Patent ID: 7695621
Filing Date: 2010-04-13
Classification: C02F,Y02E,Y10S

Abstract:
1. A method of supporting denitrification, the method comprising: receiving biological material at a pulsed electric field station; applying a non-arcing pulsed electric field with pulses that have a pulse width of 2 to 15 microseconds, a peak field strength of 20 to 60 kV/cm and a frequency of 2000 to 10000 pps, to the biological material within a treatment zone in the pulsed electric field station to generate treated biological material; and transporting at least a portion of the treated biological material to an anoxic bioreactor in which denitrification is performed on a wastewater having a nitrate concentration with a supply of electron donor and carbon, the at least a portion of the treated biological material used in substitution, at least in part, for an external source of electron donor and carbon, to support said denitrification and decrease the nitrate concentration.