| http://www.w3.org/ns/prov#value | - The method of the invention comprises biologically treating the waste water, adding a coagulating agent, such as polyamine, to the waste water to coagulate the colored materials, adding a flocculating agent to increase the size of the coagulated particles, and mixing the flocculated materials with pressurized aerated water, such that the air is adsorbed by the materials, and the flocculating mater
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