Pillars of Sustainability

Water Usage

This index shows the ratio of water used for each metric ton of feedstock crushed or processed.*

As with our other environmental key performance indicators (KPIs), the decrease in the volume of feedstock crushed in our assets worldwide in 2020 led to challenges in the reduction in our water consumption index. However, a significant reduction was still achieved through a combination of leakage control, water reuse and process improvements.

In our juice production facility in Bebedouro, Brazil, the water used to wash the dry peel was previously discarded as unusable due to its high sugar and nitrate content. A water filtration system had been installed, including an evaporator to concentrate the water, to recover and recycle this water for reuse. This allows us to reuse 25 to 30m³ of water every hour, which amounts to about 600m³ per day and more than 16,000m³ per month.

*It is measured in cubic meters per metric ton (m³/MT).

In Claypool, US, the water used in degumming – the process whereby gums and lecithin are removed from crude soybean – was previously discarded as sewage. A degumming condensate recovery system has been installed, and we are now sending the recovered water to the plant’s boiler. This has led to environmental benefits on several fronts: saving water, reducing water treatment, cutting natural gas consumption and avoiding heat loss.

In Dongguan, China, a major new wastewater recycling initiative has resulted in a 33% year-on-year reduction in water use.

Down

1.2%

2020: 0.489

2019: 0.495

Case Study

Zhangjiagang processing plant has decreased its annual water consumption

Our Zhangjiagang oilseeds processing plant in China has decreased its annual water consumption by 50L/MT, leading to an expected annual cost saving of US$53,000. The main actions taken were: 

Reduce freshwater consumption by using cooling tower water to cool expanders’ refrigeration oil, and recycle used cooling water to the cooling tower.

Recycle water within the plant. After cooling the centrifuge seal and lecithin film evaporator seals, water can be recycled to the cooling tower for reuse. 

Self-circulation of working water. A new circulation system recycles and reuses the water of two ring pumps in the lecithin processing system, and one ring pump in the oil dryer system.

You may also be interested in