Effects of Pulse Electromagnetic Field on Wastewater in Treatment Plants

The influence of a pulsed electromagnetic field (PEMF) with a pulse repetition rate of 16 Hz and a magnetic induction of no more than 500 nT on the solubility of oxygen in water and on wastewater treatment in two operating treatment plants was studied. It has been shown that treating wastewater with these pulses increases the maximum solubility of oxygen in water approximately by 30%, from 5.1 mg/dm 3 to 6.8 mg/dm 3 and accelerates all wastewater treatment processes by 10–20% and thereby creates a productivity reserve of the wastewater treatment plants. It was concluded that when operating blowers controlled by oxygen sensors, which turn on at an oxygen concentration of about 2 mg/dm 3 and turn off at 4 mg/dm 3 , water PEMF treatment in the aeration tank leads to a reduction in the operating time of the blowers and, accordingly, energy savings by 15–28 %.