Process for treating organic wastewater and apparatus for...

Details Process for treating organic wastewater and apparatus for... Process for treating organic wastewater and apparatus for...

2005-04-26

2005-04-26

Prince, Fred G. (Department: 1724)

Liquid purification or separation

Processes

Treatment by living organism

C210S198100, C210S205000

Reexamination Certificate

active

06884355

ABSTRACT:
A process for treating organic wastewater which comprises treating organic wastewater with ozone and successively with alkali and introducing said alkali treated organic wastewater into an anaerobic digestion tank for anaerobic digestion. Instead of the ozone and successive alkali treatments, ozone treatment in the presence of hydrogen peroxide or ozone treatment under UV radiation is applicable. Prior to introduction into the anaerobic digestion tank, the treated wastewater may be separated into solids and phosphorus is preferably recovered from the solution. Solubilization of solids in the organic wastewater and transformation of organic substances into methane are greatly enhanced and sludge to be disposed is greatly reduced. Moreover, phosphorus is efficiently eluted out and recovered from solids in the organic wastewater.

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Jardin et al., “Refixation of phosphates released during Bio-P sludge handling as struvite or aluminium phosphate”,Environmental Technology, 2001, pp. 1253-1262, vol. 22, Germany.

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