The thermal processes used in the ZLD treatment system to recover a larger percentage of the water in the discharged waste also incur higher costs, which are usually not cost-effective and do not increase efficiency. By applying the MLD treatment system, 95% of the factory or power plant effluent can be recovered without incurring the staggering costs of the ZLD method. In fact, unlike the ZLD method, the MLD method uses membrane processes for purification, and in general, the use of membranes is preferred to the use of thermal processes. Finally, the use of membrane processes in the MLD system can save up to 60% on ZLD system costs by eliminating heat processes alone.

In general, the ZLD method has long been considered an appropriate and environmentally friendly method for waste disposal. However, over time, rising water supply costs, along with increasing drought intensity, have posed challenges to wastewater treatment processes, leading researchers to question the use of the ZLD system. The ZLD method is a method that is very complex in terms of technology and requires high costs. At the same time, it can not be considered completely without harm to the environment, because the additives or the amount of heat that enters the environment in this way can cause even minor damage to vegetation or animals. This is why many users and consumers have gradually moved towards replacing the ZLD method with the MLD method. Such a move could reduce unnecessary costs and increase productivity by replacing heating processes with membrane-based processes.

In order to find the best and most appropriate way to deal with the effluent of a plant or power plant, it is necessary for the most important indicator to be investigated; That is, water recovery. If water recovery is of importance, you can use the MLD method to be able to recover the needed water from the waste. If abiding the environmental and government laws and restrictions is a major concern, the MLD system can be used as a component of the whole treatment system, which can include ZLDs, evaporation ponds, and groundwater injection.

Zirsakht Tadbir Arian Company is one of the leading companies providing engineering services such as Petrochemical, Oil & Gas, Water, and Wastewater Treatment. The company has undertaken several large projects and has successfully implemented them. ZETA is committed to carrying out all the steps required to launch various treatment systems, including MLD and ZLD treatment systems, from the design and engineering stage, equipment purchase, installation, and final commissioning. By abiding all the principles and rules of engineering and environmental regulations and with the help of the best engineers and specialists active in the field, Zirsakht Tadbir Arian (ZETA) Company is able to undertake large projects and taking responsibility for all of the necessary steps needed such as system design, purchase and preparation of ​the equipment, installation and final preparation. ZETA does all of these steps with the best and most up-to-date equipment and methods and provides the most efficient and high-quality services to its customers