Problem: The Stavnsholt Wastewater Treatment Plant in Denmark faced persistent odor complaints. Despite attempts at treatment with ferric chloride, the odor persisted, leading to a search for a solution for the plant, designed to handle 5,000 kg (11,000 pounds) COD per day.
Solution: Partnering with TECHRAS Nano, the plant implemented nanobubble technology (Moleaer) in November 2022. The nanobubble generator emits bubbles 10,000 times smaller than conventional fine bubbles, inhibiting anaerobic conditions that breed malodorous compounds.
Result: Summer odor complaints significantly decreased, ceasing entirely in other seasons. Ferric chloride usage was reduced by 84%. Primary clarifier efficiency improved as shown by lower chemical
