Société des Eaux de Volvic (SEV) is a Danone Group company and bottles 1,700,000,000 liters of mineral water per year. Fruit drinks account for 25% of this total. To meet product quality standards, the plant frequently cleans and flushes the systems, generating waste with high sugar and fruit content. In 2014, the pre-treatment plant struggled to reach 45% of its nominal capacity. As a result, officials approached a consulting firm, IFB Environnement, for a diagnosis of the problem and a plan to enable the plant to achieve its nominal capacity within two years and increase it further by a goal of 50%. It was not possible to achieve these goals using only laboratory measurements based on grab samples.
The plant aimed to control the operation of its treatment plant through optimization on several levels:
• Isolating highly concentrated effluents entering the treatment plant by organic load using online TOC measurement.
• Manage the biological treatment feed rate based on to the buffer tank level and the concentration of effluents to avoid bypassing the plant and allow incoming organic load to be more consistent.
• Automate and optimize nutrient injection to ensure a continuous and optimal C, N, and P ratio in the aeration tank.
• Increase the reliability and round-the-clock safety of the discharge from the system in accordance with the current discharge standards for the industrial facility.