American Air Liquide, Inc.

L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

Rovshan Mahmudov

Vasuhi Rasanayagam

Jan Mante

Siavash Isazadeh

Midhun Joy

Joerg Schwerdt

Sylvester Zuttah

Shu Fang

Yan Zeng

Disclosed are decoupled systems and methods for producing an oxidized liquid. The method comprises the steps of generating an ozone strong water in a mass transfer unit, mixing the ozone strong water with a process liquid in a mixing unit to form a homogeneous and gas-free mixture of the ozone strong water and the process liquid, forwarding the homogeneous and gas-free mixture to a reaction unit, and producing the oxidized liquid in the reaction unit. The method utilizes the acidic feed liquid to generate ozone dissolved in water having a higher concentration at a saturated or nearly saturated concentration compared to prior art processes at atmospheric pressure and neutral or alkaline pH.

Separation of ozone oxidation in liquid media into three unit operations for process optimization

Disclosed are methods for continuous production of ozone strong water, the methods comprising the steps of injecting an acidification agent into a pressurized feed water to maintain a pH value of the pressurized feed water below 7, diffusing a two-phase mixture of O-Ogas and recirculated water into a body of acidic pressurized water to dissolve ozone into the acidic pressurized water. The disclosed methods include simultaneously maintaining a start-up mode in an upper portion of the dissolution column that favors high efficiency of ozone mass transfer into the acidic pressurized water and a steady state mode in a lower portion of the dissolution column that favors a high concentration of dissolved ozone in the acidic pressurized water coexistent in the body of the acidic pressurized water, wherein an ozone concentration gradient is formed along a height of the body of the acidic pressurized water.

Methods for producing high-concentration of dissolved ozone in liquid media

Disclosed are systems for continuous production of ozone strong water, the systems comprising an injection device that injects an acidification agent into a pressurized feed liquid, a diffuser device that injects ozone into a body of the acidic pressurized feed water, and injection nozzles each controlled by a valve that adjust a flow rate of the ozone strong water discharged from a dissolution column to match a flow rate of the acidic pressurized feed water fed to the dissolution column, thereby maintaining a start-up mode in an upper portion of the dissolution column that favors a high efficiency of ozone mass transfer and a steady-state mode in a lower portion of the dissolution column that favors a high dissolved ozone concentration coexistent in the body of the acidic pressurized liquid, wherein a concentration gradient of dissolved ozone is formed along a height of the body of the acidic pressurized liquid.

Systems for producing high-concentration of dissolved ozone in liquid media

A method for recovery of aluminum hydroxide Al(OH)from an aluminum enriched water/wastewater treatment sludge is disclosed. The method includes the steps of: adding a hydrated lime slurry to the aluminum enriched water/wastewater treatment sludge to form an alkaline sludge; adding sodium carbonate NaCOto the alkaline sludge to form a NaCOtreated sludge; forming a first supernatant from the NaCOtreated sludge of step b) containing NaAl(OH); introducing COto the first supernatant to form a precipitate of Al(OH)and a second supernatant containing NaHCO; and recycling at least a portion of the NaHCOfrom the second supernatant back to the alkaline sludge of step a).

Aluminum hydroxide coagulant recovery from water/wastewater treatment sludge

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Newark, DE, United States of America

Rovshan Mahmudov