Purified sewage as an alternative source of water

Abstract

Water scarcity is one of the biggest global problems affecting all societies in the 21st century. Climate change has already been acknowledged by most of the world's scientific community and found that it’s primarily caused by the greenhouse gas emissions from human activities, industrial activity, motorized transport, industrial agriculture. The consequence of the climate change is the more acute water cycle, the change in evaporation conditions, which is further strengthened by change of the surface (change of plant cover, change in the ratio of enclosed or built-up areas, drainage of surface water, etc.) and direct heat emission of buildings, plants, vehicles, etc. in built-up areas. The growing population and the changing climate result water demand increase. This fact, and the limited access to water, plus the fierce competition for water sources, have created the need for today's so-called "non-traditional” sources of water, like lowyielding wells and springs, rain water, rainfall precipitation, urban rainwater and that’s why waste water recycling should be also considered in water management