A water softener has 0.1 m3 of ion-exchange resin with an exchange capacity of 100 kg/m3 . The consumption rate is 5,000 L of water per day. If the water contains 270.0 mg/L of hardness as CaCO3 and it is desired to soften it to 85 mg/L asCaCO3, how much should be bypassed? What is the time between regeneration cycles?

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Wind Energy

Wind energy is a renewable energy source that is used to generate electricity by wind power. The term, wind power, means utilization of kinetic energy of wind to generate electricity. Wind energy is termed renewable source energy because it can never be exhausted. There are other renewable energy sources, such as solar energy, geothermal energy, hydropower energy, and so on. All of them contribute to power the thermal energy stations to generate electricity.