Every day, wastewater treatment plants across the country process billions of gallons of wastewater. This wastewater is then discharged into our waterways, where it contaminates the water we drink, swim, and fish in.

Water reuse (wastewater recycling) is an important part of protecting our environment and ensuring a reliable water supply for future generations. It conserves water, reduces pollution, and provides a reliable water supply during times of drought.

Sewage treatment

In this blog, we’ll take an in-depth look at the benefits of wastewater recycling, including reducing water usage, conserving natural resources, and mitigating the effects of climate change. We will also examine various methods for recycling wastewater.

What is water reuse?

Water reuse is often referred to as recycling water or reclamation. Water is recovered from different sources, treated, and then used again in commercial or industrial activities, such as environmental restoration, agricultural and green irrigation, groundwater recharge, and many other production and living processes.

Water reuse can greatly improve the water security, sustainability, and resilience of water management systems, while also providing another possibility for water supply systems. There are actually two types of reclaimed water reuse: planned reclaimed water recycling and unplanned reclaimed water recycling.


Unplanned water reuse means that the previously-use water is naturally through to the source of water like river or sea. For example, communities draw water from nearby rivers, which in turn receive treated wastewater discharge from upstream communities.

Planned water reuse means designing a water system specifically with the goal of utilizing recycled water supplies. Just like agricultural irrigation, water for industrial processes and drinking water supply, all involve optimizing overall water use by reusing water.

Types of Water Reuse

Municipal wastewater, industrial wastewater, natural rainfall, agricultural runoff, and water from natural resource extraction activities are all potential types of water sources that can be utilized again. In order to achieve water reuse and make the treated water meet the standards for reuse, these water sources must be fully and comprehensively treated.

Only when the treated water source reaches the required water quality can better ensure public health and safety, be more economical and environmentally friendly, and can fully meet the water demand for specific activities.

powerful water pumps

Take agricultural production for example, recycled water needs to reach a specified water quality before it can be used for crop irrigation. Its purpose is to protect plants and soil from damage, both to ensure food safety and to protect the health and safety of workers.

Why applying water reuse?

Nowadays, the pressure on water use has increased dramatically, and there have been more restrictions and regulations on water use. Water has become more valuable and its cost has risen. When industrial facilities are reaching their production limits due to freshwater shortages, the reuse of wastewater is a necessity.


Some cases where reclaimed water reuse will be considered:

  • Water-scarce areas lead to limited production
  • Achieving CSR goals requires a reduced water footprint
  • Meeting Wastewater Restrictions
  • Reducing the impact of drought by reusing wastewater
  • Integral Water Cycle Management in Residential Areas

Where and how to apply water reuse to reduce the water footprint?

There will be no other choice but to reuse the treated effluent in the most effective way due to the ongoing fight for additional water in the future. With regard to municipal and industrial aspects, there is a wide range of technological and technical treatment options for wastewater reuse.

Rainwater harvesting

Each industry can conduct a comprehensive assessment to find the most suitable treatment plan for reclaimed water reuse. Freshwater resources are always limited, industrial production continues to expand, and the use of wastewater is clearly the trend of the times.

Applications for water reuse

Reclaimed water reuse is a process of treating wastewater, removing pollutants and impurities, and improving water quality. Some of the treated wastewater will be re-introduced into the water source, and some will be transported to different industrial processes or applications for secondary use. The following are some specific application types of reclaimed water reuse:

  • Turn industrial wastewater into recycled water.
  • Cooling water is treated and sanitized for repeated use.
  • Recycling of used CIP fluids from industrial processes.
  • Turn roof rainwater into domestic water and reuse residential water.
  • Convert domestic sewage into irrigation and process water.
  • Turn groundwater into drinking water or other industrial processing uses.
  • Turn sea water into drinking water.

The economic and environmental impact of recycled water

The majority of nations in the world charge for freshwater. Wastewater recycling and reuse significantly lower this expense. Gray water or wastewater is available for agricultural uses at a low cost. Similarly to this, the price of water has a significant impact on industry product prices.


Water recycling has significant environmental advantages. Water recycling can help us identify strategies to reduce the amount of water that is diverted from delicate ecosystems by offering an extra supply of water. The reduction of wastewater discharges and the prevention and reduction of contamination are further advantages.

Sustainable water purification systems

Reclaimed water reuse technology is widely welcomed by various industries. The water quality requirements, treatment purposes, and process methods of each industry are quite different. The following are some of the more common water reuse treatments and technologies.

Membrane aerated biofilm reactor(MABR)

Membrane aerated biofilm reactors use aeration and biofilm-based nitrification and denitrification to provide primary and secondary treatment for water reuse. This method is more suitable for the decentralized treatment of urban wastewater.

Anaerobic Membrane Bioreactor (AnMBR)

Anaerobic Membrane Bioreactor works by using Membrane Bioreactor, which is a membrane filtration technology for biomass retention. The technology provides better quality treated wastewater and is more suitable for wastewater treatment in the dairy industry.


Tertiary Treatment for Industrial Reuse

Tertiary treatment is a wastewater treatment method that eliminates non-biologically decomposable pollutants. The technology is based on chemical and physical processes to remove phosphorus and nitrogen contained in water to refine water, such as process water and ultrapure water, and includes the following technologies:

Ultrafiltration (UF)

Reverse Osmosis (RO)


UV disinfection

Advanced oxidation


Water reuse technology is frequently regarded as a solution with tremendous promise in closing the gap between availability and demand as freshwater supplies become increasingly scarce and economic expansion is accompanied by increasing water consumption.

Brother Filtration is committed to providing innovative and cost-effective solutions and related filtration products to meet different water reuse and water treatment challenges. Contact our professional technicians to discuss the best solution together.

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