Water reuse: learn how this practice can help your company

One of the most important natural resources, essential for society and for production processes, water has always been treated with a relative notion of abundance in Brazil. The recent supply crises, in Brazil and in the world, are leading society to understand that water management has become a global priority. Issues related to water risk, loss management, water reuse and new technologies to mitigate these risks are increasingly recurring themes among companies that seek greater efficiency in their processes. In this text, we will focus on water reuse and how this practice can help your company to be more efficient in managing this important resource.

What is water reuse?

Although widely discussed today, the concept of reuse is quite old and stems from the very existence of the natural water cycle, which normally considers collection, use and disposal Water, however, has a natural circulation mechanism that makes it reusable several times and for various purposes. Based on this concept, we can define water reuse as the use of treated effluents for beneficial purposes, such as irrigation, industrial use and non-potable urban purposes. That is, before discarding the water, make the most of it, using efficient treatment techniques, so that the same water can be reused several times.

Reasons for water reuse

According to author Takashi Asano, the reasons for water reuse can be:

  • Reduce pollution in waterways,
  • Promote, in the long term, a reliable source of water supply,
  • Management of water demand during periods of drought.

In addition, we can add the list of benefits ranging from water savings to the containment of financial resources that the company may have with the implementation of these practices. Some industrial processes can reach water reuse capacity of 97%.

Where is water reuse most indicated?

From individual use to the highest level of business decision, reuse must be considered in all environments. At home, we can reuse water discarded by the washing machine in toilets, or even to wash the yard or sidewalks. In addition, many cities and buildings already use reused water to clean streets, areas and flush toilets. Even though it is a practice used in our daily lives, water reuse can be adopted in the most diverse types of companies, as long as there is a special assessment on a case-by-case basis for the implementation of this process. Check out some options for activities that consume a lot of water and can use reused water:

  • refrigeration
  • Boiler Feeding
  • process water
  • heavy construction
  • Irrigation of green areas
  • Floor and parts cleaning

Recycled water does not need to be used only in these mentioned processes, but also in any activity, as long as the characteristics of the water meet the quality requirements required for the application of the intended process.

What do I need to do before implementing reuse techniques?

Before implementing reuse, it is necessary to evaluate the potential of this practice for your company. This assessment will take into account:

  1. Quality of water available for abstraction,
  2. The effluent generated,
  3. Intended applications.

From this information, it will be possible to make a material balance, being essential to have data on the quality and quantity of water captured, and the effluent released into the environment. It will then be possible to determine the volume of water lost and incorporated into the products and the amount of chemical substances added to the water during use.

What technologies are available for water reuse?

In the CEBDS study Efficiency in the Rational Use of Water we identified 14 water saving technologies with market potential of R$ 49 billion. The savings generated by these technologies can reach 19% of the volume of water consumed by industry and 3% of the volume consumed by agriculture. Among the technologies mentioned, six may have application for water reuse:

  • sewage for aquaculture,
  • Evaporation by Vinasse Concentration,
  • Artificial Wetlands,
  • Ultra Filtration,
  • Reverse osmosis,
  • Thermal Distillation.
Get to know cases of companies that reuse in their processes:

braskem

O Aquapolo project was created in 2010 by Odebrecht Ambiental in partnership with SABESP (Basic Sanitation Company of the State of São Paulo). It is the largest undertaking for the production of industrial reuse water in South America and the fifth largest on the planet. With state-of-the-art technology applied to the treatment of effluents, the initiative includes a reuse water production station, a pipeline, and an extensive distribution network. About 65% of the water produced there, or 650 liters per second, goes to the Petrochemical Complex in the ABC Paulista Region. This is equivalent to supplying a city of 500,000 inhabitants. In São Paulo, the average reuse rate of the ABC, Paulínia and Cubatão plants is 87% – in the ABC alone, this reuse rate reaches 97%. Between 2014 and 2016, Braskem reused 25 million m³ of reuse water with the Aquapolo Project, freeing up drinking water consumption for the ABC region of São Paulo in a volume equivalent to 10,000 Olympic swimming pools.

Know more: https://www.braskem.com.br/detalhe-noticia/braskem-atinge-o-melhor-indice-de-efluentes-liquidos-de-sua-historia

Nestlé

Nestlé has concentrated its efforts on the self-sufficiency of its factories. Through the reuse of water extracted from bovine milk, the company has been able to eliminate the intake of new water in the environment.

An example is the NESCAFÉ Dolce Gusto coffee capsule factory in Montes Claros (MG), which uses water from the neighboring industrial plant of Leite MOÇA. Another example is the plant in Palmeiras das Missões (RS), which also uses reused water to cool towers, heat boilers, clean, help with the cooling process, among other plant needs.

With the total or partial use of reuse water, 8 Nestlé factories stopped extracting 440 million liters of water from nature in the year!

Know more: http://bit.ly/2oPqdEO  It is http://bit.ly/2HeLq1B

References:

 

Share:

Sign up for our newsletter

Enter your email and receive our content. We respect the privacy of your information by not sharing it with anyone.

Related news

Check out the most current and relevant news to stay on top of what is being debated on the Sustainable Development agenda.

Related publications

Want to go deeper into this subject? Check here other publications related to this same theme.

related events

Check out our upcoming events related to this topic and join us to discuss and share best practices.