World Food Day 2023: How to manage water waste in food production

One of the standout innovations in Dutch agriculture is vertical hydroponic and aeroponic farming; cultivating crops in stacked layers often controlled in indoor environments. By using the hydroponic system (growing water-based instead of ground and soil-based) and adding advanced LED lights, vertical farming can produce crops year in and year out with a fraction of the water needed for traditional farming.

For example: To grow 1kg of tomatoes in traditional soil-based farming you will need 214 liters of water. By using hydroponics this is reduced to 70 liters.

The newer and improved innovation of aeroponics (the spraying of roots to grow crops) can do this with even less water, at only 20 liters of water required.

These types of solutions also resolve the challenge of square feet required to grow crops in a traditional way and have now been globally adopted.

Its innovations like vertical farming which can help to tackle the problems we have not only on a local but on a global basis looking into water scarcity for food production. We need to embrace innovation and adopt as many technologies as possible to contribute to a solution.

In-depth knowledge of technology plays a big role in this challenge. Utilising research and development initiatives and having the best and brightest technical specialists working on this challenge is a must.

We need to scale up incentives looking into new and thriving solutions. Governments, as well as large multinational companies, play a big role in the speed and decisiveness that is needed to globally address water efficiency.”

What is hydroponic farming?

Hydroponic farming eliminates the use of soil for a plant to grow. Instead, a different material is introduced to support the root growth and health of the plant.

In order for a hydroponic system to be successful it needs to provide the following five things to the plant: fresh water, oxygen, root support, nutrients, and light.

There are six main systems for hydroponic farming. These are deep water culture (DWC), nutrient film technique (NFT), ebb and flow, wick, drip, and aeroponics.

What is aeroponic farming?

Aeroponic farming is the process of growing plants within an air or mist environment and is one of the six basic types of hydroponic growing methods. With the roots suspended in the air, the plant is regularly sprayed with a nutrient-dense mist which provides the plant with the water, nutrients, and gasses it requires to grow.

The term ‘aeroponic farming’ was originally coined by the Dutch biologist Frits Warmolt Went in 1957. However, it was Richard J Stoner, founder of Genesis Technology Inc, who is often credited as being the ‘father of modern aeroponics’.

What is vertical farming?

Vertical farming involves stacking plants vertically on shelves or tall pillars to better utilise space upwards. This, in turn, allows for 10 times the crop yield for a given land area. As with other types of farming, specific requirements must be met and provided in order for the plant to be a success, such as (artificial) temperature, light, water, humidity, and nutrients.

Brunel specialist Astrid Madsen is a Dutch-based climate and energy advisor for the public sector, for example for water companies and cities. Her focus is on realising the energy transition while safeguarding public values with a holistic approach.

Brunel spoke to her about the future of water management in the Netherlands and to gather her advice on what companies and organisations can do to improve the availability of high-quality water.

Enough clean water

To ensure the Netherlands continues to provide enough clean water, one of the main actions should be realising and maintaining chemically-clean and ecologically-healthy surface water and groundwater (as stated in the EU Water Framework Directive to achieve good status for Europe’s rivers, lakes, and groundwater).

This means avoiding pollution of the water and restoring, where needed, by legislation and cooperation.

The other major issue is to use less water and redesign our water systems to retain (rain) water so it can boost the groundwater levels. This is especially important after periods of drought. 

When it comes to innovative practices, companies can adopt to ensure sustainable water management. Astrid states that new methods of cleaning water (both drinking water as well as processes in the wastewater treatment plants) also need to be looked at and implemented.

As well as this, cities, waterboards, and drinking water companies need to work together to improve the water systems, both in terms of quality (creating and keeping it clean) as well as quantity (using less and providing a buffer for periods of drought). There have already been examples of major Dutch water companies working in collaboration to this end, realising cross-sectoral solutions. 

However, there are still challenges for Dutch water boards to overcome. According to Astrid, solutions can be found in technology (e.g. investing in innovations), organisations (e.g. better cooperation between different stakeholders), and rules and regulations (e.g. the creation of legal frameworks to avoid further or new pollution).

Society itself can also play an important role by being encouraged to consider their water consumption use or to eat a more plant-based diet which traditionally requires less water.

Collaboration among governments, the private sector, farmers, academia, civil society, and individuals is imperative to address global water challenges. The essential goal is to enhance food and vital agricultural production while minimising water usage. This hinges on embracing innovative solutions, and the choices and actions of each individual hold significant transformative power in safeguarding our water resources.

Brunel specialises in pioneering projects that are at the forefront of innovating the industry. With over 15 years of operations experience in Life Sciences and a powerful global network, we connect the most talented and experienced specialists with pioneering projects across the Food Production industries.

Brunel is a Global specialist delivering customised project and workforce solutions to drive sustainable industry transformations through technology and talent. With over 45 years of market experience in Life Sciences, Renewable Energy, Conventional Energy, Mining, Future Mobility, and Infrastructure, our global network of specialists supports you in finishing major projects safely, compliantly, on time, within budget, and at the highest quality, so you can keep growing — anywhere in the world.