New Invention Profile
| Publication No: | EP4676892 [Europe] | Application No: | EP2024766634 |
| Title: | Dry Anaerobic Digester For Lignocellulosic Biomass with unique hydrodynamics (DADFOR LCB) | ||
| Publication Date: | 14-01-2026 | File Date: | 09-02-2024 |
| Inventor(s): | Rao Anupoju Gangagni; Begum Sameena; Arelli Vijayalakshmi; Juntupally Sudharshan; Mamindlapelli Naveen Kumar; Patil Parmeshwar; Rathore Vivek; Rawat Jaya; Singh Anurag | ||
| IPC Classification: | C02F000328,C02F001104 | ||
| Abstract: | The present invention provides a reactor for the anaerobic digestion of lignocellulosic biomass for biogas and biomanure (digestate) generation. The innovation is designed primarily for the treatment of lignocellulosic biomass such as rice straw/rice husk with a total solids consistency in the slurry between 20 - 40 %. One of the major obstacles in the AD of lignocellulosic biomass is the formation of scum layer on the top surface of the slurry with the fibrous material leading to choking of pipelines. Scum layer formation occurs due to the phase separation of the material into solid and liquid, poor contact between the organic matter and the microorganisms, low heat and mass transfer. Phase separation of solid and liquid occurs particularly in low density materials such as lignocellulosic biomass. Therefore, the reactor is designed in a way that the maximum solids including the fibrous material is retained inside the reactor for efficient digestion. The reactor comprises of a feed hydrolysis duct situated inside the reactor. The hydraulic residence time of the feed hydrolysis duct is delinked with that of the main reactor. Further the reactor is provided with open and closed, perforated cones to ensure efficient movement of the slurry from the top to bottom. Pressurized biogas purging in the bottom elongated cone area of the reactor ensures no settling of solids in the cone, while the slurry recirculation and the pressurized biogas purging inside the digester helps promote efficient mixing of the reactor contents in the digester preventing the formation of phase separation, scum layer formation, choking etc. The feed slurry is initially allowed to flow through the central duct towards the bottom of the reactor which then expands creating an upward flow regime from the bottom due to the presence of a truncated cone. The perforated truncated cones ensure retainment of maximum solids in the reactor arresting any biomass washout. The reactor is also facilitated with a feed preparation system, digestate collection tank, biogas balloon, feed inlet and digestate outlet valve mechanism for controlled feed in and digestate out. | ||
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:https://www.iict.res.in