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1-4, Dioxane Destruction Process

The DDS will accept condensate from a dioxane stripping process used in conjunction with processing sulfated product paste. The dioxane-laden liquid is passed to one of two receiving tanks. Each tank will either hold incoming liquid or will be treating liquid that has ascended to levels to initiate a batch.

Once treated, the liquid will be transferred to receiving points that may include publicly owned treatment works (POTW) or ancillary onsite facilities.

Detailed System Description

The following paragraphs describe functional requirements of the equipment and processes that comprise the wastewater system. Automatic control of system equipment will be accomplished through use of a programmable logic controller (PLC).

Complete oxidation of 1,4-dioxane is described by the following general reaction:

(1) C4H8O2 + 10H2O2 => 4CO2 + 14H2O

Equation (1) suggests that 10 moles of hydrogen peroxide completely degrades 1 mole of 1,4-dioxane. The speed of this reaction is increased by addition of a catalyst for the oxidation reaction.

When the treatment vessel is sufficiently filled with collected wastewater, addition of reagents will commence to facilitate oxidation of the 1,4-dioxane, catalyze the reaction and adjust pH in accordance to required discharge limits. Once the incubation period is completed, the vessel will be automatically emptied of its contents by the effluent transfer pump. The duration of reagent addition is established during system commissioning and is supplemented by extensive bench tests completed at the Chemithon research facility. Adjustment of the wastewater pH is accomplished by addition of sodium hydroxide or sulfuric acid. Continuously measured levels of pH within the treatment vessel determine the volume of acid or caustic addition.

For More Information:

Hal Busick
Manager of Sales




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