MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202631028157 A) filed by Indian Institute Of Technology Guwahati on March 10, 2026, for Method For Producing Plant Growth-Promoting Bacteria (pgpb)-Enriched Biofertilizer.
Inventors include Kisholay Mazumdar; and Saswati Chakraborty.
The application for the patent was published on June 26, 2026, under issue no. 26/2026.
Abstract: ABSTRACT Method for Producing Plant Growth-Promoting Bacteria (PGPB)-Enriched Biofertilizer The present invention provides a biotechnological process for producing a biofertilizer enriched with Plant Growth-Promoting Bacteria (PGPB) from wastewater. The method comprises treating sewage-contaminated wastewater (SCWW) with a living hyperaccumulator aquatic plant, preferably Trapa natans, in a free-surface constructed wetland system. By maintaining a plant-to-water ratio of approximately 1:1 by volume for a 28-day duration, the process selectively enriches a microbial consortium where PGPB (such as Pseudomonas and Bacillus) constitute at least 30% relative abundance. Simultaneously, the method achieves phytoremediation of heavy metals with a bioconcentration factor (BCF) and translocation factor (TF) greater than 1.0. The recovered liquid fraction possesses a viable microbial concentration of at least 10^8 CFU/mL, providing a cost-effective, "waste-to-product" solution that significantly enhances agronomic yields, biomass, and protein content in sustainable agriculture.
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