MUMBAI, India, Jan. 2 -- Intellectual Property India has published a patent application (202541125005 A) filed by B V Raju Institute Technology, Narsapur, Telangana, on Dec. 11, 2025, for 'a hybrid electrodialysis-nanofiltration system for high-efficiency recovery and concentration of citric acid from lime juice and fermentation broth.'
Inventor(s) include Dr. Boya Venkata Swamy; and V. Chaithanya Kumar.
The application for the patent was published on Jan. 2, under issue no. 01/2026.
According to the abstract released by the Intellectual Property India: "The invention provides a hybrid electrodialysis-nanofiltration system for the high-efficiency extraction and concentration of citric acid from lime juice and fermentation broth. In the first stage, electrodialysis selectively transports citrate ions from low-purity feed solutions into a concentrate compartment by applying an optimized electrical potential, enabling rapid ionic separation with improved current density and reduced power consumption. In the second stage, the electrodialysis concentrate is subjected to nanofiltration, which rejects organic acid molecules while permitting water and small ions to permeate, thereby producing a higher-purity citric acid concentrate. The hybrid process minimizes chemical usage, reduces energy requirements, and offers an industrially scalable solution for organic acid purification."
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