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2021-10-10 09:30:37

Methods of recycling and reusing water

Methods of recycling and reusing water

Methods of recycling and reusing water

Reuse of effluents and recycling of effluents and extraction of effluents is important because due to the increasing population, reduced rainfall and drought in recent years has reduced the water level of groundwater resources and reduced surface resources and forced humans to Seek to use new water resources.
Today, treated wastewater from wastewater treatment plants as a new and permanent source has been considered by experts to compensate for water shortages. In various ways, treated effluent can be used to prevent water wastage.

Most countries in the world are facing water shortages and as the world's population is increasing, water has been seen as a very valuable resource and many efforts in some countries to exploit water more efficiently and use every drop to ensure In order to maximize the optimal use of existing water resources, the methods of recycling and reuse of wastewater from one country to another are different based on the degree of water shortage, economic situation and other factors. Utilization of unconventional water resources is an example of recent approaches in the development of new water resources and water storage in the face of river rainfall and groundwater, which are considered as normal freshwater sources. Unconventional water resources, including: freshwater Seawater recycling is the recycling of agricultural effluent and municipal wastewater

Methods of using treated effluents
1- Agricultural and green space irrigation:

One of the most common uses of treated effluent is to irrigate green spaces or irrigate agriculture. Most aerobic wastewater treatment processes such as extensive aeration process, MBBR process, SBR process and خواهند will easily reach the standard if designed and guided by principles. Agricultural irrigation using effluent is done in various ways, including drip, water drowning and…

2- Use in industries:

Another use of treated effluent is in the industrial production line as inlet water or washing. This method of use is currently used in many industries and industries use the effluent from their treatment plant. Another industrial use of treated effluent is its use for cooling.

3- Fish farming:

The quality of treated effluent for fish farming should be within the standard level for discharge to surface waters. For this purpose, it must be designed and managed accurately and scientifically.

4- Use for bathing or drinking:

The use of treated effluent for bathing or drinking is not very common. To achieve this quality, the MBR process must be used along with advanced purification. After the purification process and observing the hygienic standards, the effluent can be used for bathing or drinking.

Water recirculation
Water recycling is the process of converting wastewater into water that is used for other purposes. This water can be used for irrigation of green space, agriculture or filling groundwater aquifers. Also, this water may be used directly for special purposes such as commercial, industrial, urban. By treating this effluent, even drinking water standards can be achieved. When water is returned to natural water sources, it can still be useful for ecosystems, plant nutrition, and aquifer nutrition.

The World Health Organization has authorized the reuse of wastewater in the following cases:

1- Increased water shortage and the resulting stress

2- Increasing population and issues related to food security

3- Increasing environmental pollution caused by improper wastewater disposal

The importance of recycling and reusing water is increasing not only in arid areas but also in polluted cities and environments.

Large amounts of drinking water can be stored using recirculating water. Reuse of water can be an alternative to water resources.

The uses of the effluent are as follows:

1- Urban use: irrigation of green space, sports facilities, private gardens, car wash

2- Agricultural use: hydroponic cultivation, aquaculture, greenhouses, beverage industry

3- Recreational use: Irrigation of golf courses, water recreation

4- Industrial use: cooling systems, cooling towers, concrete construction

5- Environmental use: feeding aquifers, swamps, swamps

6- Drinking use: Strengthening surface drinking water resources, feeding the aquifer for drinking water use

In Iran, due to the water crisis and drought and the reduction of water resources, water recirculation is a basic need. That is why wastewater treatment plants and networks are being built. For example, in the city of Shiraz, which is a green city. Water treatment plant No. 2 of this city can provide the water needed for irrigation of green space and industries by producing effluent.