• water treatment |company|history|chemicals |suppliers|long water®

    Water Treatment |Company|History|Chemicals |Suppliers|LONG WATER®

    Company Overview “LONG WATER®” is a professional supplier to provide chemicals and service for treatment of industrial waste water and drinking water , Urban sewage and other waste water.

  • what is the history of water treatment? - angel water

    What Is the History of Water Treatment? - Angel Water

    Water Treatment Is Reborn after Fading Away. Water treatment in the Middle Ages (500-1500 AD) became less sophisticated, as the Roman aqueducts fell into disrepair with the collapse of the Roman Empire. In these times, relatively little was done to ensure public access to a clean water supply.

  • history of water treatment

    History of water treatment

    The water treatment was based on slow sand filtration, and horse and cart distributed the water. Some three years later, the first water pipes were installed. The suggestion was made that every person should have access to safe drinking water, but it would take somewhat longer before this was actually brought to practice in most countries.

  • history of water treatment - advanced water solutions

    History of Water Treatment - Advanced Water Solutions

    Ancient Water Treatment Methods - The History of Water Treatment. As far back as 2000 BC, people had devised methods for water treatment. The earliest documented methods come from ancient Greek writings that suggested heating water by boiling it over fire and using the sun.

  • sewage | potable water treatment chemicals suppliers | long

    Sewage | Potable Water Treatment Chemicals Suppliers | LONG

    We provide high-effective chemicals for textile and dyeing waste water, color remove, COD & BOD remove

  • top 10 companies in water and wastewater treatment market

    Top 10 Companies in Water and Wastewater Treatment Market

    Here are the top 10 water and wastewater treatment companies – Suez Environment S.A. (France) Suez Environnement S.A. was founded in 2000 and is headquartered in Paris, France. The company provides water management, recycling and waste recovery, water treatment, and consulting services.

  • excel industries > company history > chemicals > company

    Excel Industries > Company History > Chemicals > Company

    In addition steps were taken to expand the capacity of water treatment chemicals at its Lote unit and to provide captive production of phosphorous trichloride for the same. - During April, the

  • chembond chemicals > company history > chemicals > company

    Chembond Chemicals > Company History > Chemicals > Company

    The products from the Water Treatment Chemicals division are exported to Thailand. Chembond's export turnover has increased from US$ 836 in 1990-91 to US$ 71,989 in 1993-94.

  • allgas technologies | about us | allgas technologies

    AllGas Technologies | About Us | AllGas Technologies

    ; Our commercial pool service and chemical supply division has been servicing customers throughout the tri-state region since 1932. Bulk liquid chlorine deliveries for commercial pools & water treatment facilities are our main customers. Click to learn more about our Wechsler Pool Supply Division.

  • elixir trading pvt. ltd. in delhi, delhi, india - company profile

    ELIXIR TRADING PVT. LTD. in Delhi, Delhi, India - Company Profile

    Established in 2005 , ELIXIR TRADING PVT. LTD. has made a name for itself in the list of top suppliers of Water Treatment Plants ,Water Softener & Purifier in India. The supplier company is located in Delhi, Delhi and is one of the leading sellers of listed products.

  • economies of scale and firm size optimum in rural water

    Economies of scale and firm size optimum in rural water

    The information on water suppliers' long‐run cost structure is therefore limited. Future research should focus on extending the data set to panel data by which then a multiproduct function, a quality index for considering the “depth” of production, economies of scope and even a possible separability of the individual stages of production