Economics Savings are substantial as the business is charged for the fresh water being used as well as for its discharge into the trade waste sewers. Benefits Water is reused rather than being discharged after a single use. The business now has the necessary technology for implementing diverse projects to save energy and liquid and sold waste. An air cooling system for the air compressor was replaced with a water cooling system. The water absorbs the heat from the compressor and is then reused in the boilers.
Energy is saved in the boilers as the water is already partially heated.
Back-up generators are used for load shedding at peak times, reducing the electricity charge per unit. Although this is not their primary purpose, they have made a useful savings. Light sensors have been installed in many parts of the plant to minimize electricity usage. This does not account for the reduction in energy needed to heat the water in the boilers. The back-up generators have a payback period of 4 to 5 years, although it should be kept in mind that they were purchased for security of energy supply rather than for cost saving measures.