Business Green: Frito Lay’s factory in parched Casa Grande, Arizona, is close to moving off the water grid. A large-scale water recycling system, now in its final stages of installation, will direct all water used in the plant through a membrane bioreactor filter system to treat it to drinking-quality standards before funneling it back into the facility for reuse. When fully operational at the end of 2009, the Texas-based global snack food company expects to recycle 85 per cent to 90 per cent of the …