt-depleted water across the membrane and emergence of potable drinking water from the low-pressure side.

Desalination is a process that removes minerals from saline water. Salt Water is desalinated to produce water suitable for human consumption or irrigation. One byproduct of desalination is salt. Desalination is used on many seagoing ships and submarines. Most of the modern interest in desalination is focused on cost-effective provision of fresh water for human use.

Blue Africa Environmental Solutions specialises in the design, construction and installation of RO and Desalination systems. These units can vary from household to large industrial scale systems.

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Effluent Separation

Hydrocarbon contaminated effluent includes oils, greases, diesel, petrol, etc. that originate from wash bays, workshops, oil stores, parking areas or any other area that generate hydrocarbons.

Blue Africa Environmental Solutions is able to provide cost-effective hydrocarbon contaminated effluent separation technology which allows final effluent to be discharged into environment or easily recycled for reuse.

Blue Africa Environmental Solutions offers a range of gravity separation systems that specifically caters for hydrocarbon contaminated wastewater. The main aim in designing or proposing any separation system is that final effluent complies with regulatory requirements for wastewater discharge. The system separates from the effluent all pollutants, such as oils, greases and fat. The final discharge water can also undergo a polishing process and be re-used in the required operations.

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Biological Wastewater Treatment Process BWWTP

Blue Africa Environmental Solutions offers a complete range of biological wastewater treatment plants that treats wastewater to the required standard for release into the environment or for various non potable applications, e.g. irrigation. These bacteria, together with some protozoa and other microbes, are collectively referred to as activated sludge, which after being treated in an anaerobic followed by an aerobic process are returned to the anaerobic phase to eliminate sludge production and waste. The bacteria removes small organic carbon molecules by ‘digesting’ them. As a result, the bacteria grow and the wastewater is cleansed.

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Spill Kits Available

Blue Africa Environmental Solutions offers a range of spill kits designed for first response in case of a spillage. The complete range can be used on hydrocarbons, chemicals or combination kits.

  • Wheeled Bin Spill Kits – Hydrocarbon and Chemical
  • Vehicle and Truck Spill Kits – Hydrocarbon and Chemical
  • Laboratory Spill Kits
  • Biological Spill Kits
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Waste Recycling Equipment

At source, segregation is a cost-effective method of reducing waste disposal and segregation cost. Blue Africa Environmental Solutions offers a wide range of products to assist the client with onsite waste segregation and management of all the different kinds of waste stream. Various waste containers and recycling banks are offered to suit the client’s needs. The waste recycling banks are designed for optimised packing and to reduce transport cost.

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Pre-Treatment Methods

  • Manganese Dioxide: For the removal of iron magnesium and other heavy metals.
  • Water Softeners (Water Conditioner): For the removal of calcium.This method is usually applicable where heat elements are present such as boilers and geysers.
  • Carbon Filters: Used mainly for chlorine removal and other organic gases and to clear up the taste of water.
  • Sand Filters: Used mainly for the removal of sediment from water. Water disinfection means the removal, deactivation or killing of pathogenic microorganisms. Microorganisms are destroyed or deactivated, resulting in termination of growth and reproduction.
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Types of Disinfection

  • Chlorination: Chlorine is used almost universally in the treatment of public drinking water because of its killing power of harmful bacteria and other waterborne, disease causing organisms.
  • Ozone: Kills 99.9 percent of known harmful bacteria and is extremely effective. Ozone can be used in dirty and muddy water.
  • Ultra Violet: UV light has demonstrated efficacy against pathogenic organisms, including those responsible for cholera, polio, typhoid, hepatitis and other bacterial, viral and parasitic diseases.
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Reverse Osmosis Applications

  • Domestic Systems: Commonly used on improving water for drinking and cooking.
  • Portable Units: A self-contained water treatment plant that can provide potable water from nearly any water source.
  • Production of bottled mineral water: Complete reverse osmosis system including additional water treatment stages that use ultraviolet or ozone to prevent microbiological contamination.
  • Wastewater Purification: In the industry, reverse osmosis units are designed specially to remove minerals from boiler water at power plants to prevent corrosion.
  • Food Industry: In addition to desalination, reverse osmosis is a more economical operation for concentrating food liquids (such as fruit juices) than conventional heat-treatment processes. Its advantages include a lower operating cost and the ability to avoid heat-treatment processes, which makes it suitable for heat-sensitive substances such as the protein and enzymes found in most food products.
  • Boats, Yachts and Cruise Ships: A typical sailboat RO system consists of three major sections: the seawater supply and preliminary filtration, a high-pressure pump, and the RO membrane. Depending on the design of the system, either manual or electrically operated valves are used to control the flow of water through the system.
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Oil Water Separation (OWS)

Separators are gravity separation devices designed by using Stokes Law to define the rise velocity of oil droplets based on their density and size. The design of the separator is based on the specific gravity difference between the hydrocarbon and the waste water because the difference is much smaller than the specific gravity difference between the suspended solids and water. Oil water separators’ purpose is to recover hydrocarbons that have segregated from emulsion in an gravity wastewater separation plant. Separators is sized by the flow rate versus the separation chamber’s effective surface area (or projected surface area in the case of a and coalescing and or parallel plate type separator). Therefore, the effectiveness of any oil water separator is affected by the flow rate. The slower the flow, the better the results. The OWS unit can be gravity or pump fed.

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BWWTP Packages

  • Civil Constructed Plants: The civil constructed plants are designed and constructed mostly for large flow industrial and residential development applications.
  • Standard Flow Range: 10 Kl to 5 Ml per day (larger plants can be designed on request).
  • Completely civil constructed system.
  • HDPE Tanks: The HDPE tanks systems are the most cost effective BWWTP for medium flow applications. The plant is an above ground installation and therefore easily expanded on and maintained due to this fact. The plant can also be easily relocated if the need arises.
  • Standard Flow Range: 10 Kl to 400 Kl per day (larger plants can be designed on request). Minimal civil work is required, only a concrete slab is required for the plant to stand on.
  • Budget Plastic Tank Range: These plants are a very cost effective alternative solution to septic tanks and soakaways allowing the client to re-use final effluent. These plants are designed for small applications such as households, lodges, and small commercial and industrial applications.
  • Standard Flow Range: 600 l to 10 Kl per day. Plants are installed below or above ground.