Armatec Website March 11, 2015 H2S Removal, Odour Control, WWTPs Biological Scrubber for odour control at award-winning WWTP Armatec Website March 11, 2015 H2S Removal, Odour Control, WWTPs Armatec designed and installed a >99% efficient biological scrubbing system for the award-winning Pines II Rolleston wastewater treatment plant.