Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Reexamination Certificate
2005-07-05
2005-07-05
Lawrence, Frank M. (Department: 1724)
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
C210S759000, C210S760000, C210S908000
Reexamination Certificate
active
06913698
ABSTRACT:
Techniques for treating waste water by adding a valent ion, such as CaO/CaCO3, which depends on the pH value of the waste water, to reduce the chemical oxygen demand (COD) are provided. Organic acid intermediates formed from the oxidization of organics with ozone will chelate with valent ions dissolved in water and precipitate from the waste water, so as to reduce the amount of ozone consumed and save cost. The method of the present invention is preferably conducted by adjusting the pH value of the reaction and/or adding hydrogen peroxide.
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Lawrence Frank M.
Scully Scott Murphy & Presser
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