Liquid purification or separation – Processes – Treatment by living organism
Patent
1998-08-05
2000-01-11
Simmons, David A.
Liquid purification or separation
Processes
Treatment by living organism
210610, 210631, 241 2, C02F 300
Patent
active
060131837
ABSTRACT:
A process for liquefying microorganisms present in biosolids, such as waste activated sludge, generated by municipal or industrial wastewater treatment plants is disclosed. The process includes the step of passing a slurry of the sludge at a high pressure through a nozzle having a restricted flow area to cause liquefication of the microorganisms as they are discharged from the nozzle. The pressure drop across the nozzle preferably exceeds 5,000 psi. At least part of the liquefied microorganisms may be recirculated to the treatment facility to feed nutrients to the wastewater treatment process. Optionally, the liquefied microorganisms may be anaerobically converted to methane and carbon dioxide. For optimum results, the sludge is subjected to pH adjustment and/or maceration prior to being pumped through the high pressure nozzle.
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Dhaliwal Harpreet S.
Stephenson Robert J.
Paradigm Environmental Technologies Inc.
Prince Fred
Simmons David A.
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