Water scarcity is an important issue in most of the countries, especially located in a dry and semi-dry area. Many provinces in Iran are ones that will face to water shortages in future. This is not only due to the low rates of precipitation received, but also because of the increase in demand on water resources for municipal, agricultural, and industrial uses. For reduction of water consumption, many research works have been carried out. Wastewater reuse has proven to be effective and successful in creating a new reliable water supply. Great attention in using the right amount of water necessary to consume and minimizing the production of wastewater will result in saving energy that has lots of benefits. In this paper some industries were chosen to measure the possibilities of decrease in water consumption and reduction in wastewater production. The management system implemented in the companies resulted in up to 50% save in water in addition to reduction in materials used for the production. Recover of useful materials from the wastewater, recycle and reuse of wastewater in the plant and overall, of large amount of wastewater which was minimized have been resulted in the companies.

Hossein Ganjidoust received his BS in Chemical Engineering from Kansas State University, Manhattan, Kansas in 1976, 1st MS in Industrial Management from Central Missouri State University, Warrensburg, Missouri in 1977 and 2nd MS in Sanitary Engineering from the University of Missouri-Columbia in 1978 and PhD in Environmental Engineering from the University of Missouri-Rolla in 1988. From March 1995 to April 1996.

He was on a Year of Sabbatical Leave at The National Institute for Resources & Environment (NIRE), Tsukuba Science City, Tsukuba, and Ibaraki, Japan. For three years since March 2013.He has over 30 years’ experience in teaching and research in graduate levels and is presently engaged as Full Professor in the Department of Environmental Engineering, Civil & Environmental Engineering Faculty, at Tarbiat Modares University in Tehran, I.R. Iran. Dr. Ganjidoust’s research interests include water & wastewater, industrial and hazardous waste handling, treatment, and disposal. In addition, he has given many lectures related to Culture, Archeology & humanity Sciences. He has supervised more than 30 research projects, and many PhD and MS students’ theses. At present time, he is supervisor of 6 PhD theses and 8 MS theses.

He has published over 150 papers in scientific and ISI Journals and over 200 conference proceedings on his research. He was engaged in the books entitled: Principles of construction debris Landfill Site Selection (Case study: Tehran), Department of Housing and Urban Development, Building and Housing Research Center, Feb. 2013 (in Persian), "Application of Moving Bed Biofilm Reactor (MBBR) in Sanitary & Industrial Wastewater Treatment", Tarbiat Modares Univ. Published in February 2011 and a chapter on: “Hazardous Waste Management in Islamic Republic of Iran, HWM Policies and Practices in Asian Countries” published by Asian Productivity Organization (APO), Tokyo in October 2001.