American Envirocare, Inc.

Envirem

Mikhail Kofman

Mark Y Kigel

Tamara V Vyshkina

Salvador A Riggi

Tamara V Vishkina

Mikhail Faylond

Gerard N Pica

Krum Cyril Wekilsky

Peter J Diglio

A method and apparatus for treating contaminated water are described wherein contaminated natural water or industrial wastewater is treated to remove contaminants in a packaged modular treatment unit.

Method and apparatus for treating contaminated water

A method for treating heavy metal contaminated soils, particularly those containing hexavalent chromium, which includes a first soil washing at pH 9-12 with an anionic synthetic organic flocculant followed by a liquid-solid phase separation such as by gravity separation including sedimentation, an optional second soil sludge washing at pH 2.5-3.0 with addition of a metal valency reducing agent which when done is followed by a second liquid-solid phase separation using a cationic synthetic organic flocculant, combining the first and second stage liquids and optional treating the liquid phase with a metal valency reduction agent such as sodium metabisulfite under acidic conditions followed by treatment with an alkaline agent to form insoluble metal hydroxide which is separated in a phase separation process and is combined with the final sludge, recycling the liquid from washing stage or stages for use in soil processing, dewatering the separated sludge or sludges using a separation method (e.g. pressure filtration, centrifuge, etc.) and treating the dewatered sludge with an alkaline reagent, such as dry lime dust, lime slurry, potassium or sodium hydroxide thus resulting in metal immobilization within the treated soil in the hydroxide form.

Method for treating soil contaminated with heavy metals

A coagulating and flocculating agent based on aluminum pentahydroxychloride for purifying and treating water and/or waste water and/or sludge and/or other contaminated liquids as well as to separate suspended and colloidal particles from liquids in industrial manufacturing processes has its activity enhanced with an inorganic or organic flocculation enhancing additive such as natural or synthetic zeolite and/or cationic, anionic and non-ionic powdered, emulsified or liquid polyacrylamide. Aluminum pentahydroxychloride is formed by treating a natural nepheline, aluminum powder, aluminum oxide or other aluminum providing material with hydrochloric acid after which it is mixed with the flocculation enhancing additive.

Coagulating and flocculating agent and method for making it

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New York, NY, United States of America

Mikhail Kofman