In the last decade, water has been one of the most mentioned topics in the world. Water is a limited source, but human water needs are unlimited. Clean water, in fact, decreases drastically from year to year but people continue to use it unconsciously. How to use water efficiently to meet human water needs is a difficult question for all of us. Faced with the problem, some believe that industrial wastewater should be reused multiple times, while others doubt the safety of recycling wastewater in manufacturing. From our point of view, we think it would be better if treated wastewater could be reused in production instead of being discharged into the environment because it has many benefits such as solving pollution and water waste problems, as well as saving money. , the main reason for water pollution is urban wastewater and industrial water discharged into rivers. According to a recent survey, only 10% of wastewater is treated while the remaining 90% is discharged directly into water bodies (Edugreen, 2012). Water quality is deteriorated by toxic substances in wastewater, which affect underground waterways and destroy aquatic ecosystems. Polluted water cannot be used for domestic, recreational, agricultural and industrial purposes. More seriously, it has negative impacts not only on the human body but also on animals, fish and birds. No one can escape the effects of water pollution (Edugreen, 2012). Therefore, wastewater treatment and water reuse help reduce liquid and hazardous waste in the environment around us. Furthermore, water is really important for all types of businesses, especially for industries that rely on water for their operation. Without regular access to clean water,...... middle of paper......net/tin-tuc/khoa-hoc/ky-thuat-moi/he-thong-xu-ly-nuoc-thai - 3-trieu-usd-2918111.htmlRoa, D.V. (February 22, 2013). Blue technology. Retrieved January 10, 2014, from bluetechresearcg.com: http://www.bluetechresearch.com/no-water-no-business-the-importance-of-water-stewardship/ Saving water is protecting life. (2009, December 31). Retrieved from http://www.sonongnghiep.hochiminhcity.gov.vn/tintuc/lists/posts/post.aspx?Source=/tintuc&Category=TIN PHÁT TRIỂN NÔNG THÔN&ItemID=1410&Mode=1Sciencedaily. (2013). Rotating CDs to clean wastewater. Retrieved from http://www.sciencedaily.com/releases/2013/09/130923175932.htmSGGP. (2013). Benefits of reusing wastewater. (2013) Retrieved from http://www.sggp.org.vn/doanhnghiepxanhden/2013/10/330710/Water management. (n.d.). Aluminum for the future. Retrieved from http://bauxite.world-aluminio.org/refining/water-management.html