Open AccessA CRITICAL REVIEW ON THE EFFECT OF FEED TO INOCULUM RATIO ON BIOGAS DIGESTION
Author(s) -
M. Kalyani,
Shalini Suran,
P. Ramya
Publication year - 2021
Publication title -
international journal of research in science and technology(online)/international journal of research in science and technology
Language(s) - English
Resource type - Journals
eISSN - 2454-180X
pISSN - 2249-0604
DOI - 10.37648/ijrst.v11i02.001
Subject(s) - digestate , anaerobic digestion , biogas , pulp and paper industry , microorganism , biodegradation , environmental science , digestion (alchemy) , waste management , food science , chemistry , microbiology and biotechnology , biology , bacteria , chromatography , methane , engineering , organic chemistry , genetics
This paper primarily focuses on the effect of feed to inoculum ratio on biogas digestion; andoutlines the various feeds, inoculums, and synergistic effects of the combination of inoculums byreferring to the literature. The Start-up of an anaerobic digestion system is highly critical andpivotal for the successful operation of an anaerobic digester. For this purpose, a certain amount ofinoculum is added to the digester along with the substrate to provide the necessarymicroorganisms to initiate the digestion process. The ratio and the type of inoculum usedsubstantially affect the rate of biodegradation and the lag time. The degradation of substratedepends on the concentration of microorganisms. When food waste was considered as the feed itwas found that factors such as waste oil content, the addition of alkaline buffer, particle size,organic loading rate had a considerable effect on the feed to inoculum ratio. Studies consideringsome other feeds such as animal by products from piggery slaughterhouses, poultryslaughterhouse wastes, agro-industrial waste, anaerobically digested sludge obtained frommunicipal wastewater, and dewatered digestate cake were also compared. Hence, the objective ofthis study is to offer an integrated view of the appropriate feed and the inoculum under the effectof various other essential parameters. The major performance indicators from this study werefound to be particle size of inoculum, organic loading rate, the addition of alkaline buffer, F/Iratio, and structure of inoculum