Environ Engineering Company, Vadodara, claims to be the only manufacturer in India, who has got Oxygen Transfer Testing Facility, as per American standards and wrinkler’s procedure for aerators upto 150hp ratings. Environ has tested the aerators and got the results as follows:• Aurobindo Pharma Ltd., Vizag for 100HP 4 nos. on Sept 20, 2002 and achieved 2.24 kg of O2/HP/HR• Reliance, Hazira for 50HP on Sept 9, 2004 and achieved 1.6 kg of O2/HP/HR• Cheminor Drugs Ltd., Hyderabad for 30HP on July 18, 2000 and achieved 2.82 kg of O2/HP/HR• Pattancheru Enviro Tech Ltd., Pattancheru (APIDC) for 30HP aerator on Dec 17, 2004 and achieved 1.91 kg of O2/HP/HR• Dombivili Better Environment, Dombivili (CETP), MIDC for 40HP aerator on Feb 7, 2005 and achieved 1.98 kg of O2/HP/HR• Deonar Slaughter House, Deonar for 30HP aerator on Aug 28, 2003• Torrent Pharmaceuticals Ltd., Indrad (Ahmedabad) for 30HP aerator on Dec 13, 2006 and achieved 1.96 kg of O2/HP/HR• Kodinar Sugar Factory for their order of 4 nos. 30HP aerators• Hindustan Newsprint Ltd., Kottayam Dist. for 25HP aerator on Dec 9, 2004 and achieved 2.40 kg of O2/HP/HR• Tamilnadu Petro Products, Chennai for 25HP aerator on Feb 16, 1999 and achieved 2.20 kg of O2/HP/HR• South India Viscose (SIV Inds.), Coimbatore for their order of 10 nos. 20HP aerator on Aug 18, 1994 and achieved 1.72 kg of O2/HP/HR• Tamilnadu Petro Products, Chennai for their order of 20 nos. 10HP aerators on Nov 15, 1997 and achieved 1.70 kg of O2/HP/HR oxygen transfer• Tamilnadu Petro Products, Chennai for 10HP aerator with 3 per cent salinity in effluent and achieved 1.03 kg of O2/HP/HR• Deonar Slaughter House, Deonar for 10HP aerator on July 01, 2003• Gujarat Insecticides Ltd., Ankleshwar for order of 5 nos. 5HP aerators on Aug 02, 1999 and achieved 1.82 kg of O2/HP/HR• Vapi CETP for 40HP aerator on May 20, 2009.