Open AccessEffect of Food to Microbe (F/M) Ratio on Anaerobic Digestion of Refinery Waste Sludge under Mesophilic Conditions: Biogas Potential and Phytotoxicity
Author(s) -
Sutharat Muenmee,
Suthida Theepharaksapan,
Jarungwit Boonnorat
Publication year - 2021
Publication title -
current applied science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.14
H-Index - 3
ISSN - 2586-9396
DOI - 10.55003/cast.2022.01.22.006
Subject(s) - phytotoxicity , anaerobic digestion , biogas , biosolids , chemistry , mesophile , food waste , food science , agronomy , pulp and paper industry , methane , biology , environmental science , environmental engineering , bacteria , ecology , genetics , organic chemistry , engineering
This study investigated the possibilities of improving biogas yield from anaerobic digestion of refinery activated sludge (RAS) by optimizing the food to microorganism (F/M) ratio. Different F/M ratios of 0.25, 0.50, 1.00 and 2.00 were studied. The highest biogas production (147.98±7.40 ml/gvs), methane production (51.41±1.78 ml/gvs) and methane content (42.00±5.90%) were obtained from the F/M ratio of 1.00 followed by 0.50, 0.25 and 2.00, respectively. The phytotoxicity of biosolids that came from anaerobic digestion was also evaluated using three different types of seed (Vigna radiata, Brassica rapa and Lycopersicon esculentum) during this process. Increasing amount of RAS via increasing of the F/M ratio (0.25-1.00) stimulated plant development (GI>100) and reduced the phytotoxicity of RAS.