Water & Wastewater Treatment

Water & Wastewater Treatment

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About Water & Wastewater Treatment

Water treatment is an industry and a process that is carried out in order to increase the quality of water and depending on the type of use, it can include various methods. The treated water can be used for drinking, the water source for various industries, irrigation, river flow maintenance, or even for use in water amusement parks.

In short, the water, wastewater and effluent treatment process removes contaminants or undesirable substances from the inlet waste or, depending on the end-use purpose, reduces the concentration of these materials in that feed to such an extent that they are suitable for that particular purpose or need.

Water & Wastewater Treatment Processes

Processes used in water treatment can actually involve physical processes such as sedimentation or filtration, or chemical processes such as disinfection and coagulation, or even biological processes such as slow sand filtration. Of course, it is important to know that depending on the type of wastewater to be treated and the type of final purpose of its consumption, a combination of these processes can be used as physicochemical and biological processes in order to achieve the desired efficiency in the treatment process.

In general, there are two comprehensive models for the purification process. Zero Liquid Discharge and Minimum Liquid Discharge processes are in this category, which will be described in detail below. It should be noted that Zirsakht Tadbir Arian (ZETA) Company, by utilizing the latest technical knowledge in the world and with the help of the latest technologies and equipment, will undertake all the services related to the purification mentioned below. From the most basic stage; It studies the treated wastewater to more advanced stages such as the purchase, installation and preparation of equipment.

Zero Liquid Discharge

Read More About ZLD Process

Minimum Liquid Discharge

Read More About MLD Process

Water & Wastewater Treatment Methodes

In general, the water and wastewater treatment process can be divided into two main parts, pre-treatment and post-treatment. The purpose of the pre-treatment stage is to remove undesirable factors such as impurities, solids, suspended colloidal particles and living organisms present in the wastewater. One of the most important benefits that this process gives us is to ensure the final water quality. Pre-treatment processes allow water and wastewater quality to not be affected by factors such as seasonal changes, industrial pollution and severe weather conditions. Pre-treatment processes are classified into different types depending on the type and method or materials that will be removed in the end, but in general, pre-treatment processes in the water and wastewater industry can be divided into two general models:

Physical and chemical processes (Physicochemical)
Biological processes

Physicochemical processes may include processes such as silica softening removal from wastewater and filtration, each of which will be described in detail in the pre-treatment section. Zirsakht Tadbir Arian (ZETA) Company, using modern equipment, undertakes all types of pre-treatment processes and selects the best pre-treatment method based on the ultimate goal of using wastewater.

Water & Wastewater Treatment Processes

The post-treatment process is a process that includes steps such as maintaining the stability of the wastewater, disinfecting it and controlling corrosion in the water supply system, and can also include processes such as degassing or air separation. The biggest concerns facing power plants and treatment plants in the post-treatment phase include issues such as the composition of the effluent, minerals that may have been added to the effluent during the various stages of treatment, disinfection, and materials used to store the final effluent. Various steps and methods are used to perform the purification process, including Electrodeionization method, Ion Exchange, and Mixed Bed method. Zirsakht Tadbir Arian (ZETA) Company, using the latest technologies in the world and with the help of competent experts in the field of water treatment, using factors such as legal and regulatory requirements and restrictions, design of treatment or water supply system, desirable water quality indicators selects the best and most suitable method for performing wastewater post-treatment process. After the post-treatment process, the treated wastewater will be ready for sludge removal or sludge treatment.

Finally, after performing the post-treatment process, it will be time to remove the sludge or sludge treatment/removal. In fact, during this stage, with the help of various processes, the wastewater sludge produced during wastewater treatment will be managed and disposed of. Sludge is actually composed of undesirable water and solids separated from the liquid part of the wastewater. Some solids in wastewater can be separated by sedimentation, but other solids must be separated by special processes. By purifying and digesting the sludge, its quantity and volume can be reduced, and as a result, the wastewater disposal process will be much simpler and the disposal costs will be reduced to a desirable level. The main goal of this section is to reduce the amount of organic compounds and pathogenic microorganisms present in the effluent. The most common methods of sludge treatment are aerobic digestion, anaerobic digestion and composting. Sludge treatment and digestion help power plants and factories in terms of cost savings. This method can reduce the amount of sludge and undesirable solids in wastewater by up to 50% and at the same time provide biogas as a valuable energy source for the plant.

Zirsakht Tadbir Arian (ZETA) Company, using the latest technologies in the world, with the help of experts in this field, undertakes all stages of treatment, including the purchase of equipment, their installation, and performing the needed processes.

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