At the top of the laws of advanced and industrialized countries of the world, attention to the environment has a special place. For this reason, investment is made both in the creation and development of infrastructure and in the use of modern knowledge and technologies in this field. It can be said that the treatment of urban and industrial water resources and wastewater is one of the most important environmental activities around the world. For this reason, the growth of technical knowledge used in this field is accompanied by a significant leap every day, and many different methods are used to treat water and wastewater. Wastewater treatment is important in two ways:

• Treatment to bring wastewater to environmental standards
• Recovering available water for various uses including agriculture and irrigation

There are various methods for water and wastewater treatment, which can be generally divided into three parts: chemical, biological, and membrane. In addition to the methods mentioned, there are other methods and also combined methods to remove environmental pollutants. The existence of various methods has made the knowledge and science of water and wastewater treatment very extensive, and companies operating in this field, if familiar with all the available methods, can offer a better method for treating a specific wastewater. Sometimes choosing a suitable method for wastewater treatment leads to a reduction of several hundred million in the costs of implementing a project, which ultimately makes the implementation of the project more valuable. Therefore, and considering the importance and special position of this process, an independent department was established in the Kimia Trava Tek Company to consult, implement, and launch water and wastewater projects, which is ready to serve various industries and individuals with the lowest investment cost. Familiarity with various types of water and wastewater treatment methods has enabled the company’s members to provide the best method for treating the relevant wastewater without relying on a specific method, in a way that maximizes efficiency and quality from the existing wastewater at the lowest cost. The company’s services in this field include:

• Consulting on existing methods for treating various types of wastewater
• Design and construction of reverse osmosis packages for water purification
• Design and implementation of projects for treating various types of urban and industrial wastewater
• Design and construction of various types of equipment used in the field of water and wastewater purification, such as sand filters, carbon filters….