79036402
Jan 23, 2007
Apr 8, 2008
water and wastewater treatment units; water and wastewater purifying units; units for the biological treatment of wastewater; units for the treatment by waste activated sludge; units for the treatment by waste activated sludge and by alternating decanting and aeration sequences; units for the clarification of wastewater which have been treated by a biological treatment
Environmental Control Apparatus