Over the past decade, water has been one of the most talked about topics in the world. Water is a limited source but human needs for water are unlimited. In fact, drinking water is decreasing sharply from year to year, but people still use it unconsciously. How to use water efficiently to meet human water needs is a difficult question for all of us. Faced with this problem, some believe that industrial wastewater should be reused many times, while others doubt the safety of recycling wastewater into production. From our point of view, we believe that it would be better if the treated wastewater could be reused in production instead of being released into the environment, as this has many benefits, such as solving pollution problems and water waste, as well as saving money. , the main reason for water pollution is city sewage 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 from wastewater, which affect groundwater courses and destroy aquatic ecosystems. Polluted water cannot be used for purposes such as household, recreation, agriculture and industry. Even more serious, 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. Additionally, water is very important for all types of businesses, especially for industries that rely on water for their operation. Without regular access to drinking water,...... middle of paper ......net/tin-tuc/khoa-hoc/ky-thuat-moi/he-thong-xu-ly-nuoc- thai-3-trieu-usd-2918111.htmlRoa, DV (February 22, 2013). Blue technology. Retrieved January 10, 2014 from bluetechresearchg.com: http://www.bluetechresearch.com/no-water-no-business-the-importance-of-water-stewardship/Saving water means protecting life. (December 31, 2009). 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). Spin CDs to clean sewage. Retrieved from http://www.sciencedaily.com/releases/2013/09/130923175932.htmSGGP. (2013). Benefits of wastewater reuse. (2013) Retrieved from http://www.sggp.org.vn/doanhnghiepxanhden/2013/10/330710/Water management. (nd). Aluminum for the future. Retrieved from http://bauxite.world-aluminium.org/refining/water-management.html