Water Recycling and Reuse

Water Recycling and Reuse

Introduction

Almost all human activity uses water in processes that pollute and mixed with substances that prevent later consumption, making fewer and drinking water resource in the world, alarming situation. Only 2.5% of the planet's water is suitable for drinking, industry and agriculture. Given this fact, and the vital dependence on water, it is necessary to know how to treat and recycle water as it is an increasingly scarce good (Carrey, 2011). One of the easiest and most effective forms of water recycling is to recover the rainwater. It is important to say that we can recover these waters are not fit for human consumption, but perfectly useful for irrigation, household cleaning and other tasks that require water. In fact, the used water is not only dirty or unclean but also has traces of chemicals called "sewage". This means, process of purification separates these harmful substances and make the water ready for reuse (Shukla et al., 2012). This paper discusses that Why is it necessary to recycle water and what are the applications of recycled water?

Discussion

Industrial water treatment is a process of recovery of the quality of the water used by industry. Water treatment should be guided by a professional in the area such as a chemical engineer, environmental engineer, chemist or chemical technician. Frequently, water is used in industry for various purposes ranging from simple cleaning up the cooling of industrial processes. This water often contains heavy metals and other toxic chemicals to the environment and so the water needs to be recovered before its release in the network of sewers or in waterways (MWH, 2005). No doubt, water is an essential element in virtually all industries. Encouraged by economic reasons, several companies conduct programs for the management of its water resources. They implement reuse projects, waste reduction techniques and rationalization of obtaining significant reductions in water consumption and effluent discharges to the environment. The methods used for recycling were first use of conventional treatments. Complementary therapies are then put in place, depending on the quality of water that is desired (Carrey, 2011):

treatment tanks.

a biological treatment filter first.

treatment by microfiltration and/or ultrafiltration methods associated with UV disinfection for irrigation or groundwater recharge.

treatment by reverse osmosis or nanofiltration associated with methods of UV disinfection for water high quality: drinking water, high-tech industry.

Applications

Agriculture is by far the most important in terms of volume simply because it is ...