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PHOSPHORUS CONTROL FOR WASTE STREAMS FROM GLYPHOSATE MANUFACTURING PROCESSES

  • US 20200131067A1
  • Filed: 06/26/2018
  • Published: 04/30/2020
  • Est. Priority Date: 06/26/2017
  • Status: Active Grant
First Claim
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1. A process for recovery of phosphorus from a waste stream comprising one or more organic phosphorus compounds and phosphate (PO43−

  • ), wherein the one or more organic phosphorus compounds comprise N-(phosphonomethyl)glycine (glyphosate) and aminomethylphosphonic acid (AMPA), the process comprising;

    subjecting at least a portion of the waste stream comprising one or more organic phosphorus compounds and phosphate (PO43−

    ) to biological treatment to form a biologically treated waste stream;

    contacting the biologically treated waste stream with a precipitant, thereby forming within the biologically treated waste stream phosphate containing precipitates, wherein the biologically treated waste stream has a pH of less than 7 when initially contacted with the precipitant; and

    recovering a phosphate containing cake from the biologically treated waste stream, thereby forming a treated waste stream.

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