Device and process for converting organic waste to biogas

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United States of America Patent

PATENT NO 12098351
APP PUB NO 20210332313A1
SERIAL NO

17240163

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Abstract

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The invention relates to a device and process for converting organic waste to biogas with high methane content and improved organic conversion efficiency. Disclosed process consists of two stages and in the first stage, shredded organic waste is digested in primary digester in which biodegradable organic fractions present in waste gets converted to volatile fatty acids and alcohols dissolved in aqueous solution by hydrolytic and acidogenic microorganisms. Primary digester effluent pH, is adjusted to about 6.8-7.5 by addition of controlled alkali solution. Neutralized waste slurry is separated into liquid solution called as leachate and digested solid sludge. In the second stage, liquid leachate comprising volatile fatty acids are converted to biogas with methane content in the range 80-86% by methanogenic microbial culture in main digester under anaerobic conditions. This invention further describes optimized primary and main digester configurations with operating conditions to improve organic conversion efficiency in both the digesters.

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Patent Owner(s)

Patent OwnerAddress
INDIAN OIL CORPORATION LIMITEDINDIAN OIL BHAVAN G-9 ALI YAVAR JUNG MARG BANDRA (EAST) MUMBAI 400 051

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Badhe, Rajesh Haryana, IN 3 481
Damacherla, Mohan Rao Haryana, IN 1 1
Kapur, Gurpreet Singh Haryana, IN 59 103
Kumar, Manoj Haryana, IN 337 4728
Ramakumar, Sankara Sri Venkata Haryana, IN 142 104
Sharma, Alok Haryana, IN 124 1909
Srivastava, Umish Haryana, IN 6 4

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